clang-format breaks hlsl syntax for infinity (+1.#INF)

[clshortfuse]

When using clang format on

float x = y * +1.#INF;

clang-format will separate it to

float x = y * +1. #INF;

This is invalid HLSL code and won't allow it to be compiled.

[llvmbot]

@llvm/issue-subscribers-clang-format

Author: Carlos Lopez (clshortfuse)

When using clang format on ```cpp float x = y * +1.#INF; ```

clang-format will separate it to

float x = y * +1. #INF;

This is invalid HLSL code and won't allow it to be compiled.

[clshortfuse]

Couldn't find an official spec for the constant, but did a find reference in this proposal:

The HLSL Infinity constant syntax violates C token rules by using the # character, and is not consistent with C or C++ language styling. This causes technical challenges by using reserved preprocessor tokens, but also makes the feature foreign and less approachable in a C-like language.

https://microsoft.github.io/hlsl-specs/proposals/0003-numeric-constants.html

Not sure if there are others from testing on https://shader-playground.timjones.io/

[clshortfuse]

@llvm-beanz Hi, are you aware of any other C syntax violating constants in HLSL other than 1.#INF?