From 49a8a1c24ba49c1bda0d35c5686621c48841db3f Mon Sep 17 00:00:00 2001
From: Will Anderson <will@neuralplatform.ai>
Date: Sun, 3 May 2026 15:44:19 -0500
Subject: [PATCH] add % modulo operator to El lexer, parser, codegen

Lexer and parser already had Percent token and precedence on the
compiler/string-interp branch. This commit adds the missing is_int_expr
case for Percent so that modulo expressions over Int operands are
correctly typed as Int (enabling arithmetic dispatch rather than
falling through to string concat or untyped paths).

binop_to_c already mapped Percent -> % at HEAD; only is_int_expr
needed the Percent arm.
---
 el-compiler/src/codegen.el | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/el-compiler/src/codegen.el b/el-compiler/src/codegen.el
index c2aec70..7a94911 100644
--- a/el-compiler/src/codegen.el
+++ b/el-compiler/src/codegen.el
@@ -1771,6 +1771,12 @@ fn is_int_expr(expr: Map<String, Any>) -> Bool {
             }
             return false
         }
+        if str_eq(op, "Percent") {
+            if is_int_expr(expr["left"]) {
+                if is_int_expr(expr["right"]) { return true }
+            }
+            return false
+        }
         return false
     }
     return false