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Rearrange to_internal.

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`TokenTree::Punct` is handled outside the `match`. This commits moves it
inside the `match`, avoiding the need for the `return`s and making it
easier to read.
This commit is contained in:
Nicholas Nethercote 2022-10-05 10:33:49 +11:00
parent 0922559768
commit 1e8dc45fb5
1 changed files with 40 additions and 41 deletions
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81
compiler/rustc_expand/src/proc_macro_server.rs
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@ -246,18 +246,49 @@ impl ToInternal<TokenStream> for (TokenTree<TokenStream, Span, Symbol>, &mut Rus
use rustc_ast::token::*;
let (tree, rustc) = self;
let (ch, joint, span) = match tree {
TokenTree::Punct(Punct { ch, joint, span }) => (ch, joint, span),
match tree {
TokenTree::Punct(Punct { ch, joint, span }) => {
let kind = match ch {
b'=' => Eq,
b'<' => Lt,
b'>' => Gt,
b'!' => Not,
b'~' => Tilde,
b'+' => BinOp(Plus),
b'-' => BinOp(Minus),
b'*' => BinOp(Star),
b'/' => BinOp(Slash),
b'%' => BinOp(Percent),
b'^' => BinOp(Caret),
b'&' => BinOp(And),
b'|' => BinOp(Or),
b'@' => At,
b'.' => Dot,
b',' => Comma,
b';' => Semi,
b':' => Colon,
b'#' => Pound,
b'$' => Dollar,
b'?' => Question,
b'\'' => SingleQuote,
_ => unreachable!(),
};
if joint {
tokenstream::TokenStream::token_joint(kind, span)
} else {
tokenstream::TokenStream::token_alone(kind, span)
}
}
TokenTree::Group(Group { delimiter, stream, span: DelimSpan { open, close, .. } }) => {
return tokenstream::TokenStream::delimited(
tokenstream::TokenStream::delimited(
tokenstream::DelimSpan { open, close },
delimiter.to_internal(),
stream.unwrap_or_default(),
);
)
}
TokenTree::Ident(self::Ident { sym, is_raw, span }) => {
rustc.sess().symbol_gallery.insert(sym, span);
return tokenstream::TokenStream::token_alone(Ident(sym, is_raw), span);
tokenstream::TokenStream::token_alone(Ident(sym, is_raw), span)
}
TokenTree::Literal(self::Literal {
kind: self::LitKind::Integer,
@ -270,7 +301,7 @@ impl ToInternal<TokenStream> for (TokenTree<TokenStream, Span, Symbol>, &mut Rus
let integer = TokenKind::lit(token::Integer, symbol, suffix);
let a = tokenstream::TokenTree::token_alone(minus, span);
let b = tokenstream::TokenTree::token_alone(integer, span);
return [a, b].into_iter().collect();
[a, b].into_iter().collect()
}
TokenTree::Literal(self::Literal {
kind: self::LitKind::Float,
@ -283,46 +314,14 @@ impl ToInternal<TokenStream> for (TokenTree<TokenStream, Span, Symbol>, &mut Rus
let float = TokenKind::lit(token::Float, symbol, suffix);
let a = tokenstream::TokenTree::token_alone(minus, span);
let b = tokenstream::TokenTree::token_alone(float, span);
return [a, b].into_iter().collect();
[a, b].into_iter().collect()
}
TokenTree::Literal(self::Literal { kind, symbol, suffix, span }) => {
return tokenstream::TokenStream::token_alone(
tokenstream::TokenStream::token_alone(
TokenKind::lit(kind.to_internal(), symbol, suffix),
span,
);
)
}
};
let kind = match ch {
b'=' => Eq,
b'<' => Lt,
b'>' => Gt,
b'!' => Not,
b'~' => Tilde,
b'+' => BinOp(Plus),
b'-' => BinOp(Minus),
b'*' => BinOp(Star),
b'/' => BinOp(Slash),
b'%' => BinOp(Percent),
b'^' => BinOp(Caret),
b'&' => BinOp(And),
b'|' => BinOp(Or),
b'@' => At,
b'.' => Dot,
b',' => Comma,
b';' => Semi,
b':' => Colon,
b'#' => Pound,
b'$' => Dollar,
b'?' => Question,
b'\'' => SingleQuote,
_ => unreachable!(),
};
if joint {
tokenstream::TokenStream::token_joint(kind, span)
} else {
tokenstream::TokenStream::token_alone(kind, span)
}
}
}