ClangPersistentVariables.h revision 8f2e392e8937aaf66f91201dc5f4190d61902c67 
1//===-- ClangPersistentVariables.h ------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef liblldb_ClangPersistentVariables_h_
11#define liblldb_ClangPersistentVariables_h_
12
13#include "lldb/Expression/ClangExpressionVariable.h"
14#include "llvm/ADT/DenseMap.h"
15
16namespace lldb_private
17{
18
19//----------------------------------------------------------------------
20/// @class ClangPersistentVariables ClangPersistentVariables.h "lldb/Expression/ClangPersistentVariables.h"
21/// @brief Manages persistent values that need to be preserved between expression invocations.
22///
23/// A list of variables that can be accessed and updated by any expression.  See
24/// ClangPersistentVariable for more discussion.  Also provides an increasing,
25/// 0-based counter for naming result variables.
26//----------------------------------------------------------------------
27class ClangPersistentVariables : public ClangExpressionVariableList
28{
29public:
30
31    //----------------------------------------------------------------------
32    /// Constructor
33    //----------------------------------------------------------------------
34    ClangPersistentVariables ();
35
36    lldb::ClangExpressionVariableSP
37    CreatePersistentVariable (const lldb::ValueObjectSP &valobj_sp);
38
39    lldb::ClangExpressionVariableSP
40    CreatePersistentVariable (ExecutionContextScope *exe_scope,
41                              const ConstString &name,
42                              const TypeFromUser& user_type,
43                              lldb::ByteOrder byte_order,
44                              uint32_t addr_byte_size);
45
46    //----------------------------------------------------------------------
47    /// Return the next entry in the sequence of strings "$0", "$1", ... for
48    /// use naming persistent expression convenience variables.
49    ///
50    /// @return
51    ///     A string that contains the next persistent variable name.
52    //----------------------------------------------------------------------
53    ConstString
54    GetNextPersistentVariableName ();
55
56    void
57    RemovePersistentVariable (lldb::ClangExpressionVariableSP variable);
58
59    void
60    RegisterPersistentType (const ConstString &name,
61                            clang::TypeDecl *tag_decl);
62
63    clang::TypeDecl *
64    GetPersistentType (const ConstString &name);
65
66private:
67    uint32_t                                                m_next_persistent_variable_id;  ///< The counter used by GetNextResultName().
68
69    typedef llvm::DenseMap<const char *, clang::TypeDecl *> PersistentTypeMap;
70    PersistentTypeMap                                       m_persistent_types;             ///< The persistent types declared by the user.
71};
72
73}
74
75#endif
76