278 lines
9.7 KiB
C++
278 lines
9.7 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2018 Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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//---------------------------------------------------------------------------
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#ifndef templatesimplifierH
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#define templatesimplifierH
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//---------------------------------------------------------------------------
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#include "config.h"
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#include <ctime>
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#include <list>
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#include <map>
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#include <set>
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#include <string>
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#include <vector>
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class ErrorLogger;
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class Settings;
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class Token;
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class Tokenizer;
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class TokenList;
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/// @addtogroup Core
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/// @{
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/** @brief Simplify templates from the preprocessed and partially simplified code. */
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class CPPCHECKLIB TemplateSimplifier {
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public:
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TemplateSimplifier(TokenList &tokenlist, const Settings *settings, ErrorLogger *errorLogger);
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~TemplateSimplifier();
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/**
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* Used after simplifyTemplates to perform a little cleanup.
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* Sometimes the simplifyTemplates isn't fully successful and then
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* there are function calls etc with "wrong" syntax.
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*/
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void cleanupAfterSimplify();
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/**
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*/
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void checkComplicatedSyntaxErrorsInTemplates();
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/**
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* is the token pointing at a template parameters block
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* < int , 3 > => yes
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* \param tok start token that must point at "<"
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* \return number of parameters (invalid parameters => 0)
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*/
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static unsigned int templateParameters(const Token *tok);
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/**
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* Token and its full scopename
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*/
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struct TokenAndName {
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TokenAndName(Token *tok, const std::string &s, const std::string &n, const Token *nt);
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bool operator == (const TokenAndName & rhs) const {
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return token == rhs.token && scope == rhs.scope && name == rhs.name && nameToken == rhs.nameToken;
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}
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Token *token;
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std::string scope;
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std::string name;
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const Token *nameToken;
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};
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/**
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* Match template declaration/instantiation
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* @param instance template instantiation
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* @param numberOfArguments number of template arguments
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* @param patternAfter pattern that must match the tokens after the ">"
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* @return match => true
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*/
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static bool instantiateMatch(const Token *instance, const std::size_t numberOfArguments, const char patternAfter[]);
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/**
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* Match template declaration/instantiation
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* @param tok The ">" token e.g. before "class"
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* @param forward declaration or forward declaration
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* @return -1 to bail out or positive integer to identity the position
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* of the template name.
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*/
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static int getTemplateNamePosition(const Token *tok, bool forward = false);
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/**
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* Simplify templates
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* @param maxtime time when the simplification should be stopped
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* @param codeWithTemplates output parameter that is set if code contains templates
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*/
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void simplifyTemplates(
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const std::time_t maxtime,
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bool &codeWithTemplates);
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/**
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* Simplify constant calculations such as "1+2" => "3"
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* @param tok start token
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* @return true if modifications to token-list are done.
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* false if no modifications are done.
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*/
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static bool simplifyNumericCalculations(Token *tok);
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/**
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* Simplify constant calculations such as "1+2" => "3".
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* This also performs simple cleanup of parentheses etc.
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* @return true if modifications to token-list are done.
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* false if no modifications are done.
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*/
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bool simplifyCalculations();
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private:
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/**
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* Get template declarations
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* @return true if code has templates.
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*/
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bool getTemplateDeclarations();
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/**
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* Get template instantiations
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*/
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void getTemplateInstantiations();
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/**
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* Fix forward declared default argument values by copying them
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* when they are not present in the declaration.
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*/
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void fixForwardDeclaredDefaultArgumentValues();
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/**
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* simplify template instantiations (use default argument values)
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*/
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void useDefaultArgumentValues();
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/**
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* simplify template aliases
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*/
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void simplifyTemplateAliases();
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/**
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* Simplify templates : expand all instantiations for a template
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* @todo It seems that inner templates should be instantiated recursively
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* @param templateDeclaration template declaration
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* @param specializations template specializations (list each template name token)
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* @param maxtime time when the simplification will stop
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* @param expandedtemplates all templates that has been expanded so far. The full names are stored.
