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-rw-r--r--crates/mbe/src/mbe_expander/transcriber.rs2
-rw-r--r--crates/mbe/src/parser.rs4
-rw-r--r--crates/mbe/src/syntax_bridge.rs3
-rw-r--r--crates/mbe/src/tests.rs12
4 files changed, 18 insertions, 3 deletions
diff --git a/crates/mbe/src/mbe_expander/transcriber.rs b/crates/mbe/src/mbe_expander/transcriber.rs
index 616119ba9..57592dc92 100644
--- a/crates/mbe/src/mbe_expander/transcriber.rs
+++ b/crates/mbe/src/mbe_expander/transcriber.rs
@@ -97,7 +97,7 @@ fn expand_subtree(
97 err = err.or(e); 97 err = err.or(e);
98 arena.push(tt.into()); 98 arena.push(tt.into());
99 } 99 }
100 Op::Var { name, kind: _ } => { 100 Op::Var { name, .. } => {
101 let ExpandResult { value: fragment, err: e } = expand_var(ctx, name); 101 let ExpandResult { value: fragment, err: e } = expand_var(ctx, name);
102 err = err.or(e); 102 err = err.or(e);
103 push_fragment(arena, fragment); 103 push_fragment(arena, fragment);
diff --git a/crates/mbe/src/parser.rs b/crates/mbe/src/parser.rs
index 6b46a1673..c3fdd4040 100644
--- a/crates/mbe/src/parser.rs
+++ b/crates/mbe/src/parser.rs
@@ -101,7 +101,9 @@ fn next_op<'a>(
101 Op::Repeat { subtree, separator, kind } 101 Op::Repeat { subtree, separator, kind }
102 } 102 }
103 tt::TokenTree::Leaf(leaf) => match leaf { 103 tt::TokenTree::Leaf(leaf) => match leaf {
104 tt::Leaf::Punct(..) => return Err(ExpandError::UnexpectedToken), 104 tt::Leaf::Punct(_) => {
105 return Err(ExpandError::UnexpectedToken);
106 }
105 tt::Leaf::Ident(ident) => { 107 tt::Leaf::Ident(ident) => {
106 let name = &ident.text; 108 let name = &ident.text;
107 let kind = eat_fragment_kind(src, mode)?; 109 let kind = eat_fragment_kind(src, mode)?;
diff --git a/crates/mbe/src/syntax_bridge.rs b/crates/mbe/src/syntax_bridge.rs
index 265c0d63d..2bec7fd49 100644
--- a/crates/mbe/src/syntax_bridge.rs
+++ b/crates/mbe/src/syntax_bridge.rs
@@ -313,7 +313,7 @@ trait TokenConvertor {
313 return; 313 return;
314 } 314 }
315 315
316 result.push(if k.is_punct() { 316 result.push(if k.is_punct() && k != UNDERSCORE {
317 assert_eq!(range.len(), TextSize::of('.')); 317 assert_eq!(range.len(), TextSize::of('.'));
318 let delim = match k { 318 let delim = match k {
319 T!['('] => Some((tt::DelimiterKind::Parenthesis, T![')'])), 319 T!['('] => Some((tt::DelimiterKind::Parenthesis, T![')'])),
@@ -378,6 +378,7 @@ trait TokenConvertor {
378 let leaf: tt::Leaf = match k { 378 let leaf: tt::Leaf = match k {
379 T![true] | T![false] => make_leaf!(Ident), 379 T![true] | T![false] => make_leaf!(Ident),
380 IDENT => make_leaf!(Ident), 380 IDENT => make_leaf!(Ident),
381 UNDERSCORE => make_leaf!(Ident),
381 k if k.is_keyword() => make_leaf!(Ident), 382 k if k.is_keyword() => make_leaf!(Ident),
382 k if k.is_literal() => make_leaf!(Literal), 383 k if k.is_literal() => make_leaf!(Literal),
383 LIFETIME_IDENT => { 384 LIFETIME_IDENT => {
diff --git a/crates/mbe/src/tests.rs b/crates/mbe/src/tests.rs
index dff6e98c2..f10e7a9b6 100644
--- a/crates/mbe/src/tests.rs
+++ b/crates/mbe/src/tests.rs
@@ -992,6 +992,18 @@ fn test_tt_composite2() {
992} 992}
993 993
994#[test] 994#[test]
995fn test_underscore() {
996 parse_macro(
997 r#"
998 macro_rules! foo {
999 ($_:tt) => { 0 }
1000 }
1001 "#,
1002 )
1003 .assert_expand_items(r#"foo! { => }"#, r#"0"#);
1004}
1005
1006#[test]
995fn test_lifetime() { 1007fn test_lifetime() {
996 parse_macro( 1008 parse_macro(
997 r#" 1009 r#"