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Moved to gfx-rs/wgpu#4297
We can have printf in shaders :)
Supports wgsl-in, spv-in, spv-out, hlsl-out, glsl-out
Supporting glsl-in would need changes upstream in https://github.com/Kangz/glslpp-rs/ to parse the format strings.
msl has no support for this sort of feature as far as I can tell.
for more info see: https://github.com/KhronosGroup/Vulkan-ValidationLayers/blob/main/docs/debug_printf.md
cc: gfx-rs/wgpu#4410