53aedd4d1c97e68eb35a118f15f825585f1f5cad
1 /* Code dealing with "using" directives for GDB.
2 Copyright (C) 2003-2023 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "gdbsupport/gdb_vecs.h"
23 #include "gdbsupport/gdb_obstack.h"
25 /* This struct is designed to store data from using directives. It
26 says that names from namespace IMPORT_SRC should be visible within
27 namespace IMPORT_DEST. These form a linked list; NEXT is the next
28 element of the list. If the imported namespace or declaration has
29 been aliased within the IMPORT_DEST namespace, ALIAS is set to a
30 string representing the alias. Otherwise, ALIAS is NULL.
31 DECLARATION is the name of the imported declaration, if this import
32 statement represents one. Otherwise DECLARATION is NULL and this
33 import statement represents a namespace. DECL_LINE is the line
34 where the using directive is written in the source code.
36 C++: using namespace A;
39 import_dest = local scope of the import statement even such as ""
45 Fortran: use A, only: x
47 import_dest = local scope of the import statement even such as ""
51 The declaration will get imported as import_dest::x.
53 C++ has no way to import all names except those listed ones.
54 Fortran: use A, localname => x
56 import_dest = local scope of the import statement even such as ""
62 import_dest = local scope of the import statement even such as ""
66 All the entries of A get imported except of "x". "x" gets imported as
67 "localname". "x" is not defined as a local name by this statement.
69 C++: namespace LOCALNS = A;
70 Fortran has no way to address non-local namespace/module.
72 import_dest = local scope of the import statement even such as ""
76 The namespace will get imported as the import_dest::LOCALNS
79 C++ cannot express it, it would be something like: using localname
81 Fortran: use A, only localname => x
83 import_dest = local scope of the import statement even such as ""
87 The declaration will get imported as localname or
88 `import_dest`localname. */
92 const char *import_src
;
93 const char *import_dest
;
96 const char *declaration
;
98 struct using_direct
*next
;
100 /* The line where the using directive was declared on the source file.
101 This is used to check if the using directive is already active at the
102 point where the inferior is stopped. */
103 unsigned int decl_line
;
105 /* Used during import search to temporarily mark this node as
109 /* USING_DIRECT has variable allocation size according to the number of
110 EXCLUDES entries, the last entry is NULL. */
111 const char *excludes
[1];
113 /* Returns true if the using_directive USING_DIR is valid in CURR_LINE.
114 Because current GCC (at least version 12.2) sets the decl_line as
115 the last line in the current block, we need to take this into
116 consideration when checking the validity, by comparing it to
117 BOUNDARY, the last line of the current block. */
118 bool valid_line (unsigned int boundary
) const;
121 extern void add_using_directive (struct using_direct
**using_directives
,
125 const char *declaration
,
126 const std::vector
<const char *> &excludes
,
127 const unsigned int decl_line
,
129 struct obstack
*obstack
);
131 #endif /* NAMESPACE_H */