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//===-- ClangModulesDeclVendor.h --------------------------------*- 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
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_ClangModulesDeclVendor_h
#define liblldb_ClangModulesDeclVendor_h
#include "lldb/Core/ClangForward.h"
#include "lldb/Symbol/DeclVendor.h"
#include "lldb/Target/Platform.h"
#include <set>
#include <vector>
namespace lldb_private {
class ClangModulesDeclVendor : public DeclVendor {
public:
//------------------------------------------------------------------
// Constructors and Destructors
//------------------------------------------------------------------
ClangModulesDeclVendor();
~ClangModulesDeclVendor() override;
static ClangModulesDeclVendor *Create(Target &target);
typedef std::vector<ConstString> ModulePath;
typedef uintptr_t ModuleID;
typedef std::vector<ModuleID> ModuleVector;
//------------------------------------------------------------------
/// Add a module to the list of modules to search.
///
/// @param[in] path
/// The path to the exact module to be loaded. E.g., if the desired
/// module is std.io, then this should be { "std", "io" }.
///
/// @param[in] exported_modules
/// If non-NULL, a pointer to a vector to populate with the ID of every
/// module that is re-exported by the specified module.
///
/// @param[in] error_stream
/// A stream to populate with the output of the Clang parser when
/// it tries to load the module.
///
/// @return
/// True if the module could be loaded; false if not. If the
/// compiler encountered a fatal error during a previous module
/// load, then this will always return false for this ModuleImporter.
//------------------------------------------------------------------
virtual bool AddModule(ModulePath &path, ModuleVector *exported_modules,
Stream &error_stream) = 0;
//------------------------------------------------------------------
/// Add all modules referred to in a given compilation unit to the list
/// of modules to search.
///
/// @param[in] cu
/// The compilation unit to scan for imported modules.
///
/// @param[in] exported_modules
/// A vector to populate with the ID of each module loaded (directly
/// and via re-exports) in this way.
///
/// @param[in] error_stream
/// A stream to populate with the output of the Clang parser when
/// it tries to load the modules.
///
/// @return
/// True if all modules referred to by the compilation unit could be
/// loaded; false if one could not be loaded. If the compiler
/// encountered a fatal error during a previous module
/// load, then this will always return false for this ModuleImporter.
//------------------------------------------------------------------
virtual bool AddModulesForCompileUnit(CompileUnit &cu,
ModuleVector &exported_modules,
Stream &error_stream) = 0;
//------------------------------------------------------------------
/// Enumerate all the macros that are defined by a given set of modules
/// that are already imported.
///
/// @param[in] modules
/// The unique IDs for all modules to query. Later modules have higher
/// priority, just as if you @imported them in that order. This matters
/// if module A #defines a macro and module B #undefs it.
///
/// @param[in] handler
/// A function to call with the text of each #define (including the
/// #define directive). #undef directives are not included; we simply
/// elide any corresponding #define. If this function returns true,
/// we stop the iteration immediately.
//------------------------------------------------------------------
virtual void
ForEachMacro(const ModuleVector &modules,
std::function<bool(const std::string &)> handler) = 0;
//------------------------------------------------------------------
/// Query whether Clang supports modules for a particular language.
/// LLDB uses this to decide whether to try to find the modules loaded
/// by a gaiven compile unit.
///
/// @param[in] language
/// The language to query for.
///
/// @return
/// True if Clang has modules for the given language.
//------------------------------------------------------------------
static bool LanguageSupportsClangModules(lldb::LanguageType language);
};
} // namespace lldb_private
#endif // liblldb_ClangModulesDeclVendor_h
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