cppcheck/lib/checkboost.cpp

/*
 * Cppcheck - A tool for static C/C++ code analysis
 * Copyright (C) 2007-2012 Daniel Marjamäki and Cppcheck team.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "checkboost.h"

// Register this check class (by creating a static instance of it)
namespace {
    CheckBoost instance;
}

void CheckBoost::checkBoostForeachModification()
{
    for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
        if (!Token::simpleMatch(tok, "BOOST_FOREACH ("))
            continue;

        const Token *container_tok = tok->next()->link()->previous();
        if (!Token::Match(container_tok, "%var% ) {"))
            continue;

        const unsigned int container_id = container_tok->varId();
        if (container_id == 0)
            continue;

        const Token *tok2 = container_tok->tokAt(2);
        const Token *end = tok2->link();
        for (; tok2 != end; tok2 = tok2->next()) {
            if (Token::Match(tok2, "%varid% . insert|erase|push_back|push_front|pop_front|pop_back|clear|swap|resize|assign|merge|remove|remove_if|reverse|sort|splice|unique|pop|push", container_id)) {
                boostForeachError(tok2);
                break;
            }
        }
    }
}

void CheckBoost::boostForeachError(const Token *tok)
{
    reportError(tok, Severity::error, "boostForeachError",
                "BOOST_FOREACH caches the end() iterator. It's undefined behavior if you modify the container inside."
               );
}