1817 lines
71 KiB
C++
1817 lines
71 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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#include "templatesimplifier.h"
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#include "errorlogger.h"
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#include "mathlib.h"
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#include "settings.h"
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#include "token.h"
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#include "tokenize.h"
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#include "tokenlist.h"
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#include <algorithm>
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#include <cassert>
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#include <iostream>
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#include <stack>
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#include <utility>
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namespace {
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class FindToken {
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public:
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explicit FindToken(const Token *t) : token(t) {}
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bool operator()(const TemplateSimplifier::TokenAndName &t) const {
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return t.token == token;
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}
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private:
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const Token * const token;
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};
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class FindName {
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public:
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explicit FindName(const std::string &s) : name(s) {}
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bool operator()(const TemplateSimplifier::TokenAndName &t) const {
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return t.name == name;
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}
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private:
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const std::string name;
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};
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}
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void TemplateSimplifier::cleanupAfterSimplify(Token *tokens)
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{
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bool goback = false;
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for (Token *tok = tokens; tok; tok = tok->next()) {
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if (goback) {
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tok = tok->previous();
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goback = false;
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}
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if (tok->str() == "(")
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tok = tok->link();
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else if (Token::Match(tok, "template < > %name%")) {
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const Token *end = tok;
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while (end) {
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if (end->str() == ";")
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break;
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if (end->str() == "{") {
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end = end->link()->next();
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break;
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}
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if (!Token::Match(end, "%name%|::|<|>|,")) {
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end = nullptr;
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break;
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}
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end = end->next();
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}
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if (end) {
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Token::eraseTokens(tok,end);
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tok->deleteThis();
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}
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}
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else if (Token::Match(tok, "%type% <") &&
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(!tok->previous() || tok->previous()->str() == ";")) {
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const Token *tok2 = tok->tokAt(2);
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std::string type;
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while (Token::Match(tok2, "%type%|%num% ,")) {
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type += tok2->str() + ",";
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tok2 = tok2->tokAt(2);
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}
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if (Token::Match(tok2, "%type%|%num% > (")) {
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type += tok2->str();
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tok->str(tok->str() + "<" + type + ">");
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Token::eraseTokens(tok, tok2->tokAt(2));
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if (tok == tokens)
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goback = true;
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}
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}
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}
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}
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void TemplateSimplifier::checkComplicatedSyntaxErrorsInTemplates(const Token *tokens)
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{
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// check for more complicated syntax errors when using templates..
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for (const Token *tok = tokens; tok; tok = tok->next()) {
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// skip executing scopes (ticket #3183)..
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if (Token::simpleMatch(tok, "( {")) {
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tok = tok->link();
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if (!tok)
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syntaxError(nullptr);
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}
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// skip executing scopes..
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const Token *start = Tokenizer::startOfExecutableScope(tok);
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if (start) {
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tok = start->link();
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}
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// skip executing scopes (ticket #1985)..
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else if (Token::simpleMatch(tok, "try {")) {
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tok = tok->next()->link();
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while (Token::simpleMatch(tok, "} catch (")) {
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tok = tok->linkAt(2);
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if (Token::simpleMatch(tok, ") {"))
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tok = tok->next()->link();
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}
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}
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if (!tok)
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syntaxError(nullptr);
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// not start of statement?
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if (tok->previous() && !Token::Match(tok, "[;{}]"))
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continue;
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// skip starting tokens.. ;;; typedef typename foo::bar::..
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while (Token::simpleMatch(tok, ";"))
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tok = tok->next();
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while (Token::Match(tok, "typedef|typename"))
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tok = tok->next();
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while (Token::Match(tok, "%type% ::"))
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tok = tok->tokAt(2);
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if (!tok)
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break;
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// template variable or type..
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if (Token::Match(tok, "%type% <")) {
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// these are used types..
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std::set<std::string> usedtypes;
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// parse this statement and see if the '<' and '>' are matching
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unsigned int level = 0;
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for (const Token *tok2 = tok; tok2 && !Token::Match(tok2, "[;{}]"); tok2 = tok2->next()) {
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if (tok2->str() == "(")
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tok2 = tok2->link();
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else if (tok2->str() == "<") {
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bool inclevel = false;
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if (Token::simpleMatch(tok2->previous(), "operator <"))
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;
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else if (level == 0)
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inclevel = true;
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else if (tok2->next() && tok2->next()->isStandardType())
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inclevel = true;
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else if (Token::simpleMatch(tok2, "< typename"))
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inclevel = true;
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else if (Token::Match(tok2->tokAt(-2), "<|, %type% <") && usedtypes.find(tok2->previous()->str()) != usedtypes.end())
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inclevel = true;
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else if (Token::Match(tok2, "< %type%") && usedtypes.find(tok2->next()->str()) != usedtypes.end())
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inclevel = true;
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else if (Token::Match(tok2, "< %type%")) {
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// is the next token a type and not a variable/constant?
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// assume it's a type if there comes another "<"
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const Token *tok3 = tok2->next();
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while (Token::Match(tok3, "%type% ::"))
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tok3 = tok3->tokAt(2);
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if (Token::Match(tok3, "%type% <"))
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inclevel = true;
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}
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if (inclevel) {
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++level;
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if (Token::Match(tok2->tokAt(-2), "<|, %type% <"))
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usedtypes.insert(tok2->previous()->str());
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}
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} else if (tok2->str() == ">") {
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if (level > 0)
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--level;
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} else if (tok2->str() == ">>") {
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if (level > 0)
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--level;
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if (level > 0)
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--level;
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}
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}
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if (level > 0)
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syntaxError(tok);
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}
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}
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}
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unsigned int TemplateSimplifier::templateParameters(const Token *tok)
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{
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unsigned int numberOfParameters = 1;
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if (!tok)
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return 0;
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if (tok->str() != "<")
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return 0;
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tok = tok->next();
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unsigned int level = 0;
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while (tok) {
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// skip const/volatile
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if (Token::Match(tok, "const|volatile"))
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tok = tok->next();
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// skip struct/union
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if (Token::Match(tok, "struct|union"))
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tok = tok->next();
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// Skip '&'
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if (Token::Match(tok, "& ::| %name%"))
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tok = tok->next();
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// Skip variadic types (Ticket #5774, #6059, #6172)
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if (Token::Match(tok, "%type% . . .")) {
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tok = tok->tokAt(4);
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continue;
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}
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// Skip '=', '?', ':'
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if (Token::Match(tok, "=|?|:"))
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tok = tok->next();
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if (!tok)
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return 0;
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// Skip casts
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if (tok->str() == "(") {
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tok = tok->link();
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if (tok)
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tok = tok->next();
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}
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// skip std::
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if (tok && tok->str() == "::")
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tok = tok->next();
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while (Token::Match(tok, "%name% ::")) {
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tok = tok->tokAt(2);
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if (tok && tok->str() == "*") // Ticket #5759: Class member pointer as a template argument; skip '*'
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tok = tok->next();
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}
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if (!tok)
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return 0;
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// num/type ..
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if (!tok->isNumber() && tok->tokType() != Token::eChar && !tok->isName() && !tok->isOp())
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return 0;
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tok = tok->next();
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if (!tok)
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return 0;
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// * / const
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while (Token::Match(tok, "*|&|&&|const"))
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tok = tok->next();
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if (!tok)
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return 0;
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// Function pointer or prototype..
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while (Token::Match(tok, "(|[")) {
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if (!tok->link())
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syntaxError(tok);
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tok = tok->link()->next();
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while (Token::Match(tok, "const|volatile")) // Ticket #5786: Skip function cv-qualifiers
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tok = tok->next();
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}
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if (!tok)
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return 0;
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// inner template
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if (tok->str() == "<") {
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++level;
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tok = tok->next();
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}
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if (!tok)
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return 0;
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// ,/>
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while (Token::Match(tok, ">|>>")) {
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if (level == 0)
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return ((tok->str() == ">") ? numberOfParameters : 0);
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--level;
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if (tok->str() == ">>") {
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if (level == 0)
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return numberOfParameters;
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--level;
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}
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tok = tok->next();
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if (Token::simpleMatch(tok,"("))
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tok = tok->link()->next();
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if (!tok)
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return 0;
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}
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if (tok->str() != ",")
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continue;
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if (level == 0)
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++numberOfParameters;
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tok = tok->next();
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}
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return 0;
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}
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bool TemplateSimplifier::removeTemplate(Token *tok)
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{
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if (!Token::simpleMatch(tok, "template <"))
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return false;
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int indentlevel = 0;
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unsigned int countgt = 0; // Counter for ">"
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for (const Token *tok2 = tok->next(); tok2; tok2 = tok2->next()) {
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if (tok2->str() == "(") {
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tok2 = tok2->link();
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} else if (tok2->str() == ")") { // garbage code! (#3504)
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Token::eraseTokens(tok,tok2);
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tok->deleteThis();
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return false;
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}
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else if (tok2->str() == "{") {
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tok2 = tok2->link()->next();
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Token::eraseTokens(tok, tok2);
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if (tok2 && tok2->str() == ";" && tok2->next())
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tok->deleteNext();
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tok->deleteThis();
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return true;
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} else if (tok2->str() == "}") { // garbage code! (#3449)
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Token::eraseTokens(tok,tok2);
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tok->deleteThis();
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return false;
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}
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// Count ">"
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if (tok2->str() == ">")
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countgt++;
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// don't remove constructor
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if (tok2->str() == "explicit" ||
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(countgt == 1 && Token::Match(tok2->previous(), "> %type% (") &&
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Tokenizer::startOfExecutableScope(tok2->linkAt(1)))) {
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Token::eraseTokens(tok, tok2);
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tok->deleteThis();
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return true;
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}
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if (tok2->str() == ";") {
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tok2 = tok2->next();
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Token::eraseTokens(tok, tok2);
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tok->deleteThis();
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return true;
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}
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if (tok2->str() == "<")
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++indentlevel;
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else if (indentlevel >= 2 && tok2->str() == ">")
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--indentlevel;
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else if (Token::Match(tok2, "> class|struct %name% [,)]")) {
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tok2 = tok2->next();
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Token::eraseTokens(tok, tok2);
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tok->deleteThis();
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return true;
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}
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}
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return false;
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}
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std::set<std::string> TemplateSimplifier::expandSpecialized(Token *tokens)
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{
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std::set<std::string> expandedtemplates;
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// Locate specialized templates..
