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//===-- SwiftPersistentExpressionState.h ------------------------*- C++ -*-===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_SwiftPersistentExpressionState_h_
#define liblldb_SwiftPersistentExpressionState_h_
#include "SwiftExpressionVariable.h"
#include "lldb/Expression/ExpressionVariable.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include <string>
namespace lldb_private {
/// Manages persistent values that need to be preserved between
/// expression invocations.
///
/// A list of variables that can be accessed and updated by any
/// expression. See \ref ClangPersistentVariable for more discussion.
/// Also provides an increasing, 0-based counter for naming result
/// variables.
class SwiftPersistentExpressionState : public PersistentExpressionState {
public:
class SwiftDeclMap {
public:
void AddDecl(CompilerDecl value_decl, bool check_existing,
llvm::StringRef name);
/// Find decls matching `name`, excluding decls that are equivalent to
/// decls in `excluding_equivalents`, and put the results in `matches`.
/// Return true if there are any results.
bool FindMatchingDecls(
llvm::StringRef name,
const std::vector<CompilerDecl> &excluding_equivalents,
std::vector<CompilerDecl> &matches);
void CopyDeclsTo(SwiftDeclMap &target_map);
static bool DeclsAreEquivalent(CompilerDecl lhs, CompilerDecl rhs);
private:
/// Each decl also stores the context it comes from.
llvm::StringMap<llvm::SmallVector<CompilerDecl, 1>> m_swift_decls;
};
//----------------------------------------------------------------------
/// Constructor
//----------------------------------------------------------------------
SwiftPersistentExpressionState();
~SwiftPersistentExpressionState() {}
//------------------------------------------------------------------
// llvm casting support
//------------------------------------------------------------------
// LLVM RTTI Support
static char ID;
lldb::ExpressionVariableSP
CreatePersistentVariable(const lldb::ValueObjectSP &valobj_sp) override;
lldb::ExpressionVariableSP
CreatePersistentVariable(ExecutionContextScope *exe_scope, ConstString name,
const CompilerType &compiler_type,
lldb::ByteOrder byte_order,
uint32_t addr_byte_size) override;
llvm::StringRef GetPersistentVariablePrefix(bool is_error) const override {
return is_error ? "$E" : "$R";
}
void RemovePersistentVariable(lldb::ExpressionVariableSP variable) override;
ConstString GetNextPersistentVariableName(bool is_error = false) override;
std::optional<CompilerType>
GetCompilerTypeFromPersistentDecl(ConstString type_name) override;
void RegisterSwiftPersistentDecl(CompilerDecl value_decl);
void RegisterSwiftPersistentDeclAlias(CompilerDecl value_decl,
llvm::StringRef name);
void CopyInSwiftPersistentDecls(SwiftDeclMap &source_map);
/// Find decls matching `name`, excluding decls that are equivalent to decls
/// in `excluding_equivalents`, and put the results in `matches`. Return true
/// if there are any results.
bool GetSwiftPersistentDecls(
llvm::StringRef name,
const std::vector<CompilerDecl> &excluding_equivalents,
std::vector<CompilerDecl> &matches);
private:
/// The counter used by GetNextResultName().
uint32_t m_next_persistent_variable_id;
/// The counter used by GetNextResultName() when is_error is true.
uint32_t m_next_persistent_error_id;
/// The persistent functions declared by the user.
SwiftDeclMap m_swift_persistent_decls;
};
} // namespace lldb_private
#endif
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