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//===--- InaccurateEraseCheck.cpp - clang-tidy-----------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "InaccurateEraseCheck.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/Lex/Lexer.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace misc {
void InaccurateEraseCheck::registerMatchers(MatchFinder *Finder) {
// Only register the matchers for C++; the functionality currently does not
// provide any benefit to other languages, despite being benign.
if (!getLangOpts().CPlusPlus)
return;
const auto CheckForEndCall = hasArgument(
1, anyOf(cxxConstructExpr(has(ignoringParenImpCasts(
cxxMemberCallExpr(callee(cxxMethodDecl(hasName("end"))))
.bind("InaccEndCall")))),
anything()));
Finder->addMatcher(
cxxMemberCallExpr(
on(hasType(namedDecl(matchesName("^::std::")))),
callee(cxxMethodDecl(hasName("erase"))), argumentCountIs(1),
hasArgument(0, has(ignoringParenImpCasts(
callExpr(callee(functionDecl(matchesName(
"^::std::(remove(_if)?|unique)$"))),
CheckForEndCall)
.bind("InaccAlgCall")))),
unless(isInTemplateInstantiation()))
.bind("InaccErase"),
this);
}
void InaccurateEraseCheck::check(const MatchFinder::MatchResult &Result) {
const auto *MemberCall =
Result.Nodes.getNodeAs<CXXMemberCallExpr>("InaccErase");
const auto *EndExpr =
Result.Nodes.getNodeAs<CXXMemberCallExpr>("InaccEndCall");
const SourceLocation Loc = MemberCall->getLocStart();
FixItHint Hint;
if (!Loc.isMacroID() && EndExpr) {
const auto *AlgCall = Result.Nodes.getNodeAs<CallExpr>("InaccAlgCall");
std::string ReplacementText = Lexer::getSourceText(
CharSourceRange::getTokenRange(EndExpr->getSourceRange()),
*Result.SourceManager, getLangOpts());
const SourceLocation EndLoc = Lexer::getLocForEndOfToken(
AlgCall->getLocEnd(), 0, *Result.SourceManager, getLangOpts());
Hint = FixItHint::CreateInsertion(EndLoc, ", " + ReplacementText);
}
diag(Loc, "this call will remove at most one item even when multiple items "
"should be removed")
<< Hint;
}
} // namespace misc
} // namespace tidy
} // namespace clang
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