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for (Token *tok = tokens; tok; tok = tok->next()) {
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if (!Token::simpleMatch(tok, "template < >"))
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continue;
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// what kind of template is this?
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Token *tok2 = tok->tokAt(3);
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while (tok2 && (tok2->isName() || tok2->str() == "*"))
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tok2 = tok2->next();
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if (!TemplateSimplifier::templateParameters(tok2))
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continue;
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// unknown template.. bail out
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if (!tok2->previous()->isName())
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continue;
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tok2 = tok2->previous();
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std::string s;
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{
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std::ostringstream ostr;
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const Token *tok3 = tok2;
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for (; tok3 && tok3->str() != ">"; tok3 = tok3->next()) {
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if (tok3 != tok2)
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ostr << " ";
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ostr << tok3->str();
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}
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if (!Token::Match(tok3, "> (|{|:"))
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continue;
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s = ostr.str();
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}
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// remove spaces to create new name
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const std::string name(s + " >");
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expandedtemplates.insert(name);
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// Rename template..
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Token::eraseTokens(tok2, Token::findsimplematch(tok2, "<")->findClosingBracket()->next());
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tok2->str(name);
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// delete the "template < >"
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tok->deleteNext(2);
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tok->deleteThis();
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// Use this special template in the code..
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while (nullptr != (tok2 = const_cast<Token *>(Token::findsimplematch(tok2, name.c_str())))) {
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Token::eraseTokens(tok2, Token::findsimplematch(tok2, "<")->findClosingBracket()->next());
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tok2->str(name);
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}
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}
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return expandedtemplates;
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}
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/// TODO: This is copy pasted from Tokenizer. We should reuse this code.
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namespace {
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struct ScopeInfo2 {
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ScopeInfo2(const std::string &name_, const Token *bodyEnd_) : name(name_), bodyEnd(bodyEnd_) {}
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const std::string name;
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const Token * const bodyEnd;
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};
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}
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static std::string getScopeName(const std::list<ScopeInfo2> &scopeInfo)
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{
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std::string ret;
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for (std::list<ScopeInfo2>::const_iterator it = scopeInfo.begin(); it != scopeInfo.end(); ++it)
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ret += (ret.empty() ? "" : " :: ") + (it->name);
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return ret;
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}
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static std::string getFullName(const std::list<ScopeInfo2> &scopeInfo, const std::string &name)
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{
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const std::string &scopeName = getScopeName(scopeInfo);
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return scopeName + (scopeName.empty() ? "" : " :: ") + name;
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}
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static void setScopeInfo(const Token *tok, std::list<ScopeInfo2> *scopeInfo)
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{
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while (tok->str() == "}" && !scopeInfo->empty() && tok == scopeInfo->back().bodyEnd)
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scopeInfo->pop_back();
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if (!Token::Match(tok, "namespace|class|struct %name% {|:|::"))
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return;
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tok = tok->next();
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std::string classname = tok->str();
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while (Token::Match(tok, "%name% :: %name%")) {
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tok = tok->tokAt(2);
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classname += " :: " + tok->str();
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}
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tok = tok->next();
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if (tok && tok->str() == ":") {
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// ...
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}
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if (tok && tok->str() == "{") {
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scopeInfo->emplace_back(classname,tok->link());
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}
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}
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std::list<TemplateSimplifier::TokenAndName> TemplateSimplifier::getTemplateDeclarations(Token *tokens, bool &codeWithTemplates)
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{
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std::list<ScopeInfo2> scopeInfo;
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std::list<TokenAndName> declarations;
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for (Token *tok = tokens; tok; tok = tok->next()) {
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setScopeInfo(tok, &scopeInfo);
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if (!Token::simpleMatch(tok, "template <"))
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continue;
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// Some syntax checks, see #6865
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if (!tok->tokAt(2))
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syntaxError(tok->next());
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if (tok->strAt(2)=="typename" &&
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!Token::Match(tok->tokAt(3), "%name%|.|,|>"))
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syntaxError(tok->next());
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codeWithTemplates = true;
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Token *parmEnd = tok->next()->findClosingBracket();
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for (const Token *tok2 = parmEnd; tok2; tok2 = tok2->next()) {
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if (tok2->str() == "(")
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tok2 = tok2->link();
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else if (tok2->str() == ")")
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break;
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// Just a declaration => ignore this
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else if (tok2->str() == ";")
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break;
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// Implementation => add to "templates"
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else if (tok2->str() == "{") {
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const int namepos = getTemplateNamePosition(parmEnd);
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if (namepos > 0)
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declarations.emplace_back(tok, getScopeName(scopeInfo), getFullName(scopeInfo, parmEnd->strAt(namepos)));
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break;
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}
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}
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}
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return declarations;
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}
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std::list<TemplateSimplifier::TokenAndName> TemplateSimplifier::getTemplateInstantiations(Token *tokens, const std::list<TokenAndName> &declarations)
|
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{
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std::list<TokenAndName> instantiations;
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std::list<ScopeInfo2> scopeList;
|
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for (Token *tok = tokens; tok; tok = tok->next()) {
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setScopeInfo(tok, &scopeList);
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// template definition.. skip it
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if (Token::simpleMatch(tok, "template <")) {
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tok = tok->next()->findClosingBracket();
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if (!tok)
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|
break;
|
|
// #7914
|
|
// Ignore template instantiations within template definitions: they will only be
|
|
// handled if the definition is actually instantiated
|
|
const Token *tok2 = Token::findmatch(tok, "{|;");
|
|
if (tok2 && tok2->str() == "{")
|
|
tok = tok2->link();
|
|
} else if (Token::Match(tok->previous(), "[({};=] %name% ::|<") ||
|
|
Token::Match(tok->previous(), "%type% %name% ::|<") ||
|
|
Token::Match(tok->tokAt(-2), "[,:] private|protected|public %name% ::|<")) {
|
|
|
|
std::string scopeName = getScopeName(scopeList);
|
|
while (Token::Match(tok, "%name% :: %name%")) {
|
|
scopeName += (scopeName.empty() ? "" : " :: ") + tok->str();
|
|
tok = tok->tokAt(2);
|
|
}
|
|
if (!Token::Match(tok, "%name% <"))
|
|
continue;
|
|
|
|
// Add inner template instantiations first => go to the ">"
|
|
// and then parse backwards, adding all seen instantiations
|
|
const Token *tok2 = tok->next()->findClosingBracket();
|
|
|
|
// parse backwards and add template instantiations
|
|
// TODO
|
|
for (; tok2 && tok2 != tok; tok2 = tok2->previous()) {
|
|
if (Token::Match(tok2, ", %name% <") &&
|
|
TemplateSimplifier::templateParameters(tok2->tokAt(2))) {
|
|
instantiations.emplace_back(tok2->next(), getScopeName(scopeList), getFullName(scopeList, tok2->strAt(1)));
|
|
}
|
|
}
|
|
|
|
// Add outer template..
|
|
if (TemplateSimplifier::templateParameters(tok->next())) {
|
|
const std::string scopeName1(scopeName);
|
|
while (true) {
|
|
const std::string fullName = scopeName + (scopeName.empty()?"":" :: ") + tok->str();
|
|
const std::list<TokenAndName>::const_iterator it = std::find_if(declarations.begin(), declarations.end(), FindName(fullName));
|
|
if (it != declarations.end()) {
|
|
instantiations.emplace_back(tok, getScopeName(scopeList), fullName);
|
|
break;
|
|
} else {
|
|
if (scopeName.empty()) {
|
|
instantiations.emplace_back(tok, getScopeName(scopeList), scopeName1 + (scopeName1.empty()?"":" :: ") + tok->str());
|
|
break;
|
|
}
|
|
const std::string::size_type pos = scopeName.rfind(" :: ");
|
|
scopeName = (pos == std::string::npos) ? std::string() : scopeName.substr(0,pos);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return instantiations;
|
|
}
|
|
|
|
|
|
void TemplateSimplifier::useDefaultArgumentValues(const std::list<TokenAndName> &templates,
|
|
std::list<TokenAndName> * const templateInstantiations)
|
|
{
|
|
for (std::list<TokenAndName>::const_iterator iter1 = templates.begin(); iter1 != templates.end(); ++iter1) {
|
|
// template parameters with default value has syntax such as:
|
|
// x = y
|
|
// this list will contain all the '=' tokens for such arguments
|
|
std::list<Token *> eq;
|
|
// and this set the position of parameters with a default value
|
|
std::set<std::size_t> defaultedArgPos;
|
|
|
|
// parameter number. 1,2,3,..
