David Neto comments

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                                            David Neto

Difference between alignment of struct with size 8 vs `vec2<f32>` in uniform buffers.

The rule requiring a *struct* to be aligned to 16bytes in a uniform buffer trace back to the OpenGL std140 rules, and the Vulkan layout rules for uniform buffers (assuming...

Difference between alignment of struct with size 8 vs `vec2<f32>` in uniform buffers.

There is a Vulkan extension, [VK_KHR_uniform_buffer_standard_layout](https://docs.vulkan.org/guide/latest/shader_memory_layout.html#VK_KHR_uniform_buffer_standard_layout) which relaxes the rules and allows uniform buffers to use the same rules as storage buffers. That extension was promoted to core in Vulkan...

Use enum tokens when they are the only possible grammar usage.

My personal views: - The most important thing is that WGSL is well specified - It's also important that the WGSL spec is clear to human readers. - Baking rules...

Use enum tokens when they are the only possible grammar usage.

More of my personal views: - I care more about the usability of WGSL than how much work it takes to update downstream tools. Thinking out loud (not a proposal)....

How to write NaN in a shader?

The relevant Vulkan feature bit is shaderSignedZeroInfNanPreserveFloat32 which was introduced by VK_KHR_shader_float_controls It's not universally supported. You can explore at https://vulkan.gpuinfo.org/listpropertiesextensions.php

How to write NaN in a shader?

> Can you use a different sentinel value? Using something in the finite range of f32 is the portable way to do it. The spec now has tables of extreme...

How to write NaN in a shader?

Ah, reopening as this is a documentation / developer advice issue.

add a system-defined wsgl namespace for predeclared objects

Note: Currently `wgsl` is a reserved word, so this is backward compatible.

Clarify typography of abstract int 0 and abstract float 0

Close in favour of the broader work of #4451

Support arrayLength for fixed-size arrays

A year ago I was in a minimalist mood. Now it's supported by the additional feedback. This was briefly discussed in today's WGSL meeting. [notes](https://docs.google.com/document/d/1w8vmiIJ9QOpPT2Kf58BQ93HHGfH44TszPLA6XbrcQ50/edit). It was supported in general....