cppcheck/lib/symboldatabase.cpp

/*
 * Cppcheck - A tool for static C/C++ code analysis
 * Copyright (C) 2007-2014 Daniel Marjamäki and Cppcheck team.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

//---------------------------------------------------------------------------
#include "symboldatabase.h"

#include "tokenize.h"
#include "token.h"
#include "settings.h"
#include "errorlogger.h"

#include <string>
#include <ostream>
#include <climits>
#include <iostream>

//---------------------------------------------------------------------------

SymbolDatabase::SymbolDatabase(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
    : _tokenizer(tokenizer), _settings(settings), _errorLogger(errorLogger)
{
    // create global scope
    scopeList.push_back(Scope(this, nullptr, nullptr));

    // pointer to current scope
    Scope *scope = &scopeList.back();

    // Store current access in each scope (depends on evaluation progress)
    std::map<const Scope*, AccessControl> access;

    std::map<const Token *, Scope *> back;

    // find all scopes
    for (const Token *tok = _tokenizer->tokens(); tok; tok = tok ? tok->next() : nullptr) {
        // #5593 suggested to add here:
        if (_errorLogger)
            _errorLogger->reportProgress(_tokenizer->list.getSourceFilePath(),
                                         "SymbolDatabase",
                                         tok->progressValue());
        // Locate next class
        if (Token::Match(tok, "class|struct|union|namespace ::| %var% {|:|::") &&
            tok->strAt(-1) != "friend") {
            const Token *tok2 = tok->tokAt(2);

            if (tok->strAt(1) == "::")
                tok2 = tok2->next();

            while (tok2 && tok2->str() == "::")
                tok2 = tok2->tokAt(2);

            // make sure we have valid code
            if (!tok2 || !Token::Match(tok2, "{|:")) {
                // check for qualified variable
                if (tok2 && tok2->next()) {
                    if (tok2->next()->str() == ";")
                        tok = tok2->next();
                    else if (Token::simpleMatch(tok2->next(), "= {") &&
                             tok2->linkAt(2)->next()->str() == ";")
                        tok = tok2->linkAt(2)->next();
                    else if (Token::Match(tok2->next(), "(|{") &&
                             tok2->next()->link()->strAt(1) == ";")
                        tok = tok2->next()->link()->next();
                    else
                        break; // bail
                    continue;
                }
                break; // bail
            }

            Scope *new_scope = findScope(tok->next(), scope);

            if (new_scope) {
                // only create base list for classes and structures
                if (new_scope->isClassOrStruct()) {
                    // goto initial '{'
                    tok2 = new_scope->definedType->initBaseInfo(tok, tok2);

                    // make sure we have valid code
                    if (!tok2) {
                        break;
                    }
                }

                // definition may be different than declaration
                if (tok->str() == "class") {
                    access[new_scope] = Private;
                    new_scope->type = Scope::eClass;
                } else if (tok->str() == "struct") {
                    access[new_scope] = Public;
                    new_scope->type = Scope::eStruct;
                }

                back[tok2->link()] = scope;
                new_scope->classDef = tok;
                new_scope->classStart = tok2;
                new_scope->classEnd = tok2->link();
                scope = new_scope;
                tok = tok2;
            } else {
                scopeList.push_back(Scope(this, tok, scope));
                new_scope = &scopeList.back();

                if (tok->str() == "class")
                    access[new_scope] = Private;
                else if (tok->str() == "struct")
                    access[new_scope] = Public;

                // fill typeList...
                if (new_scope->isClassOrStruct() || new_scope->type == Scope::eUnion) {
                    Type* new_type = findType(tok->next(), scope);
                    if (!new_type) {
                        typeList.push_back(Type(new_scope->classDef, new_scope, scope));
                        new_type = &typeList.back();
                        scope->definedTypes.push_back(new_type);
                    } else
                        new_type->classScope = new_scope;
                    new_scope->definedType = new_type;
                }

                // only create base list for classes and structures
                if (new_scope->isClassOrStruct()) {
                    // goto initial '{'
                    tok2 = new_scope->definedType->initBaseInfo(tok, tok2);

                    // make sure we have valid code
                    if (!tok2) {
                        _tokenizer->syntaxError(tok);
                    }
                }

                new_scope->classStart = tok2;
                new_scope->classEnd = tok2->link();

                // make sure we have valid code
                if (!new_scope->classEnd) {
                    _tokenizer->syntaxError(tok);
                }

                // make the new scope the current scope
                scope->nestedList.push_back(new_scope);
                scope = new_scope;

                tok = tok2;
            }
        }

        // Namespace and unknown macro (#3854)
        else if (Token::Match(tok, "namespace %var% %type% (") &&
                 _tokenizer->isCPP() &&
                 tok->tokAt(2)->isUpperCaseName() &&
                 Token::simpleMatch(tok->linkAt(3), ") {")) {
            scopeList.push_back(Scope(this, tok, scope));

            Scope *new_scope = &scopeList.back();
            access[new_scope] = Public;

            const Token *tok2 = tok->linkAt(3)->next();

            new_scope->classStart = tok2;
            new_scope->classEnd = tok2->link();

            // make sure we have valid code
            if (!new_scope->classEnd) {
                scopeList.pop_back();
                break;
            }

            // make the new scope the current scope
            scope->nestedList.push_back(new_scope);
            scope = &scopeList.back();

            tok = tok2;
        }

        // forward declaration
        else if (Token::Match(tok, "class|struct|union %var% ;") &&
                 tok->strAt(-1) != "friend") {
            if (!findType(tok->next(), scope)) {
                // fill typeList..
                typeList.push_back(Type(tok, 0, scope));
                scope->definedTypes.push_back(&typeList.back());
            }
            tok = tok->tokAt(2);
        }

        // using namespace
        else if (Token::Match(tok, "using namespace ::| %type% ;|::")) {
            Scope::UsingInfo using_info;

            using_info.start = tok; // save location
            using_info.scope = findNamespace(tok->tokAt(2), scope);

            scope->usingList.push_back(using_info);

            // check for global namespace
            if (tok->strAt(2) == "::")
                tok = tok->tokAt(4);
            else
                tok = tok->tokAt(3);

            // skip over qualification
            while (tok && Token::Match(tok, "%type% ::"))
                tok = tok->tokAt(2);
        }

        // unnamed struct and union
        else if (Token::Match(tok, "struct|union {") &&
                 Token::Match(tok->next()->link(), "} *|&| %var% ;|[")) {
            scopeList.push_back(Scope(this, tok, scope));

            Scope *new_scope = &scopeList.back();
            access[new_scope] = Public;

            const Token* varNameTok = tok->next()->link()->next();
            if (varNameTok->str() == "*") {
                varNameTok = varNameTok->next();
            } else if (varNameTok->str() == "&") {
                varNameTok = varNameTok->next();
            }

            typeList.push_back(Type(tok, new_scope, scope));
            new_scope->definedType = &typeList.back();
            scope->definedTypes.push_back(&typeList.back());

            scope->addVariable(varNameTok, tok, tok, access[scope], new_scope->definedType, scope);

            const Token *tok2 = tok->next();

            new_scope->classStart = tok2;
            new_scope->classEnd = tok2->link();

            // make sure we have valid code
            if (!new_scope->classEnd) {
                scopeList.pop_back();
                break;
            }

            // make the new scope the current scope
            scope->nestedList.push_back(new_scope);
            scope = new_scope;

            tok = tok2;
        }

        // anonymous struct and union
        else if (Token::Match(tok, "struct|union {") &&
                 Token::simpleMatch(tok->next()->link(), "} ;")) {
            scopeList.push_back(Scope(this, tok, scope));

            Scope *new_scope = &scopeList.back();
            access[new_scope] = Public;

            const Token *tok2 = tok->next();

            new_scope->classStart = tok2;
            new_scope->classEnd = tok2->link();

            typeList.push_back(Type(tok, new_scope, scope));
            new_scope->definedType = &typeList.back();
            scope->definedTypes.push_back(&typeList.back());

            // make sure we have valid code
            if (!new_scope->classEnd) {
                scopeList.pop_back();
                break;
            }

            // make the new scope the current scope
            scope->nestedList.push_back(new_scope);
            scope = new_scope;

            tok = tok2;
        }

        else {
            // check for end of scope
            if (tok == scope->classEnd) {
                if (back.find(tok) != back.end()) {
                    scope = back[tok];
                    back.erase(tok);
                } else
                    scope = const_cast<Scope*>(scope->nestedIn);
                continue;
            }

            // check if in class or structure
            else if (scope->type == Scope::eClass || scope->type == Scope::eStruct) {
                const Token *funcStart = nullptr;
                const Token *argStart = nullptr;

                // What section are we in..
                if (tok->str() == "private:")
                    access[scope] = Private;
                else if (tok->str() == "protected:")
                    access[scope] = Protected;
                else if (tok->str() == "public:" || tok->str() == "__published:")
                    access[scope] = Public;
                else if (Token::Match(tok, "public|protected|private %var% :")) {
                    if (tok->str() == "private")
                        access[scope] = Private;
                    else if (tok->str() == "protected")
                        access[scope] = Protected;
                    else
                        access[scope] = Public;

                    tok = tok->tokAt(2);
                }

                // class function?
                else if (isFunction(tok, scope, &funcStart, &argStart)) {
                    if (tok->previous()->str() != "::") {
                        Function function;

                        // save the function definition argument start '('
                        function.argDef = argStart;

                        // save the access type
                        function.access = access[scope];

                        // save the function name location
                        function.tokenDef = funcStart;

                        // save the function parent scope
                        function.nestedIn = scope;

                        // operator function
                        if (function.tokenDef->str().find("operator") == 0) {
                            function.isOperator = true;

                            // 'operator =' is special
                            if (function.tokenDef->str() == "operator=")
                                function.type = Function::eOperatorEqual;
                        }

                        // class constructor/destructor
                        else if (function.tokenDef->str() == scope->className) {
                            // destructor
                            if (function.tokenDef->previous()->str() == "~")
                                function.type = Function::eDestructor;

                            // copy/move constructor?
                            else if (Token::Match(function.tokenDef, "%var% ( const| %var% &|&& &| %var%| )") ||
                                     Token::Match(function.tokenDef, "%var% ( const| %var% <")) {
                                const Token* typTok = function.tokenDef->tokAt(2);
                                if (typTok->str() == "const")
                                    typTok = typTok->next();
                                if (typTok->strAt(1) == "<") { // TODO: Remove this branch (#4710)
                                    if (Token::Match(typTok->linkAt(1), "> & %var%| )"))
                                        function.type = Function::eCopyConstructor;
                                    else if (Token::Match(typTok->linkAt(1), "> &&|& & %var%| )"))
                                        function.type = Function::eMoveConstructor;
                                    else
                                        function.type = Function::eConstructor;
                                } else if (typTok->strAt(1) == "&&" || typTok->strAt(2) == "&")
                                    function.type = Function::eMoveConstructor;
                                else
                                    function.type = Function::eCopyConstructor;

                                if (typTok->str() != function.tokenDef->str())
                                    function.type = Function::eConstructor; // Overwrite, if types are not identical
                            }
                            // regular constructor
                            else
                                function.type = Function::eConstructor;

                            if (function.tokenDef->previous()->str() == "explicit")
                                function.isExplicit = true;
                        }

                        const Token *tok1 = tok;

                        // look for end of previous statement
                        while (tok1->previous() && !Token::Match(tok1->previous(), ";|}|{|public:|protected:|private:")) {
                            // virtual function
                            if (tok1->previous()->str() == "virtual") {
                                function.isVirtual = true;
                                break;
                            }

                            // static function
                            else if (tok1->previous()->str() == "static") {
                                function.isStatic = true;
                                break;
                            }

                            // friend function
                            else if (tok1->previous()->str() == "friend") {
                                function.isFriend = true;
                                break;
                            }

                            tok1 = tok1->previous();
                        }

                        // find the return type
                        if (!function.isConstructor() && !function.isDestructor()) {
                            while (tok1 && Token::Match(tok1->next(), "virtual|static|friend|const|struct|union"))
                                tok1 = tok1->next();

                            if (tok1)
                                function.retDef = tok1;
                        }

                        const Token *end = function.argDef->link();

                        // const function
                        if (end->next()->str() == "const")
                            function.isConst = true;

