### Godot version

4.0.3

### System information

Win7

### Issue description

![image](https://github.com/godotengine/godot/assets/28286958/abec9d3c-e078-424c-9430-d9fe8897aad6)


### Steps to reproduce

1. Create shader
2. Add uint with hex, e.g. 0xffffu

### Minimal reproduction project

N/A
#define GETCHAR(m_idx) (((char_idx + m_idx) < code.length()) ? code[char_idx + m_idx] : char32_t(0))
	while (true) {
		char_idx++;
		switch (GETCHAR(-1)) {
			case 0:
				return _make_token(TK_EOF);
			case 0xFFFF:
				return _make_token(TK_CURSOR); 
			case '\t':
			case '\r':
			case ' ':
				continue;
			case '\n':
				tk_line++;
				continue;
			case '/': {
				switch (GETCHAR(0)) {