Unknown HLSL function attributes are reported as empty string ''

[onitake]

When compiling HLSL shaders to Vulkan SPIR-V, unknown or unsupported attributes are reported as the empty string (''). This makes it harder to find the source of the problem.

Example:

[earlydepthstencil]
float main() : SV_Target {
    return 1.0;
}

Compiled with:

glslangValidator -V test.frag.hlsl -e main -o test.spv

Output:

test.frag.hlsl
WARNING: test.frag.hlsl:3: '' : attribute does not apply to entry point 

The unsupported attribute here is [earlydepthstencil] - it would be helpful if this was printed.

[johnkslang]

The text has long been forgotten at that point.

There should be some bidirectional map connecting these, used both at parse time and warning time. That would clean up the long if-then-else chain and enable your request.