### 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
return ERR_PARSE_ERROR;
			}
			ControlFlowNode *cf = alloc_node<ControlFlowNode>();
			cf->flow_op = FLOW_OP_IF;
#ifdef DEBUG_ENABLED
			keyword_completion_context = CF_IF_DECL;
#endif 
			Node *n = _parse_and_reduce_expression(p_block, p_function_info);
			if (!n) {
				return ERR_PARSE_ERROR;
			}
#ifdef DEBUG_ENABLED
			keyword_completion_context = CF_BLOCK;
#endif 
			if (n->get_datatype() != TYPE_BOOL) {
				_set_error(RTR("Expected a boolean expression."));
				return ERR_PARSE_ERROR;
			}
			tk = _get_token();
			if (tk.type != TK_PARENTHESIS_CLOSE) {
				_set_expected_error(")");
				return ERR_PARSE_ERROR;
			}
			BlockNode *block = alloc_node<BlockNode>();
			block->parent_block = p_block;
			cf->expressions.push_back(n);
			cf->blocks.push_back(block);
			p_block->statements.push_back(cf);
			Error err = _parse_block(block, p_function_info, true, p_can_break, p_can_continue);
			if (err) {