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simplify

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This commit is contained in:
Aleksey Kladov 2021-12-27 14:58:24 +03:00
parent 4d3ad04a9c
commit 23ce31e836
1 changed files with 2 additions and 12 deletions
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14
crates/mbe/src/expander/matcher.rs
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@ -726,10 +726,7 @@ fn match_meta_var(kind: &str, input: &mut TtIter) -> ExpandResult<Option<Fragmen
.map_err(|()| err!())
}
// `vis` is optional
"vis" => match input.eat_vis() {
Some(vis) => Ok(Some(vis)),
None => Ok(None),
},
"vis" => Ok(input.eat_vis()),
_ => Err(ExpandError::UnexpectedToken),
};
return tt_result.map(|it| it.map(Fragment::Tokens)).into();
@ -899,14 +896,7 @@ fn expect_lifetime(&mut self) -> Result<tt::TokenTree, ()> {
}
fn eat_vis(&mut self) -> Option<tt::TokenTree> {
let mut fork = self.clone();
match fork.expect_fragment(Visibility) {
ExpandResult { value: tt, err: None } => {
*self = fork;
tt
}
ExpandResult { value: _, err: Some(_) } => None,
}
self.expect_fragment(Visibility).value
}
fn eat_char(&mut self, c: char) -> Option<tt::TokenTree> {