//===-- ClangUtil.cpp -------------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
// A collection of helper methods and data structures for manipulating clang
// types and decls.
//===----------------------------------------------------------------------===//

#include "lldb/Symbol/ClangUtil.h"
#include "lldb/Symbol/ClangASTContext.h"

using namespace clang;
using namespace lldb_private;

bool
ClangUtil::IsClangType(const CompilerType &ct)
{
    if (llvm::dyn_cast_or_null<ClangASTContext>(ct.GetTypeSystem()) == nullptr)
        return false;

    if (!ct.GetOpaqueQualType())
        return false;

    return true;
}

QualType
ClangUtil::GetQualType(const CompilerType &ct)
{
    // Make sure we have a clang type before making a clang::QualType
    if (!IsClangType(ct))
        return QualType();

    return QualType::getFromOpaquePtr(ct.GetOpaqueQualType());
}

QualType
ClangUtil::GetCanonicalQualType(const CompilerType &ct)
{
    if (!IsClangType(ct))
        return QualType();

    return GetQualType(ct).getCanonicalType();
}

CompilerType
ClangUtil::RemoveFastQualifiers(const CompilerType &ct)
{
    if (!IsClangType(ct))
        return ct;

    QualType qual_type(GetQualType(ct));
    qual_type.removeLocalFastQualifiers();
    return CompilerType(ct.GetTypeSystem(), qual_type.getAsOpaquePtr());
}