fn validate_planning_variable_arguments(planning_variables: &[&syn::Field]) -> Result<(), Error> {
const PLANNING_VARIABLE_ATTRIBUTES: &[&str] = &[
"allows_unassigned",
"chained",
"value_range_provider",
"countable_range",
"candidate_values",
"nearby_value_candidates",
"nearby_entity_candidates",
"nearby_value_distance_meter",
"nearby_entity_distance_meter",
"construction_entity_order_key",
"construction_value_order_key",
];
for field in planning_variables {
let attr = get_attribute(&field.attrs, "planning_variable").unwrap();
for argument in attribute_argument_names(attr) {
if argument == "value_range" {
return Err(Error::new_spanned(
*field,
"`value_range` is not a supported planning_variable argument; use `value_range_provider`",
));
}
if !PLANNING_VARIABLE_ATTRIBUTES.contains(&argument.as_str()) {
return Err(Error::new_spanned(
*field,
format!("unsupported planning_variable argument `{argument}`"),
));
}
}
}
Ok(())
}
fn validate_scalar_hook_targets(planning_variables: &[&syn::Field]) -> Result<(), Error> {
const SCALAR_HOOK_ATTRIBUTES: &[&str] = &[
"candidate_values",
"nearby_value_candidates",
"nearby_entity_candidates",
"nearby_value_distance_meter",
"nearby_entity_distance_meter",
"construction_entity_order_key",
"construction_value_order_key",
];
for field in planning_variables {
let attr = get_attribute(&field.attrs, "planning_variable").unwrap();
let has_scalar_hook = SCALAR_HOOK_ATTRIBUTES
.iter()
.any(|key| has_attribute_argument(attr, key));
if !has_scalar_hook {
continue;
}
if parse_attribute_bool(attr, "chained").unwrap_or(false) {
return Err(Error::new_spanned(
*field,
"chained planning variables cannot declare scalar runtime hook attributes",
));
}
if !field_is_option_usize(&field.ty) {
return Err(Error::new_spanned(
*field,
"scalar runtime hook attributes require a non-chained Option<usize> planning variable",
));
}
}
Ok(())
}