47 lines · cpp
1//===----------------------------------------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "FloatLoopCounterCheck.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::bugprone {17 18void FloatLoopCounterCheck::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 FloatLoopCounterCheck::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::bugprone47