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//===-- CompilerDeclContext.h -----------------------------------*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include <vector>
#include "lldb/Utility/ConstString.h"
#include "lldb/lldb-private.h"
namespace lldb_private {
/// Represents a generic declaration context in a program. A declaration context
/// is data structure that contains declarations (e.g. namespaces).
/// This class serves as an abstraction for a declaration context inside one of
/// the TypeSystems implemented by the language plugins. It does not have any
/// actual logic in it but only stores an opaque pointer and a pointer to the
/// TypeSystem that gives meaning to this opaque pointer. All methods of this
/// class should call their respective method in the TypeSystem interface and
/// pass the opaque pointer along.
/// \see lldb_private::TypeSystem
class CompilerDeclContext {
/// Constructs an invalid CompilerDeclContext.
CompilerDeclContext() = default;
/// Constructs a CompilerDeclContext with the given opaque decl context
/// and its respective TypeSystem instance.
/// This constructor should only be called from the respective TypeSystem
/// implementation.
/// \see lldb_private::TypeSystemClang::CreateDeclContext(clang::DeclContext*)
CompilerDeclContext(TypeSystem *type_system, void *decl_ctx)
: m_type_system(type_system), m_opaque_decl_ctx(decl_ctx) {}
// Tests
explicit operator bool() const { return IsValid(); }
bool operator<(const CompilerDeclContext &rhs) const {
if (m_type_system == rhs.m_type_system)
return m_opaque_decl_ctx < rhs.m_opaque_decl_ctx;
return m_type_system < rhs.m_type_system;
bool IsValid() const {
return m_type_system != nullptr && m_opaque_decl_ctx != nullptr;
std::vector<CompilerDecl> FindDeclByName(ConstString name,
const bool ignore_using_decls);
/// Checks if this decl context represents a method of a class.
/// \param[out] language_ptr
/// If non NULL and \b true is returned from this function,
/// this will indicate if the language that respresents the method.
/// \param[out] is_instance_method_ptr
/// If non NULL and \b true is returned from this function,
/// this will indicate if the method is an instance function (true)
/// or a class method (false indicating the function is static, or
/// doesn't require an instance of the class to be called).
/// \param[out] language_object_name_ptr
/// If non NULL and \b true is returned from this function,
/// this will indicate if implicit object name for the language
/// like "this" for C++, and "self" for Objective C.
/// \return
/// Returns true if this is a decl context that represents a method
/// in a struct, union or class.
bool IsClassMethod(lldb::LanguageType *language_ptr,
bool *is_instance_method_ptr,
ConstString *language_object_name_ptr);
/// Check if the given other decl context is contained in the lookup
/// of this decl context (for example because the other context is a nested
/// inline namespace).
/// @param[in] other
/// The other decl context for which we should check if it is contained
/// in the lookoup of this context.
/// @return
/// Returns true iff the other decl context is contained in the lookup
/// of this decl context.
bool IsContainedInLookup(CompilerDeclContext other) const;
// Accessors
TypeSystem *GetTypeSystem() const { return m_type_system; }
void *GetOpaqueDeclContext() const { return m_opaque_decl_ctx; }
void SetDeclContext(TypeSystem *type_system, void *decl_ctx) {
m_type_system = type_system;
m_opaque_decl_ctx = decl_ctx;
void Clear() {
m_type_system = nullptr;
m_opaque_decl_ctx = nullptr;
ConstString GetName() const;
ConstString GetScopeQualifiedName() const;
TypeSystem *m_type_system = nullptr;
void *m_opaque_decl_ctx = nullptr;
bool operator==(const CompilerDeclContext &lhs, const CompilerDeclContext &rhs);
bool operator!=(const CompilerDeclContext &lhs, const CompilerDeclContext &rhs);
} // namespace lldb_private