                        // count the number of constructors
                        if (function.isConstructor())
                            scope->numConstructors++;
                        if (function.type == Function::eCopyConstructor ||
                            function.type == Function::eMoveConstructor)
                            scope->numCopyOrMoveConstructors++;

                        // assume implementation is inline (definition and implementation same)
                        function.token = function.tokenDef;
                        function.arg = function.argDef;

                        // out of line function
                        if (Token::simpleMatch(end, ") ;")) {
                            // find the function implementation later
                            tok = end->next();

                            scope->functionList.push_back(function);
                        }

                        // default or delete
                        else if (Token::Match(end, ") = default|delete ;")) {
                            if (end->strAt(2) == "default")
                                function.isDefault = true;
                            else
                                function.isDelete = true;

                            tok = end->tokAt(3);

                            scope->functionList.push_back(function);
                        }

                        // noexcept;
                        // noexcept = 0;
                        // const noexcept;
                        // const noexcept = 0;
                        else if (Token::Match(end, ") const| noexcept ;|=")) {
                            function.isNoExcept = true;

                            if (end->next()->str() == "const")
                                tok = end->tokAt(3);
                            else
                                tok = end->tokAt(2);

                            if (Token::Match(tok, "= %any% ;")) {
                                function.isPure = true;
                                tok = tok->tokAt(2);
                            }

                            scope->functionList.push_back(function);
                        }

                        // noexcept(...);
                        // noexcept(...) = 0;
                        // const noexcept(...);
                        // const noexcept(...) = 0;
                        else if (Token::Match(end, ") const| noexcept (") &&
                                 (end->next()->str() == "const" ? Token::Match(end->linkAt(3), ") ;|=") :
                                  Token::Match(end->linkAt(2), ") ;|="))) {
                            function.isNoExcept = true;

                            if (end->next()->str() == "const")
                                tok = end->tokAt(3);
                            else
                                tok = end->tokAt(2);

                            if (Token::Match(tok, "= %any% ;")) {
                                function.isPure = true;
                                tok = tok->tokAt(2);
                            }

                            scope->functionList.push_back(function);
                        }

                        // throw();
                        // throw() = 0;
                        // const throw();
                        // const throw() = 0;
                        else if (Token::Match(end, ") const| throw (") &&
                                 (end->next()->str() == "const" ? Token::Match(end->linkAt(3), ") ;|=") :
                                  Token::Match(end->linkAt(2), ") ;|="))) {
                            function.isThrow = true;

                            if (end->next()->str() == "const") {
                                if (end->strAt(4) != ")")
                                    function.throwArg = end->tokAt(4);
                                tok = end->linkAt(3)->next();
                            } else {
                                if (end->strAt(3) != ")")
                                    function.throwArg = end->tokAt(3);
                                tok = end->linkAt(2)->next();
                            }

                            if (Token::Match(tok, "= %any% ;")) {
                                function.isPure = true;
                                tok = tok->tokAt(2);
                            }

                            scope->functionList.push_back(function);
                        }

                        // pure virtual function
                        else if (Token::Match(end, ") const| = %any% ;")) {
                            function.isPure = true;

                            if (end->next()->str() == "const")
                                tok = end->tokAt(4);
                            else
                                tok = end->tokAt(3);

                            scope->functionList.push_back(function);
                        }

                        // 'const' or unknown macro (#5197)
                        else if (Token::Match(end, ") %any% ;")) {
                            tok = end->tokAt(2);
                            scope->functionList.push_back(function);
                        }

                        // inline function
                        else {
                            function.isInline = true;
                            function.hasBody = true;

                            if (Token::Match(end, ") const| noexcept")) {
                                int arg = 2;

                                if (end->strAt(1) == "const")
                                    arg++;

                                if (end->strAt(arg) == "(")
                                    function.noexceptArg = end->tokAt(arg + 1);

                                function.isNoExcept = true;
                            } else if (Token::Match(end, ") const| throw (")) {
                                int arg = 3;

                                if (end->strAt(1) == "const")
                                    arg++;

                                if (end->strAt(arg) != ")")
                                    function.throwArg = end->tokAt(arg);

                                function.isThrow = true;
                            }

                            // find start of function '{'
                            while (end && end->str() != "{" && end->str() != ";")
                                end = end->next();
                            if (!end || end->str() == ";")
                                continue;

                            scope->functionList.push_back(function);

                            Function* funcptr = &scope->functionList.back();
                            const Token *tok2 = funcStart;

                            addNewFunction(&scope, &tok2);
                            if (scope) {
                                scope->functionOf = function.nestedIn;
                                scope->function = funcptr;
                                scope->function->functionScope = scope;
                            }

                            tok = tok2;
                        }
                    }

                    // nested class or friend function?
                    else {
                        /** @todo check entire qualification for match */
                        Scope * nested = scope->findInNestedListRecursive(tok->strAt(-2));

                        if (nested)
                            addClassFunction(&scope, &tok, argStart);
                        else {
                            /** @todo handle friend functions */
                        }
                    }
                }

                // friend class declaration?
                else if (Token::Match(tok, "friend class| ::| %any% ;|::")) {
                    Type::FriendInfo friendInfo;

                    // save the name start
                    friendInfo.nameStart = tok->strAt(1) == "class" ? tok->tokAt(2) : tok->next();
                    friendInfo.nameEnd = friendInfo.nameStart;

                    // skip leading "::"
                    if (friendInfo.nameEnd->str() == "::")
                        friendInfo.nameEnd = friendInfo.nameEnd->next();

                    // skip qualification "name ::"
                    while (friendInfo.nameEnd && friendInfo.nameEnd->strAt(1) == "::")
                        friendInfo.nameEnd = friendInfo.nameEnd->tokAt(2);

                    // save the name
                    if (friendInfo.nameEnd)
                        friendInfo.name = friendInfo.nameEnd->str();

                    // fill this in after parsing is complete
                    friendInfo.type = 0;

                    scope->definedType->friendList.push_back(friendInfo);
                }
            } else if (scope->type == Scope::eNamespace || scope->type == Scope::eGlobal) {
                const Token *funcStart = nullptr;
                const Token *argStart = nullptr;

                // function?
                if (isFunction(tok, scope, &funcStart, &argStart)) {
                    const Token* scopeBegin = argStart->link()->next();
                    if (scopeBegin->isName()) { // Jump behind 'const' or unknown Macro
                        scopeBegin = scopeBegin->next();
                        if (scopeBegin->str() == "throw")
                            scopeBegin = scopeBegin->next();

                        if (scopeBegin->link() && scopeBegin->str() == "(") // Jump behind unknown macro of type THROW(...)
                            scopeBegin = scopeBegin->link()->next();
                    }

                    // has body?
                    if (scopeBegin->str() == "{" || scopeBegin->str() == ":") {
                        tok = funcStart;

                        // class function
                        if (tok->previous() && tok->previous()->str() == "::")
                            addClassFunction(&scope, &tok, argStart);

                        // class destructor
                        else if (tok->previous() &&
                                 tok->previous()->str() == "~" &&
                                 tok->strAt(-2) == "::")
                            addClassFunction(&scope, &tok, argStart);

                        // regular function
                        else {
                            Function* function = addGlobalFunction(scope, tok, argStart, funcStart);

                            if (!function)
                                _tokenizer->syntaxError(tok);

                            // global functions can't be const but we have tests that are
                            if (Token::Match(argStart->link(), ") const| noexcept")) {
                                int arg = 2;

                                if (argStart->link()->strAt(1) == "const")
                                    arg++;

                                if (argStart->link()->strAt(arg) == "(")
                                    function->noexceptArg = argStart->link()->tokAt(arg + 1);

                                function->isNoExcept = true;
                            } else if (Token::Match(argStart->link(), ") const| throw (")) {
                                int arg = 3;

                                if (argStart->link()->strAt(1) == "const")
                                    arg++;

                                if (argStart->link()->strAt(arg) != ")")
                                    function->throwArg = argStart->link()->tokAt(arg);

                                function->isThrow = true;
                            }
                        }

                        // syntax error?
                        if (!scope)
                            _tokenizer->syntaxError(tok);
                    }
                    // function prototype?
                    else if (scopeBegin->str() == ";") {
                        bool newFunc = true; // Is this function already in the database?
                        for (std::list<Function>::const_iterator i = scope->functionList.begin(); i != scope->functionList.end(); ++i) {
                            if (i->tokenDef->str() == tok->str() && Function::argsMatch(scope, i->argDef->next(), argStart->next(), "", 0)) {
                                newFunc = false;
                                break;
                            }
                        }

                        // save function prototype in database
                        if (newFunc) {
                            Function* func = addGlobalFunctionDecl(scope, tok, argStart, funcStart);

                            if (Token::Match(argStart->link(), ") const| noexcept")) {
                                int arg = 2;

                                if (argStart->link()->strAt(1) == "const")
                                    arg++;

                                if (argStart->link()->strAt(arg) == "(")
                                    func->noexceptArg = argStart->link()->tokAt(arg + 1);

                                func->isNoExcept = true;
                            } else if (Token::Match(argStart->link(), ") const| throw (")) {
                                int arg = 3;

                                if (argStart->link()->strAt(1) == "const")
                                    arg++;

                                if (argStart->link()->strAt(arg) != ")")
                                    func->throwArg = argStart->link()->tokAt(arg);

                                func->isThrow = true;
                            }
                        }

                        tok = scopeBegin;
                        continue;
                    }
                }
            } else if (scope->isExecutable()) {
                if (Token::Match(tok, "else|try|do {")) {
                    const Token* tok1 = tok->next();
                    if (tok->str() == "else")
                        scopeList.push_back(Scope(this, tok, scope, Scope::eElse, tok1));
                    if (tok->str() == "do")
                        scopeList.push_back(Scope(this, tok, scope, Scope::eDo, tok1));
                    else if (tok->str() == "try")
                        scopeList.push_back(Scope(this, tok, scope, Scope::eTry, tok1));

                    tok = tok1;
                    scope->nestedList.push_back(&scopeList.back());
                    scope = &scopeList.back();
                } else if (Token::Match(tok, "if|for|while|catch|switch (") && Token::simpleMatch(tok->next()->link(), ") {")) {
                    const Token *tok1 = tok->next()->link()->next();
                    if (tok->str() == "if" && tok->strAt(-1) == "else")
                        scopeList.push_back(Scope(this, tok->previous(), scope, Scope::eElseIf, tok1));
                    else if (tok->str() == "if")
                        scopeList.push_back(Scope(this, tok, scope, Scope::eIf, tok1));
                    else if (tok->str() == "for") {
                        scopeList.push_back(Scope(this, tok, scope, Scope::eFor, tok1));
                    } else if (tok->str() == "while")
                        scopeList.push_back(Scope(this, tok, scope, Scope::eWhile, tok1));
                    else if (tok->str() == "catch") {
                        scopeList.push_back(Scope(this, tok, scope, Scope::eCatch, tok1));
                    } else if (tok->str() == "switch")
                        scopeList.push_back(Scope(this, tok, scope, Scope::eSwitch, tok1));

                    scope->nestedList.push_back(&scopeList.back());
                    scope = &scopeList.back();
                    if (scope->type == Scope::eFor)
                        scope->checkVariable(tok->tokAt(2), Local); // check for variable declaration and add it to new scope if found
                    else if (scope->type == Scope::eCatch)
                        scope->checkVariable(tok->tokAt(2), Throw); // check for variable declaration and add it to new scope if found
                    tok = tok1;
                } else if (tok->str() == "{") {
                    if (!Token::Match(tok->previous(), "=|,")) {
                        scopeList.push_back(Scope(this, tok, scope, Scope::eUnconditional, tok));
                        scope->nestedList.push_back(&scopeList.back());
                        scope = &scopeList.back();
                    } else {
                        tok = tok->link();
                    }
                }
            }
        }
    }

    // fill in base class info
    for (std::list<Type>::iterator it = typeList.begin(); it != typeList.end(); ++it) {
        // finish filling in base class info
        for (unsigned int i = 0; i < it->derivedFrom.size(); ++i)
            it->derivedFrom[i].type = findType(it->derivedFrom[i].nameTok, it->enclosingScope);
    }

