| 1 | //===--- DurationSubtractionCheck.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 "DurationSubtractionCheck.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/Tooling/FixIt.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 | void DurationSubtractionCheck::registerMatchers(MatchFinder *Finder) { |
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| 21 | Finder->addMatcher( |
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| 22 | NodeMatch: binaryOperator( |
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| 23 | hasOperatorName(Name: "-" ), |
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| 24 | hasLHS(InnerMatcher: callExpr(callee(InnerMatcher: functionDecl(DurationConversionFunction()) |
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| 25 | .bind(ID: "function_decl" )), |
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| 26 | hasArgument(N: 0, InnerMatcher: expr().bind(ID: "lhs_arg" ))))) |
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| 27 | .bind(ID: "binop" ), |
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| 28 | Action: this); |
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| 29 | } |
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| 30 | |
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| 31 | void DurationSubtractionCheck::check(const MatchFinder::MatchResult &Result) { |
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| 32 | const auto *Binop = Result.Nodes.getNodeAs<BinaryOperator>(ID: "binop" ); |
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| 33 | const auto *FuncDecl = Result.Nodes.getNodeAs<FunctionDecl>(ID: "function_decl" ); |
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| 34 | |
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| 35 | // Don't try to replace things inside of macro definitions. |
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| 36 | if (Binop->getExprLoc().isMacroID() || Binop->getExprLoc().isInvalid()) |
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| 37 | return; |
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| 38 | |
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| 39 | std::optional<DurationScale> Scale = |
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| 40 | getScaleForDurationInverse(FuncDecl->getName()); |
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| 41 | if (!Scale) |
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| 42 | return; |
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| 43 | |
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| 44 | std::string RhsReplacement = |
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| 45 | rewriteExprFromNumberToDuration(Result, Scale: *Scale, Node: Binop->getRHS()); |
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| 46 | |
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| 47 | const Expr *LhsArg = Result.Nodes.getNodeAs<Expr>(ID: "lhs_arg" ); |
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| 48 | |
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| 49 | diag(Loc: Binop->getBeginLoc(), Description: "perform subtraction in the duration domain" ) |
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| 50 | << FixItHint::CreateReplacement( |
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| 51 | Binop->getSourceRange(), |
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| 52 | (llvm::Twine("absl::" ) + FuncDecl->getName() + "(" + |
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| 53 | tooling::fixit::getText(Node: *LhsArg, Context: *Result.Context) + " - " + |
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| 54 | RhsReplacement + ")" ) |
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| 55 | .str()); |
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| 56 | } |
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| 57 | |
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| 58 | } // namespace clang::tidy::abseil |
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| 59 | |
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