|
|
std::size_t templatepar = 1;
|
|
|
|
// parameter depth
|
|
std::size_t templateParmDepth = 0;
|
|
|
|
// the template classname. This will be empty for template functions
|
|
std::string classname;
|
|
|
|
// Scan template declaration..
|
|
for (Token *tok = iter1->token; tok; tok = tok->next()) {
|
|
if (Token::simpleMatch(tok, "template < >")) { // Ticket #5762: Skip specialization tokens
|
|
tok = tok->tokAt(2);
|
|
if (0 == templateParmDepth)
|
|
break;
|
|
continue;
|
|
}
|
|
|
|
if (tok->str() == "(") { // Ticket #6835
|
|
tok = tok->link();
|
|
continue;
|
|
}
|
|
|
|
if (tok->str() == "<" && templateParameters(tok))
|
|
++templateParmDepth;
|
|
|
|
// end of template parameters?
|
|
if (tok->str() == ">") {
|
|
if (Token::Match(tok, "> class|struct %name%"))
|
|
classname = tok->strAt(2);
|
|
if (templateParmDepth<2)
|
|
break;
|
|
else
|
|
--templateParmDepth;
|
|
}
|
|
|
|
// next template parameter
|
|
if (tok->str() == "," && (1 == templateParmDepth)) // Ticket #5823: Properly count parameters
|
|
++templatepar;
|
|
|
|
// default parameter value?
|
|
else if (Token::Match(tok, "= !!>")) {
|
|
if (defaultedArgPos.insert(templatepar).second) {
|
|
eq.push_back(tok);
|
|
} else {
|
|
// Ticket #5605: Syntax error (two equal signs for the same parameter), bail out
|
|
eq.clear();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (eq.empty() || classname.empty())
|
|
continue;
|
|
|
|
// iterate through all template instantiations
|
|
for (std::list<TokenAndName>::const_iterator iter2 = templateInstantiations->begin(); iter2 != templateInstantiations->end(); ++iter2) {
|
|
Token *tok = iter2->token;
|
|
|
|
if (!Token::simpleMatch(tok, (classname + " <").c_str()))
|
|
continue;
|
|
|
|
// count the parameters..
|
|
tok = tok->next();
|
|
const unsigned int usedpar = TemplateSimplifier::templateParameters(tok);
|
|
tok = tok->findClosingBracket();
|
|
|
|
if (tok && tok->str() == ">") {
|
|
tok = tok->previous();
|
|
std::list<Token *>::const_iterator it = eq.begin();
|
|
for (std::size_t i = (templatepar - eq.size()); it != eq.end() && i < usedpar; ++i)
|
|
++it;
|
|
while (it != eq.end()) {
|
|
int indentlevel = 0;
|
|
tok->insertToken(",");
|
|
tok = tok->next();
|
|
const Token *from = (*it)->next();
|
|
std::stack<Token *> links;
|
|
while (from && (!links.empty() || indentlevel || !Token::Match(from, ",|>"))) {
|
|
if (from->str() == "<")
|
|
++indentlevel;
|
|
else if (from->str() == ">")
|
|
--indentlevel;
|
|
tok->insertToken(from->str(), from->originalName());
|
|
tok = tok->next();
|
|
if (Token::Match(tok, "(|["))
|
|
links.push(tok);
|
|
else if (!links.empty() && Token::Match(tok, ")|]")) {
|
|
Token::createMutualLinks(links.top(), tok);
|
|
links.pop();
|
|
}
|
|
from = from->next();
|
|
}
|
|
++it;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (std::list<Token *>::iterator it = eq.begin(); it != eq.end(); ++it) {
|
|
Token * const eqtok = *it;
|
|
Token *tok2;
|
|
int indentlevel = 0;
|
|
for (tok2 = eqtok->next(); tok2; tok2 = tok2->next()) {
|
|
if (Token::Match(tok2, ";|)|}|]")) { // bail out #6607
|
|
tok2 = nullptr;
|
|
break;
|
|
}
|
|
if (Token::Match(tok2, "(|{|["))
|
|
tok2 = tok2->link();
|
|
else if (Token::Match(tok2, "%type% <") && templateParameters(tok2->next())) {
|
|
std::list<TokenAndName>::iterator ti = std::find_if(templateInstantiations->begin(),
|
|
templateInstantiations->end(),
|
|
FindToken(tok2));
|
|
if (ti != templateInstantiations->end())
|
|
templateInstantiations->erase(ti);
|
|
++indentlevel;
|
|
} else if (indentlevel > 0 && tok2->str() == ">")
|
|
--indentlevel;
|
|
else if (indentlevel == 0 && Token::Match(tok2, ",|>"))
|
|
break;
|
|
if (indentlevel < 0)
|
|
break;
|
|
}
|
|
// something went wrong, don't call eraseTokens()
|
|
// with a nullptr "end" parameter (=all remaining tokens).
|
|
if (!tok2)
|
|
continue;
|
|
|
|
Token::eraseTokens(eqtok, tok2);
|
|
eqtok->deleteThis();
|
|
}
|
|
}
|
|
}
|
|
|
|
void TemplateSimplifier::simplifyTemplateAliases(std::list<TemplateSimplifier::TokenAndName> *templateInstantiations)
|
|
{
|
|
std::list<TemplateSimplifier::TokenAndName>::iterator it1, it2;
|
|
for (it1 = templateInstantiations->begin(); it1 != templateInstantiations->end();) {
|
|
TemplateSimplifier::TokenAndName &templateAlias = *it1;
|
|
++it1;
|
|
Token *startToken = templateAlias.token;
|
|
while (Token::Match(startToken->tokAt(-2), "%name% :: %name%"))
|
|
startToken = startToken->tokAt(-2);
|
|
if (!Token::Match(startToken->tokAt(-4), "> using %name% = %name% ::|<"))
|
|
continue;
|
|
const std::string aliasName(startToken->strAt(-2));
|
|
const Token * const aliasToken1 = startToken;
|
|
|
|
// Get start token for alias
|
|
startToken = startToken->tokAt(-5);
|
|
while (Token::Match(startToken, "%name%|<|>|>>|,"))
|
|
startToken = startToken->previous();
|
|
if (!Token::Match(startToken, "[;{}] template <"))
|
|
continue;
|
|
|
|
// alias parameters..
|
|
std::vector<const Token *> aliasParameters;
|
|
TemplateSimplifier::getTemplateParametersInDeclaration(startToken->tokAt(3), aliasParameters);
|
|
std::map<std::string, unsigned int> aliasParameterNames;
|
|
for (unsigned int argnr = 0; argnr < aliasParameters.size(); ++argnr)
|
|
aliasParameterNames[aliasParameters[argnr]->str()] = argnr;
|
|
|
|
// Look for alias usages..
|
|
const Token *endToken = nullptr;
|
|
for (it2 = it1; it2 != templateInstantiations->end(); ++it2) {
|
|
TemplateSimplifier::TokenAndName &aliasUsage = *it2;
|
|
if (aliasUsage.name != aliasName)
|
|
continue;
|
|
std::vector<std::pair<Token *, Token *>> args;
|
|
Token *tok2 = aliasUsage.token->tokAt(2);
|
|
while (tok2) {
|
|
Token * const start = tok2;
|
|
while (tok2 && !Token::Match(tok2, "[,>;{}]")) {
|
|
if (tok2->link() && Token::Match(tok2, "(|<|["))
|
|
tok2 = tok2->link();
|
|
tok2 = tok2->next();
|
|
}
|
|
|
|
args.emplace_back(start, tok2);
|
|
if (tok2 && tok2->str() == ",") {
|
|
tok2 = tok2->next();
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
if (!tok2 || tok2->str() != ">" || args.size() != aliasParameters.size())
|
|
continue;
|
|
|
|
// Replace template alias code..
|
|
aliasUsage.name = templateAlias.name;
|
|
if (aliasUsage.name.find(' ') == std::string::npos) {
|
|
aliasUsage.token->str(templateAlias.token->str());
|
|
} else {
|
|
tok2 = TokenList::copyTokens(aliasUsage.token, aliasToken1, templateAlias.token, true);
|
|
aliasUsage.token->deleteThis();
|
|
aliasUsage.token = tok2;
|
|
}
|
|
tok2 = aliasUsage.token->next(); // the '<'
|
|
const Token * const endToken1 = templateAlias.token->next()->findClosingBracket();
|
|
Token * const endToken2 = TokenList::copyTokens(tok2, templateAlias.token->tokAt(2), endToken1->previous(), false);
|
|
for (const Token *tok1 = templateAlias.token->next(); tok2 != endToken2; tok1 = tok1->next(), tok2 = tok2->next()) {
|
|
if (!tok2->isName())
|
|
continue;
|
|
if (aliasParameterNames.find(tok2->str()) == aliasParameterNames.end()) {
|
|
// Create template instance..