    // fill in friend info
    for (std::list<Type>::iterator it = typeList.begin(); it != typeList.end(); ++it) {
        for (std::list<Type::FriendInfo>::iterator i = it->friendList.begin(); i != it->friendList.end(); ++i) {
            i->type = findType(i->nameStart, it->enclosingScope);
        }
    }

    // fill in using info
    for (std::list<Scope>::iterator it = scopeList.begin(); it != scopeList.end(); ++it) {
        for (std::list<Scope::UsingInfo>::iterator i = it->usingList.begin(); i != it->usingList.end(); ++i) {
            // only find if not already found
            if (i->scope == nullptr) {
                // check scope for match
                scope = findScope(i->start->tokAt(2), &(*it));
                if (scope) {
                    // set found scope
                    i->scope = scope;
                    break;
                }
            }
        }
    }

    // fill in variable info
    for (std::list<Scope>::iterator it = scopeList.begin(); it != scopeList.end(); ++it) {
        // find variables
        it->getVariableList();
    }

    // fill in function arguments
    for (std::list<Scope>::iterator it = scopeList.begin(); it != scopeList.end(); ++it) {
        std::list<Function>::iterator func;

        for (func = it->functionList.begin(); func != it->functionList.end(); ++func) {
            // add arguments
            func->addArguments(this, scope);
        }
    }

    // fill in function scopes
    for (std::list<Scope>::iterator it = scopeList.begin(); it != scopeList.end(); ++it) {
        if (it->type == Scope::eFunction)
            functionScopes.push_back(&*it);
    }

    // fill in class and struct scopes
    for (std::list<Scope>::iterator it = scopeList.begin(); it != scopeList.end(); ++it) {
        if (it->isClassOrStruct())
            classAndStructScopes.push_back(&*it);
    }

    // fill in function return types
    for (std::list<Scope>::iterator it = scopeList.begin(); it != scopeList.end(); ++it) {
        std::list<Function>::iterator func;

        for (func = it->functionList.begin(); func != it->functionList.end(); ++func) {
            // add return types
            if (func->retDef) {
                const Token *type = func->retDef;
                while (Token::Match(type, "static|const|struct|union"))
                    type = type->next();
                if (type)
                    func->retType = findTypeInNested(type, func->nestedIn);
            }
        }
    }

    // determine if user defined type needs initialization
    unsigned int unknowns = 0; // stop checking when there are no unknowns
    unsigned int retry = 0;    // bail if we don't resolve all the variable types for some reason

    do {
        unknowns = 0;

        for (std::list<Scope>::iterator it = scopeList.begin(); it != scopeList.end(); ++it) {
            scope = &(*it);

            if (!scope->definedType) {
                _blankTypes.push_back(Type());
                scope->definedType = &_blankTypes.back();
            }

            if (scope->isClassOrStruct() && scope->definedType->needInitialization == Type::Unknown) {
                // check for default constructor
                bool hasDefaultConstructor = false;

                std::list<Function>::const_iterator func;

                for (func = scope->functionList.begin(); func != scope->functionList.end(); ++func) {
                    if (func->type == Function::eConstructor) {
                        // check for no arguments: func ( )
                        if (func->argCount() == 0) {
                            hasDefaultConstructor = true;
                            break;
                        }

                        /** check for arguments with default values */
                        else if (func->argCount() == func->initializedArgCount()) {
                            hasDefaultConstructor = true;
                            break;
                        }
                    }
                }

                // User defined types with user defined default constructor doesn't need initialization.
                // We assume the default constructor initializes everything.
                // Another check will figure out if the constructor actually initializes everything.
                if (hasDefaultConstructor)
                    scope->definedType->needInitialization = Type::False;

                // check each member variable to see if it needs initialization
                else {
                    bool needInitialization = false;
                    bool unknown = false;

                    std::list<Variable>::const_iterator var;
                    for (var = scope->varlist.begin(); var != scope->varlist.end(); ++var) {
                        if (var->isClass()) {
                            if (var->type()) {
                                // does this type need initialization?
                                if (var->type()->needInitialization == Type::True)
                                    needInitialization = true;
                                else if (var->type()->needInitialization == Type::Unknown)
                                    unknown = true;
                            }
                        } else
                            needInitialization = true;
                    }

                    if (!unknown) {
                        if (needInitialization)
                            scope->definedType->needInitialization = Type::True;
                        else
                            scope->definedType->needInitialization = Type::False;
                    }

                    if (scope->definedType->needInitialization == Type::Unknown)
                        unknowns++;
                }
            } else if (scope->type == Scope::eUnion && scope->definedType->needInitialization == Type::Unknown)
                scope->definedType->needInitialization = Type::True;
        }

        retry++;
    } while (unknowns && retry < 100);

    // this shouldn't happen so output a debug warning
    if (retry == 100 && _settings->debugwarnings) {
        for (std::list<Scope>::iterator it = scopeList.begin(); it != scopeList.end(); ++it) {
            scope = &(*it);

            if (scope->isClassOrStruct() && scope->definedType->needInitialization == Type::Unknown)
                debugMessage(scope->classDef, "SymbolDatabase::SymbolDatabase couldn't resolve all user defined types.");
        }
    }

    // create variable symbol table
    _variableList.resize(_tokenizer->varIdCount() + 1);
    std::fill_n(_variableList.begin(), _variableList.size(), (const Variable*)nullptr);

    // check all scopes for variables
    for (std::list<Scope>::iterator it = scopeList.begin(); it != scopeList.end(); ++it) {
        scope = &(*it);

        // add all variables
        std::list<Variable>::iterator var;
        for (var = scope->varlist.begin(); var != scope->varlist.end(); ++var) {
            unsigned int varId = var->declarationId();
            if (varId)
                _variableList[varId] = &(*var);
            // fix up variables without type
            if (!var->type() && !var->typeStartToken()->isStandardType()) {
                const Type *type = findType(var->typeStartToken(), scope);
                if (type)
                    var->type(type);
            }
        }

        // add all function parameters
        std::list<Function>::iterator func;
        for (func = scope->functionList.begin(); func != scope->functionList.end(); ++func) {
            std::list<Variable>::iterator arg;
            for (arg = func->argumentList.begin(); arg != func->argumentList.end(); ++arg) {
                // check for named parameters
                if (arg->nameToken() && arg->declarationId()) {
                    const unsigned int declarationId = arg->declarationId();
                    if (declarationId > 0U)
                        _variableList[declarationId] = &(*arg);
                    // fix up parameters without type
                    if (!arg->type() && !arg->typeStartToken()->isStandardType()) {
                        const Type *type = findTypeInNested(arg->typeStartToken(), scope);
                        if (type)
                            arg->type(type);
                    }
                }
            }
        }
    }

    // fill in missing variables if possible
    const std::size_t functions = functionScopes.size();
    for (std::size_t i = 0; i < functions; ++i) {
        const Scope *func = functionScopes[i];
        for (const Token *tok = func->classStart->next(); tok != func->classEnd; tok = tok->next()) {
            // check for member variable
            if (tok && tok->varId() && tok->next() &&
                (tok->next()->str() == "." ||
                 (tok->next()->str() == "[" && tok->linkAt(1)->strAt(1) == "."))) {
                const Token *tok1 = tok->next()->str() == "." ? tok->tokAt(2) : tok->linkAt(1)->tokAt(2);
                if (tok1 && tok1->varId() && _variableList[tok1->varId()] == 0) {
                    const Variable *var = _variableList[tok->varId()];
                    if (var && var->typeScope()) {
                        // find the member variable of this variable
                        const Variable *var1 = var->typeScope()->getVariable(tok1->str());
                        if (var1) {
                            // add this variable to the look up table
                            _variableList[tok1->varId()] = var1;
                        }
                    }
                }
            }
        }
    }

    /* set all unknown array dimensions that are set by a variable to the maximum size of that variable type */
    for (std::size_t i = 1; i <= _tokenizer->varIdCount(); i++) {
        // check each array variable
        if (_variableList[i] && _variableList[i]->isArray()) {
            // check each array dimension
            for (std::size_t j = 0; j < _variableList[i]->dimensions().size(); j++) {
                Dimension &dimension = const_cast<Dimension &>(_variableList[i]->dimensions()[j]);
                // check for a single token dimension that is a variable
                if (dimension.num == 0) {
                    dimension.known = false;
                    if (!dimension.start || (dimension.start != dimension.end) || !dimension.start->varId())
                        continue;

                    // get maximum size from type
                    // find where this type is defined
                    const Variable *var = getVariableFromVarId(dimension.start->varId());

                    // make sure it is in the database
                    if (!var)
                        break;

                    // get type token
                    const Token *index_type = var->typeEndToken();

                    if (index_type->str() == "char") {
                        if (index_type->isUnsigned())
                            dimension.num = UCHAR_MAX + 1;
                        else if (index_type->isSigned())
                            dimension.num = SCHAR_MAX + 1;
                        else
                            dimension.num = CHAR_MAX + 1;
                    } else if (index_type->str() == "short") {
                        if (index_type->isUnsigned())
                            dimension.num = USHRT_MAX + 1;
                        else
                            dimension.num = SHRT_MAX + 1;
                    }

                    // checkScope assumes size is signed int so we limit the following sizes to INT_MAX
                    else if (index_type->str() == "int") {
                        if (index_type->isUnsigned())
                            dimension.num = UINT_MAX + 1ULL;
                        else
                            dimension.num = INT_MAX + 1ULL;
                    } else if (index_type->str() == "long") {
                        if (index_type->isUnsigned()) {
                            if (index_type->isLong())
                                dimension.num = ULLONG_MAX; // should be ULLONG_MAX + 1ULL
                            else
                                dimension.num = ULONG_MAX; // should be ULONG_MAX + 1ULL
                        } else {
                            if (index_type->isLong())
                                dimension.num = LLONG_MAX; // should be LLONG_MAX + 1LL
                            else
                                dimension.num = LONG_MAX;  // should be LONG_MAX + 1LL
                        }
                    }
                }
            }
        }
    }
}

bool SymbolDatabase::isFunction(const Token *tok, const Scope* outerScope, const Token **funcStart, const Token **argStart)
{
    // function returning function pointer? '... ( ... %var% ( ... ))( ... ) {'
    if (tok->str() == "(" &&
        tok->link()->previous()->str() == ")") {
        const Token* tok2 = tok->link()->next();
        if (tok2 && tok2->str() == "(" && Token::Match(tok2->link()->next(), "{|;|const|=")) {
            *funcStart = tok->link()->previous()->link()->previous();
            *argStart = tok->link()->previous()->link();
            return true;
        }
    }

    // regular function?
    else if (Token::Match(tok, "%var% (") && tok->previous() &&
             (tok->previous()->isName() || tok->strAt(-1) == ">" || tok->strAt(-1) == "&" || tok->strAt(-1) == "*" || // Either a return type in front of tok
              tok->strAt(-1) == "::" || tok->strAt(-1) == "~" || // or a scope qualifier in front of tok
              outerScope->isClassOrStruct())) { // or a ctor/dtor
        const Token* tok2 = tok->next()->link()->next();
        if (tok2 &&
            (Token::Match(tok2, "const| ;|{|=") ||
             (Token::Match(tok2, "%var% ;|{") && tok2->isUpperCaseName()) ||
             (Token::Match(tok2, "%var% (") && tok2->isUpperCaseName() && tok2->next()->link()->strAt(1) == "{") ||
             Token::Match(tok2, ": ::| %var% (|::|<|{") ||
             Token::Match(tok2, "= delete|default ;") ||
             Token::Match(tok2, "const| noexcept {|:|;|=") ||
             (Token::Match(tok2, "const| noexcept|throw (") &&
              tok2->str() == "const" ? (tok2->tokAt(2) && Token::Match(tok2->linkAt(2), ") const| {|:|;|=")) :
              (tok2->next() && Token::Match(tok2->next()->link(), ") {|:|;|="))))) {
            *funcStart = tok;
            *argStart = tok->next();
            return true;
        }
    }

    // UNKNOWN_MACRO(a,b) { ... }
    else if (outerScope->type == Scope::eGlobal &&
             Token::Match(tok, "%var% (") &&
             tok->isUpperCaseName() &&
             Token::simpleMatch(tok->linkAt(1), ") {") &&
             (!tok->previous() || Token::Match(tok->previous(), "[;{}]"))) {
        *funcStart = tok;
        *argStart = tok->next();
        return true;
    }

