From 99cc27200fe77f3f3d296b5ee6bbd2641c1473f7 Mon Sep 17 00:00:00 2001
From: "Kartik K. Agaram" <vc@akkartik.com>
Date: Sat, 24 Jul 2021 21:35:52 -0700
Subject: [PATCH] .

---
 shell/infix.mu | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/shell/infix.mu b/shell/infix.mu
index 7df3d01b..41e8fa5d 100644
--- a/shell/infix.mu
+++ b/shell/infix.mu
@@ -406,6 +406,9 @@ fn test-infix {
 
 # helpers
 
+# return true if x is composed entirely of operator graphemes, optionally prefixed with some '$'s
+# some operator, some non-operator => pre-tokenized symbol; return false
+# all '$'s => return false
 fn operator-symbol? _x: (addr cell) -> _/eax: boolean {
   var x/esi: (addr cell) <- copy _x
   {