[PATCH v4 0/5] MR70: vkd3d-shader/hlsl: Make single-component swizzles retrieve a scalar and add more swizzle tests.

[Francisco Casas (＠fcasas)]

Vectors cannot be used as array indexes, however, single-component
swizzles (such as vec.x) can be used.

This suggests that single-component swizzles should actually be
scalars and not vectors of dimx = 1.

It is worth noting that the use of swizzles on scalars should still
be allowed.

--
  v4: vkd3d-shader/hlsl: Make single-component swizzles retrieve a scalar.
      tests: Add tests for assignments to self with swizzles.
      tests: Test swizzles on scalar values.
      tests: Test using single-component swizzles as indexes.
      tests: Combine all the swizzle tests in a single file.

https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/70