Wesl macro #77
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Wesl macro #77
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For future reference: the spans of the macro ast nodes count the token indices, not the char indices. It can lead to confusion, but there is no easy way around this until proc_macro Spans get byte_range (rust#54725) (which might not happen any time soon) |
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closed #39
The macro allows writing wesl syntax inline in your rust code, which generates the corresponding AST constructor expression. It can interpolate local variables too, which allows code injection.
(this process is called quasiquoting afaict)
Previous art: the quote macro for Rust, yew's html macro, there's one for glsl too. With wgsl it's nice because it mirrors rust's syntax quite nicely.
With this feature I can embed snippets of wesl AST into the code. I was able to move the prelude wgsl file (used for evaluation and validation) to it and I intend to use it for generics. Could be useful for wesl users too, e.g. for generating virtual (runtime) modules.