50 lines
1.4 KiB
Rust
50 lines
1.4 KiB
Rust
// This file is part of ICU4X. For terms of use, please see the file
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// called LICENSE at the top level of the ICU4X source tree
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// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
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use crate::*;
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use ::either::Either;
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/// A [`Writeable`] impl that delegates to one type or another type.
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impl<W0, W1> Writeable for Either<W0, W1>
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where
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W0: Writeable,
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W1: Writeable,
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{
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fn write_to<W: fmt::Write + ?Sized>(&self, sink: &mut W) -> fmt::Result {
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match self {
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Either::Left(w) => w.write_to(sink),
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Either::Right(w) => w.write_to(sink),
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}
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}
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fn write_to_parts<S: PartsWrite + ?Sized>(&self, sink: &mut S) -> fmt::Result {
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match self {
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Either::Left(w) => w.write_to_parts(sink),
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Either::Right(w) => w.write_to_parts(sink),
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}
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}
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fn writeable_length_hint(&self) -> LengthHint {
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match self {
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Either::Left(w) => w.writeable_length_hint(),
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Either::Right(w) => w.writeable_length_hint(),
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}
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}
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fn writeable_borrow(&self) -> Option<&str> {
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match self {
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Either::Left(w) => w.writeable_borrow(),
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Either::Right(w) => w.writeable_borrow(),
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}
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}
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#[cfg(feature = "alloc")]
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fn write_to_string(&self) -> Cow<'_, str> {
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match self {
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Either::Left(w) => w.write_to_string(),
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Either::Right(w) => w.write_to_string(),
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}
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}
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}
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