    // template constructor?
    else if (Token::Match(tok, "%var% <") && Token::simpleMatch(tok->next()->link(), "> (")) {
        const Token* tok2 = tok->next()->link()->next()->link();
        if (Token::Match(tok2, ") const| ;|{|=") ||
            Token::Match(tok2, ") : ::| %var% (|::|<|{") ||
            Token::Match(tok->next()->link()->next()->link(), ") const| noexcept {|;|(")) {
            *funcStart = tok;
            *argStart = tok2->link();
            return true;
        }
    }

    return false;
}

void Variable::evaluate()
{
    const Token* tok = _start;
    while (tok && tok->previous() && tok->previous()->isName())
        tok = tok->previous();
    for (const Token* const end = _name?_name:_end; tok != end;) {
        if (tok->str() == "static")
            setFlag(fIsStatic, true);
        else if (tok->str() == "extern")
            setFlag(fIsExtern, true);
        else if (tok->str() == "mutable")
            setFlag(fIsMutable, true);
        else if (tok->str() == "const")
            setFlag(fIsConst, true);
        else if (tok->str() == "*") {
            setFlag(fIsPointer, true);
            setFlag(fIsConst, false); // Points to const, isn't necessarily const itself
        } else if (tok->str() == "&") {
            if (isReference())
                setFlag(fIsRValueRef, true);
            setFlag(fIsReference, true);
        } else if (tok->str() == "&&") { // Before simplification, && isn't split up
            setFlag(fIsRValueRef, true);
            setFlag(fIsReference, true); // Set also fIsReference
        }

        if (tok->str() == "<" && tok->link())
            tok = tok->link();
        else
            tok = tok->next();
    }

    while (_start && _start->next() && (_start->str() == "static" || _start->str() == "const"))
        _start = _start->next();
    while (_end && _end->previous() && _end->str() == "const")
        _end = _end->previous();

    if (_name)
        setFlag(fIsArray, arrayDimensions(_dimensions, _name->next()));
    if (_start) {
        setFlag(fIsClass, !_start->isStandardType() && !isPointer() && !isReference());
        setFlag(fIsStlType, Token::simpleMatch(_start, "std ::"));
    }
    if (_access == Argument) {
        tok = _name;
        if (!tok) {
            // Argument without name
            tok = _end;
            // back up to start of array dimensions
            while (tok && tok->str() == "]")
                tok = tok->link()->previous();
            // add array dimensions if present
            if (tok && tok->next()->str() == "[")
                setFlag(fIsArray, arrayDimensions(_dimensions, tok->next()));
        }
        if (!tok)
            return;
        tok = tok->next();
        while (tok->str() == "[")
            tok = tok->link();
        setFlag(fHasDefault, tok->str() == "=");
    }
    // check for C++11 member initialization
    if (_scope && _scope->isClassOrStruct()) {
        // type var = x; gets simplified to: type var ; var = x ;
        if (Token::Match(_name, "%var% ; %var% = %any% ;") && _name->strAt(2) == _name->str())
            setFlag(fHasDefault, true);
    }
}

bool Function::argsMatch(const Scope *scope, const Token *first, const Token *second, const std::string &path, unsigned int depth)
{
    const bool isCPP = scope->check->isCPP();

    // skip "struct" if it is C++
    if (isCPP) {
        if (first->str() == "struct")
            first = first->next();
        if (second->str() == "struct")
            second = second->next();
    }

    // skip const on type passed by value
    if (Token::Match(first, "const %type% %var%|,|)"))
        first = first->next();
    if (Token::Match(second, "const %type% %var%|,|)"))
        second = second->next();

    while (first->str() == second->str() &&
           first->isLong() == second->isLong() &&
           first->isUnsigned() == second->isUnsigned()) {
        // at end of argument list
        if (first->str() == ")") {
            return true;
        }

        // skip default value assignment
        else if (first->next()->str() == "=") {
            first = first->nextArgument();
            if (first)
                first = first->tokAt(-2);
            if (second->next()->str() == "=") {
                second = second->nextArgument();
                if (second)
                    second = second->tokAt(-2);
                if (!first || !second) { // End of argument list (first or second)
                    return !first && !second;
                }
            } else if (!first) { // End of argument list (first)
                return second->next() && second->next()->str() == ")";
            }
        } else if (second->next()->str() == "=") {
            second = second->nextArgument();
            if (second)
                second = second->tokAt(-2);
            if (!first || !second) { // End of argument list (first or second)
                return !first && !second;
            }
        }

        // definition missing variable name
        else if (first->next()->str() == "," && second->next()->str() != ",") {
            second = second->next();
            // skip default value assignment
            if (second->next()->str() == "=") {
                while (!Token::Match(second->next(), ",|)"))
                    second = second->next();
            }
        } else if (first->next()->str() == ")" && second->next()->str() != ")") {
            second = second->next();
            // skip default value assignment
            if (second->next()->str() == "=") {
                while (!Token::Match(second->next(), ",|)"))
                    second = second->next();
            }
        } else if (first->next()->str() == "[" && second->next()->str() != "[")
            second = second->next();

        // function missing variable name
        else if (second->next()->str() == "," && first->next()->str() != ",") {
            first = first->next();
            // skip default value assignment
            if (first->next()->str() == "=") {
                while (!Token::Match(first->next(), ",|)"))
                    first = first->next();
            }
        } else if (second->next()->str() == ")" && first->next()->str() != ")") {
            first = first->next();
            // skip default value assignment
            if (first->next()->str() == "=") {
                while (!Token::Match(first->next(), ",|)"))
                    first = first->next();
            }
        } else if (second->next()->str() == "[" && first->next()->str() != "[")
            first = first->next();

        // argument list has different number of arguments
        else if (second->str() == ")")
            break;

        // variable names are different
        else if ((Token::Match(first->next(), "%var% ,|)|=") &&
                  Token::Match(second->next(), "%var% ,|)")) &&
                 (first->next()->str() != second->next()->str())) {
            // skip variable names
            first = first->next();
            second = second->next();
        }

        // variable with class path
        else if (depth && Token::Match(first->next(), "%var%")) {
            std::string param = path + first->next()->str();

            if (Token::Match(second->next(), param.c_str())) {
                second = second->tokAt(int(depth) * 2);
            } else if (depth > 1) {
                std::string short_path = path;

                // remove last " :: "
                short_path.resize(short_path.size() - 4);

                // remove last name
                while (!short_path.empty() && short_path[short_path.size() - 1] != ' ')
                    short_path.resize(short_path.size() - 1);

                param = short_path + first->next()->str();
                if (Token::Match(second->next(), param.c_str())) {
                    second = second->tokAt((int(depth) - 1) * 2);
                }
            }
        }

        // nested class variable
        else if (depth == 0 && Token::Match(first->next(), "%var%") &&
                 second->next()->str() == scope->className && second->strAt(2) == "::" &&
                 first->next()->str() == second->strAt(3)) {
            second = second->tokAt(2);
        }

        first = first->next();
        second = second->next();

        // skip "struct" if it is C++
        if (isCPP) {
            if (first->str() == "struct")
                first = first->next();
            if (second->str() == "struct")
                second = second->next();
        }

        // skip const on type passed by value
        if (Token::Match(first, "const %type% %var%|,|)"))
            first = first->next();
        if (Token::Match(second, "const %type% %var%|,|)"))
            second = second->next();
    }

    return false;
}

Function* SymbolDatabase::addGlobalFunction(Scope*& scope, const Token*& tok, const Token *argStart, const Token* funcStart)
{
    Function* function = 0;
    for (std::list<Function>::iterator i = scope->functionList.begin(); i != scope->functionList.end(); ++i) {
        if (i->tokenDef->str() == tok->str() && Function::argsMatch(scope, i->argDef->next(), argStart->next(), "", 0)) {
            function = &*i;
            // copy attributes from function prototype to function
            const_cast<Token *>(tok)->isAttributeConstructor(i->tokenDef->isAttributeConstructor());
            const_cast<Token *>(tok)->isAttributeDestructor(i->tokenDef->isAttributeDestructor());
            const_cast<Token *>(tok)->isAttributePure(i->tokenDef->isAttributePure());
            const_cast<Token *>(tok)->isAttributeConst(i->tokenDef->isAttributeConst());
            const_cast<Token *>(tok)->isAttributeNothrow(i->tokenDef->isAttributeNothrow());
            const_cast<Token *>(tok)->isDeclspecNothrow(i->tokenDef->isDeclspecNothrow());
            break;
        }
    }

    if (!function)
        function = addGlobalFunctionDecl(scope, tok, argStart, funcStart);

    function->arg = argStart;
    function->token = funcStart;
    function->hasBody = true;

    addNewFunction(&scope, &tok);

    if (scope) {
        scope->function = function;
        function->functionScope = scope;
        return function;
    }
    return 0;
}

Function* SymbolDatabase::addGlobalFunctionDecl(Scope*& scope, const Token *tok, const Token *argStart, const Token* funcStart)
{
    Function function;

    // save the function definition argument start '('
    function.argDef = argStart;

    // save the access type
    function.access = Public;

    // save the function name location
    function.tokenDef = funcStart;

    function.isInline = false;
    function.hasBody = false;
    function.type = Function::eFunction;
    function.nestedIn = scope;

    const Token *tok1 = tok;

    // look for end of previous statement
    while (tok1->previous() && !Token::Match(tok1->previous(), ";|}|{"))
        tok1 = tok1->previous();

    // find the return type
    while (tok1 && Token::Match(tok1->next(), "static|const"))
        tok1 = tok1->next();

    if (tok1)
        function.retDef = tok1;

    scope->functionList.push_back(function);
    return &scope->functionList.back();
}

void SymbolDatabase::addClassFunction(Scope **scope, const Token **tok, const Token *argStart)
{
    int count = 0;
    std::string path;
    unsigned int path_length = 0;
    const Token *tok1;

    const bool destructor((*tok)->previous()->str() == "~");

    // skip class/struct name
    if (destructor)
        tok1 = (*tok)->tokAt(-3);
    else
        tok1 = (*tok)->tokAt(-2);

    // syntax error?
    if (!tok1)
        return;

    // back up to head of path
    while (tok1 && tok1->previous() && tok1->previous()->str() == "::" &&
           tok1->tokAt(-2) && tok1->tokAt(-2)->isName()) {
        path = tok1->str() + " :: " + path;
        tok1 = tok1->tokAt(-2);
        count++;
        path_length++;
    }

    if (tok1 && count) {
        path = tok1->str() + " :: " + path;
        path_length++;
    }

    std::list<Scope>::iterator it1;

    // search for match
    for (it1 = scopeList.begin(); it1 != scopeList.end(); ++it1) {
        Scope *scope1 = &(*it1);

        bool match = false;

        // check in namespace if using found
        if (*scope == scope1 && !scope1->usingList.empty()) {
            std::list<Scope::UsingInfo>::const_iterator it2;
            for (it2 = scope1->usingList.begin(); it2 != scope1->usingList.end(); ++it2) {
                if (it2->scope) {
                    Function * func = findFunctionInScope(tok1, it2->scope);
                    if (func) {
                        if (!func->hasBody) {
                            func->hasBody = true;
                            func->token = *tok;
                            func->arg = argStart;
                            addNewFunction(scope, tok);
                            if (*scope) {
                                (*scope)->functionOf = func->nestedIn;
                                (*scope)->function = &*func;
                                (*scope)->function->functionScope = *scope;
                            }
                            return;
                        }
                    }
                }
            }
        }

        if (scope1->className == tok1->str() && (scope1->type != Scope::eFunction)) {
            // do the scopes match (same scope) or do their names match (multiple namespaces)
            if ((*scope == scope1->nestedIn) || (*scope &&
                                                 (*scope)->className == scope1->nestedIn->className &&
                                                 !(*scope)->className.empty() &&
                                                 (*scope)->type == scope1->nestedIn->type)) {

                // nested scopes => check that they match
                {
                    const Scope *s1 = *scope;
                    const Scope *s2 = scope1->nestedIn;
                    while (s1 && s2) {
                        if (s1->className != s2->className)
                            break;
                        s1 = s1->nestedIn;
                        s2 = s2->nestedIn;
                    }
                    // Not matching scopes
                    if (s1 || s2)
                        continue;
                }

