can parse $0 $1 etc

1 files changed, 10 insertions, 2 deletions

diff --git a/src/parse/mod.rs b/src/parse/mod.rs
index cec9551..853580d 100644
--- a/src/parse/mod.rs
+++ b/src/parse/mod.rs
@@ -359,7 +359,7 @@ fn is_symbol(x: u8) -> bool {
 }
 
 fn is_var_begin(x: u8) -> bool {
-    x.is_ascii_alphabetic()
+    x.is_ascii_alphanumeric()
 }
 fn is_var_name(x: u8) -> bool {
     x.is_ascii_alphanumeric() || x == b'_'
@@ -376,11 +376,19 @@ impl Parse for VarName {
             return Err(ParseError::Eof);
         }
 
+        let mut name = BString::new();
+
+        if b.peek().is_ascii_digit() {
+            while b.has() && b.peek().is_ascii_digit() {
+                name.push(b.adv());
+            }
+            return Ok(Self { name });
+        }
+
         if !is_var_begin(b.peek()) {
             return Err(ParseError::ExpectedAlphabetic);
         }
 
-        let mut name = BString::new();
         while b.has() {
             let x = b.peek();
             if is_var_name(x) {