Type Alias rustc_trait_selection::traits::SelectionResult
source · pub type SelectionResult<'tcx, T> = Result<Option<T>, SelectionError<'tcx>>;
Expand description
When performing resolution, it is typically the case that there can be one of three outcomes:
Ok(Some(r))
: success occurred with resultr
Ok(None)
: could not definitely determine anything, usually due to inconclusive type inference.Err(e)
: errore
occurred
Aliased Type§
enum SelectionResult<'tcx, T> {
Ok(Option<T>),
Err(SelectionError<'tcx>),
}
Variants§
Ok(Option<T>)
Contains the success value
Err(SelectionError<'tcx>)
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.