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use std::borrow::Cow; use std::convert::TryInto; use crate::parser::types::Field; use crate::resolver_utils::resolve_list; use crate::{ registry, ContextSelectionSet, InputType, InputValueError, InputValueResult, OutputType, Positioned, ServerResult, Type, Value, }; impl<T: Type, const N: usize> Type for [T; N] { fn type_name() -> Cow<'static, str> { Cow::Owned(format!("[{}]", T::qualified_type_name())) } fn qualified_type_name() -> String { format!("[{}]!", T::qualified_type_name()) } fn create_type_info(registry: &mut registry::Registry) -> String { T::create_type_info(registry); Self::qualified_type_name() } } impl<T: InputType, const N: usize> InputType for [T; N] { fn parse(value: Option<Value>) -> InputValueResult<Self> { if let Some(Value::List(values)) = value { let items: Vec<T> = values .into_iter() .map(|value| InputType::parse(Some(value))) .collect::<Result<_, _>>() .map_err(InputValueError::propagate)?; let len = items.len(); items.try_into().map_err(|_| { InputValueError::custom(format!( "Expected input type \"[{}; {}]\", found [{}; {}].", T::type_name(), N, T::type_name(), len )) }) } else { Err(InputValueError::expected_type(value.unwrap_or_default())) } } fn to_value(&self) -> Value { Value::List(self.iter().map(InputType::to_value).collect()) } } #[async_trait::async_trait] impl<T: OutputType, const N: usize> OutputType for [T; N] { async fn resolve( &self, ctx: &ContextSelectionSet<'_>, field: &Positioned<Field>, ) -> ServerResult<Value> { resolve_list(ctx, field, self.iter(), Some(self.len())).await } }