ASTLambda.h

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//===--- ASTLambda.h - Lambda Helper Functions --------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file provides some common utility functions for processing
/// Lambda related AST Constructs.
///
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_CLANG_AST_ASTLAMBDA_H
#define LLVM_CLANG_AST_ASTLAMBDA_H
 
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclTemplate.h"
 
namespace clang {
inline StringRef getLambdaStaticInvokerName() {
  return "__invoke";
}
// This function returns true if M is a specialization, a template,
// or a non-generic lambda call operator.
inline bool isLambdaCallOperator(const CXXMethodDecl *MD) {
  const CXXRecordDecl *LambdaClass = MD->getParent();
  if (!LambdaClass || !LambdaClass->isLambda()) return false;
  return MD->getOverloadedOperator() == OO_Call;
}
 
inline bool isLambdaCallOperator(const DeclContext *DC) {
  if (!DC || !isa<CXXMethodDecl>(DC)) return false;
  return isLambdaCallOperator(cast<CXXMethodDecl>(DC));
}
 
inline bool isLambdaCallWithExplicitObjectParameter(const DeclContext *DC) {
  return isLambdaCallOperator(DC) &&
         cast<CXXMethodDecl>(DC)->isExplicitObjectMemberFunction();
}
 
inline bool isLambdaCallWithImplicitObjectParameter(const DeclContext *DC) {
  return isLambdaCallOperator(DC) &&
         // FIXME: Checking for a null type is not great
         // but lambdas with invalid captures or whose closure parameter list
         // have not fully been parsed may have a call operator whose type is
         // null.
         !cast<CXXMethodDecl>(DC)->getType().isNull() &&
         !cast<CXXMethodDecl>(DC)->isExplicitObjectMemberFunction();
}