clang-tools 20.0.0git
DurationDivisionCheck.cpp
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1//===--- DurationDivisionCheck.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
10#include "clang/AST/ASTContext.h"
11#include "clang/ASTMatchers/ASTMatchFinder.h"
12#include "clang/Lex/Lexer.h"
13
14namespace clang::tidy::abseil {
15
16using namespace clang::ast_matchers;
17
18void DurationDivisionCheck::registerMatchers(MatchFinder *Finder) {
19 const auto DurationExpr =
20 expr(hasType(cxxRecordDecl(hasName("::absl::Duration"))));
21 Finder->addMatcher(
22 traverse(TK_AsIs,
23 implicitCastExpr(
24 hasSourceExpression(ignoringParenCasts(
25 cxxOperatorCallExpr(hasOverloadedOperatorName("/"),
26 hasArgument(0, DurationExpr),
27 hasArgument(1, DurationExpr))
28 .bind("OpCall"))),
29 hasImplicitDestinationType(qualType(unless(isInteger()))),
30 unless(hasParent(cxxStaticCastExpr())),
31 unless(hasParent(cStyleCastExpr())),
32 unless(isInTemplateInstantiation()))),
33 this);
34}
35
36void DurationDivisionCheck::check(const MatchFinder::MatchResult &Result) {
37 const auto *OpCall = Result.Nodes.getNodeAs<CXXOperatorCallExpr>("OpCall");
38 diag(OpCall->getOperatorLoc(),
39 "operator/ on absl::Duration objects performs integer division; "
40 "did you mean to use FDivDuration()?")
41 << FixItHint::CreateInsertion(OpCall->getBeginLoc(),
42 "absl::FDivDuration(")
43 << FixItHint::CreateReplacement(
44 SourceRange(OpCall->getOperatorLoc(), OpCall->getOperatorLoc()),
45 ", ")
46 << FixItHint::CreateInsertion(
47 Lexer::getLocForEndOfToken(
48 Result.SourceManager->getSpellingLoc(OpCall->getEndLoc()), 0,
49 *Result.SourceManager, Result.Context->getLangOpts()),
50 ")");
51}
52
53} // namespace clang::tidy::abseil
DiagnosticBuilder diag(SourceLocation Loc, StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning)
Add a diagnostic with the check's name.
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.