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Make tt generic over the span data

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This commit is contained in:
Lukas Wirth 2023-01-31 11:49:49 +01:00
parent d805c74c51
commit 41a46a78f2
48 changed files with 806 additions and 569 deletions
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20
crates/mbe/src/parser.rs
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@ -4,7 +4,7 @@
use smallvec::{smallvec, SmallVec};
use syntax::SmolStr;
use crate::{tt_iter::TtIter, ParseError};
use crate::{tt, tt_iter::TtIter, ParseError};
/// Consider
///
@ -54,7 +54,7 @@ pub(crate) enum Op {
Ignore { name: SmolStr, id: tt::TokenId },
Index { depth: u32 },
Repeat { tokens: MetaTemplate, kind: RepeatKind, separator: Option<Separator> },
Subtree { tokens: MetaTemplate, delimiter: Option<tt::Delimiter> },
Subtree { tokens: MetaTemplate, delimiter: tt::Delimiter },
Literal(tt::Literal),
Punct(SmallVec<[tt::Punct; 3]>),
Ident(tt::Ident),
@ -130,13 +130,13 @@ fn next_op(
Some(it) => it,
};
match second {
tt::TokenTree::Subtree(subtree) => match subtree.delimiter_kind() {
Some(tt::DelimiterKind::Parenthesis) => {
tt::TokenTree::Subtree(subtree) => match subtree.delimiter.kind {
tt::DelimiterKind::Parenthesis => {
let (separator, kind) = parse_repeat(src)?;
let tokens = MetaTemplate::parse(subtree, mode)?;
Op::Repeat { tokens, separator, kind }
}
Some(tt::DelimiterKind::Brace) => match mode {
tt::DelimiterKind::Brace => match mode {
Mode::Template => {
parse_metavar_expr(&mut TtIter::new(subtree)).map_err(|()| {
ParseError::unexpected("invalid metavariable expression")
@ -157,18 +157,18 @@ fn next_op(
tt::TokenTree::Leaf(leaf) => match leaf {
tt::Leaf::Ident(ident) if ident.text == "crate" => {
// We simply produce identifier `$crate` here. And it will be resolved when lowering ast to Path.
Op::Ident(tt::Ident { text: "$crate".into(), id: ident.id })
Op::Ident(tt::Ident { text: "$crate".into(), span: ident.span })
}
tt::Leaf::Ident(ident) => {
let kind = eat_fragment_kind(src, mode)?;
let name = ident.text.clone();
let id = ident.id;
let id = ident.span;
Op::Var { name, kind, id }
}
tt::Leaf::Literal(lit) if is_boolean_literal(lit) => {
let kind = eat_fragment_kind(src, mode)?;
let name = lit.text.clone();
let id = lit.id;
let id = lit.span;
Op::Var { name, kind, id }
}
tt::Leaf::Punct(punct @ tt::Punct { char: '$', .. }) => match mode {
@ -284,7 +284,7 @@ fn parse_metavar_expr(src: &mut TtIter<'_>) -> Result<Op, ()> {
let func = src.expect_ident()?;
let args = src.expect_subtree()?;
if args.delimiter_kind() != Some(tt::DelimiterKind::Parenthesis) {
if args.delimiter.kind != tt::DelimiterKind::Parenthesis {
return Err(());
}
@ -293,7 +293,7 @@ fn parse_metavar_expr(src: &mut TtIter<'_>) -> Result<Op, ()> {
let op = match &*func.text {
"ignore" => {
let ident = args.expect_ident()?;
Op::Ignore { name: ident.text.clone(), id: ident.id }
Op::Ignore { name: ident.text.clone(), id: ident.span }
}
"index" => {
let depth = if args.len() == 0 { 0 } else { args.expect_u32_literal()? };