Trait RuntimeIndexSource 

pub trait RuntimeIndexSource: Send + Sync {
    // Required method
    fn value_at_runtime_index(
        &self,
        cx: &mut Cx,
        index: i64,
    ) -> Result<Option<Value>>;
}

Source of values addressed by contiguous integer keys.

This keeps array projection independent from any one table implementation: mutation tables, language objects, or host-backed stores can all provide the same integer-key lookup surface without adding a dependency edge.

Required Methods

fn value_at_runtime_index( &self, cx: &mut Cx, index: i64, ) -> Result<Option<Value>>

Returns the value at index, or None to end the contiguous projection.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<F> RuntimeIndexSource for RuntimeIndexLookup<F>

where F: Fn(&mut Cx, i64) -> Result<Option<Value>> + Send + Sync,