|
|
if (Token::Match(tok1, "%name% <")) {
|
|
const std::list<TokenAndName>::iterator it = std::find_if(templateInstantiations->begin(),
|
|
templateInstantiations->end(),
|
|
FindToken(tok1));
|
|
if (it != templateInstantiations->end())
|
|
templateInstantiations->emplace_back(tok2, it->scope, it->name);
|
|
}
|
|
continue;
|
|
}
|
|
const unsigned int argnr = aliasParameterNames[tok2->str()];
|
|
const Token * const fromStart = args[argnr].first;
|
|
const Token * const fromEnd = args[argnr].second->previous();
|
|
Token * const destToken = tok2;
|
|
tok2 = TokenList::copyTokens(tok2, fromStart, fromEnd, true);
|
|
if (tok2 == destToken->next())
|
|
tok2 = destToken;
|
|
destToken->deleteThis();
|
|
}
|
|
|
|
endToken = endToken1->next();
|
|
|
|
// Remove alias usage code (parameters)
|
|
Token::eraseTokens(tok2, args.back().second);
|
|
}
|
|
if (endToken) {
|
|
// Remove all template instantiations in template alias
|
|
for (const Token *tok = startToken; tok != endToken; tok = tok->next()) {
|
|
if (!Token::Match(tok, "%name% <"))
|
|
continue;
|
|
std::list<TokenAndName>::iterator it = std::find_if(templateInstantiations->begin(),
|
|
templateInstantiations->end(),
|
|
FindToken(tok));
|
|
if (it == templateInstantiations->end())
|
|
continue;
|
|
std::list<TokenAndName>::iterator next = it;
|
|
++next;
|
|
if (it == it1)
|
|
it1 = next;
|
|
templateInstantiations->erase(it,next);
|
|
}
|
|
|
|
Token::eraseTokens(startToken, endToken);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool TemplateSimplifier::instantiateMatch(const Token *instance, const std::size_t numberOfArguments, const char patternAfter[])
|
|
{
|
|
// if (!Token::simpleMatch(instance, (name + " <").c_str()))
|
|
// return false;
|
|
|
|
if (numberOfArguments != TemplateSimplifier::templateParameters(instance->next()))
|
|
return false;
|
|
|
|
if (patternAfter) {
|
|
const Token *tok = instance;
|
|
unsigned int indentlevel = 0;
|
|
for (tok = instance; tok && (tok->str() != ">" || indentlevel > 0); tok = tok->next()) {
|
|
if (Token::Match(tok, "<|,|(|:: %name% <") && templateParameters(tok->tokAt(2)) > 0)
|
|
++indentlevel;
|
|
if (indentlevel > 0 && tok->str() == ">")
|
|
--indentlevel;
|
|
}
|
|
if (!tok || !Token::Match(tok->next(), patternAfter))
|
|
return false;
|
|
}
|
|
|
|
// nothing mismatching was found..
|
|
return true;
|
|
}
|
|
|
|
// Utility function for TemplateSimplifier::getTemplateNamePosition, that works on template member functions,
|
|
// hence this pattern: "> %type% [%type%] < ... > :: %type% ("
|
|
static bool getTemplateNamePositionTemplateMember(const Token *tok, int &namepos)
|
|
{
|
|
if (!Token::Match(tok, "> %type% <") && !Token::Match(tok, "> %type% %type% <"))
|
|
return false;
|
|
|
|
int currPos = 0;
|
|
currPos = 2 + (Token::Match(tok, "> %type% %type%"));
|
|
|
|
// Find the end of the template argument list
|
|
const Token *templateParmEnd = tok->linkAt(currPos);
|
|
if (!templateParmEnd)
|
|
templateParmEnd = tok->tokAt(currPos)->findClosingBracket();
|
|
if (!templateParmEnd)
|
|
return false;
|
|
|
|
if (Token::Match(templateParmEnd->next(), ":: %type% (")) {
|
|
// We have a match, and currPos points at the template list opening '<'. Move it to the closing '>'
|
|
for (const Token *tok2 = tok->tokAt(currPos) ; tok2 != templateParmEnd ; tok2 = tok2->next())
|
|
++currPos;
|
|
namepos = currPos + 2;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
int TemplateSimplifier::getTemplateNamePosition(const Token *tok)
|
|
{
|
|
// get the position of the template name
|
|
int namepos = 0, starAmpPossiblePosition = 0;
|
|
if (Token::Match(tok, "> class|struct %type% {|:|<"))
|
|
namepos = 2;
|
|
else if (Token::Match(tok, "> %type% *|&| %type% ("))
|
|
namepos = 2;
|
|
else if (Token::Match(tok, "> %type% %type% *|&| %type% ("))
|
|
namepos = 3;
|
|
else if (getTemplateNamePositionTemplateMember(tok, namepos))
|
|
;
|
|
else if (Token::Match(tok, "> %type% *|&| %type% :: %type% (")) {
|
|
namepos = 4;
|
|
starAmpPossiblePosition = 2;
|
|
} else if (Token::Match(tok, "> %type% %type% *|&| %type% :: %type% (")) {
|
|
namepos = 5;
|
|
starAmpPossiblePosition = 3;
|
|
} else {
|
|
// Name not found
|
|
return -1;
|
|
}
|
|
if (Token::Match(tok->tokAt(starAmpPossiblePosition ? starAmpPossiblePosition : namepos), "*|&"))
|
|
++namepos;
|
|
|
|
return namepos;
|
|
}
|
|
|
|
|
|
void TemplateSimplifier::expandTemplate(
|
|
TokenList& tokenlist,
|
|
const Token *templateDeclarationToken,
|
|
const std::string &fullName,
|
|
const std::vector<const Token *> &typeParametersInDeclaration,
|
|
const std::string &newName,
|
|
const std::vector<const Token *> &typesUsedInTemplateInstantiation,
|
|
std::list<TemplateSimplifier::TokenAndName> &templateInstantiations)
|
|
{
|
|
std::list<ScopeInfo2> scopeInfo;
|
|
bool inTemplateDefinition = false;
|
|
const Token *endOfTemplateDefinition = nullptr;
|
|
const Token * const templateDeclarationNameToken = templateDeclarationToken->tokAt(getTemplateNamePosition(templateDeclarationToken));
|
|
for (const Token *tok3 = tokenlist.front(); tok3; tok3 = tok3 ? tok3->next() : nullptr) {
|
|
setScopeInfo(const_cast<Token *>(tok3), &scopeInfo);
|
|
if (inTemplateDefinition) {
|
|
if (!endOfTemplateDefinition && tok3->str() == "{")
|
|
endOfTemplateDefinition = tok3->link();
|
|
if (tok3 == endOfTemplateDefinition)
|
|
inTemplateDefinition = false;
|
|
}
|
|
|
|
if (tok3->str()=="template") {
|
|
if (tok3->next() && tok3->next()->str()=="<") {
|
|
std::vector<const Token *> localTypeParametersInDeclaration;
|
|
getTemplateParametersInDeclaration(tok3->tokAt(2), localTypeParametersInDeclaration);
|
|
if (localTypeParametersInDeclaration.size() != typeParametersInDeclaration.size())
|
|
inTemplateDefinition = false; // Partial specialization
|
|
else
|
|
inTemplateDefinition = true;
|
|
} else {
|
|
inTemplateDefinition = false; // Only template instantiation
|
|
}
|
|
}
|
|
if (Token::Match(tok3, "(|["))
|
|
tok3 = tok3->link();
|
|
|
|
// Start of template..
|
|
if (tok3 == templateDeclarationToken) {
|
|
tok3 = tok3->next();
|
|
}
|
|
|
|
// member function implemented outside class definition
|
|
else if (inTemplateDefinition &&
|
|
Token::Match(tok3, "%name% <") &&
|
|
fullName == getFullName(scopeInfo, tok3->str()) &&
|
|
TemplateSimplifier::instantiateMatch(tok3, typeParametersInDeclaration.size(), ":: ~| %name% (")) {
|
|
// there must be template..
|
|
bool istemplate = false;
|
|
for (const Token *prev = tok3; prev && !Token::Match(prev, "[;{}]"); prev = prev->previous()) {
|
|
if (prev->str() == "template") {
|
|
istemplate = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!istemplate)
|
|
continue;
|
|
|
|
const Token *tok4 = tok3->next()->findClosingBracket();
|
|
while (tok4 && tok4->str() != "(")
|
|
tok4 = tok4->next();
|
|
if (!Tokenizer::isFunctionHead(tok4, ":{", true))
|
|
continue;
|
|
tokenlist.addtoken(newName, tok3->linenr(), tok3->fileIndex());
|
|
while (tok3 && tok3->str() != "::")
|
|
tok3 = tok3->next();
|
|
}
|
|
|
|
// not part of template.. go on to next token
|
|
else
|
|
continue;
|
|
|
|
std::stack<Token *> brackets; // holds "(", "[" and "{" tokens
|
|
|
|
// FIXME use full name matching somehow
|
|
const std::string lastName = (fullName.find(' ') != std::string::npos) ? fullName.substr(fullName.rfind(' ')+1) : fullName;
|
|
|
|
for (; tok3; tok3 = tok3->next()) {
|
|
if (tok3->isName()) {
|
|
// search for this token in the type vector
|
|
unsigned int itype = 0;
|
|
while (itype < typeParametersInDeclaration.size() && typeParametersInDeclaration[itype]->str() != tok3->str())
|
|
++itype;
|
|
|
|
// replace type with given type..
