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Introduce HygieneFrames for proper token hyginee

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This commit is contained in:
Edwin Cheng 2021-01-02 20:25:05 +08:00
parent 51d29fe554
commit fe5340d970
7 changed files with 184 additions and 54 deletions
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11
crates/mbe/src/parser.rs
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@ -8,7 +8,7 @@ use crate::{tt_iter::TtIter, ExpandError, MetaTemplate};
#[derive(Clone, Debug, PartialEq, Eq)]
pub(crate) enum Op {
Var { name: SmolStr, kind: Option<SmolStr> },
Var { name: SmolStr, kind: Option<SmolStr>, id: tt::TokenId },
Repeat { subtree: MetaTemplate, kind: RepeatKind, separator: Option<Separator> },
Leaf(tt::Leaf),
Subtree(MetaTemplate),
@ -106,18 +106,21 @@ fn next_op<'a>(first: &tt::TokenTree, src: &mut TtIter<'a>, mode: Mode) -> Resul
}
let name = UNDERSCORE.clone();
let kind = eat_fragment_kind(src, mode)?;
Op::Var { name, kind }
let id = punct.id;
Op::Var { name, kind, id }
}
tt::Leaf::Ident(ident) => {
let name = ident.text.clone();
let kind = eat_fragment_kind(src, mode)?;
Op::Var { name, kind }
let id = ident.id;
Op::Var { name, kind, id }
}
tt::Leaf::Literal(lit) => {
if is_boolean_literal(&lit) {
let name = lit.text.clone();
let kind = eat_fragment_kind(src, mode)?;
Op::Var { name, kind }
let id = lit.id;
Op::Var { name, kind, id }
} else {
bail!("bad var 2");
}