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46b2b0ac | 1 | /* Utilities for querying and manipulating type trees. |
f1717362 | 2 | Copyright (C) 2013-2016 Free Software Foundation, Inc. |
46b2b0ac | 3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC 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, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GCC 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 GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #ifndef GCC_CP_TYPE_UTILS_H | |
21 | #define GCC_CP_TYPE_UTILS_H | |
22 | ||
23 | /* Returns the first tree within T that is directly matched by PRED. T may be a | |
24 | type or PARM_DECL and is incrementally decomposed toward its type-specifier | |
25 | until a match is found. NULL_TREE is returned if PRED does not match any | |
26 | part of T. | |
27 | ||
28 | This is primarily intended for detecting whether T uses `auto' or a concept | |
29 | identifier. Since either of these can only appear as a type-specifier for | |
30 | the declaration in question, only top-level qualifications are traversed; | |
31 | find_type_usage does not look through the whole type. */ | |
32 | ||
33 | inline tree | |
34 | find_type_usage (tree t, bool (*pred) (const_tree)) | |
35 | { | |
36 | enum tree_code code; | |
37 | if (pred (t)) | |
38 | return t; | |
39 | ||
40 | code = TREE_CODE (t); | |
41 | ||
42 | if (code == POINTER_TYPE || code == REFERENCE_TYPE | |
43 | || code == PARM_DECL || code == OFFSET_TYPE | |
44 | || code == FUNCTION_TYPE || code == METHOD_TYPE | |
45 | || code == ARRAY_TYPE) | |
46 | return find_type_usage (TREE_TYPE (t), pred); | |
47 | ||
48 | if (TYPE_PTRMEMFUNC_P (t)) | |
49 | return find_type_usage | |
bd0e09fe | 50 | (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (t)), pred); |
46b2b0ac | 51 | |
52 | return NULL_TREE; | |
53 | } | |
54 | ||
55 | #endif // GCC_CP_TYPE_UTILS_H |