|
|
if (itype < typeParametersInDeclaration.size()) {
|
|
unsigned int typeindentlevel = 0;
|
|
for (const Token *typetok = typesUsedInTemplateInstantiation[itype];
|
|
typetok && (typeindentlevel>0 || !Token::Match(typetok, ",|>"));
|
|
typetok = typetok->next()) {
|
|
if (Token::simpleMatch(typetok, ". . .")) {
|
|
typetok = typetok->tokAt(2);
|
|
continue;
|
|
}
|
|
if (Token::Match(typetok, "%name% <") && templateParameters(typetok->next()) > 0)
|
|
++typeindentlevel;
|
|
else if (typeindentlevel > 0 && typetok->str() == ">")
|
|
--typeindentlevel;
|
|
tokenlist.addtoken(typetok, tok3->linenr(), tok3->fileIndex());
|
|
tokenlist.back()->isTemplateArg(true);
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// replace name..
|
|
if (tok3->str() == lastName) {
|
|
if (Token::Match(tok3->tokAt(-2), "> :: %name% ( )")) {
|
|
; // Ticket #7942: Replacing for out-of-line constructors generates invalid syntax
|
|
} else if (!Token::simpleMatch(tok3->next(), "<")) {
|
|
tokenlist.addtoken(newName, tok3->linenr(), tok3->fileIndex());
|
|
continue;
|
|
} else if (tok3 == templateDeclarationNameToken) {
|
|
tokenlist.addtoken(newName, tok3->linenr(), tok3->fileIndex());
|
|
tok3 = tok3->next()->findClosingBracket();
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// copy
|
|
tokenlist.addtoken(tok3, tok3->linenr(), tok3->fileIndex());
|
|
if (Token::Match(tok3, "%type% <") && Token::Match(tok3->next()->findClosingBracket(), ">|>>")) {
|
|
const Token *closingBracket = tok3->next()->findClosingBracket();
|
|
if (Token::simpleMatch(closingBracket->next(), "&")) {
|
|
int num = 0;
|
|
const Token *par = tok3->next();
|
|
while (num < typeParametersInDeclaration.size() && par != closingBracket) {
|
|
const std::string pattern("[<,] " + typeParametersInDeclaration[num]->str() + " [,>]");
|
|
if (!Token::Match(par, pattern.c_str()))
|
|
break;
|
|
++num;
|
|
par = par->tokAt(2);
|
|
}
|
|
if (num < typeParametersInDeclaration.size() || par != closingBracket)
|
|
continue;
|
|
}
|
|
|
|
std::string name = tok3->str();
|
|
for (const Token *prev = tok3->tokAt(-2); Token::Match(prev, "%name% ::"); prev = prev->tokAt(-2))
|
|
name = prev->str() + " :: " + name;
|
|
templateInstantiations.emplace_back(tokenlist.back(), getScopeName(scopeInfo), getFullName(scopeInfo, name));
|
|
}
|
|
|
|
// link() newly tokens manually
|
|
else if (tok3->str() == "{") {
|
|
brackets.push(tokenlist.back());
|
|
} else if (tok3->str() == "(") {
|
|
brackets.push(tokenlist.back());
|
|
} else if (tok3->str() == "[") {
|
|
brackets.push(tokenlist.back());
|
|
} else if (tok3->str() == "}") {
|
|
assert(brackets.empty() == false && brackets.top()->str() == "{");
|
|
Token::createMutualLinks(brackets.top(), tokenlist.back());
|
|
if (tok3->strAt(1) == ";") {
|
|
const Token * tokSemicolon = tok3->next();
|
|
tokenlist.addtoken(tokSemicolon, tokSemicolon->linenr(), tokSemicolon->fileIndex());
|
|
}
|
|
brackets.pop();
|
|
if (brackets.empty()) {
|
|
inTemplateDefinition = false;
|
|
break;
|
|
}
|
|
} else if (tok3->str() == ")") {
|
|
assert(brackets.empty() == false && brackets.top()->str() == "(");
|
|
Token::createMutualLinks(brackets.top(), tokenlist.back());
|
|
brackets.pop();
|
|
} else if (tok3->str() == "]") {
|
|
assert(brackets.empty() == false && brackets.top()->str() == "[");
|
|
Token::createMutualLinks(brackets.top(), tokenlist.back());
|
|
brackets.pop();
|
|
}
|
|
}
|
|
|
|
assert(brackets.empty());
|
|
}
|
|
}
|
|
|
|
static bool isLowerThanLogicalAnd(const Token *lower)
|
|
{
|
|
return lower->isAssignmentOp() || Token::Match(lower, "}|;|(|[|]|)|,|?|:|%oror%|return|throw|case");
|
|
}
|
|
static bool isLowerThanOr(const Token* lower)
|
|
{
|
|
return isLowerThanLogicalAnd(lower) || lower->str() == "&&";
|
|
}
|
|
static bool isLowerThanXor(const Token* lower)
|
|
{
|
|
return isLowerThanOr(lower) || lower->str() == "|";
|
|
}
|
|
static bool isLowerThanAnd(const Token* lower)
|
|
{
|
|
return isLowerThanXor(lower) || lower->str() == "^";
|
|
}
|
|
static bool isLowerThanShift(const Token* lower)
|
|
{
|
|
return isLowerThanAnd(lower) || lower->str() == "&";
|
|
}
|
|
static bool isLowerThanPlusMinus(const Token* lower)
|
|
{
|
|
return isLowerThanShift(lower) || Token::Match(lower, "%comp%|<<|>>");
|
|
}
|
|
static bool isLowerThanMulDiv(const Token* lower)
|
|
{
|
|
return isLowerThanPlusMinus(lower) || Token::Match(lower, "+|-");
|
|
}
|
|
static bool isLowerEqualThanMulDiv(const Token* lower)
|
|
{
|
|
return isLowerThanMulDiv(lower) || Token::Match(lower, "[*/%]");
|
|
}
|
|
|
|
|
|
bool TemplateSimplifier::simplifyNumericCalculations(Token *tok)
|
|
{
|
|
bool ret = false;
|
|
// (1-2)
|
|
while (tok->tokAt(4) && tok->next()->isNumber() && tok->tokAt(3)->isNumber()) { // %any% %num% %any% %num% %any%
|
|
const Token *before = tok;
|
|
const Token* op = tok->tokAt(2);
|
|
const Token* after = tok->tokAt(4);
|
|
const std::string &num1 = op->previous()->str();
|
|
const std::string &num2 = op->next()->str();
|
|
if (Token::Match(before, "* %num% /") && (num2 != "0") && num1 == MathLib::multiply(num2, MathLib::divide(num1, num2))) {
|
|
// Division where result is a whole number
|
|
} else if (!((op->str() == "*" && (isLowerThanMulDiv(before) || before->str() == "*") && isLowerEqualThanMulDiv(after)) || // associative
|
|
(Token::Match(op, "[/%]") && isLowerThanMulDiv(before) && isLowerEqualThanMulDiv(after)) || // NOT associative
|
|
(Token::Match(op, "[+-]") && isLowerThanMulDiv(before) && isLowerThanMulDiv(after)) || // Only partially (+) associative, but handled later
|
|
(Token::Match(op, ">>|<<") && isLowerThanShift(before) && isLowerThanPlusMinus(after)) || // NOT associative
|
|
(op->str() == "&" && isLowerThanShift(before) && isLowerThanShift(after)) || // associative
|
|
(op->str() == "^" && isLowerThanAnd(before) && isLowerThanAnd(after)) || // associative
|
|
(op->str() == "|" && isLowerThanXor(before) && isLowerThanXor(after)) || // associative
|
|
(op->str() == "&&" && isLowerThanOr(before) && isLowerThanOr(after)) ||
|
|
(op->str() == "||" && isLowerThanLogicalAnd(before) && isLowerThanLogicalAnd(after))))
|
|
break;
|
|
|
|
tok = tok->next();
|
|
|
|
// Don't simplify "%num% / 0"
|
|
if (Token::Match(op, "[/%] 0"))
|
|
continue;
|
|
|
|
// Integer operations
|
|
if (Token::Match(op, ">>|<<|&|^|%or%")) {
|
|
// Don't simplify if operand is negative, shifting with negative
|
|
// operand is UB. Bitmasking with negative operand is implementation
|
|
// defined behaviour.
