Torstein Grindvik 12f30f5667 Shaders can now have #else ifdef chains (#7431) ... # Objective Currently, shaders may only have syntax such as ```wgsl #ifdef FOO // foo code #else #ifdef BAR // bar code #else #ifdef BAZ // baz code #else // fallback code #endif #endif #endif ``` This is hard to read and follow. Add a way to allow writing `#else ifdef DEFINE` to reduce the number of scopes introduced and to increase readability. ## Solution Refactor the current preprocessing a bit and add logic to allow `#else ifdef DEFINE`. This includes per-scope tracking of whether a branch has been accepted. Add a few tests for this feature. With these changes we may now write: ```wgsl #ifdef FOO // foo code #else ifdef BAR // bar code #else ifdef BAZ // baz code #else // fallback code #endif ``` instead. --- ## Changelog - Add `#else ifdef` to shader preprocessing.		2023-02-04 15:29:35 +00:00
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macros	Extract component derive (#7399)	2023-01-30 18:12:16 +00:00
src	Shaders can now have #else ifdef chains (#7431)	2023-02-04 15:29:35 +00:00
Cargo.toml	Wgpu 0.15 (#7356)	2023-01-29 20:27:30 +00:00