                Scope *scope2 = scope1;

                while (scope2 && count > 0) {
                    count--;
                    tok1 = tok1->tokAt(2);
                    scope2 = scope2->findInNestedList(tok1->str());
                }

                if (count == 0 && scope2) {
                    match = true;
                    scope1 = scope2;
                }
            }
        }

        if (match) {
            std::list<Function>::iterator func;

            for (func = scope1->functionList.begin(); func != scope1->functionList.end(); ++func) {
                if (!func->hasBody && func->tokenDef->str() == (*tok)->str()) {
                    if (Function::argsMatch(scope1, func->argDef, (*tok)->next(), path, path_length)) {
                        if (func->type == Function::eDestructor && destructor) {
                            func->hasBody = true;
                        } else if (func->type != Function::eDestructor && !destructor) {
                            // normal function?
                            if ((*tok)->next()->link()) {
                                if ((func->isConst && (*tok)->next()->link()->next()->str() == "const") ||
                                    (!func->isConst && (*tok)->next()->link()->next()->str() != "const")) {
                                    func->hasBody = true;
                                }
                            }
                        }

                        if (func->hasBody) {
                            func->token = *tok;
                            func->arg = argStart;
                            addNewFunction(scope, tok);
                            if (*scope) {
                                (*scope)->functionOf = scope1;
                                (*scope)->function = &*func;
                                (*scope)->function->functionScope = *scope;
                            }
                            return;
                        }
                    }
                }
            }
        }
    }

    // class function of unknown class
    addNewFunction(scope, tok);
}

void SymbolDatabase::addNewFunction(Scope **scope, const Token **tok)
{
    const Token *tok1 = *tok;
    scopeList.push_back(Scope(this, tok1, *scope));
    Scope *new_scope = &scopeList.back();

    // skip to start of function
    bool foundInitLit = false;
    while (tok1 && (tok1->str() != "{" || (foundInitLit && tok1->previous()->isName()))) {
        if (tok1->str() == "(" || tok1->str() == "{")
            tok1 = tok1->link();
        if (tok1->str() == ":")
            foundInitLit = true;
        tok1 = tok1->next();
    }

    if (tok1) {
        new_scope->classStart = tok1;
        new_scope->classEnd = tok1->link();

        // syntax error?
        if (!new_scope->classEnd) {
            scopeList.pop_back();
            while (tok1->next())
                tok1 = tok1->next();
            *scope = nullptr;
            *tok = tok1;
            return;
        }

        (*scope)->nestedList.push_back(new_scope);
        *scope = new_scope;
        *tok = tok1;
    } else {
        scopeList.pop_back();
        *scope = nullptr;
        *tok = nullptr;
    }
}

const Token *Type::initBaseInfo(const Token *tok, const Token *tok1)
{
    // goto initial '{'
    const Token *tok2 = tok1;
    while (tok2 && tok2->str() != "{") {
        // skip unsupported templates
        if (tok2->str() == "<")
            tok2 = tok2->link();

        // check for base classes
        else if (Token::Match(tok2, ":|,")) {
            Type::BaseInfo base;

            base.isVirtual = false;

            tok2 = tok2->next();

            // check for invalid code
            if (!tok2 || !tok2->next())
                return nullptr;

            if (tok2->str() == "virtual") {
                base.isVirtual = true;
                tok2 = tok2->next();
            }

            if (tok2->str() == "public") {
                base.access = Public;
                tok2 = tok2->next();
            } else if (tok2->str() == "protected") {
                base.access = Protected;
                tok2 = tok2->next();
            } else if (tok2->str() == "private") {
                base.access = Private;
                tok2 = tok2->next();
            } else {
                if (tok->str() == "class")
                    base.access = Private;
                else if (tok->str() == "struct")
                    base.access = Public;
            }

            if (tok2->str() == "virtual") {
                base.isVirtual = true;
                tok2 = tok2->next();
            }

            base.nameTok = tok2;

            // handle global namespace
            if (tok2->str() == "::") {
                tok2 = tok2->next();
            }

            // handle derived base classes
            while (Token::Match(tok2, "%var% ::")) {
                tok2 = tok2->tokAt(2);
            }

            base.name = tok2->str();
            base.type = nullptr;

            // add unhandled templates
            if (tok2->next() && tok2->next()->str() == "<") {
                tok2 = tok2->next();
                base.name += tok2->str();

                int level1 = 1;
                while (tok2->next()) {
                    base.name += tok2->next()->str();

                    if (tok2->next()->str() == ">") {
                        level1--;
                        if (level1 == 0)
                            break;
                    } else if (tok2->next()->str() == "<")
                        level1++;

                    tok2 = tok2->next();
                }
            }

            // save pattern for base class name
            derivedFrom.push_back(base);
        }
        if (tok2) // see #4806
            tok2 = tok2->next();
    }

    return tok2;
}

void SymbolDatabase::debugMessage(const Token *tok, const std::string &msg) const
{
    if (tok && _settings->debugwarnings) {
        const std::list<const Token*> locationList(1, tok);
        const ErrorLogger::ErrorMessage errmsg(locationList, &_tokenizer->list,
                                               Severity::debug,
                                               "debug",
                                               msg,
                                               false);
        if (_errorLogger)
            _errorLogger->reportErr(errmsg);
    }
}

const Function* Type::getFunction(const std::string& funcName) const
{
    if (classScope) {
        for (std::list<Function>::const_iterator i = classScope->functionList.begin(); i != classScope->functionList.end(); ++i)
            if (i->name() == funcName)
                return &*i;
    }

    for (std::size_t i = 0; i < derivedFrom.size(); i++) {
        if (derivedFrom[i].type) {
            const Function* func = derivedFrom[i].type->getFunction(funcName);
            if (func)
                return func;
        }
    }
    return 0;
}

bool Type::hasCircularDependencies(std::set<BaseInfo>* anchestors) const
{
    std::set<BaseInfo> knownAnchestors;
    if (!anchestors) {
        anchestors=&knownAnchestors;
    }
    for (std::vector<BaseInfo>::const_iterator parent=derivedFrom.begin(); parent!=derivedFrom.end(); ++parent) {
        if (!parent->type)
            continue;
        else if (this==parent->type)
            return true;
        else if (anchestors->find(*parent)!=anchestors->end())
            return true;
        else {
            anchestors->insert(*parent);
            if (parent->type->hasCircularDependencies(anchestors))
                return true;
        }
    }
    return false;
}

bool Variable::arrayDimensions(std::vector<Dimension> &dimensions, const Token *tok)
{
    bool isArray = false;

    const Token *dim = tok;

    while (dim && dim->next() && dim->str() == "[") {
        Dimension dimension;
        // check for empty array dimension []
        if (dim->next()->str() != "]") {
            dimension.start = dim->next();
            dimension.end = dim->link()->previous();
            if (dimension.start == dimension.end && dimension.start->isNumber())
                dimension.num = MathLib::toLongNumber(dimension.start->str());
        }
        dimensions.push_back(dimension);
        dim = dim->link()->next();
        isArray = true;
    }
    return isArray;
}

static std::ostream & operator << (std::ostream & s, Scope::ScopeType type)
{
    s << (type == Scope::eGlobal ? "Global" :
          type == Scope::eClass ? "Class" :
          type == Scope::eStruct ? "Struct" :
          type == Scope::eUnion ? "Union" :
          type == Scope::eNamespace ? "Namespace" :
          type == Scope::eFunction ? "Function" :
          type == Scope::eIf ? "If" :
          type == Scope::eElse ? "Else" :
          type == Scope::eElseIf ? "ElseIf" :
          type == Scope::eFor ? "For" :
          type == Scope::eWhile ? "While" :
          type == Scope::eDo ? "Do" :
          type == Scope::eSwitch ? "Switch" :
          type == Scope::eTry ? "Try" :
          type == Scope::eCatch ? "Catch" :
          type == Scope::eUnconditional ? "Unconditional" :
          "Unknown");
    return s;
}

void SymbolDatabase::printVariable(const Variable *var, const char *indent) const
{
    std::cout << indent << "_name: " << var->nameToken();
    if (var->nameToken()) {
        std::cout << " " << var->name() << " " << _tokenizer->list.fileLine(var->nameToken()) << std::endl;
        std::cout << indent << "    declarationId: " << var->declarationId() << std::endl;
    } else
        std::cout << std::endl;
    std::cout << indent << "_start: " << var->typeStartToken() << " " << var->typeStartToken()->str()
              << " " << _tokenizer->list.fileLine(var->typeStartToken()) << std::endl;
    std::cout << indent << "_end: " << var->typeEndToken() << " " << var->typeEndToken()->str()
              << " " << _tokenizer->list.fileLine(var->typeEndToken()) << std::endl;
    std::cout << indent << "_index: " << var->index() << std::endl;
    std::cout << indent << "_access: " <<
              (var->isPublic() ? "Public" :
               var->isProtected() ? "Protected" :
               var->isPrivate() ? "Private" :
               var->isGlobal() ? "Global" :
               var->isNamespace() ? "Namespace" :
               var->isArgument() ? "Argument" :
               var->isLocal() ? "Local" :
               var->isThrow() ? "Throw" :
               "???")  << std::endl;
    std::cout << indent << "_flags: " << std::endl;
    std::cout << indent << "    isMutable: " << (var->isMutable() ? "true" : "false") << std::endl;
    std::cout << indent << "    isStatic: " << (var->isStatic() ? "true" : "false") << std::endl;
    std::cout << indent << "    isExtern: " << (var->isExtern() ? "true" : "false") << std::endl;
    std::cout << indent << "    isLocal: " << (var->isLocal() ? "true" : "false") << std::endl;
    std::cout << indent << "    isConst: " << (var->isConst() ? "true" : "false") << std::endl;
    std::cout << indent << "    isClass: " << (var->isClass() ? "true" : "false") << std::endl;
    std::cout << indent << "    isArray: " << (var->isArray() ? "true" : "false") << std::endl;
    std::cout << indent << "    isPointer: " << (var->isPointer() ? "true" : "false") << std::endl;
    std::cout << indent << "    isReference: " << (var->isReference() ? "true" : "false") << std::endl;
    std::cout << indent << "    isRValueRef: " << (var->isRValueReference() ? "true" : "false") << std::endl;
    std::cout << indent << "    hasDefault: " << (var->hasDefault() ? "true" : "false") << std::endl;
    std::cout << indent << "    isStlType: " << (var->isStlType() ? "true" : "false") << std::endl;
    std::cout << indent << "_type: ";
    if (var->type()) {
        std::cout << var->type()->name();
        if (var->typeScope())
            std::cout << " " << var->typeScope()->type;
        std::cout << " " << _tokenizer->list.fileLine(var->type()->classDef) << std::endl;
    } else
        std::cout << "none" << std::endl;

    std::cout << indent << "_scope: ";
    if (var->scope()) {
        std::cout << var->scope()->className << " " << var->scope()->type;
        if (var->scope()->classDef)
            std::cout << " " << _tokenizer->list.fileLine(var->scope()->classDef) << std::endl;
        else
            std::cout << std::endl;
    } else
        std::cout << "none" << std::endl;

    std::cout << indent << "_dimensions:";
    for (std::size_t i = 0; i < var->dimensions().size(); i++) {
        std::cout << " " << var->dimension(i);
        if (!var->dimensions()[i].known)
            std::cout << "?";
    }
    std::cout << std::endl;
}

void SymbolDatabase::printOut(const char *title) const
{
    if (title)
        std::cout << "\n### " << title << " ###\n";

    for (std::list<Scope>::const_iterator scope = scopeList.begin(); scope != scopeList.end(); ++scope) {
        std::cout << "Scope: " << &*scope << std::endl;
        std::cout << "    type: " << scope->type << std::endl;
        std::cout << "    className: " << scope->className << std::endl;
        std::cout << "    classDef: " << scope->classDef;
        if (scope->classDef)
            std::cout << " " << scope->classDef->str() << " " << _tokenizer->list.fileLine(scope->classDef) << std::endl;
        else
            std::cout << std::endl;

        std::cout << "    classStart: " << scope->classStart;
        if (scope->classStart)
            std::cout << " " << scope->classStart->str() << " " << _tokenizer->list.fileLine(scope->classStart) << std::endl;
        else
            std::cout << std::endl;

        std::cout << "    classEnd: " << scope->classEnd;
        if (scope->classEnd)
            std::cout << " " << scope->classEnd->str() << " " <<  _tokenizer->list.fileLine(scope->classEnd) << std::endl;
        else
            std::cout << std::endl;

        std::list<Function>::const_iterator func;

