llvm-project/clang/lib/AST/LambdaMangleContext.cpp
Douglas Gregor 6379854457 Basic support for name mangling of C++11 lambda expressions. Because
name mangling in the Itanium C++ ABI for lambda expressions is so
dependent on context, we encode the number used to encode each lambda
as part of the lambda closure type, and maintain this value within
Sema.

Note that there are a several pieces still missing:
  - We still get the linkage of lambda expressions wrong
  - We aren't properly numbering or mangling lambda expressions that
  occur in default function arguments or in data member initializers.
  - We aren't (de-)serializing the lambda numbering tables

llvm-svn: 150982
2012-02-20 19:44:39 +00:00

31 lines
1.2 KiB
C++

//===--- LambdaMangleContext.cpp - Context for mangling lambdas -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the LambdaMangleContext class, which keeps track of
// the Itanium C++ ABI mangling numbers for lambda expressions.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/LambdaMangleContext.h"
#include "clang/AST/DeclCXX.h"
using namespace clang;
unsigned LambdaMangleContext::getManglingNumber(CXXMethodDecl *CallOperator) {
const FunctionProtoType *Proto
= CallOperator->getType()->getAs<FunctionProtoType>();
ASTContext &Context = CallOperator->getASTContext();
QualType Key = Context.getFunctionType(Context.VoidTy,
Proto->arg_type_begin(),
Proto->getNumArgs(),
FunctionProtoType::ExtProtoInfo());
Key = Context.getCanonicalType(Key);
return ++ManglingNumbers[Key->castAs<FunctionProtoType>()];
}