From 74a24adc8ecc8bded9d24ccede171da188696122 Mon Sep 17 00:00:00 2001 From: Edwin Cheng Date: Fri, 8 Jan 2021 14:00:16 +0800 Subject: Fix bug when $crate in LHS in mbe --- crates/mbe/src/mbe_expander/transcriber.rs | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) (limited to 'crates/mbe/src/mbe_expander') diff --git a/crates/mbe/src/mbe_expander/transcriber.rs b/crates/mbe/src/mbe_expander/transcriber.rs index 57f3f104d..27b2ac777 100644 --- a/crates/mbe/src/mbe_expander/transcriber.rs +++ b/crates/mbe/src/mbe_expander/transcriber.rs @@ -119,11 +119,10 @@ fn expand_subtree( } fn expand_var(ctx: &mut ExpandCtx, v: &SmolStr, id: tt::TokenId) -> ExpandResult { - if v == "crate" { - // We simply produce identifier `$crate` here. And it will be resolved when lowering ast to Path. - let tt = tt::Leaf::from(tt::Ident { text: "$crate".into(), id }).into(); - ExpandResult::ok(Fragment::Tokens(tt)) - } else if !ctx.bindings.contains(v) { + // We already handle $crate case in mbe parser + debug_assert!(v != "crate"); + + if !ctx.bindings.contains(v) { // Note that it is possible to have a `$var` inside a macro which is not bound. // For example: // ``` -- cgit v1.2.3