PI and TAU arent considered valid numeric expressions in hint_range in non-spatial shaders

Tested versions

Godot 4.6 stable

System information

Godot v4.6.stable - Windows 11 (build 26200) - Multi-window, 2 monitors - Direct3D 12 (Forward+) - dedicated NVIDIA GeForce RTX 2070 SUPER (NVIDIA; 32.0.15.9186) - Intel(R) Core(TM) i7-10700K CPU @ 3.80GHz (16 threads) - 63.74 GiB memory

Issue description

For some reason variables like PI and TAU aren't considered valid numeric expressions when used as values for hint range

//***- mutable error behavior with shader_type -***
//This line errors with "Expected a valid numeric expression after ','
//on shader types canvas item, fog, particles and sky, but NOT spatial
uniform float using_constant : hint_range(0.0,(2.0*PI)) = 0.0;
uniform float using_constant_tau : hint_range(0.0, TAU) = 0.0;

//this line works just fine on all shader types
uniform float not_using_constant : hint_range(0.0,2.0*1.0) = 0.0;
//and obviously this works fine on all shader types
uniform float simple : hint_range(0.0,1.0) = 0.0;

There is also a special case in the spatial shader

//the spatial shader type doesnt error when you use constants in the hint range directly like so:
uniform float using_constant : hint_range(0.0,(2.0*PI)) = 0.0;
//however if the constant is inside of another constant directly, it errors
const float CONSTANT_PI = PI;
uniform float using_custom_constant:hint_range(0.0, CONSTANT_PI);

//this is also inconsistent because this small change fixes the issue:
const float CONSTANT_PI_WORKAROUND = PI * 1.0;
uniform float using_custom_constant:hint_range(0.0, CONSTANT_PI_WORKAROUND);

this same code, workaround and non workaround errors in non- spatial shader_types

and for posterity these dont error in any shader type:

//none of this errors in any shader type
const float REPEATING = 0.1111;
const float ONE = 1.0;
const float ADDED = ONE + REPEATING;
uniform float repeating_to_added:hint_range(REPEATING,ADDED);
uniform float multiplied_ranges:hint_range(ONE*REPEATING,ADDED*ONE);

Steps to reproduce

Go into shader editor, for each shader type paste a code snippet and see if it errors

Minimal reproduction project (MRP)

N/A