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Delete Decoder::read_enum_variant

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This commit is contained in:
Mark Rousskov 2022-02-09 17:48:06 -05:00
parent 8def096c4d
commit 75614c06ee
2 changed files with 9 additions and 22 deletions
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12
compiler/rustc_macros/src/serialize.rs
View File

@ -58,14 +58,10 @@ fn decodable_body(
variants.len()
);
quote! {
::rustc_serialize::Decoder::read_enum_variant(
__decoder,
|__decoder, __variant_idx| {
match __variant_idx {
#match_inner
_ => panic!(#message),
}
})
match ::rustc_serialize::Decoder::read_usize(__decoder) {
#match_inner
_ => panic!(#message),
}
}
}
};

19
compiler/rustc_serialize/src/serialize.rs
View File

@ -201,15 +201,6 @@ pub trait Decoder {
fn read_str(&mut self) -> Cow<'_, str>;
fn read_raw_bytes_into(&mut self, s: &mut [u8]);
#[inline]
fn read_enum_variant<T, F>(&mut self, mut f: F) -> T
where
F: FnMut(&mut Self, usize) -> T,
{
let disr = self.read_usize();
f(self, disr)
}
fn read_seq<T, F>(&mut self, f: F) -> T
where
F: FnOnce(&mut Self, usize) -> T,
@ -473,11 +464,11 @@ impl<S: Encoder, T: Encodable<S>> Encodable<S> for Option<T> {
impl<D: Decoder, T: Decodable<D>> Decodable<D> for Option<T> {
fn decode(d: &mut D) -> Option<T> {
d.read_enum_variant(move |this, idx| match idx {
match d.read_usize() {
0 => None,
1 => Some(Decodable::decode(this)),
1 => Some(Decodable::decode(d)),
_ => panic!("Encountered invalid discriminant while decoding `Option`."),
})
}
}
}
@ -496,11 +487,11 @@ impl<S: Encoder, T1: Encodable<S>, T2: Encodable<S>> Encodable<S> for Result<T1,
impl<D: Decoder, T1: Decodable<D>, T2: Decodable<D>> Decodable<D> for Result<T1, T2> {
fn decode(d: &mut D) -> Result<T1, T2> {
d.read_enum_variant(|d, disr| match disr {
match d.read_usize() {
0 => Ok(T1::decode(d)),
1 => Err(T2::decode(d)),
_ => panic!("Encountered invalid discriminant while decoding `Result`."),
})
}
}
}