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* @return true if the template was instantiated
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*/
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bool simplifyTemplateInstantiations(
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const TokenAndName &templateDeclaration,
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const std::list<const Token *> &specializations,
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const std::time_t maxtime,
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std::set<std::string> &expandedtemplates);
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/**
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* Simplify templates : add namespace to template name
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* @param templateDeclaration template declaration
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* @param tok place to insert namespace
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*/
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void addNamespace(const TokenAndName &templateDeclaration, const Token *tok);
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/**
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* Simplify templates : check if namespace already present
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* @param templateDeclaration template declaration
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* @param tok place to start looking for namespace
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* @return true if namespace already present
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*/
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bool alreadyHasNamespace(const TokenAndName &templateDeclaration, const Token *tok) const;
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/**
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* Expand a template. Create "expanded" class/function at end of tokenlist.
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* @param templateDeclaration Template declaration information
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* @param templateDeclarationToken Template declaration token
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* @param templateInstantiation Full name of template
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* @param typeParametersInDeclaration The type parameters of the template
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* @param newName New name of class/function.
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* @param copy copy or expand in place
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*/
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void expandTemplate(
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const TokenAndName &templateDeclaration,
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const Token *templateDeclarationToken,
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const TokenAndName &templateInstantiation,
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const std::vector<const Token *> &typeParametersInDeclaration,
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const std::string &newName,
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bool copy);
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/**
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* Replace all matching template usages 'Foo < int >' => 'Foo<int>'
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* @param instantiationToken Template instantiation token
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* @param templateName full template name with scope info
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* @param typeStringsUsedInTemplateInstantiation template parameters. list of token strings.
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* @param newName The new type name
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*/
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void replaceTemplateUsage(Token *const instantiationToken,
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const std::string &templateName,
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const std::list<std::string> &typeStringsUsedInTemplateInstantiation,
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const std::string &newName);
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/**
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* @brief TemplateParametersInDeclaration
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* @param tok template < typename T, typename S >
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* ^ tok
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* @param typeParametersInDeclaration template < typename T, typename S >
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* ^ [0] ^ [1]
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* @return template < typename T, typename S >
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* ^ return
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*/
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static const Token * getTemplateParametersInDeclaration(
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const Token * tok,
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std::vector<const Token *> & typeParametersInDeclaration);
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/**
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* Remove a specific "template < ..." template class/function
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*/
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bool removeTemplate(Token *tok);
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/** Syntax error */
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static void syntaxError(const Token *tok);
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static bool matchSpecialization(
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const Token *templateDeclarationNameToken,
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const Token *templateInstantiationNameToken,
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const std::list<const Token *> & specializations);
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/*
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* Same as Token::eraseTokens() but tries to fix up lists with pointers to the deleted tokens.
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* @param begin Tokens after this will be erased.
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* @param end Tokens before this will be erased.
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*/
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void eraseTokens(Token *begin, const Token *end);
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/**
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* Delete specified token without invalidating pointer to following token.
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* tok will be invalidated.
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* @param tok token to delete
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*/
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static void deleteToken(Token *tok);
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/**
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* Get the new token name.
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* @param tok name token
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* @param &typeStringsUsedInTemplateInstantiation type strings use in template instantiation
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* @return new token name
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*/
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std::string getNewName(
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Token *tok2,
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std::list<std::string> &typeStringsUsedInTemplateInstantiation);
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TokenList &mTokenList;
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const Settings *mSettings;
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ErrorLogger *mErrorLogger;
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std::list<TokenAndName> mTemplateDeclarations;
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std::list<TokenAndName> mTemplateForwardDeclarations;
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std::map<Token *, Token *> mTemplateForwardDeclarationsMap;
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std::list<TokenAndName> mTemplateInstantiations;
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std::list<TokenAndName> mInstantiatedTemplates;
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std::list<TokenAndName> mMemberFunctionsToDelete;
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std::vector<Token *> mTypesUsedInTemplateInstantiation;
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};
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/// @}
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//---------------------------------------------------------------------------
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#endif // templatesimplifierH
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