### 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
continue; 
		} else if (tk.type == TK_OP_SUB || tk.type == TK_OP_NOT || tk.type == TK_OP_BIT_INVERT || tk.type == TK_OP_INCREMENT || tk.type == TK_OP_DECREMENT) {
			Expression e;
			e.is_op = true;
			switch (tk.type) {
				case TK_OP_SUB:
					e.op = OP_NEGATE;
					break;
				case TK_OP_NOT:
					e.op = OP_NOT;
					break;
				case TK_OP_BIT_INVERT:
					e.op = OP_BIT_INVERT;
					break;
				case TK_OP_INCREMENT:
					e.op = OP_INCREMENT;
					break;
				case TK_OP_DECREMENT:
					e.op = OP_DECREMENT;
					break;
				default:
					ERR_FAIL_V(nullptr);
			}
			expression.push_back(e);
			continue;
		} else {
			bool valid = false;
			if (p_block && p_block->block_type == BlockNode::BLOCK_TYPE_FOR_EXPRESSION && tk.type == TK_PARENTHESIS_CLOSE) {
				valid = true;
				_set_tkpos(prepos);