clang-tools 10.0.0

DurationFactoryFloatCheck.cpp
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1 //===--- DurationFactoryFloatCheck.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 "DurationFactoryFloatCheck.h"
10 #include "DurationRewriter.h"
11 #include "clang/AST/ASTContext.h"
12 #include "clang/ASTMatchers/ASTMatchFinder.h"
13 #include "clang/Tooling/FixIt.h"
14
15 using namespace clang::ast_matchers;
16
17 namespace clang {
18 namespace tidy {
19 namespace abseil {
20
21 // Returns `true` if `Range` is inside a macro definition.
22 static bool InsideMacroDefinition(const MatchFinder::MatchResult &Result,
23 SourceRange Range) {
24 return !clang::Lexer::makeFileCharRange(
25 clang::CharSourceRange::getCharRange(Range),
26 *Result.SourceManager, Result.Context->getLangOpts())
27 .isValid();
28 }
29
30 void DurationFactoryFloatCheck::registerMatchers(MatchFinder *Finder) {
31 Finder->addMatcher(
32 callExpr(callee(functionDecl(DurationFactoryFunction())),
33 hasArgument(0, anyOf(cxxStaticCastExpr(hasDestinationType(
34 realFloatingPointType())),
35 cStyleCastExpr(hasDestinationType(
36 realFloatingPointType())),
37 cxxFunctionalCastExpr(hasDestinationType(
38 realFloatingPointType())),
39 floatLiteral())))
40 .bind("call"),
41 this);
42 }
43
44 void DurationFactoryFloatCheck::check(const MatchFinder::MatchResult &Result) {
45 const auto *MatchedCall = Result.Nodes.getNodeAs<CallExpr>("call");
46
47 // Don't try and replace things inside of macro definitions.
48 if (InsideMacroDefinition(Result, MatchedCall->getSourceRange()))
49 return;
50
51 const Expr *Arg = MatchedCall->getArg(0)->IgnoreImpCasts();
52 // Arguments which are macros are ignored.
53 if (Arg->getBeginLoc().isMacroID())
54 return;
55
56 llvm::Optional<std::string> SimpleArg = stripFloatCast(Result, *Arg);
57 if (!SimpleArg)
58 SimpleArg = stripFloatLiteralFraction(Result, *Arg);
59
60 if (SimpleArg) {
61 diag(MatchedCall->getBeginLoc(),
62 (llvm::Twine("use the integer version of absl::") +
63 MatchedCall->getDirectCallee()->getName())
64 .str())
65 << FixItHint::CreateReplacement(Arg->getSourceRange(), *SimpleArg);
66 }
67 }
68
69 } // namespace abseil
70 } // namespace tidy
71 } // namespace clang
DurationRewriter.h
clang::ast_matchers
Definition: AbseilMatcher.h:14
DurationFactoryFloatCheck.h
clang::tidy::abseil::InsideMacroDefinition
static bool InsideMacroDefinition(const MatchFinder::MatchResult &Result, SourceRange Range)
Definition: DurationFactoryFloatCheck.cpp:22
clang
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
Definition: ApplyReplacements.h:27
Range
CharSourceRange Range
SourceRange for the file name.
Definition: IncludeOrderCheck.cpp:38
clang::tidy::abseil::stripFloatCast
llvm::Optional< std::string > stripFloatCast(const ast_matchers::MatchFinder::MatchResult &Result, const Expr &Node)
Possibly strip a floating point cast expression.
Definition: DurationRewriter.cpp:186
clang::tidy::abseil::stripFloatLiteralFraction
llvm::Optional< std::string > stripFloatLiteralFraction(const MatchFinder::MatchResult &Result, const Expr &Node)
Definition: DurationRewriter.cpp:206