|
|
if (MathLib::isNegative(tok->str()) || MathLib::isNegative(tok->strAt(2)))
|
|
continue;
|
|
|
|
const MathLib::value v1(num1);
|
|
const MathLib::value v2(num2);
|
|
|
|
if (!v1.isInt() || !v2.isInt())
|
|
continue;
|
|
|
|
switch (op->str()[0]) {
|
|
case '<':
|
|
tok->str((v1 << v2).str());
|
|
break;
|
|
case '>':
|
|
tok->str((v1 >> v2).str());
|
|
break;
|
|
case '&':
|
|
tok->str((v1 & v2).str());
|
|
break;
|
|
case '|':
|
|
tok->str((v1 | v2).str());
|
|
break;
|
|
case '^':
|
|
tok->str((v1 ^ v2).str());
|
|
break;
|
|
};
|
|
}
|
|
|
|
// Logical operations
|
|
else if (Token::Match(op, "%oror%|&&")) {
|
|
const bool op1 = !MathLib::isNullValue(num1);
|
|
const bool op2 = !MathLib::isNullValue(num2);
|
|
const bool result = (op->str() == "||") ? (op1 || op2) : (op1 && op2);
|
|
tok->str(result ? "1" : "0");
|
|
}
|
|
|
|
else if (Token::Match(tok->previous(), "- %num% - %num%"))
|
|
tok->str(MathLib::add(num1, num2));
|
|
else if (Token::Match(tok->previous(), "- %num% + %num%"))
|
|
tok->str(MathLib::subtract(num1, num2));
|
|
else {
|
|
try {
|
|
tok->str(MathLib::calculate(num1, num2, op->str()[0]));
|
|
} catch (InternalError &e) {
|
|
e.token = tok;
|
|
throw;
|
|
}
|
|
}
|
|
|
|
tok->deleteNext(2);
|
|
tok = tok->previous();
|
|
|
|
ret = true;
|
|
}
|
|
|
|
if (Token::Match(tok, "%oror%|&& %num% %oror%|&&|,|)") || Token::Match(tok, "[(,] %num% %oror%|&&")) {
|
|
tok->next()->str(MathLib::isNullValue(tok->next()->str()) ? "0" : "1");
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
// TODO: This is not the correct class for simplifyCalculations(), so it
|
|
// should be moved away.
|
|
bool TemplateSimplifier::simplifyCalculations(Token *_tokens)
|
|
{
|
|
bool ret = false;
|
|
for (Token *tok = _tokens; tok; tok = tok->next()) {
|
|
// Remove parentheses around variable..
|
|
// keep parentheses here: dynamic_cast<Fred *>(p);
|
|
// keep parentheses here: A operator * (int);
|
|
// keep parentheses here: int ( * ( * f ) ( ... ) ) (int) ;
|
|
// keep parentheses here: int ( * * ( * compilerHookVector ) (void) ) ( ) ;
|
|
// keep parentheses here: operator new [] (size_t);
|
|
// keep parentheses here: Functor()(a ... )
|
|
// keep parentheses here: ) ( var ) ;
|
|
if ((Token::Match(tok->next(), "( %name% ) ;|)|,|]") ||
|
|
(Token::Match(tok->next(), "( %name% ) %cop%") && (tok->tokAt(2)->varId()>0 || !Token::Match(tok->tokAt(4), "[*&+-~]")))) &&
|
|
!tok->isName() &&
|
|
tok->str() != ">" &&
|
|
tok->str() != ")" &&
|
|
tok->str() != "]") {
|
|
tok->deleteNext();
|
|
tok = tok->next();
|
|
tok->deleteNext();
|
|
ret = true;
|
|
}
|
|
|
|
if (Token::Match(tok->previous(), "(|&&|%oror% %char% %comp% %num% &&|%oror%|)")) {
|
|
tok->str(MathLib::toString(MathLib::toLongNumber(tok->str())));
|
|
}
|
|
|
|
if (tok->isNumber()) {
|
|
// Remove redundant conditions (0&&x) (1||x)
|
|
if (Token::Match(tok->previous(), "[(=,] 0 &&") ||
|
|
Token::Match(tok->previous(), "[(=,] 1 %oror%")) {
|
|
unsigned int par = 0;
|
|
const Token *tok2 = tok;
|
|
const bool andAnd = (tok->next()->str() == "&&");
|
|
for (; tok2; tok2 = tok2->next()) {
|
|
if (tok2->str() == "(" || tok2->str() == "[")
|
|
++par;
|
|
else if (tok2->str() == ")" || tok2->str() == "]") {
|
|
if (par == 0)
|
|
break;
|
|
--par;
|
|
} else if (par == 0 && isLowerThanLogicalAnd(tok2) && (andAnd || tok2->str() != "||"))
|
|
break;
|
|
}
|
|
if (tok2) {
|
|
Token::eraseTokens(tok, tok2);
|
|
ret = true;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (tok->str() == "0") {
|
|
if ((Token::Match(tok->previous(), "[+-] 0 %cop%|;") && isLowerThanMulDiv(tok->next())) ||
|
|
(Token::Match(tok->previous(), "%or% 0 %cop%|;") && isLowerThanXor(tok->next()))) {
|
|
tok = tok->previous();
|
|
if (Token::Match(tok->tokAt(-4), "[;{}] %name% = %name% [+-|] 0 ;") &&
|
|
tok->strAt(-3) == tok->previous()->str()) {
|
|
tok = tok->tokAt(-4);
|
|
tok->deleteNext(5);
|
|
} else {
|
|
tok = tok->previous();
|
|
tok->deleteNext(2);
|
|
}
|
|
ret = true;
|
|
} else if (Token::Match(tok->previous(), "[=([,] 0 [+|]") ||
|
|
Token::Match(tok->previous(), "return|case 0 [+|]")) {
|
|
tok = tok->previous();
|
|
tok->deleteNext(2);
|
|
ret = true;
|
|
} else if (Token::Match(tok->previous(), "[=[(,] 0 * %name%|%num% ,|]|)|;|=|%cop%") ||
|
|
Token::Match(tok->previous(), "[=[(,] 0 * (") ||
|
|
Token::Match(tok->previous(), "return|case 0 *|&& %name%|%num% ,|:|;|=|%cop%") ||
|
|
Token::Match(tok->previous(), "return|case 0 *|&& (")) {
|
|
tok->deleteNext();
|
|
if (tok->next()->str() == "(")
|
|
Token::eraseTokens(tok, tok->next()->link());
|
|
tok->deleteNext();
|
|
ret = true;
|
|
} else if (Token::Match(tok->previous(), "[=[(,] 0 && *|& %any% ,|]|)|;|=|%cop%") ||
|
|
Token::Match(tok->previous(), "return|case 0 && *|& %any% ,|:|;|=|%cop%")) {
|
|
tok->deleteNext();
|
|
tok->deleteNext();
|
|
if (tok->next()->str() == "(")
|
|
Token::eraseTokens(tok, tok->next()->link());
|
|
tok->deleteNext();
|
|
ret = true;
|
|
}
|
|
}
|
|
|
|
if (tok->str() == "1") {
|
|
if (Token::Match(tok->previous(), "[=[(,] 1 %oror% %any% ,|]|)|;|=|%cop%") ||
|
|
Token::Match(tok->previous(), "return|case 1 %oror% %any% ,|:|;|=|%cop%")) {
|
|
tok->deleteNext();
|
|
if (tok->next()->str() == "(")
|
|
Token::eraseTokens(tok, tok->next()->link());
|
|
tok->deleteNext();
|
|
ret = true;
|
|
} else if (Token::Match(tok->previous(), "[=[(,] 1 %oror% *|& %any% ,|]|)|;|=|%cop%") ||
|
|
Token::Match(tok->previous(), "return|case 1 %oror% *|& %any% ,|:|;|=|%cop%")) {
|
|
tok->deleteNext();
|
|
tok->deleteNext();
|
|
if (tok->next()->str() == "(")
|
|
Token::eraseTokens(tok, tok->next()->link());
|
|
tok->deleteNext();
|
|
ret = true;
|
|
}
|
|
}
|
|
|
|
if (Token::Match(tok->tokAt(-2), "%any% * 1") || Token::Match(tok->previous(), "%any% 1 *")) {
|
|
tok = tok->previous();
|
|
if (tok->str() == "*")
|
|
tok = tok->previous();
|
|
tok->deleteNext(2);
|
|
ret = true;
|
|
}
|
|
|
|
// Remove parentheses around number..
|
|
if (Token::Match(tok->tokAt(-2), "%op%|< ( %num% )") && tok->strAt(-2) != ">") {
|
|
tok = tok->previous();
|
|
tok->deleteThis();
|
|
tok->deleteNext();
|
|
ret = true;
|
|
}
|
|
|
|
if (Token::Match(tok->previous(), "( 0 [|+]") ||
|
|
Token::Match(tok->previous(), "[|+-] 0 )")) {
|
|
tok = tok->previous();
|
|
if (Token::Match(tok, "[|+-]"))
|
|
tok = tok->previous();
|
|
tok->deleteNext(2);
|
|
ret = true;
|
|
}
|
|
|
|
if (Token::Match(tok, "%num% %comp% %num%") &&
|
|
MathLib::isInt(tok->str()) &&
|
|
MathLib::isInt(tok->strAt(2))) {
|
|
if (Token::Match(tok->previous(), "(|&&|%oror%") && Token::Match(tok->tokAt(3), ")|&&|%oror%|?")) {
|
|
const MathLib::bigint op1(MathLib::toLongNumber(tok->str()));
|
|
const std::string &cmp(tok->next()->str());
|
|
const MathLib::bigint op2(MathLib::toLongNumber(tok->strAt(2)));
|
|
|
|
std::string result;
|
|
|
|
if (cmp == "==")
|
|
result = (op1 == op2) ? "1" : "0";
|
|
else if (cmp == "!=")
|
|
result = (op1 != op2) ? "1" : "0";
|
|
else if (cmp == "<=")
|
|
result = (op1 <= op2) ? "1" : "0";
|
|
else if (cmp == ">=")
|
|
result = (op1 >= op2) ? "1" : "0";
|
|
else if (cmp == "<")
|
|
result = (op1 < op2) ? "1" : "0";
|
|
else
|
|
result = (op1 > op2) ? "1" : "0";
|
|
|
|
tok->str(result);
|
|
tok->deleteNext(2);
|
|
ret = true;
|
|
tok = tok->previous();
|
|
}
|
|
}
|
|
}
|
|
|
|
else if (simplifyNumericCalculations(tok)) {
|
|
ret = true;
|
|
while (Token::Match(tok->tokAt(-2), "%cop%|,|( %num% %cop% %num% %cop%|,|)")) {
|
|
Token *before = tok->tokAt(-2);
|
|
if (simplifyNumericCalculations(before))
|
|
tok = before;
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
const Token * TemplateSimplifier::getTemplateParametersInDeclaration(
|
|
const Token * tok,
|
|
std::vector<const Token *> & typeParametersInDeclaration)
|
|
{
|
|
typeParametersInDeclaration.clear();
|
|
for (; tok && tok->str() != ">"; tok = tok->next()) {
|
|
if (Token::Match(tok, "%name% ,|>"))
|
|
typeParametersInDeclaration.push_back(tok);
|
|
}
|
|
return tok;
|
|
}
|
|
|
|
static bool matchSpecialization(const Token *templateDeclarationNameToken, const Token *templateInstantiationNameToken, const std::list<const Token *> & specializations)
|
|
{
|
|
// Is there a matching specialization?
