/src/assimp/code/Common/Maybe.h
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1 | | /* |
2 | | Open Asset Import Library (assimp) |
3 | | ---------------------------------------------------------------------- |
4 | | |
5 | | Copyright (c) 2006-2026, assimp team |
6 | | |
7 | | All rights reserved. |
8 | | |
9 | | Redistribution and use of this software in source and binary forms, |
10 | | with or without modification, are permitted provided that the |
11 | | following conditions are met: |
12 | | |
13 | | * Redistributions of source code must retain the above |
14 | | copyright notice, this list of conditions and the |
15 | | following disclaimer. |
16 | | |
17 | | * Redistributions in binary form must reproduce the above |
18 | | copyright notice, this list of conditions and the |
19 | | following disclaimer in the documentation and/or other |
20 | | materials provided with the distribution. |
21 | | |
22 | | * Neither the name of the assimp team, nor the names of its |
23 | | contributors may be used to endorse or promote products |
24 | | derived from this software without specific prior |
25 | | written permission of the assimp team. |
26 | | |
27 | | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
28 | | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
29 | | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
30 | | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
31 | | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
32 | | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
33 | | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
34 | | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
35 | | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
36 | | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
37 | | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
38 | | |
39 | | ---------------------------------------------------------------------- |
40 | | */ |
41 | | #pragma once |
42 | | |
43 | | #include <assimp/ai_assert.h> |
44 | | #include <utility> |
45 | | |
46 | | namespace Assimp { |
47 | | |
48 | | /// @brief This class implements an optional type |
49 | | /// @tparam T The type to store. |
50 | | template <typename T> |
51 | | struct Maybe { |
52 | | /// @brief |
53 | 840k | Maybe() = default; Assimp::Maybe<float>::Maybe() Line | Count | Source | 53 | 781k | Maybe() = default; |
Assimp::Maybe<aiColor3D>::Maybe() Line | Count | Source | 53 | 59.1k | Maybe() = default; |
|
54 | | |
55 | | /// @brief |
56 | | /// @param val |
57 | | template <typename U> |
58 | | explicit Maybe(U &&val) : |
59 | 65.0k | _val(std::forward<U>(val)), _valid(true) {} |
60 | | |
61 | | /// @brief Validate the value |
62 | | /// @return true if valid. |
63 | 181k | operator bool() const { |
64 | 181k | return _valid; |
65 | 181k | } Assimp::Maybe<float>::operator bool() const Line | Count | Source | 63 | 145k | operator bool() const { | 64 | 145k | return _valid; | 65 | 145k | } |
Assimp::Maybe<aiColor3D>::operator bool() const Line | Count | Source | 63 | 36.2k | operator bool() const { | 64 | 36.2k | return _valid; | 65 | 36.2k | } |
|
66 | | |
67 | | /// @brief Will assign a value. |
68 | | /// @param v The new valid value. |
69 | | template <typename U> |
70 | | void Set(U &&v) { |
71 | | ai_assert(!_valid); |
72 | | |
73 | | _valid = true; |
74 | | _val = std::forward<U>(v); |
75 | | } |
76 | | |
77 | | /// @brief Will return the value when it is valid. |
78 | | /// @return The value. |
79 | 1.17k | const T &Get() const { |
80 | 1.17k | ai_assert(_valid); |
81 | 1.17k | return _val; |
82 | 1.17k | } Assimp::Maybe<float>::Get() const Line | Count | Source | 79 | 519 | const T &Get() const { | 80 | 519 | ai_assert(_valid); | 81 | 519 | return _val; | 82 | 519 | } |
Assimp::Maybe<aiColor3D>::Get() const Line | Count | Source | 79 | 660 | const T &Get() const { | 80 | 660 | ai_assert(_valid); | 81 | 660 | return _val; | 82 | 660 | } |
|
83 | | |
84 | | Maybe &operator&() = delete; |
85 | | Maybe(const Maybe &) = delete; |
86 | | Maybe &operator=(const Maybe &) = default; |
87 | | |
88 | | private: |
89 | | T _val; |
90 | | bool _valid = false; |
91 | | }; |
92 | | |
93 | | } // namespace Assimp |