# Type Alias rustc_middle::query::queries::type_op_normalize_poly_fn_sig::ProvidedValue

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    pub type ProvidedValue<'tcx> = Result<&'tcx Canonical<'tcx, QueryResponse<'tcx, PolyFnSig<'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 Deref>::Target` instead.

## Aliased Type§

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

## Variants§

§1.0.0

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

Contains the success value

§1.0.0

### Err(NoSolution)

Contains the error value

## Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain `repr(...)` attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 8 bytes

Size for each variant:

- `Ok`: 8 bytes
- `Err`: 0 bytes