        // find the function body if not implemented inline
        for (func = scope->functionList.begin(); func != scope->functionList.end(); ++func) {
            std::cout << "    Function: " << &*func << std::endl;
            std::cout << "        name: " << func->tokenDef->str() << " "
                      << _tokenizer->list.fileLine(func->tokenDef) << std::endl;
            std::cout << "        type: " << (func->type == Function::eConstructor? "Constructor" :
                                              func->type == Function::eCopyConstructor ? "CopyConstructor" :
                                              func->type == Function::eMoveConstructor ? "MoveConstructor" :
                                              func->type == Function::eOperatorEqual ? "OperatorEqual" :
                                              func->type == Function::eDestructor ? "Destructor" :
                                              func->type == Function::eFunction ? "Function" :
                                              "???") << std::endl;
            std::cout << "        access: " << (func->access == Public ? "Public" :
                                                func->access == Protected ? "Protected" :
                                                func->access == Private ? "Private" :
                                                "???")  << std::endl;
            std::cout << "        hasBody: " << (func->hasBody ? "true" : "false") << std::endl;
            std::cout << "        isInline: " << (func->isInline ? "true" : "false") << std::endl;
            std::cout << "        isConst: " << (func->isConst ? "true" : "false") << std::endl;
            std::cout << "        isVirtual: " << (func->isVirtual ? "true" : "false") << std::endl;
            std::cout << "        isPure: " << (func->isPure ? "true" : "false") << std::endl;
            std::cout << "        isStatic: " << (func->isStatic ? "true" : "false") << std::endl;
            std::cout << "        isFriend: " << (func->isFriend ? "true" : "false") << std::endl;
            std::cout << "        isExplicit: " << (func->isExplicit ? "true" : "false") << std::endl;
            std::cout << "        isDefault: " << (func->isDefault ? "true" : "false") << std::endl;
            std::cout << "        isDelete: " << (func->isDelete ? "true" : "false") << std::endl;
            std::cout << "        isNoExcept: " << (func->isNoExcept ? "true" : "false") << std::endl;
            std::cout << "        isThrow: " << (func->isThrow ? "true" : "false") << std::endl;
            std::cout << "        isOperator: " << (func->isOperator ? "true" : "false") << std::endl;
            std::cerr << "        isAttributeConst: " << (func->isAttributeConst() ? "true" : "false") << std::endl;
            std::cerr << "        isAttributePure: " << (func->isAttributePure() ? "true" : "false") << std::endl;
            std::cerr << "        isAttributeNothrow: " << (func->isAttributeNothrow() ? "true" : "false") << std::endl;
            std::cerr << "        isDeclspecNothrow: " << (func->isDeclspecNothrow() ? "true" : "false") << std::endl;
            std::cout << "        noexceptArg: " << (func->noexceptArg ? func->noexceptArg->str() : "none") << std::endl;
            std::cout << "        throwArg: " << (func->throwArg ? func->throwArg->str() : "none") << std::endl;
            std::cout << "        tokenDef: " << func->tokenDef->str() << " " <<_tokenizer->list.fileLine(func->tokenDef) << std::endl;
            std::cout << "        argDef: " << _tokenizer->list.fileLine(func->argDef) << std::endl;
            if (!func->isConstructor() && !func->isDestructor())
                std::cout << "        retDef: " << func->retDef->str() << " " <<_tokenizer->list.fileLine(func->retDef) << std::endl;
            std::cout << "        retType: " << func->retType << std::endl;
            if (func->hasBody) {
                std::cout << "        token: " << _tokenizer->list.fileLine(func->token) << std::endl;
                std::cout << "        arg: " << _tokenizer->list.fileLine(func->arg) << std::endl;
            }
            std::cout << "        nestedIn: ";
            if (func->nestedIn) {
                std::cout << func->nestedIn->className << " " << func->nestedIn->type;
                if (func->nestedIn->classDef)
                    std::cout << " " << _tokenizer->list.fileLine(func->nestedIn->classDef) << std::endl;
                else
                    std::cout << std::endl;
            } else
                std::cout << "Unknown" << std::endl;
            std::cout << "        functionScope: ";
            if (func->functionScope) {
                std::cout << func->functionScope->className << " "
                          <<  _tokenizer->list.fileLine(func->functionScope->classDef) << std::endl;
            } else
                std::cout << "Unknown" << std::endl;

            std::list<Variable>::const_iterator var;

            for (var = func->argumentList.begin(); var != func->argumentList.end(); ++var) {
                std::cout << "        Variable: " << &*var << std::endl;
                printVariable(&*var, "            ");
            }
        }

        std::list<Variable>::const_iterator var;

        for (var = scope->varlist.begin(); var != scope->varlist.end(); ++var) {
            std::cout << "    Variable: " << &*var << std::endl;
            printVariable(&*var, "        ");
        }

        std::cout << "    nestedIn: " << scope->nestedIn;
        if (scope->nestedIn) {
            std::cout << " " << scope->nestedIn->type << " "
                      << scope->nestedIn->className;
        }
        std::cout << std::endl;

        std::cout << "    definedType: " << scope->definedType << std::endl;

        std::cout << "    nestedList[" << scope->nestedList.size() << "] = (";

        std::list<Scope *>::const_iterator nsi;

        std::size_t count = scope->nestedList.size();
        for (nsi = scope->nestedList.begin(); nsi != scope->nestedList.end(); ++nsi) {
            std::cout << " " << (*nsi) << " " << (*nsi)->type << " " << (*nsi)->className;
            if (count-- > 1)
                std::cout << ",";
        }

        std::cout << " )" << std::endl;

        std::list<Scope::UsingInfo>::const_iterator use;

        for (use = scope->usingList.begin(); use != scope->usingList.end(); ++use) {
            std::cout << "    using: " << use->scope << " " << use->start->strAt(2);
            const Token *tok1 = use->start->tokAt(3);
            while (tok1 && tok1->str() == "::") {
                std::cout << "::" << tok1->strAt(1);
                tok1 = tok1->tokAt(2);
            }
            std::cout << " " << _tokenizer->list.fileLine(use->start) << std::endl;
        }

        std::cout << "    functionOf: " << scope->functionOf;
        if (scope->functionOf) {
            std::cout << " " << scope->functionOf->type << " " << scope->functionOf->className;
            if (scope->functionOf->classDef)
                std::cout << " " << _tokenizer->list.fileLine(scope->functionOf->classDef);
        }
        std::cout << std::endl;

        std::cout << "    function: " << scope->function;
        if (scope->function) {
            std::cout << " " << scope->function->tokenDef->str() << " "
                      << _tokenizer->list.fileLine(scope->function->tokenDef);
        }
        std::cout << std::endl;
    }

    for (std::list<Type>::const_iterator type = typeList.begin(); type != typeList.end(); ++type) {
        std::cout << "Type: " << &(*type) << std::endl;
        std::cout << "    name: " << type->name() << std::endl;
        std::cout << "    classDef: " << _tokenizer->list.fileLine(type->classDef) << std::endl;
        std::cout << "    classScope: " << type->classScope << std::endl;
        std::cout << "    enclosingScope: " << type->enclosingScope << std::endl;
        std::cout << "    needInitialization: " << (type->needInitialization == Type::Unknown ? "Unknown" :
                  type->needInitialization == Type::True ? "True" :
                  type->needInitialization == Type::False ? "False" :
                  "Invalid") << std::endl;

        std::cout << "    derivedFrom[" << type->derivedFrom.size() << "] = (";
        std::size_t count = type->derivedFrom.size();
        for (std::size_t i = 0; i < type->derivedFrom.size(); ++i) {
            if (type->derivedFrom[i].isVirtual)
                std::cout << "Virtual ";

            std::cout << (type->derivedFrom[i].access == Public    ? " Public" :
                          type->derivedFrom[i].access == Protected ? " Protected" :
                          type->derivedFrom[i].access == Private   ? " Private" :
                          " Unknown");

            if (type->derivedFrom[i].type)
                std::cout << " " << type->derivedFrom[i].type;
            else
                std::cout << " Unknown";

            std::cout << " " << type->derivedFrom[i].name;
            if (count-- > 1)
                std::cout << ",";
        }

        std::cout << " )" << std::endl;

        std::cout << "    friendList[" << type->friendList.size() << "] = (";

        std::list<Type::FriendInfo>::const_iterator fii;

        count = type->friendList.size();
        for (fii = type->friendList.begin(); fii != type->friendList.end(); ++fii) {
            if (fii->type)
                std::cout << fii->type;
            else
                std::cout << " Unknown";

            std::cout << " " << fii->name;
            if (count-- > 1)
                std::cout << ",";
        }

        std::cout << " )" << std::endl;
    }

    for (std::size_t i = 1; i < _variableList.size(); i++) {
        std::cout << "_variableList[" << i << "]: " << _variableList[i];
        if (_variableList[i]) {
            std::cout << " " << _variableList[i]->name() << " "
                      << _tokenizer->list.fileLine(_variableList[i]->nameToken());
        }
        std::cout << std::endl;
    }
}

//---------------------------------------------------------------------------

void Function::addArguments(const SymbolDatabase *symbolDatabase, const Scope *scope)
{
    // check for non-empty argument list "( ... )"
    const Token * start = arg ? arg : argDef;
    if (start && start->link() != start->next() && !Token::simpleMatch(start, "( void )")) {
        unsigned int count = 0;

        for (const Token* tok = start->next(); tok; tok = tok->next()) {
            const Token* startTok = tok;
            const Token* endTok   = nullptr;
            const Token* nameTok  = nullptr;

            if (tok->str() == "," || tok->str() == ")")
                return; // Syntax error

            do {
                if (tok->varId() != 0) {
                    nameTok = tok;
                    endTok = tok->previous();
                } else if (tok->str() == "[") {
                    // skip array dimension(s)
                    tok = tok->link();
                    while (tok->next()->str() == "[")
                        tok = tok->next()->link();
                } else if (tok->str() == "<") {
                    tok = tok->link();
                    if (!tok) // something is wrong so just bail out
                        return;
                }

                tok = tok->next();

                if (!tok) // something is wrong so just bail
                    return;
            } while (tok->str() != "," && tok->str() != ")" && tok->str() != "=");

            const Token *typeTok = startTok->tokAt(startTok->str() == "const" ? 1 : 0);
            if (typeTok->str() == "struct")
                typeTok = typeTok->next();

            // check for argument with no name or missing varid
            if (!endTok) {
                if (tok->previous()->isName()) {
                    if (tok->previous() != typeTok) {
                        nameTok = tok->previous();
                        endTok = nameTok->previous();

                        if (hasBody)
                            symbolDatabase->debugMessage(nameTok, "Function::addArguments found argument \'" + nameTok->str() + "\' with varid 0.");
                    } else
                        endTok = startTok;
                } else
                    endTok = tok->previous();
            }

            const ::Type *argType = nullptr;
            if (!typeTok->isStandardType()) {
                argType = symbolDatabase->findVariableType(scope, typeTok);
                if (!argType) {
                    // look for variable type in any using namespace in this scope or above
                    const Scope *parent = scope;
                    while (parent) {
                        for (std::list<Scope::UsingInfo>::const_iterator ui = scope->usingList.begin();
                             ui != scope->usingList.end(); ++ui) {
                            if (ui->scope) {
                                argType = symbolDatabase->findVariableType(ui->scope, typeTok);
                                if (argType)
                                    break;
                            }
                        }
                        parent = parent->nestedIn;
                    }
                }
            }

