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//===--- FloatLoopCounter.cpp - clang-tidy---------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "FloatLoopCounter.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
using namespace clang::ast_matchers;
namespace clang::tidy::cert {
void FloatLoopCounter::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
forStmt(hasIncrement(forEachDescendant(
declRefExpr(hasType(realFloatingPointType()),
to(varDecl().bind("var")))
.bind("inc"))),
hasCondition(forEachDescendant(
declRefExpr(hasType(realFloatingPointType()),
to(varDecl(equalsBoundNode("var"))))
.bind("cond"))))
.bind("for"),
this);
}
void FloatLoopCounter::check(const MatchFinder::MatchResult &Result) {
const auto *FS = Result.Nodes.getNodeAs<ForStmt>("for");
diag(FS->getInc()->getBeginLoc(), "loop induction expression should not have "
"floating-point type")
<< Result.Nodes.getNodeAs<DeclRefExpr>("inc")->getSourceRange()
<< Result.Nodes.getNodeAs<DeclRefExpr>("cond")->getSourceRange();
if (!FS->getInc()->getType()->isRealFloatingType())
if (const auto *V = Result.Nodes.getNodeAs<VarDecl>("var"))
diag(V->getBeginLoc(), "floating-point type loop induction variable",
DiagnosticIDs::Note);
}
} // namespace clang::tidy::cert
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