Use a more precise check

Author: lu-zero

Cargo.toml

@@ -19,6 +19,7 @@ debug = ["dep:anstream", "dep:anstyle", "dep:okhsl"]
 anstream = { version = "0.6.21", optional = true }
 anstyle = { version = "1.0.13", optional = true }
 okhsl = { version = "1.0.1", optional = true }
+unicode-ident = "1.0.19"
 unicode_categories = "0.1.1"
 winnow = { version = "0.7.0", features = ["simd"] }
 

src/tokenizer.rs

@@ -1,5 +1,6 @@
 use std::borrow::Cow;
 use unicode_categories::UnicodeCategories;
+use unicode_ident::is_xid_continue;
 use winnow::ascii::{digit0, digit1, till_line_ending, Caseless};
 use winnow::combinator::{alt, delimited, dispatch, eof, fail, opt, peek, terminated};
 use winnow::error::ContextError;
@@ -384,7 +385,7 @@ fn get_ident_named_placeholder_token<'i>(input: &mut &'i str) -> Result<Token<'i
 }
 
 fn get_braced_named_placeholder_token<'i>(input: &mut &'i str) -> Result<Token<'i>> {
-    delimited('{', take_until(1.., '}'), '}')
+    delimited('{', take_while(1.., is_xid_continue), '}')
         .with_taken()
         .parse_next(input)
         .map(|(index, token)| {