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//===---------- ASTUtils.cpp - clang-tidy ---------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ASTUtils.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/Lex/Lexer.h"
namespace clang {
namespace tidy {
namespace utils {
using namespace ast_matchers;
const FunctionDecl *getSurroundingFunction(ASTContext &Context,
const Stmt &Statement) {
return selectFirst<const FunctionDecl>(
"function", match(stmt(hasAncestor(functionDecl().bind("function"))),
Statement, Context));
}
bool IsBinaryOrTernary(const Expr *E) {
const Expr *E_base = E->IgnoreImpCasts();
if (clang::isa<clang::BinaryOperator>(E_base) ||
clang::isa<clang::ConditionalOperator>(E_base)) {
return true;
}
if (const auto *Operator =
clang::dyn_cast<clang::CXXOperatorCallExpr>(E_base)) {
return Operator->isInfixBinaryOp();
}
return false;
}
bool exprHasBitFlagWithSpelling(const Expr *Flags, const SourceManager &SM,
const LangOptions &LangOpts,
StringRef FlagName) {
// If the Flag is an integer constant, check it.
if (isa<IntegerLiteral>(Flags)) {
if (!SM.isMacroBodyExpansion(Flags->getLocStart()) &&
!SM.isMacroArgExpansion(Flags->getLocStart()))
return false;
// Get the marco name.
auto MacroName = Lexer::getSourceText(
CharSourceRange::getTokenRange(Flags->getSourceRange()), SM, LangOpts);
return MacroName == FlagName;
}
// If it's a binary OR operation.
if (const auto *BO = dyn_cast<BinaryOperator>(Flags))
if (BO->getOpcode() == clang::BinaryOperatorKind::BO_Or)
return exprHasBitFlagWithSpelling(BO->getLHS()->IgnoreParenCasts(), SM,
LangOpts, FlagName) ||
exprHasBitFlagWithSpelling(BO->getRHS()->IgnoreParenCasts(), SM,
LangOpts, FlagName);
// Otherwise, assume it has the flag.
return true;
}
} // namespace utils
} // namespace tidy
} // namespace clang
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