clang-tools  14.0.0git
SizeofContainerCheck.cpp
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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/AST/ASTContext.h"
11 #include "clang/ASTMatchers/ASTMatchFinder.h"
12 
13 using namespace clang::ast_matchers;
14 
15 namespace clang {
16 namespace tidy {
17 namespace bugprone {
18 
19 void SizeofContainerCheck::registerMatchers(MatchFinder *Finder) {
20  Finder->addMatcher(
21  expr(unless(isInTemplateInstantiation()),
22  expr(sizeOfExpr(has(ignoringParenImpCasts(
23  expr(hasType(hasCanonicalType(hasDeclaration(cxxRecordDecl(
24  matchesName("^(::std::|::string)"),
25  unless(matchesName("^::std::(bitset|array)$")),
26  hasMethod(cxxMethodDecl(hasName("size"), isPublic(),
27  isConst())))))))))))
28  .bind("sizeof"),
29  // Ignore ARRAYSIZE(<array of containers>) pattern.
30  unless(hasAncestor(binaryOperator(
31  hasAnyOperatorName("/", "%"),
32  hasLHS(ignoringParenCasts(sizeOfExpr(expr()))),
33  hasRHS(ignoringParenCasts(equalsBoundNode("sizeof"))))))),
34  this);
35 }
36 
37 void SizeofContainerCheck::check(const MatchFinder::MatchResult &Result) {
38  const auto *SizeOf =
39  Result.Nodes.getNodeAs<UnaryExprOrTypeTraitExpr>("sizeof");
40 
41  auto Diag =
42  diag(SizeOf->getBeginLoc(), "sizeof() doesn't return the size of the "
43  "container; did you mean .size()?");
44 }
45 
46 } // namespace bugprone
47 } // namespace tidy
48 } // namespace clang
clang::ast_matchers
Definition: AbseilMatcher.h:14
SizeofContainerCheck.h
clang::clangd::check
bool check(llvm::StringRef File, llvm::function_ref< bool(const Position &)> ShouldCheckLine, const ThreadsafeFS &TFS, const ClangdLSPServer::Options &Opts, bool EnableCodeCompletion)
Definition: Check.cpp:259
clang::doc::serialize::isPublic
static bool isPublic(const clang::AccessSpecifier AS, const clang::Linkage Link)
Definition: Serialize.cpp:223
clang
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
Definition: ApplyReplacements.h:27