From e28fb1684065f65959ef930719f6823ce5fa5199 Mon Sep 17 00:00:00 2001
From: Nat Quayle Nelson <natquaylenelson@gmail.com>
Date: Sun, 19 Feb 2023 08:09:38 -0700
Subject: [PATCH] localVar warning. Close #112

---
 src/kiss/Kiss.hx         | 16 ++++++++++++++--
 src/kiss/Macros.hx       |  1 +
 src/kiss/SpecialForms.hx |  2 ++
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/kiss/Kiss.hx b/src/kiss/Kiss.hx
index 3d56f02..4b0b069 100644
--- a/src/kiss/Kiss.hx
+++ b/src/kiss/Kiss.hx
@@ -66,7 +66,8 @@ typedef KissState = {
     localVarsInScope:Array<Var>,
     conversionStack:Array<ReaderExp>,
     stateChanged:Bool,
-    printFieldsCalls:Array<ReaderExp>
+    printFieldsCalls:Array<ReaderExp>,
+    localVarCalls:Array<ReaderExp>
 };
 #end
 
@@ -186,7 +187,8 @@ class Kiss {
             localVarsInScope: [],
             conversionStack: [],
             stateChanged: false,
-            printFieldsCalls: []
+            printFieldsCalls: [],
+            localVarCalls: []
         };
 
         k.doc = (form:String, minArgs:Null<Int>, maxArgs:Null<Int>, expectedForm = "", doc = "") -> {
@@ -751,5 +753,15 @@ class Kiss {
     public static function convert(k:KissState, exp:ReaderExp) {
         return readerExpToHaxeExpr(exp, k);
     }
+
+    public static function localVarWarning(k:KissState) {
+        if (k.localVarCalls.length > 0 && k.printFieldsCalls.length > 0) {
+            for (call in k.localVarCalls) {
+                KissError.warnFromExp(call, 'variables declared with with `localVar` are incompatible with printAll macros. Use `let` instead.');
+            }
+            k.localVarCalls = [];
+        }
+    }
+
     #end
 }
diff --git a/src/kiss/Macros.hx b/src/kiss/Macros.hx
index 7970d86..4cfe349 100644
--- a/src/kiss/Macros.hx
+++ b/src/kiss/Macros.hx
@@ -1356,6 +1356,7 @@ class Macros {
 
         function printAll (locals:Bool, nullCheck:Bool, wholeExp:ReaderExp, exps:Array<ReaderExp>, k:KissState) {
             k.printFieldsCalls.push(wholeExp);
+            k.localVarWarning();
             var b = wholeExp.expBuilder();
             var list = if (locals) k.localVarsInScope else k.varsInScope;
             if (!locals && k.inStaticFunction) {
diff --git a/src/kiss/SpecialForms.hx b/src/kiss/SpecialForms.hx
index 9ca002e..b0e1937 100644
--- a/src/kiss/SpecialForms.hx
+++ b/src/kiss/SpecialForms.hx
@@ -188,6 +188,8 @@ class SpecialForms {
 
         k.doc("deflocal", 2, 3, "(localVar <optional :type> <variable> <optional: &mut> <value>)");
         map["deflocal"] = (wholeExp:ReaderExp, args:Array<ReaderExp>, k:KissState) -> {
+            k.localVarCalls.push(wholeExp);
+            k.localVarWarning();
             EVars(toVars(args[0], args[1], k)).withMacroPosOf(wholeExp);
         };
         renameAndDeprecate("deflocal", "localVar");