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//===--- SizeofContainerCheck.cpp - clang-tidy-----------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "SizeofContainerCheck.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace bugprone {
void SizeofContainerCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
expr(unless(isInTemplateInstantiation()),
expr(sizeOfExpr(has(ignoringParenImpCasts(
expr(hasType(hasCanonicalType(hasDeclaration(cxxRecordDecl(
matchesName("^(::std::|::string)"),
unless(matchesName("^::std::(bitset|array)$")),
hasMethod(cxxMethodDecl(hasName("size"), isPublic(),
isConst())))))))))))
.bind("sizeof"),
// Ignore ARRAYSIZE(<array of containers>) pattern.
unless(hasAncestor(binaryOperator(
hasAnyOperatorName("/", "%"),
hasLHS(ignoringParenCasts(sizeOfExpr(expr()))),
hasRHS(ignoringParenCasts(equalsBoundNode("sizeof"))))))),
this);
}
void SizeofContainerCheck::check(const MatchFinder::MatchResult &Result) {
const auto *SizeOf =
Result.Nodes.getNodeAs<UnaryExprOrTypeTraitExpr>("sizeof");
auto Diag =
diag(SizeOf->getBeginLoc(), "sizeof() doesn't return the size of the "
"container; did you mean .size()?");
}
} // namespace bugprone
} // namespace tidy
} // namespace clang
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