The parsing of the numbers in the shader needs to be revised

[navy-cap-echo]

Godot version

v4.0.dev.20211117.official [175690957]

System information

Windows 10, Vulkan, NVIDIA GeForce GTX 970

Issue description

First of all, here is the context which allowed me to discover the problem.

I try to add an unsigned integer constant to a variable by adding a U behind the number.

uint a = 10U ;

This doesn't work ! IMHO that is already a problem !

It can be bypassed by using an overkilling casting :

uint a = uint(10) ;

Then I tried to add other characters, and there surprise, the compiler does not throw a warning or an error on the wrong number format :

int  a = 50ABCDEFGHIJddsdssdsqd ;

Same with hexadecimal number :

int  b = 0x50ABCDEFGHIJKLMNOPQRSTUVWXYZ ;

Same with float number :

float fa = 1.0ABCDEFGHIJKLM ;

Steps to reproduce

• Create a Sprite2D
• Assign an ImageTexture to the Sprite texture (size 200x200 for example)
• Create a ShaderMaterial for the Sprite2D material
• Create a canvas shader with the following code :

shader_type canvas_item;

void fragment() 
{
	float fa = 1.0ABCDEFGHIJKLM ;
	int  a = 50ABCDEFGHIJddsdssdsqd ;
	int  b = 0x50ABCDEFGHIJKLMNOPQRSTUVWXYZ ;
	//uint c = 10U ; 

	COLOR = vec4(float(a)/255.0,float(b)/255.0,0.0,1.0);
}

Minimal reproduction project

No response