Bump proc-macro2 in xtask

2 files changed, 4 insertions, 2 deletions

diff --git a/src/tools/rust-analyzer/xtask/Cargo.toml b/src/tools/rust-analyzer/xtask/Cargo.toml
index b505ee835b2..ebd8903ad8a 100644
--- a/src/tools/rust-analyzer/xtask/Cargo.toml
+++ b/src/tools/rust-analyzer/xtask/Cargo.toml
@@ -16,8 +16,7 @@ xflags = "0.3.0"
 time = { version = "0.3", default-features = false }
 zip = { version = "0.6", default-features = false, features = ["deflate", "time"] }
 stdx.workspace = true
-# https://github.com/dtolnay/proc-macro2/issues/475
-proc-macro2 = "=1.0.86"
+proc-macro2 = "1.0.93"
 quote = "1.0.20"
 ungrammar = "1.16.1"
 either.workspace = true
diff --git a/src/tools/rust-analyzer/xtask/src/codegen/grammar.rs b/src/tools/rust-analyzer/xtask/src/codegen/grammar.rs
index d5fe3236789..e20dda7fec3 100644
--- a/src/tools/rust-analyzer/xtask/src/codegen/grammar.rs
+++ b/src/tools/rust-analyzer/xtask/src/codegen/grammar.rs
@@ -397,6 +397,9 @@ fn generate_syntax_kinds(grammar: KindsSrc) -> String {
         if "{}[]()".contains(token) {
             let c = token.chars().next().unwrap();
             quote! { #c }
+            // underscore is an identifier in the proc-macro api
+        } else if *token == "_" {
+            quote! { _ }
         } else {
             let cs = token.chars().map(|c| Punct::new(c, Spacing::Joint));
             quote! { #(#cs)* }