| 1 | /* Utilities for querying and manipulating type trees. |
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| 2 | Copyright (C) 2013-2023 Free Software Foundation, Inc. |
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| 3 | |
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| 4 | This file is part of GCC. |
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| 5 | |
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| 6 | GCC is free software; you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation; either version 3, or (at your option) |
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| 9 | any later version. |
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| 10 | |
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| 11 | GCC is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | GNU General Public License for more details. |
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| 15 | |
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| 16 | You should have received a copy of the GNU General Public License |
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| 17 | along with GCC; see the file COPYING3. If not see |
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| 18 | <http://www.gnu.org/licenses/>. */ |
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| 19 | |
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| 20 | #ifndef GCC_CP_TYPE_UTILS_H |
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| 21 | #define GCC_CP_TYPE_UTILS_H |
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| 22 | |
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| 23 | /* Returns the first tree within T that is directly matched by PRED. T may be a |
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| 24 | type or PARM_DECL and is incrementally decomposed toward its type-specifier |
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| 25 | until a match is found. NULL is returned if PRED does not match any |
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| 26 | part of T. |
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| 27 | |
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| 28 | This is primarily intended for detecting whether T uses `auto' or a concept |
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| 29 | identifier. Since either of these can only appear as a type-specifier for |
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| 30 | the declaration in question, only top-level qualifications are traversed; |
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| 31 | find_type_usage does not look through the whole type. */ |
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| 32 | |
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| 33 | inline tree |
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| 34 | find_type_usage (tree t, bool (*pred) (const_tree)) |
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| 35 | { |
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| 36 | if (pred (t)) |
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| 37 | return t; |
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| 38 | |
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| 39 | enum tree_code code = TREE_CODE (t); |
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| 40 | |
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| 41 | if (code == POINTER_TYPE || code == REFERENCE_TYPE |
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| 42 | || code == PARM_DECL || code == OFFSET_TYPE |
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| 43 | || code == FUNCTION_TYPE || code == METHOD_TYPE |
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| 44 | || code == ARRAY_TYPE) |
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| 45 | return find_type_usage (TREE_TYPE (t), pred); |
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| 46 | |
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| 47 | if (TYPE_PTRMEMFUNC_P (t)) |
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| 48 | return find_type_usage |
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| 49 | (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (t)), pred); |
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| 50 | |
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| 51 | return NULL_TREE; |
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| 52 | } |
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| 53 | |
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| 54 | #endif // GCC_CP_TYPE_UTILS_H |
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| 55 | |
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