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1 //===--- DurationAdditionCheck.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 "DurationAdditionCheck.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
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15 using namespace clang::ast_matchers;
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16
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17 namespace clang {
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18 namespace tidy {
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19 namespace abseil {
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20
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21 void DurationAdditionCheck::registerMatchers(MatchFinder *Finder) {
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22 Finder->addMatcher(
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23 binaryOperator(hasOperatorName("+"),
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24 hasEitherOperand(expr(ignoringParenImpCasts(
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25 callExpr(callee(functionDecl(TimeConversionFunction())
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26 .bind("function_decl")))
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27 .bind("call")))))
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28 .bind("binop"),
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29 this);
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30 }
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31
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32 void DurationAdditionCheck::check(const MatchFinder::MatchResult &Result) {
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33 const BinaryOperator *Binop =
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34 Result.Nodes.getNodeAs<clang::BinaryOperator>("binop");
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35 const CallExpr *Call = Result.Nodes.getNodeAs<clang::CallExpr>("call");
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36
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37 // Don't try to replace things inside of macro definitions.
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38 if (Binop->getExprLoc().isMacroID() || Binop->getExprLoc().isInvalid())
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39 return;
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40
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41 llvm::Optional<DurationScale> Scale = getScaleForTimeInverse(
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42 Result.Nodes.getNodeAs<clang::FunctionDecl>("function_decl")->getName());
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43 if (!Scale)
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44 return;
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45
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46 llvm::StringRef TimeFactory = getTimeInverseForScale(*Scale);
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47
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48 FixItHint Hint;
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49 if (Call == Binop->getLHS()->IgnoreParenImpCasts()) {
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50 Hint = FixItHint::CreateReplacement(
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51 Binop->getSourceRange(),
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52 (llvm::Twine(TimeFactory) + "(" +
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53 tooling::fixit::getText(*Call->getArg(0), *Result.Context) + " + " +
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54 rewriteExprFromNumberToDuration(Result, *Scale, Binop->getRHS()) + ")")
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55 .str());
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56 } else {
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57 assert(Call == Binop->getRHS()->IgnoreParenImpCasts() &&
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58 "Call should be found on the RHS");
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59 Hint = FixItHint::CreateReplacement(
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60 Binop->getSourceRange(),
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61 (llvm::Twine(TimeFactory) + "(" +
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62 rewriteExprFromNumberToDuration(Result, *Scale, Binop->getLHS()) +
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63 " + " + tooling::fixit::getText(*Call->getArg(0), *Result.Context) +
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64 ")")
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65 .str());
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66 }
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67
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68 diag(Binop->getBeginLoc(), "perform addition in the duration domain") << Hint;
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69 }
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70
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71 } // namespace abseil
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72 } // namespace tidy
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73 } // namespace clang
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