            // skip default values
            if (tok->str() == "=") {
                while (tok->str() != "," && tok->str() != ")") {
                    if (tok->link() && Token::Match(tok, "[{[(<]"))
                        tok = tok->link();
                    tok = tok->next();
                }
            }

            argumentList.push_back(Variable(nameTok, startTok, endTok, count++, Argument, argType, functionScope));

            if (tok->str() == ")")
                break;
        }

        // count default arguments
        for (const Token* tok = argDef->next(); tok && tok != argDef->link(); tok = tok->next()) {
            if (tok->str() == "=")
                initArgCount++;
        }
    }
}

bool Function::isImplicitlyVirtual(bool defaultVal) const
{
    if (isVirtual)
        return true;
    else if (access == Private || access == Public || access == Protected) {
        bool safe = true;
        bool hasVirt = isImplicitlyVirtual_rec(nestedIn->definedType, safe);
        if (hasVirt)
            return true;
        else if (safe)
            return false;
        else
            return defaultVal;
    } else
        return false;
}

bool Function::isImplicitlyVirtual_rec(const ::Type* baseType, bool& safe) const
{
    // check each base class
    for (std::size_t i = 0; i < baseType->derivedFrom.size(); ++i) {
        // check if base class exists in database
        if (baseType->derivedFrom[i].type && baseType->derivedFrom[i].type->classScope) {
            const Scope *parent = baseType->derivedFrom[i].type->classScope;

            std::list<Function>::const_iterator func;

            // check if function defined in base class
            for (func = parent->functionList.begin(); func != parent->functionList.end(); ++func) {
                if (func->isVirtual && func->tokenDef->str() == tokenDef->str()) { // Base is virtual and of same name
                    const Token *temp1 = func->tokenDef->previous();
                    const Token *temp2 = tokenDef->previous();
                    bool returnMatch = true;

                    // check for matching return parameters
                    while (temp1->str() != "virtual") {
                        if (temp1->str() != temp2->str()) {
                            returnMatch = false;
                            break;
                        }

                        temp1 = temp1->previous();
                        temp2 = temp2->previous();
                    }

                    // check for matching function parameters
                    if (returnMatch && argsMatch(baseType->classScope, func->argDef, argDef, "", 0)) {
                        return true;
                    }
                }
            }

            if (!baseType->derivedFrom[i].type->derivedFrom.empty() && !baseType->derivedFrom[i].type->hasCircularDependencies()) {
                // avoid endless recursion, see #5289 Crash: Stack overflow in isImplicitlyVirtual_rec when checking SVN and
                // #5590 with a loop within the class hierarchie.
                if (isImplicitlyVirtual_rec(baseType->derivedFrom[i].type, safe))  {
                    return true;
                }
            }
        } else {
            // unable to find base class so assume it has no virtual function
            safe = false;
            return false;
        }
    }
    return false;
}

const Variable* Function::getArgumentVar(std::size_t num) const
{
    for (std::list<Variable>::const_iterator i = argumentList.begin(); i != argumentList.end(); ++i) {
        if (i->index() == num)
            return (&*i);
        else if (i->index() > num)
            return 0;
    }
    return 0;
}


//---------------------------------------------------------------------------

Scope::Scope(const SymbolDatabase *check_, const Token *classDef_, const Scope *nestedIn_, ScopeType type_, const Token *start_) :
    check(check_),
    classDef(classDef_),
    classStart(start_),
    classEnd(start_->link()),
    nestedIn(nestedIn_),
    numConstructors(0),
    numCopyOrMoveConstructors(0),
    type(type_),
    definedType(nullptr),
    functionOf(nullptr),
    function(nullptr)
{
}

Scope::Scope(const SymbolDatabase *check_, const Token *classDef_, const Scope *nestedIn_) :
    check(check_),
    classDef(classDef_),
    classStart(nullptr),
    classEnd(nullptr),
    nestedIn(nestedIn_),
    numConstructors(0),
    numCopyOrMoveConstructors(0),
    definedType(nullptr),
    functionOf(nullptr),
    function(nullptr)
{
    const Token *nameTok = classDef;
    if (!classDef) {
        type = Scope::eGlobal;
    } else if (classDef->str() == "class") {
        type = Scope::eClass;
        nameTok = nameTok->next();
    } else if (classDef->str() == "struct") {
        type = Scope::eStruct;
        nameTok = nameTok->next();
    } else if (classDef->str() == "union") {
        type = Scope::eUnion;
        nameTok = nameTok->next();
    } else if (classDef->str() == "namespace") {
        type = Scope::eNamespace;
        nameTok = nameTok->next();
    } else {
        type = Scope::eFunction;
    }
    // skip over qualification if present
    if (nameTok && nameTok->str() == "::")
        nameTok = nameTok->next();
    while (nameTok && Token::Match(nameTok, "%type% ::"))
        nameTok = nameTok->tokAt(2);
    if (nameTok && nameTok->str() != "{") // anonymous and unnamed structs/unions don't have a name
        className = nameTok->str();
}

bool Scope::hasDefaultConstructor() const
{
    if (numConstructors) {
        std::list<Function>::const_iterator func;

        for (func = functionList.begin(); func != functionList.end(); ++func) {
            if (func->type == Function::eConstructor && func->argCount() == 0)
                return true;
        }
    }
    return false;
}

AccessControl Scope::defaultAccess() const
{
    switch (type) {
    case eGlobal:
        return Global;
    case eClass:
        return Private;
    case eStruct:
        return Public;
    case eUnion:
        return Public;
    case eNamespace:
        return Namespace;
    default:
        return Local;
    }
}

// Get variable list..
void Scope::getVariableList()
{
    AccessControl varaccess = defaultAccess();
    const Token *start;
    unsigned int level = 1;

    if (classStart)
        start = classStart->next();

    // global scope
    else if (className.empty())
        start = check->_tokenizer->tokens();

    // forward declaration
    else
        return;

    for (const Token *tok = start; tok; tok = tok->next()) {
        // end of scope?
        if (tok->str() == "}") {
            level--;
            if (level == 0)
                break;
        }

        // syntax error?
        else if (tok->next() == nullptr)
            break;

        // Is it a function?
        else if (tok->str() == "{") {
            tok = tok->link();
            // syntax error?
            if (!tok)
                return;
            continue;
        }

        // Is it a nested class or structure?
        else if (Token::Match(tok, "class|struct|union|namespace %type% :|{")) {
            tok = tok->tokAt(2);
            while (tok && tok->str() != "{")
                tok = tok->next();
            if (tok) {
                // skip implementation
                tok = tok->link();
                continue;
            } else
                break;
        } else if (Token::Match(tok, "struct|union {")) {
            if (Token::Match(tok->next()->link(), "} %var% ;|[")) {
                tok = tok->next()->link()->tokAt(2);
                continue;
            } else if (Token::simpleMatch(tok->next()->link(), "} ;")) {
                level++;
                tok = tok->next();
                continue;
            }
        }

        // Borland C++: Skip all variables in the __published section.
        // These are automatically initialized.
        else if (tok->str() == "__published:") {
            for (; tok; tok = tok->next()) {
                if (tok->str() == "{")
                    tok = tok->link();
                if (Token::Match(tok->next(), "private:|protected:|public:"))
                    break;
            }
            if (tok)
                continue;
            else
                break;
        }

        // "private:" "public:" "protected:" etc
        else if (tok->str() == "public:") {
            varaccess = Public;
            continue;
        } else if (tok->str() == "protected:") {
            varaccess = Protected;
            continue;
        } else if (tok->str() == "private:") {
            varaccess = Private;
            continue;
        }

        // Is it a forward declaration?
        else if (Token::Match(tok, "class|struct|union %var% ;")) {
            tok = tok->tokAt(2);
            continue;
        }

        // Borland C++: Ignore properties..
        else if (tok->str() == "__property")
            continue;

        // skip return and delete
        else if (Token::Match(tok, "return|delete")) {
            while (tok->next() &&
                   tok->next()->str() != ";" &&
                   tok->next()->str() != "}" /* ticket #4994 */) {
                tok = tok->next();
            }
            continue;
        }

        // Search for start of statement..
        else if (tok->previous() && !Token::Match(tok->previous(), ";|{|}|public:|protected:|private:"))
            continue;
        else if (Token::Match(tok, ";|{|}"))
            continue;
        else if (Token::Match(tok, "goto %var% ;")) {
            tok = tok->tokAt(2);
            continue;
        }

        tok = checkVariable(tok, varaccess);

        if (!tok)
            break;
    }
}

const Token *Scope::checkVariable(const Token *tok, AccessControl varaccess)
{
    // This is the start of a statement
    const Token *vartok = nullptr;
    const Token *typetok = nullptr;

    // Is it a throw..?
    if (Token::Match(tok, "throw %any% (") &&
        Token::simpleMatch(tok->linkAt(2), ") ;")) {
        return tok->linkAt(2);
    } else if ((Token::Match(tok, "throw %any% :: %any% (") &&
                Token::simpleMatch(tok->linkAt(4), ") ;"))) {
        return tok->linkAt(4);
    }

    // friend?
    if (Token::Match(tok, "friend %type%") && tok->next()->varId() == 0) {
        const Token *next = Token::findmatch(tok->tokAt(2), ";|{");
        if (next && next->str() == "{")
            next = next->link();
        return next;
    }

    // skip const|static|mutable|extern
    while (Token::Match(tok, "const|static|mutable|extern")) {
        tok = tok->next();
    }

    // the start of the type tokens does not include the above modifiers
    const Token *typestart = tok;

    if (Token::Match(tok, "struct|union")) {
        tok = tok->next();
    }

    if (tok && isVariableDeclaration(tok, vartok, typetok)) {
        // If the vartok was set in the if-blocks above, create a entry for this variable..
        tok = vartok->next();
        while (tok && tok->str() == "[")
            tok = tok->link()->next();

        if (vartok->varId() == 0) {
            if (!vartok->isBoolean())
                check->debugMessage(vartok, "Scope::checkVariable found variable \'" + vartok->str() + "\' with varid 0.");
            return tok;
        }

        const Type *vType = nullptr;

        if (typetok) {
            vType = check->findVariableType(this, typetok);
            if (!vType) {
                // look for variable type in any using namespace in this scope or above
                const Scope *parent = this;
                while (parent) {
                    for (std::list<Scope::UsingInfo>::const_iterator ui = parent->usingList.begin();
                         ui != parent->usingList.end(); ++ui) {
                        if (ui->scope) {
                            vType = check->findVariableType(ui->scope, typetok);
                            if (vType)
                                break;
                        }
                    }
                    parent = parent->nestedIn;
                }
            }
        }

        addVariable(vartok, typestart, vartok->previous(), varaccess, vType, this);
    }

    return tok;
}

const Variable *Scope::getVariable(const std::string &varname) const
{
    std::list<Variable>::const_iterator iter;

    for (iter = varlist.begin(); iter != varlist.end(); ++iter) {
        if (iter->name() == varname)
            return &*iter;
    }

    return nullptr;
}

static const Token* skipScopeIdentifiers(const Token* tok)
{
    if (tok && tok->str() == "::") {
        tok = tok->next();
    }
    while (Token::Match(tok, "%type% ::")) {
        tok = tok->tokAt(2);
    }

    return tok;
}

static const Token* skipPointers(const Token* tok)
{
    while (Token::Match(tok, "*|&|&&")  || (tok && tok->str() == "(" && Token::Match(tok->link()->next(), "(|["))) {
        tok = tok->next();
        if (tok->strAt(-1) == "(" && Token::Match(tok, "%type% ::"))
            tok = tok->tokAt(2);
    }

    return tok;
}

bool Scope::isVariableDeclaration(const Token* tok, const Token*& vartok, const Token*& typetok) const
{
    if (tok && (tok->str() == "throw" || tok->str() == "new") && check->_tokenizer->isCPP())
        return false;

    const Token* localTypeTok = skipScopeIdentifiers(tok);
    const Token* localVarTok = nullptr;

    if (Token::Match(localTypeTok, "%type% <")) {
        const Token* closeTok = localTypeTok->next()->link();
        if (closeTok) {
            localVarTok = skipPointers(closeTok->next());

            if (Token::Match(localVarTok, ":: %type% %var% ;|=|(")) {
                if (localVarTok->strAt(3) != "(" ||
                    Token::simpleMatch(localVarTok->linkAt(3), ") ;")) {
                    localTypeTok = localVarTok->next();
                    localVarTok = localVarTok->tokAt(2);
                }
            }
        }
    } else if (Token::Match(localTypeTok, "%type%")) {
        localVarTok = skipPointers(localTypeTok->strAt(1)=="const"?localTypeTok->tokAt(2):localTypeTok->next());
    }

    if (localVarTok && localVarTok->str() == "const")
        localVarTok = localVarTok->next();

    if (Token::Match(localVarTok, "%var% ;|=")) {
        vartok = localVarTok;
        typetok = localTypeTok;
    } else if (Token::Match(localVarTok, "%var% )|[") && localVarTok->str() != "operator") {
        vartok = localVarTok;
        typetok = localTypeTok;
    } else if ((isLocal() || type == Scope::eFunction) &&
               Token::Match(localVarTok, "%var% (") &&
               Token::simpleMatch(localVarTok->next()->link(), ") ;") && localVarTok->varId()) {
        vartok = localVarTok;
        typetok = localTypeTok;
    } else if (type == eCatch &&
               Token::Match(localVarTok, "%var% )")) {
        vartok = localVarTok;
        typetok = localTypeTok;
    }

    return nullptr != vartok;
}



//---------------------------------------------------------------------------

const Type* SymbolDatabase::findVariableType(const Scope *start, const Token *typeTok) const
{
    std::list<Type>::const_iterator type;

    for (type = typeList.begin(); type != typeList.end(); ++type) {
        // do the names match?
        if (type->name() == typeTok->str()) {
            // check if type does not have a namespace
            if (typeTok->strAt(-1) != "::") {
                const Scope *parent = start;

