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//===-- ClangASTSource.cpp ---------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/ASTContext.h"
#include "lldb/Expression/ClangASTSource.h"
#include "lldb/Expression/ClangExpression.h"
#include "lldb/Expression/ClangExpressionDeclMap.h"
using namespace clang;
using namespace lldb_private;
ClangASTSource::~ClangASTSource() {}
void ClangASTSource::StartTranslationUnit(ASTConsumer *Consumer) {
// Tell Sema to ask us when looking into the translation unit's decl.
Context.getTranslationUnitDecl()->setHasExternalVisibleStorage();
Context.getTranslationUnitDecl()->setHasExternalLexicalStorage();
}
// These are only required for AST source that want to lazily load
// the declarations (or parts thereof) that they return.
Decl *ClangASTSource::GetExternalDecl(uint32_t) { return 0; }
Stmt *ClangASTSource::GetExternalDeclStmt(uint64_t) { return 0; }
// These are also optional, although it might help with ObjC
// debugging if we have respectable signatures. But a more
// efficient interface (that didn't require scanning all files
// for method signatures!) might help.
Selector ClangASTSource::GetExternalSelector(uint32_t) { return Selector(); }
uint32_t ClangASTSource::GetNumExternalSelectors() { return 0; }
// The core lookup interface.
DeclContext::lookup_result ClangASTSource::FindExternalVisibleDeclsByName(const DeclContext *DC, DeclarationName Name) {
switch (Name.getNameKind()) {
// Normal identifiers.
case DeclarationName::Identifier:
break;
// Operator names. Not important for now.
case DeclarationName::CXXOperatorName:
case DeclarationName::CXXLiteralOperatorName:
return DeclContext::lookup_result();
// Using directives found in this context.
// Tell Sema we didn't find any or we'll end up getting asked a *lot*.
case DeclarationName::CXXUsingDirective:
return SetNoExternalVisibleDeclsForName(DC, Name);
// These aren't looked up like this.
case DeclarationName::ObjCZeroArgSelector:
case DeclarationName::ObjCOneArgSelector:
case DeclarationName::ObjCMultiArgSelector:
return DeclContext::lookup_result();
// These aren't possible in the global context.
case DeclarationName::CXXConstructorName:
case DeclarationName::CXXDestructorName:
case DeclarationName::CXXConversionFunctionName:
return DeclContext::lookup_result();
}
llvm::SmallVector<NamedDecl*, 4> Decls;
NameSearchContext NSC(*this, Decls, Name, DC);
DeclMap.GetDecls(NSC, Name.getAsString().c_str());
return SetExternalVisibleDeclsForName(DC, Name, Decls);
}
void ClangASTSource::MaterializeVisibleDecls(const DeclContext *DC)
{
return;
}
// This is used to support iterating through an entire lexical context,
// which isn't something the debugger should ever need to do.
bool ClangASTSource::FindExternalLexicalDecls(const DeclContext *DC, llvm::SmallVectorImpl<Decl*> &Decls) {
// true is for error, that's good enough for me
return true;
}
clang::ASTContext *NameSearchContext::GetASTContext() {
return &ASTSource.Context;
}
clang::NamedDecl *NameSearchContext::AddVarDecl(void *type) {
IdentifierInfo *ii = Name.getAsIdentifierInfo();
clang::NamedDecl *Decl = VarDecl::Create(ASTSource.Context,
const_cast<DeclContext*>(DC),
SourceLocation(),
ii,
QualType::getFromOpaquePtr(type),
0,
SC_Static,
SC_Static);
Decls.push_back(Decl);
return Decl;
}
clang::NamedDecl *NameSearchContext::AddFunDecl(void *type) {
clang::FunctionDecl *Decl = FunctionDecl::Create(ASTSource.Context,
const_cast<DeclContext*>(DC),
SourceLocation(),
Name.getAsIdentifierInfo(),
QualType::getFromOpaquePtr(type),
NULL,
SC_Static,
SC_Static,
false,
true);
// We have to do more than just synthesize the FunctionDecl. We have to
// synthesize ParmVarDecls for all of the FunctionDecl's arguments. To do
// this, we raid the function's FunctionProtoType for types.
QualType QT = QualType::getFromOpaquePtr(type);
clang::Type *T = QT.getTypePtr();
const FunctionProtoType *FPT = T->getAs<FunctionProtoType>();
if (FPT)
{
unsigned NumArgs = FPT->getNumArgs();
unsigned ArgIndex;
ParmVarDecl **ParmVarDecls = new ParmVarDecl*[NumArgs];
for (ArgIndex = 0; ArgIndex < NumArgs; ++ArgIndex)
{
QualType ArgQT = FPT->getArgType(ArgIndex);
ParmVarDecls[ArgIndex] = ParmVarDecl::Create(ASTSource.Context,
const_cast<DeclContext*>(DC),
SourceLocation(),
NULL,
ArgQT,
NULL,
SC_Static,
SC_Static,
NULL);
}
Decl->setParams(ParmVarDecls, NumArgs);
delete [] ParmVarDecls;
}
Decls.push_back(Decl);
return Decl;
}
clang::NamedDecl *NameSearchContext::AddGenericFunDecl()
{
QualType generic_function_type(ASTSource.Context.getFunctionType(ASTSource.Context.getSizeType(), // result
NULL, // argument types
0, // number of arguments
true, // variadic?
0, // type qualifiers
false, // has exception specification?
false, // has any exception specification?
0, // number of exceptions
NULL, // exceptions
FunctionType::ExtInfo())); // defaults for noreturn, regparm, calling convention
return AddFunDecl(generic_function_type.getAsOpaquePtr());
}
clang::NamedDecl *NameSearchContext::AddTypeDecl(void *type)
{
QualType QT = QualType::getFromOpaquePtr(type);
clang::Type *T = QT.getTypePtr();
if (TagType *tag_type = dyn_cast<clang::TagType>(T))
{
TagDecl *tag_decl = tag_type->getDecl();
Decls.push_back(tag_decl);
return tag_decl;
}
else
{
return NULL;
}
}
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