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

source code of clang-tools-extra/clang-tidy/abseil/DurationAdditionCheck.cpp