| 1 | //===--- TimeComparisonCheck.cpp - clang-tidy |
|---|
| 2 | //--------------------------------===// |
|---|
| 3 | // |
|---|
| 4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
|---|
| 5 | // See https://llvm.org/LICENSE.txt for license information. |
|---|
| 6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
|---|
| 7 | // |
|---|
| 8 | //===----------------------------------------------------------------------===// |
|---|
| 9 | |
|---|
| 10 | #include "TimeComparisonCheck.h" |
|---|
| 11 | #include "DurationRewriter.h" |
|---|
| 12 | #include "clang/ASTMatchers/ASTMatchFinder.h" |
|---|
| 13 | #include <optional> |
|---|
| 14 | |
|---|
| 15 | using namespace clang::ast_matchers; |
|---|
| 16 | |
|---|
| 17 | namespace clang::tidy::abseil { |
|---|
| 18 | |
|---|
| 19 | void TimeComparisonCheck::registerMatchers(MatchFinder *Finder) { |
|---|
| 20 | auto Matcher = |
|---|
| 21 | expr(comparisonOperatorWithCallee(funcDecl: functionDecl( |
|---|
| 22 | functionDecl(TimeConversionFunction()).bind(ID: "function_decl" )))) |
|---|
| 23 | .bind(ID: "binop" ); |
|---|
| 24 | |
|---|
| 25 | Finder->addMatcher(NodeMatch: Matcher, Action: this); |
|---|
| 26 | } |
|---|
| 27 | |
|---|
| 28 | void TimeComparisonCheck::check(const MatchFinder::MatchResult &Result) { |
|---|
| 29 | const auto *Binop = Result.Nodes.getNodeAs<BinaryOperator>(ID: "binop" ); |
|---|
| 30 | |
|---|
| 31 | std::optional<DurationScale> Scale = getScaleForTimeInverse( |
|---|
| 32 | Result.Nodes.getNodeAs<FunctionDecl>(ID: "function_decl" )->getName()); |
|---|
| 33 | if (!Scale) |
|---|
| 34 | return; |
|---|
| 35 | |
|---|
| 36 | if (isInMacro(Result, E: Binop->getLHS()) || isInMacro(Result, E: Binop->getRHS())) |
|---|
| 37 | return; |
|---|
| 38 | |
|---|
| 39 | // In most cases, we'll only need to rewrite one of the sides, but we also |
|---|
| 40 | // want to handle the case of rewriting both sides. This is much simpler if |
|---|
| 41 | // we unconditionally try and rewrite both, and let the rewriter determine |
|---|
| 42 | // if nothing needs to be done. |
|---|
| 43 | std::string LhsReplacement = |
|---|
| 44 | rewriteExprFromNumberToTime(Result, Scale: *Scale, Node: Binop->getLHS()); |
|---|
| 45 | std::string RhsReplacement = |
|---|
| 46 | rewriteExprFromNumberToTime(Result, Scale: *Scale, Node: Binop->getRHS()); |
|---|
| 47 | |
|---|
| 48 | diag(Loc: Binop->getBeginLoc(), Description: "perform comparison in the time domain" ) |
|---|
| 49 | << FixItHint::CreateReplacement(Binop->getSourceRange(), |
|---|
| 50 | (llvm::Twine(LhsReplacement) + " " + |
|---|
| 51 | Binop->getOpcodeStr() + " " + |
|---|
| 52 | RhsReplacement) |
|---|
| 53 | .str()); |
|---|
| 54 | } |
|---|
| 55 | |
|---|
| 56 | } // namespace clang::tidy::abseil |
|---|
| 57 | |
|---|