                // check if in same namespace
                while (parent) {
                    // out of line class function belongs to class
                    if (parent->type == Scope::eFunction && parent->functionOf)
                        parent = parent->functionOf;
                    else if (parent != type->enclosingScope)
                        parent = parent->nestedIn;
                    else
                        break;
                }

                if (type->enclosingScope == parent)
                    return &(*type);
            }

            // type has a namespace
            else {
                // FIXME check if namespace path matches supplied path
                return &(*type);
            }
        }
    }

    return nullptr;
}

//---------------------------------------------------------------------------

/** @todo This function only counts the number of arguments in the function call.
    It does not take into account function constantness.
    It does not take into account argument types.  This can be difficult because of promotion and conversion operators and casts and because the argument can also be a function call.
 */
const Function* Scope::findFunction(const Token *tok) const
{
    for (std::list<Function>::const_iterator i = functionList.begin(); i != functionList.end(); ++i) {
        if (i->tokenDef->str() == tok->str()) {
            const Function *func = &*i;
            if ((tok->strAt(1) == "(" || (func->name() == tok->str() && tok->strAt(1) == "{" && func->type == Function::eConstructor)) && tok->tokAt(2)) {
                std::string end(tok->strAt(1) == "{" ? "}" : ")");
                // check the arguments
                unsigned int args = 0;
                const Token *arg = tok->tokAt(2);
                while (arg && arg->str() != end) {
                    /** @todo check argument type for match */

                    // mismatch parameter: passing parameter by address to function, argument is reference
                    if (arg->str() == "&") {
                        // check that function argument type is not mismatching
                        const Variable *funcarg = func->getArgumentVar(args);
                        if (funcarg && funcarg->isReference()) {
                            args = ~0U;
                            break;
                        }
                    }

                    args++;
                    arg = arg->nextArgument();
                }

                // check for argument count match or default arguments
                if (args == func->argCount() ||
                    (args < func->argCount() && args >= func->minArgCount()))
                    return func;
            }
        }
    }

    // check in base classes
    if (isClassOrStruct() && definedType && !definedType->derivedFrom.empty()) {
        for (std::size_t i = 0; i < definedType->derivedFrom.size(); ++i) {
            const Type *base = definedType->derivedFrom[i].type;
            if (base && base->classScope) {
                if (base->classScope == this) // Ticket #5120, #5125: Recursive class; tok should have been found already
                    continue;
                const Function * func = base->classScope->findFunction(tok);
                if (func)
                    return func;
            }
        }
    }

    return 0;
}

//---------------------------------------------------------------------------

const Function* SymbolDatabase::findFunction(const Token *tok) const
{
    // find the scope this function is in
    const Scope *currScope = tok->scope();
    while (currScope && currScope->isExecutable()) {
        if (currScope->functionOf)
            currScope = currScope->functionOf;
        else
            currScope = currScope->nestedIn;
    }

    // check for a qualified name and use it when given
    if (tok->strAt(-1) == "::") {
        // find start of qualified function name
        const Token *tok1 = tok;

        while (Token::Match(tok1->tokAt(-2), "%type% ::"))
            tok1 = tok1->tokAt(-2);

        // check for global scope
        if (tok1->strAt(-1) == "::") {
            currScope = &scopeList.front();

            currScope = currScope->findRecordInNestedList(tok1->str());
        }

        // find start of qualification
        else {
            while (currScope) {
                if (currScope->className == tok1->str())
                    break;
                else {
                    const Scope *scope = currScope->findRecordInNestedList(tok1->str());

                    if (scope) {
                        currScope = scope;
                        break;
                    } else
                        currScope = currScope->nestedIn;
                }
            }
        }

        if (currScope) {
            while (currScope && !Token::Match(tok1, "%type% :: %any% (")) {
                currScope = currScope->findRecordInNestedList(tok1->strAt(2));
                tok1 = tok1->tokAt(2);
            }

            tok1 = tok1->tokAt(2);

            if (currScope && tok1)
                return currScope->findFunction(tok1);
        }
    }

    // check for member function
    else if (Token::Match(tok->tokAt(-2), "!!this .")) {
        if (Token::Match(tok->tokAt(-2), "%var% .")) {
            const Token *tok1 = tok->tokAt(-2);

            if (tok1->varId()) {
                const Variable *var = getVariableFromVarId(tok1->varId());
                if (var && var->typeScope())
                    return var->typeScope()->findFunction(tok);
            }
        }
    }

    // check in enclosing scopes
    else {
        while (currScope) {
            const Function *func = currScope->findFunction(tok);
            if (func)
                return func;
            currScope = currScope->nestedIn;
        }
    }
    return 0;
}

//---------------------------------------------------------------------------

const Scope *SymbolDatabase::findScopeByName(const std::string& name) const
{
    for (std::list<Scope>::const_iterator it = scopeList.begin(); it != scopeList.end(); ++it) {
        if (it->className == name)
            return &*it;
    }
    return 0;
}

//---------------------------------------------------------------------------

Scope *Scope::findInNestedList(const std::string & name)
{
    std::list<Scope *>::iterator it;

    for (it = nestedList.begin(); it != nestedList.end(); ++it) {
        if ((*it)->className == name)
            return (*it);
    }
    return 0;
}

//---------------------------------------------------------------------------

const Scope *Scope::findRecordInNestedList(const std::string & name) const
{
    std::list<Scope *>::const_iterator it;

    for (it = nestedList.begin(); it != nestedList.end(); ++it) {
        if ((*it)->className == name && (*it)->type != eFunction)
            return (*it);
    }
    return 0;
}

//---------------------------------------------------------------------------

const Type* Scope::findType(const std::string & name) const
{
    std::list<Type*>::const_iterator it;

    for (it = definedTypes.begin(); it != definedTypes.end(); ++it) {
        if ((*it)->name() == name)
            return (*it);
    }
    return 0;
}

//---------------------------------------------------------------------------

Scope *Scope::findInNestedListRecursive(const std::string & name)
{
    std::list<Scope *>::iterator it;

    for (it = nestedList.begin(); it != nestedList.end(); ++it) {
        if ((*it)->className == name)
            return (*it);
    }

    for (it = nestedList.begin(); it != nestedList.end(); ++it) {
        Scope *child = (*it)->findInNestedListRecursive(name);
        if (child)
            return child;
    }
    return 0;
}

//---------------------------------------------------------------------------

const Function *Scope::getDestructor() const
{
    std::list<Function>::const_iterator it;
    for (it = functionList.begin(); it != functionList.end(); ++it) {
        if (it->type == Function::eDestructor)
            return &(*it);
    }
    return 0;
}

//---------------------------------------------------------------------------

unsigned int Scope::getNestedNonFunctions() const
{
    unsigned int nested = 0;
    std::list<Scope *>::const_iterator ni;
    for (ni = nestedList.begin(); ni != nestedList.end(); ++ni) {
        if ((*ni)->type != Scope::eFunction)
            nested++;
    }
    return nested;
}

//---------------------------------------------------------------------------

bool SymbolDatabase::isCPP() const
{
    return _tokenizer->isCPP();
}

//---------------------------------------------------------------------------

const Scope *SymbolDatabase::findScope(const Token *tok, const Scope *startScope) const
{
    const Scope *scope = nullptr;
    // absolute path
    if (tok->str() == "::") {
        tok = tok->next();
        scope = &scopeList.front();
    }
    // relative path
    else if (tok->isName()) {
        scope = startScope;
    }

    while (scope && tok && tok->isName()) {
        if (tok->strAt(1) == "::") {
            scope = scope->findRecordInNestedList(tok->str());
            tok = tok->tokAt(2);
        } else
            return scope->findRecordInNestedList(tok->str());
    }

    // not a valid path
    return 0;
}

//---------------------------------------------------------------------------

const Type* SymbolDatabase::findType(const Token *startTok, const Scope *startScope) const
{
    // skip over struct or union
    if (Token::Match(startTok, "struct|union"))
        startTok = startTok->next();

    // type same as scope
    if (startTok->str() == startScope->className && startScope->isClassOrStruct())
        return startScope->definedType;

    // absolute path - directly start in global scope
    if (startTok->str() == "::") {
        startTok = startTok->next();
        startScope = &scopeList.front();
    }

    const Token* tok = startTok;
    const Scope* scope = startScope;

    while (scope && tok && tok->isName()) {
        if (tok->strAt(1) == "::") {
            scope = scope->findRecordInNestedList(tok->str());
            if (scope) {
                tok = tok->tokAt(2);
            } else {
                startScope = startScope->nestedIn;
                if (!startScope)
                    break;
                scope = startScope;
                tok = startTok;
            }
        } else
            return scope->findType(tok->str());
    }

    // not a valid path
    return 0;
}

//---------------------------------------------------------------------------

const Type* SymbolDatabase::findTypeInNested(const Token *startTok, const Scope *startScope) const
{
    // skip over struct or union
    if (Token::Match(startTok, "struct|union"))
        startTok = startTok->next();

    // type same as scope
    if (startTok->str() == startScope->className && startScope->isClassOrStruct())
        return startScope->definedType;

    bool hasPath = false;

    // absolute path - directly start in global scope
    if (startTok->str() == "::") {
        hasPath = true;
        startTok = startTok->next();
        startScope = &scopeList.front();
    }

    const Token* tok = startTok;
    const Scope* scope = startScope;

    while (scope && tok && tok->isName()) {
        if (tok->strAt(1) == "::") {
            hasPath = true;
            scope = scope->findRecordInNestedList(tok->str());
            if (scope) {
                tok = tok->tokAt(2);
            } else {
                startScope = startScope->nestedIn;
                if (!startScope)
                    break;
                scope = startScope;
                tok = startTok;
            }
        } else {
            const Type * type = scope->findType(tok->str());
            if (hasPath || type)
                return type;
            else {
                scope = scope->nestedIn;
                if (!scope)
                    break;
            }
        }
    }

    // not a valid path
    return 0;
}

//---------------------------------------------------------------------------

const Scope * SymbolDatabase::findNamespace(const Token * tok, const Scope * scope) const
{
    const Scope * s = findScope(tok, scope);

    if (s)
        return s;
    else if (scope->nestedIn)
        return findNamespace(tok, scope->nestedIn);

    return 0;
}

//---------------------------------------------------------------------------

Function * SymbolDatabase::findFunctionInScope(const Token *func, const Scope *ns)
{
    const Function * function = nullptr;

    std::list<Function>::const_iterator it;

    for (it = ns->functionList.begin(); it != ns->functionList.end(); ++it) {
        if (it->name() == func->str()) {
            if (Function::argsMatch(ns, func->tokAt(2), it->argDef->next(), "", 0)) {
                function = &*it;
                break;
            }
        }
    }

    if (!function) {
        const Scope * scope = ns->findRecordInNestedList(func->str());
        if (scope && func->strAt(1) == "::") {
            function = findFunctionInScope(func->tokAt(2), scope);
        }
    }

    return const_cast<Function *>(function);
}