clang-tools 20.0.0git
FloatLoopCounter.cpp
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1//===--- FloatLoopCounter.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 "FloatLoopCounter.h"
10#include "clang/AST/ASTContext.h"
11#include "clang/ASTMatchers/ASTMatchFinder.h"
12#include "clang/ASTMatchers/ASTMatchers.h"
13
14using namespace clang::ast_matchers;
15
16namespace clang::tidy::cert {
17
18void FloatLoopCounter::registerMatchers(MatchFinder *Finder) {
19 Finder->addMatcher(
20 forStmt(hasIncrement(forEachDescendant(
21 declRefExpr(hasType(realFloatingPointType()),
22 to(varDecl().bind("var")))
23 .bind("inc"))),
24 hasCondition(forEachDescendant(
25 declRefExpr(hasType(realFloatingPointType()),
26 to(varDecl(equalsBoundNode("var"))))
27 .bind("cond"))))
28 .bind("for"),
29 this);
30}
31
32void FloatLoopCounter::check(const MatchFinder::MatchResult &Result) {
33 const auto *FS = Result.Nodes.getNodeAs<ForStmt>("for");
34
35 diag(FS->getInc()->getBeginLoc(), "loop induction expression should not have "
36 "floating-point type")
37 << Result.Nodes.getNodeAs<DeclRefExpr>("inc")->getSourceRange()
38 << Result.Nodes.getNodeAs<DeclRefExpr>("cond")->getSourceRange();
39
40 if (!FS->getInc()->getType()->isRealFloatingType())
41 if (const auto *V = Result.Nodes.getNodeAs<VarDecl>("var"))
42 diag(V->getBeginLoc(), "floating-point type loop induction variable",
43 DiagnosticIDs::Note);
44}
45
46} // namespace clang::tidy::cert
DiagnosticBuilder diag(SourceLocation Loc, StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning)
Add a diagnostic with the check's name.
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.