|
|
for (std::list<const Token *>::const_iterator it = specializations.begin(); it != specializations.end(); ++it) {
|
|
if (!Token::Match(*it, "%name% <"))
|
|
continue;
|
|
const Token *startToken = (*it);
|
|
while (startToken->previous() && !Token::Match(startToken->previous(), "[;{}]"))
|
|
startToken = startToken->previous();
|
|
if (!Token::simpleMatch(startToken, "template <"))
|
|
continue;
|
|
std::vector<const Token *> templateParameters;
|
|
TemplateSimplifier::getTemplateParametersInDeclaration(startToken->tokAt(2), templateParameters);
|
|
|
|
const Token *instToken = templateInstantiationNameToken->tokAt(2);
|
|
const Token *declToken = (*it)->tokAt(2);
|
|
const Token * const endToken = (*it)->next()->findClosingBracket();
|
|
while (declToken != endToken) {
|
|
if (declToken->str() != instToken->str()) {
|
|
int nr = 0;
|
|
while (nr < templateParameters.size() && templateParameters[nr]->str() != declToken->str())
|
|
++nr;
|
|
|
|
if (nr == templateParameters.size())
|
|
break;
|
|
}
|
|
declToken = declToken->next();
|
|
instToken = instToken->next();
|
|
}
|
|
|
|
if (declToken == endToken && instToken->str() == ">") {
|
|
// specialization matches.
|
|
return templateDeclarationNameToken == *it;
|
|
}
|
|
}
|
|
|
|
// No specialization matches. Return true if the declaration is not a specialization.
|
|
return Token::Match(templateDeclarationNameToken, "%name% !!<");
|
|
}
|
|
|
|
bool TemplateSimplifier::simplifyTemplateInstantiations(
|
|
TokenList& tokenlist,
|
|
ErrorLogger* errorlogger,
|
|
const Settings *_settings,
|
|
const TokenAndName &templateDeclaration,
|
|
const std::list<const Token *> &specializations,
|
|
const std::time_t maxtime,
|
|
std::list<TokenAndName> &templateInstantiations,
|
|
std::set<std::string> &expandedtemplates)
|
|
{
|
|
// this variable is not used at the moment. The intention was to
|
|
// allow continuous instantiations until all templates has been expanded
|
|
//bool done = false;
|
|
|
|
// Contains tokens such as "T"
|
|
std::vector<const Token *> typeParametersInDeclaration;
|
|
const Token * const tok = getTemplateParametersInDeclaration(templateDeclaration.token->tokAt(2), typeParametersInDeclaration);
|
|
|
|
// bail out if the end of the file was reached
|
|
if (!tok)
|
|
return false;
|
|
|
|
const bool printDebug = _settings->debugwarnings;
|
|
|
|
// get the position of the template name
|
|
const int namepos = TemplateSimplifier::getTemplateNamePosition(tok);
|
|
if (namepos == -1) {
|
|
// debug message that we bail out..
|
|
if (printDebug && errorlogger) {
|
|
const std::list<const Token *> callstack(1, tok);
|
|
errorlogger->reportErr(ErrorLogger::ErrorMessage(callstack, &tokenlist, Severity::debug, "debug", "simplifyTemplates: bailing out", false));
|
|
}
|
|
return false;
|
|
}
|
|
|
|
const bool isfunc(tok->strAt(namepos + 1) == "(");
|
|
|
|
// locate template usage..
|
|
std::string::size_type numberOfTemplateInstantiations = templateInstantiations.size();
|
|
unsigned int recursiveCount = 0;
|
|
|
|
bool instantiated = false;
|
|
|
|
for (const TokenAndName &instantiation : templateInstantiations) {
|
|
if (numberOfTemplateInstantiations != templateInstantiations.size()) {
|
|
numberOfTemplateInstantiations = templateInstantiations.size();
|
|
simplifyCalculations(tokenlist.front());
|
|
++recursiveCount;
|
|
if (recursiveCount > 100) {
|
|
// bail out..
|
|
break;
|
|
}
|
|
}
|
|
|
|
// already simplified
|
|
if (!Token::Match(instantiation.token, "%name% <"))
|
|
continue;
|
|
|
|
if (instantiation.name != templateDeclaration.name)
|
|
continue;
|
|
|
|
if (!matchSpecialization(tok->tokAt(namepos), instantiation.token, specializations))
|
|
continue;
|
|
|
|
Token * const tok2 = instantiation.token;
|
|
if (errorlogger && !tokenlist.getFiles().empty())
|
|
errorlogger->reportProgress(tokenlist.getFiles()[0], "TemplateSimplifier::simplifyTemplateInstantiations()", tok2->progressValue());
|
|
#ifdef MAXTIME
|
|
if (std::time(0) > maxtime)
|
|
return false;
|
|
#else
|
|
(void)maxtime;
|
|
#endif
|
|
assert(tokenlist.validateToken(tok2)); // that assertion fails on examples from #6021
|
|
|
|
const Token *startToken = tok2;
|
|
while (Token::Match(startToken->tokAt(-2), "%name% :: %name%"))
|
|
startToken = startToken->tokAt(-2);
|
|
|
|
if (Token::Match(startToken->previous(), "[;{}=]") &&
|
|
!TemplateSimplifier::instantiateMatch(tok2, typeParametersInDeclaration.size(), isfunc ? "(" : "*| %name%"))
|
|
continue;
|
|
|
|
// New type..
|
|
std::vector<const Token *> typesUsedInTemplateInstantiation;
|
|
std::string typeForNewName;
|
|
std::list<std::string> typeStringsUsedInTemplateInstantiation;
|
|
unsigned int indentlevel = 0;
|
|
for (const Token *tok3 = tok2->tokAt(2); tok3 && (indentlevel > 0 || tok3->str() != ">"); tok3 = tok3->next()) {
|
|
// #2648 - unhandled parentheses => bail out
|
|
// #2721 - unhandled [ => bail out
|
|
if (Token::Match(tok3, "(|[")) {
|
|
typeForNewName.clear();
|
|
break;
|
|
}
|
|
if (!tok3->next()) {
|
|
typeForNewName.clear();
|
|
break;
|
|
}
|
|
if (Token::Match(tok3->tokAt(-2), "<|,|:: %name% <") && templateParameters(tok3) > 0)
|
|
++indentlevel;
|
|
else if (indentlevel > 0 && Token::Match(tok3, "> [,>]"))
|
|
--indentlevel;
|
|
if (indentlevel == 0 && Token::Match(tok3->previous(), "[<,]"))
|
|
typesUsedInTemplateInstantiation.push_back(tok3);
|
|
const bool constconst = tok3->str() == "const" && tok3->strAt(1) == "const";
|
|
if (!constconst) {
|
|
typeStringsUsedInTemplateInstantiation.push_back(tok3->str());
|
|
}
|
|
// add additional type information
|
|
if (!constconst && !Token::Match(tok3, "class|struct|enum")) {
|
|
if (tok3->isUnsigned())
|
|
typeForNewName += "unsigned";
|
|
else if (tok3->isSigned())
|
|
typeForNewName += "signed";
|
|
if (tok3->isLong())
|
|
typeForNewName += "long";
|
|
if (!typeForNewName.empty())
|
|
typeForNewName += ' ';
|
|
typeForNewName += tok3->str();
|
|
}
|
|
}
|
|
|
|
if (typeForNewName.empty() || typeParametersInDeclaration.size() != typesUsedInTemplateInstantiation.size()) {
|
|
if (printDebug && errorlogger) {
|
|
std::list<const Token *> callstack(1, tok2);
|
|
errorlogger->reportErr(ErrorLogger::ErrorMessage(callstack, &tokenlist, Severity::debug, "debug",
|
|
"Failed to instantiate template \"" + instantiation.name + "\". The checking continues anyway.", false));
|
|
}
|
|
if (typeForNewName.empty())
|
|
continue;
|
|
break;
|
|
}
|
|
|
|
// New classname/funcname..
