| // Copyright 2026 The Dawn & Tint Authors | |
| // | |
| // Redistribution and use in source and binary forms, with or without | |
| // modification, are permitted provided that the following conditions are met: | |
| // | |
| // 1. Redistributions of source code must retain the above copyright notice, this | |
| // list of conditions and the following disclaimer. | |
| // | |
| // 2. Redistributions in binary form must reproduce the above copyright notice, | |
| // this list of conditions and the following disclaimer in the documentation | |
| // and/or other materials provided with the distribution. | |
| // | |
| // 3. Neither the name of the copyright holder nor the names of its | |
| // contributors may be used to endorse or promote products derived from | |
| // this software without specific prior written permission. | |
| // | |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | |
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| // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| #ifndef SRC_DAWN_COMMON_STRINGS_H_ | |
| #define SRC_DAWN_COMMON_STRINGS_H_ | |
| // Macro for multiline strings with "C-like" contents such as WGSL/MSL code. | |
| // | |
| // - Omits comments because they are removed before macro expansion. | |
| // (WGSL conveniently has similar comment syntax to C.) | |
| // - Collapses sequences of whitespace into a single space. | |
| // - Removes leading and trailing whitespace. | |
| // | |
| // **Important notes:** | |
| // - Contents MUST have balanced parentheses so that the macro invocation can be | |
| // parsed in the first place. | |
| // - Does NOT work on strings containing things that look like C preprocessor | |
| // directives (like MSL) because those get parsed before macro expansion. | |
| // - Contents SHOULD have balanced braces, otherwise this causes issues with | |
| // clang-format indentation of following lines. | |
| // - There are other bugs in clang-format relating to WhitespaceSensitiveMacros | |
| // and sometimes it will try to reformat the contents. Sometimes, blank | |
| // comments can be used to avoid bad formatting. Hopefully reformatting | |
| // shouldn't affect the semantics of any code. | |
| // - Due to some bugs in clang-format, possibly relating to partially-formatting | |
| // files, these strings sometimes get inappropriately formatted, but hopefully | |
| // their actual contents shouldn't change. Sometimes blank comments can be | |
| // used to avoid bad formatting. | |
| #define DAWN_MULTILINE(...) #__VA_ARGS__ | |
| #endif // SRC_DAWN_COMMON_STRINGS_H_ |