| 1 | /* Code dealing with "using" directives for GDB. |
| 2 | Copyright (C) 2003-2019 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 "gdbsupport/vec.h" |
| 23 | #include "gdbsupport/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 | const std::vector<const char *> &excludes, |
| 115 | int copy_names, |
| 116 | struct obstack *obstack); |
| 117 | |
| 118 | #endif /* NAMESPACE_H */ |