1 /* Code dealing with "using" directives for GDB. 2 Copyright (C) 2003-2016 Free Software Foundation, Inc. 3 4 This file is part of GDB. 5 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. 10 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. 15 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/>. */ 18 19 #ifndef NAMESPACE_H 20 #define NAMESPACE_H 21 22 #include "vec.h" 23 #include "gdb_vecs.h" 24 #include "gdb_obstack.h" 25 26 /* This struct is designed to store data from using directives. It 27 says that names from namespace IMPORT_SRC should be visible within 28 namespace IMPORT_DEST. These form a linked list; NEXT is the next 29 element of the list. If the imported namespace or declaration has 30 been aliased within the IMPORT_DEST namespace, ALIAS is set to a 31 string representing the alias. Otherwise, ALIAS is NULL. 32 DECLARATION is the name of the imported declaration, if this import 33 statement represents one. Otherwise DECLARATION is NULL and this 34 import statement represents a namespace. 35 36 C++: using namespace A; 37 Fortran: use A 38 import_src = "A" 39 import_dest = local scope of the import statement even such as "" 40 alias = NULL 41 declaration = NULL 42 excludes = NULL 43 44 C++: using A::x; 45 Fortran: use A, only: x 46 import_src = "A" 47 import_dest = local scope of the import statement even such as "" 48 alias = NULL 49 declaration = "x" 50 excludes = NULL 51 The declaration will get imported as import_dest::x. 52 53 C++ has no way to import all names except those listed ones. 54 Fortran: use A, localname => x 55 import_src = "A" 56 import_dest = local scope of the import statement even such as "" 57 alias = "localname" 58 declaration = "x" 59 excludes = NULL 60 + 61 import_src = "A" 62 import_dest = local scope of the import statement even such as "" 63 alias = NULL 64 declaration = NULL 65 excludes = ["x"] 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. 68 69 C++: namespace LOCALNS = A; 70 Fortran has no way to address non-local namespace/module. 71 import_src = "A" 72 import_dest = local scope of the import statement even such as "" 73 alias = "LOCALNS" 74 declaration = NULL 75 excludes = NULL 76 The namespace will get imported as the import_dest::LOCALNS 77 namespace. 78 79 C++ cannot express it, it would be something like: using localname 80 = A::x; 81 Fortran: use A, only localname => x 82 import_src = "A" 83 import_dest = local scope of the import statement even such as "" 84 alias = "localname" 85 declaration = "x" 86 excludes = NULL 87 The declaration will get imported as localname or 88 `import_dest`localname. */ 89 90 struct using_direct 91 { 92 const char *import_src; 93 const char *import_dest; 94 95 const char *alias; 96 const char *declaration; 97 98 struct using_direct *next; 99 100 /* Used during import search to temporarily mark this node as 101 searched. */ 102 int searched; 103 104 /* USING_DIRECT has variable allocation size according to the number of 105 EXCLUDES entries, the last entry is NULL. */ 106 const char *excludes[1]; 107 }; 108 109 extern void add_using_directive (struct using_direct **using_directives, 110 const char *dest, 111 const char *src, 112 const char *alias, 113 const char *declaration, 114 VEC (const_char_ptr) *excludes, 115 int copy_names, 116 struct obstack *obstack); 117 118 #endif /* NAMESPACE_H */ 119