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Simplify a nested bool match

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Logically this first eliminates the innermost match by merging the patterns.
Then, in a second step, turns the newly innermost match into a `matches!` call.
This commit is contained in:
LingMan 2020-10-12 23:51:35 +02:00
parent 4ba5068815
commit fcec76bde4
1 changed files with 7 additions and 18 deletions
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25
compiler/rustc_ast_pretty/src/pprust/state.rs
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@ -156,24 +156,13 @@ fn tt_prepend_space(tt: &TokenTree, prev: &TokenTree) -> bool {
}
}
match tt {
TokenTree::Token(token) => match token.kind {
token::Comma => false,
_ => true,
},
TokenTree::Delimited(_, DelimToken::Paren, _) => match prev {
TokenTree::Token(token) => match token.kind {
token::Ident(_, _) => false,
_ => true,
},
_ => true,
},
TokenTree::Delimited(_, DelimToken::Bracket, _) => match prev {
TokenTree::Token(token) => match token.kind {
token::Pound => false,
_ => true,
},
_ => true,
},
TokenTree::Token(token) => token.kind != token::Comma,
TokenTree::Delimited(_, DelimToken::Paren, _) => {
!matches!(prev, TokenTree::Token(Token { kind: token::Ident(..), .. }))
}
TokenTree::Delimited(_, DelimToken::Bracket, _) => {
!matches!(prev, TokenTree::Token(Token { kind: token::Pound, .. }))
}
TokenTree::Delimited(..) => true,
}
}