| 1 | //===--- SizeofContainerCheck.cpp - clang-tidy-----------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "SizeofContainerCheck.h" |
| 10 | #include "clang/ASTMatchers/ASTMatchFinder.h" |
| 11 | |
| 12 | using namespace clang::ast_matchers; |
| 13 | |
| 14 | namespace clang::tidy::bugprone { |
| 15 | |
| 16 | void SizeofContainerCheck::registerMatchers(MatchFinder *Finder) { |
| 17 | Finder->addMatcher( |
| 18 | NodeMatch: expr(unless(isInTemplateInstantiation()), |
| 19 | expr(sizeOfExpr(InnerMatcher: has(ignoringParenImpCasts( |
| 20 | InnerMatcher: expr(hasType(InnerMatcher: hasCanonicalType(InnerMatcher: hasDeclaration(InnerMatcher: cxxRecordDecl( |
| 21 | matchesName(RegExp: "^(::std::|::string)"), |
| 22 | unless(matchesName(RegExp: "^::std::(bitset|array)$")), |
| 23 | hasMethod(InnerMatcher: cxxMethodDecl(hasName(Name: "size"), isPublic(), |
| 24 | isConst()))))))))))) |
| 25 | .bind(ID: "sizeof"), |
| 26 | // Ignore ARRAYSIZE(<array of containers>) pattern. |
| 27 | unless(hasAncestor(binaryOperator( |
| 28 | hasAnyOperatorName("/", "%"), |
| 29 | hasLHS(InnerMatcher: ignoringParenCasts(InnerMatcher: sizeOfExpr(InnerMatcher: expr()))), |
| 30 | hasRHS(InnerMatcher: ignoringParenCasts(InnerMatcher: equalsBoundNode(ID: "sizeof"))))))), |
| 31 | Action: this); |
| 32 | } |
| 33 | |
| 34 | void SizeofContainerCheck::check(const MatchFinder::MatchResult &Result) { |
| 35 | const auto *SizeOf = |
| 36 | Result.Nodes.getNodeAs<UnaryExprOrTypeTraitExpr>(ID: "sizeof"); |
| 37 | |
| 38 | auto Diag = |
| 39 | diag(Loc: SizeOf->getBeginLoc(), Description: "sizeof() doesn't return the size of the " |
| 40 | "container; did you mean .size()?"); |
| 41 | } |
| 42 | |
| 43 | } // namespace clang::tidy::bugprone |
| 44 |