Struct ForwardingBuilder 

pub struct ForwardingBuilder<AP> { /* private fields */ }

A intermediate Builder without dyn state.

When different builder shall be hidden behind a dyn Builder it is required that all such builders have the same dyn state type. Thus, often non dyn state or the () unit type as dyn state is used. This wrapper builder now allows to wrap arbitrary builders (e.g. those with a dyn state) into a builder that dose has the () unit type as dyn state. So that it may be use to create cast it into dyn Builder with the () unit type as dyn state.

However, in order to create a valid artifact, the artifact is kept in its bin-state.

Also see the ClonedBuilder for an alternative.

Implementations

impl<AP> ForwardingBuilder<AP>

pub fn new<ArtCan, BCan, B>(inner: AP) -> Self

where B: Builder<ArtCan, BCan> + ?Sized, BCan: Can<AP::Builder> + CanStrong + CanSized<Self>, AP: Promise<Builder = B, BCan = BCan>, ArtCan: CanSized<B::Artifact> + Clone,

Wrap given Builder forwarding its artifact.

Trait Implementations

impl<ArtCan, AP, B, BCan> Builder<ArtCan, BCan> for ForwardingBuilder<AP>

where B: Builder<ArtCan, BCan> + ?Sized, BCan: Can<B> + CanStrong, AP: Promise<Builder = B, BCan = BCan>, ArtCan: CanSized<B::Artifact> + Clone,

type Artifact = <B as Builder<ArtCan, BCan>>::Artifact

The artifact type as produced by this builder.

type DynState = ()

Type of the dynamic state of this builder.

type Err = <B as Builder<ArtCan, BCan>>::Err

Error type returned by this Builder in case of failure to produce an Artifact.

fn build( &self, resolver: &mut Resolver<'_, ArtCan, BCan, Self::DynState>, ) -> Result<ArtCan::Bin, Self::Err>

Produces an artifact using the given Resolver for resolving dependencies.

fn init_dyn_state(&self) -> Self::DynState

Return an initial dynamic state for this builder.

impl<AP: Clone> Clone for ForwardingBuilder<AP>

fn clone(&self) -> ForwardingBuilder<AP>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<AP: Debug> Debug for ForwardingBuilder<AP>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.