1 /**************************************************************************
3 * Copyright 2011 Jose Fonseca
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 **************************************************************************/
37 * It is just like a regular std::map<T, T> container, but lookups of missing
38 * keys return the key instead of default constructor.
40 * This is necessary for several GL named objects, where one can either request
41 * the implementation to generate an unique name, or pick a value never used
44 * XXX: In some cases, instead of returning the key, it would make more sense
45 * to return an unused data value (e.g., container count).
51 typedef std::map<T, T> base_type;
56 T & operator[] (const T &key) {
57 typename base_type::iterator it;
59 if (it == base.end()) {
60 return (base[key] = key);
65 const T & operator[] (const T &key) const {
66 typename base_type::const_iterator it;
68 if (it == base.end()) {
69 return (base[key] = key);
76 } /* namespace retrace */
78 #endif /* _RETRACE_HPP_ */