|
|
const std::string newName(templateDeclaration.name + " < " + typeForNewName + " >");
|
|
|
|
if (expandedtemplates.find(newName) == expandedtemplates.end()) {
|
|
expandedtemplates.insert(newName);
|
|
TemplateSimplifier::expandTemplate(tokenlist, tok, instantiation.name, typeParametersInDeclaration, newName, typesUsedInTemplateInstantiation, templateInstantiations);
|
|
instantiated = true;
|
|
}
|
|
|
|
// Replace all these template usages..
|
|
replaceTemplateUsage(tok2, instantiation.name, typeStringsUsedInTemplateInstantiation, newName, typesUsedInTemplateInstantiation, templateInstantiations);
|
|
}
|
|
|
|
// Template has been instantiated .. then remove the template declaration
|
|
return instantiated;
|
|
}
|
|
|
|
static bool matchTemplateParameters(const Token *nameTok, const std::list<std::string> &strings)
|
|
{
|
|
std::list<std::string>::const_iterator it = strings.begin();
|
|
const Token *tok = nameTok->tokAt(2);
|
|
while (tok && it != strings.end() && *it == tok->str()) {
|
|
tok = tok->next();
|
|
++it;
|
|
}
|
|
return it == strings.end() && tok && tok->str() == ">";
|
|
}
|
|
|
|
void TemplateSimplifier::replaceTemplateUsage(Token * const instantiationToken,
|
|
const std::string &templateName,
|
|
const std::list<std::string> &typeStringsUsedInTemplateInstantiation,
|
|
const std::string &newName,
|
|
const std::vector<const Token *> &typesUsedInTemplateInstantiation,
|
|
std::list<TokenAndName> &templateInstantiations)
|
|
{
|
|
std::list<ScopeInfo2> scopeInfo;
|
|
std::list< std::pair<Token *, Token *> > removeTokens;
|
|
for (Token *nameTok = instantiationToken; nameTok; nameTok = nameTok->next()) {
|
|
setScopeInfo(nameTok, &scopeInfo);
|
|
if (!Token::Match(nameTok, "%name% <"))
|
|
continue;
|
|
if (!matchTemplateParameters(nameTok, typeStringsUsedInTemplateInstantiation))
|
|
continue;
|
|
|
|
// FIXME Proper name matching
|
|
const std::string lastName(templateName.find(' ') == std::string::npos ? templateName : templateName.substr(templateName.rfind(' ') + 1));
|
|
if (lastName != nameTok->str())
|
|
continue;
|
|
|
|
// match parameters
|
|
Token * tok2 = nameTok->tokAt(2);
|
|
unsigned int typeCountInInstantiation = 1U; // There is always at least one type
|
|
const Token *typetok = (!typesUsedInTemplateInstantiation.empty()) ? typesUsedInTemplateInstantiation[0] : nullptr;
|
|
unsigned int indentlevel2 = 0; // indentlevel for tokgt
|
|
while (tok2 && (indentlevel2 > 0 || tok2->str() != ">")) {
|
|
if (tok2->str() == "<" && templateParameters(tok2) > 0)
|
|
++indentlevel2;
|
|
else if (indentlevel2 > 0 && Token::Match(tok2, "> [,>]"))
|
|
--indentlevel2;
|
|
else if (indentlevel2 == 0) {
|
|
if (tok2->str() != ",") {
|
|
if (!typetok ||
|
|
tok2->isUnsigned() != typetok->isUnsigned() ||
|
|
tok2->isSigned() != typetok->isSigned() ||
|
|
tok2->isLong() != typetok->isLong()) {
|
|
break;
|
|
}
|
|
|
|
typetok = typetok->next();
|
|
} else {
|
|
if (typeCountInInstantiation < typesUsedInTemplateInstantiation.size())
|
|
typetok = typesUsedInTemplateInstantiation[typeCountInInstantiation++];
|
|
else
|
|
typetok = nullptr;
|
|
}
|
|
}
|
|
tok2 = tok2->next();
|
|
}
|
|
|
|
if (!tok2)
|
|
break;
|
|
|
|
// matching template usage => replace tokens..
|
|
// Foo < int > => Foo<int>
|
|
if (tok2->str() == ">" && typeCountInInstantiation == typesUsedInTemplateInstantiation.size()) {
|
|
Token * const nameTok1 = nameTok;
|
|
while (Token::Match(nameTok->tokAt(-2), "%name% :: %name%"))
|
|
nameTok = nameTok->tokAt(-2);
|
|
nameTok->str(newName);
|
|
for (std::list<TokenAndName>::iterator it = templateInstantiations.begin(); it != templateInstantiations.end(); ++it) {
|
|
if (it->token == nameTok1)
|
|
it->token = nameTok;
|
|
}
|
|
for (Token *tok = nameTok1->next(); tok != tok2; tok = tok->next()) {
|
|
if (tok->isName()) {
|
|
std::list<TokenAndName>::iterator ti;
|
|
for (ti = templateInstantiations.begin(); ti != templateInstantiations.end();) {
|
|
if (ti->token == tok)
|
|
templateInstantiations.erase(ti++);
|
|
else
|
|
++ti;
|
|
}
|
|
}
|
|
}
|
|
removeTokens.emplace_back(nameTok, tok2->next());
|
|
}
|
|
|
|
nameTok = tok2;
|
|
}
|
|
while (!removeTokens.empty()) {
|
|
Token::eraseTokens(removeTokens.back().first, removeTokens.back().second);
|
|
removeTokens.pop_back();
|
|
}
|
|
}
|
|
|
|
|
|
void TemplateSimplifier::simplifyTemplates(
|
|
TokenList& tokenlist,
|
|
ErrorLogger* errorlogger,
|
|
const Settings *_settings,
|
|
const std::time_t maxtime,
|
|
bool &_codeWithTemplates
|
|
)
|
|
{
|
|
std::set<std::string> expandedtemplates(TemplateSimplifier::expandSpecialized(tokenlist.front()));
|
|
|
|
if (TemplateSimplifier::getTemplateDeclarations(tokenlist.front(), _codeWithTemplates).empty())
|
|
return;
|
|
|
|
// There are templates..
|
|
// Remove "typename" unless used in template arguments..
|
|
for (Token *tok = tokenlist.front(); tok; tok = tok->next()) {
|
|
if (tok->str() == "typename")
|
|
tok->deleteThis();
|
|
|
|
if (Token::simpleMatch(tok, "template <")) {
|
|
while (tok && tok->str() != ">")
|
|
tok = tok->next();
|
|
if (!tok)
|
|
break;
|
|
}
|
|
}
|
|
|
|
std::list<TokenAndName> templateDeclarations(TemplateSimplifier::getTemplateDeclarations(tokenlist.front(), _codeWithTemplates));
|
|
|
|
// Locate possible instantiations of templates..
|
|
std::list<TokenAndName> templateInstantiations(TemplateSimplifier::getTemplateInstantiations(tokenlist.front(), templateDeclarations));
|
|
|
|
// No template instantiations? Then return.
|
|
if (templateInstantiations.empty())
|
|
return;
|
|
|
|
// Template arguments with default values
|
|
TemplateSimplifier::useDefaultArgumentValues(templateDeclarations, &templateInstantiations);
|
|
|
|
TemplateSimplifier::simplifyTemplateAliases(&templateInstantiations);
|
|
|
|
// expand templates
|
|
//bool done = false;
|
|
//while (!done)
|
|
{
|
|
//done = true;
|
|
std::list<TokenAndName> instantiatedTemplates;
|
|
for (std::list<TokenAndName>::reverse_iterator iter1 = templateDeclarations.rbegin(); iter1 != templateDeclarations.rend(); ++iter1) {
|
|
// get specializations..
|
|
std::list<const Token *> specializations;
|
|
for (std::list<TokenAndName>::const_iterator iter2 = templateDeclarations.begin(); iter2 != templateDeclarations.end(); ++iter2) {
|
|
if (iter1->name == iter2->name) {
|
|
const Token *tok = iter2->token->next()->findClosingBracket();
|
|
const int namepos = getTemplateNamePosition(tok);
|
|
if (namepos > 0)
|
|
specializations.push_back(tok->tokAt(namepos));
|
|
}
|
|
}
|
|
|
|
const bool instantiated = TemplateSimplifier::simplifyTemplateInstantiations(tokenlist,
|
|
errorlogger,
|
|
_settings,
|
|
*iter1,
|
|
specializations,
|
|
maxtime,
|
|
templateInstantiations,
|
|
expandedtemplates);
|
|
if (instantiated)
|
|
instantiatedTemplates.push_back(*iter1);
|
|
}
|
|
|
|
for (std::list<TokenAndName>::const_iterator it = instantiatedTemplates.begin(); it != instantiatedTemplates.end(); ++it) {
|
|
std::list<TokenAndName>::iterator decl;
|
|
for (decl = templateDeclarations.begin(); decl != templateDeclarations.end(); ++decl) {
|
|
if (decl->token == it->token)
|
|
break;
|
|
}
|
|
if (decl != templateDeclarations.end()) {
|
|
templateDeclarations.erase(decl);
|
|
removeTemplate(it->token);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void TemplateSimplifier::syntaxError(const Token *tok)
|
|
{
|
|
throw InternalError(tok, "syntax error", InternalError::SYNTAX);
|
|
}
|