/* Utilities for querying and manipulating type trees.
|
Copyright (C) 2013-2017 Free Software Foundation, Inc.
|
|
This file is part of GCC.
|
|
GCC is free software; you can redistribute it and/or modify
|
it under the terms of the GNU General Public License as published by
|
the Free Software Foundation; either version 3, or (at your option)
|
any later version.
|
|
GCC is distributed in the hope that it will be useful,
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
GNU General Public License for more details.
|
|
You should have received a copy of the GNU General Public License
|
along with GCC; see the file COPYING3. If not see
|
<http://www.gnu.org/licenses/>. */
|
|
#ifndef GCC_CP_TYPE_UTILS_H
|
#define GCC_CP_TYPE_UTILS_H
|
|
/* Returns the first tree within T that is directly matched by PRED. T may be a
|
type or PARM_DECL and is incrementally decomposed toward its type-specifier
|
until a match is found. NULL_TREE is returned if PRED does not match any
|
part of T.
|
|
This is primarily intended for detecting whether T uses `auto' or a concept
|
identifier. Since either of these can only appear as a type-specifier for
|
the declaration in question, only top-level qualifications are traversed;
|
find_type_usage does not look through the whole type. */
|
|
inline tree
|
find_type_usage (tree t, bool (*pred) (const_tree))
|
{
|
enum tree_code code;
|
if (pred (t))
|
return t;
|
|
code = TREE_CODE (t);
|
|
if (code == POINTER_TYPE || code == REFERENCE_TYPE
|
|| code == PARM_DECL || code == OFFSET_TYPE
|
|| code == FUNCTION_TYPE || code == METHOD_TYPE
|
|| code == ARRAY_TYPE)
|
return find_type_usage (TREE_TYPE (t), pred);
|
|
if (TYPE_PTRMEMFUNC_P (t))
|
return find_type_usage
|
(TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (t)), pred);
|
|
return NULL_TREE;
|
}
|
|
#endif // GCC_CP_TYPE_UTILS_H
|
