## ProvidedValue

# Type Alias ProvidedValue

Source

    pub type ProvidedValue<'tcx> = Result<&'tcx Canonical<'tcx, QueryResponse<'tcx, ()>>, NoSolution>;

Expand description

This type alias specifies the type returned from query providers and the type used for decoding. For regular queries this is the declared returned type `V`, but `arena_cache` will use `<V as ArenaCached>::Provided` instead.

## Aliased Type§

    pub enum ProvidedValue<'tcx> {
        Ok(&'tcx Canonical<TyCtxt<'tcx>, QueryResponse<'tcx, ()>>),
        Err(NoSolution),
    }

## Variants§

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### Ok(&'tcx Canonical<TyCtxt<'tcx>, QueryResponse<'tcx, ()>>)

Contains the success value

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### Err(NoSolution)

Contains the error value

## Layout§

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.