| 1 | //===--- DurationFactoryFloatCheck.cpp - clang-tidy -----------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "DurationFactoryFloatCheck.h" |
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| 10 | #include "DurationRewriter.h" |
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| 11 | #include "clang/AST/ASTContext.h" |
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| 12 | #include "clang/ASTMatchers/ASTMatchFinder.h" |
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| 13 | #include "clang/Lex/Lexer.h" |
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| 14 | #include <optional> |
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| 15 | |
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| 16 | using namespace clang::ast_matchers; |
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| 17 | |
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| 18 | namespace clang::tidy::abseil { |
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| 19 | |
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| 20 | // Returns `true` if `Range` is inside a macro definition. |
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| 21 | static bool insideMacroDefinition(const MatchFinder::MatchResult &Result, |
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| 22 | SourceRange Range) { |
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| 23 | return !clang::Lexer::makeFileCharRange( |
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| 24 | Range: clang::CharSourceRange::getCharRange(R: Range), |
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| 25 | SM: *Result.SourceManager, LangOpts: Result.Context->getLangOpts()) |
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| 26 | .isValid(); |
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| 27 | } |
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| 28 | |
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| 29 | void DurationFactoryFloatCheck::registerMatchers(MatchFinder *Finder) { |
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| 30 | Finder->addMatcher( |
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| 31 | NodeMatch: callExpr(callee(InnerMatcher: functionDecl(DurationFactoryFunction())), |
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| 32 | hasArgument(N: 0, InnerMatcher: anyOf(cxxStaticCastExpr(hasDestinationType( |
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| 33 | InnerMatcher: realFloatingPointType())), |
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| 34 | cStyleCastExpr(hasDestinationType( |
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| 35 | InnerMatcher: realFloatingPointType())), |
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| 36 | cxxFunctionalCastExpr(hasDestinationType( |
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| 37 | InnerMatcher: realFloatingPointType())), |
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| 38 | floatLiteral()))) |
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| 39 | .bind(ID: "call" ), |
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| 40 | Action: this); |
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| 41 | } |
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| 42 | |
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| 43 | void DurationFactoryFloatCheck::check(const MatchFinder::MatchResult &Result) { |
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| 44 | const auto *MatchedCall = Result.Nodes.getNodeAs<CallExpr>(ID: "call" ); |
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| 45 | |
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| 46 | // Don't try and replace things inside of macro definitions. |
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| 47 | if (insideMacroDefinition(Result, MatchedCall->getSourceRange())) |
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| 48 | return; |
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| 49 | |
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| 50 | const Expr *Arg = MatchedCall->getArg(Arg: 0)->IgnoreImpCasts(); |
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| 51 | // Arguments which are macros are ignored. |
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| 52 | if (Arg->getBeginLoc().isMacroID()) |
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| 53 | return; |
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| 54 | |
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| 55 | std::optional<std::string> SimpleArg = stripFloatCast(Result, Node: *Arg); |
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| 56 | if (!SimpleArg) |
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| 57 | SimpleArg = stripFloatLiteralFraction(Result, Node: *Arg); |
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| 58 | |
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| 59 | if (SimpleArg) { |
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| 60 | diag(Loc: MatchedCall->getBeginLoc(), Description: "use the integer version of absl::%0" ) |
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| 61 | << MatchedCall->getDirectCallee()->getName() |
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| 62 | << FixItHint::CreateReplacement(Arg->getSourceRange(), *SimpleArg); |
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| 63 | } |
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| 64 | } |
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| 65 | |
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| 66 | } // namespace clang::tidy::abseil |
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| 67 | |
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