fixed the funge stack types

src/stack.zig

@@ -1,8 +1,8 @@
 const std = @import("std");
-const vector = std.meta.Vector(2, u64);
+const vector = std.meta.Vector(2, i64);
 
 pub const Stack = struct {
-    data: std.ArrayList(u64),
+    data: std.ArrayList(i64),
     pub fn clear(self: *Stack) void {
         self.data.clearRetainingCapacity();
     }
@@ -14,37 +14,41 @@ pub const Stack = struct {
             try self.push(self.data.items[self.data.items.len - 1]);
         }
     }
-    pub fn init(comptime allocator: std.mem.Allocator) Stack {
+    pub fn init(allocator: std.mem.Allocator) Stack {
         return Stack{
-            .data = std.ArrayList(u64).init(allocator),
+            .data = std.ArrayList(i64).init(allocator),
         };
     }
-    pub fn pop(self: *Stack) u64 {
+    pub fn pop(self: *Stack) i64 {
         return if (self.data.popOrNull()) |v| v else 0;
     }
-    pub fn popVector(self: *Stack) [2]u64 {
+    pub fn popVector(self: *Stack) [2]i64 {
         const b = if (self.data.popOrNull()) |v| v else 0;
         const a = if (self.data.popOrNull()) |v| v else 0;
-        return [2]u64{ a, b };
+        return [2]i64{ a, b };
     }
-    pub fn push(self: *Stack, n: u64) !void {
+    pub fn push(self: *Stack, n: i64) !void {
         try self.data.append(n);
     }
-    pub fn pushVector(self: *Stack, v: [2]u64) !void {
+    pub fn pushVector(self: *Stack, v: [2]i64) !void {
         try self.data.appendSlice(v[0..2]);
     }
     pub fn swap(self: *Stack) !void {
         const v = self.popVector();
-        try self.pushVector([2]u64{ v[1], v[0] });
+        try self.pushVector([2]i64{ v[1], v[0] });
     }
 };
 
+test "all" {
+    std.testing.refAllDecls(@This());
+}
+
 test "clear" {
     var s = Stack.init(std.testing.allocator);
     defer s.deinit();
     s.clear();
     try std.testing.expect(s.pop() == 0);
-    try s.pushVector([2]u64{ 1, 2 });
+    try s.pushVector([2]i64{ 1, 2 });
     s.clear();
     try std.testing.expect(s.pop() == 0);
 }
@@ -52,34 +56,34 @@ test "duplicate" {
     var s = Stack.init(std.testing.allocator);
     defer s.deinit();
     try s.duplicate();
-    try std.testing.expectEqual(s.popVector(), @as(vector, [2]u64{ 0, 0 }));
+    try std.testing.expectEqual(s.popVector(), @as(vector, [2]i64{ 0, 0 }));
-    try s.pushVector([2]u64{ 1, 2 });
+    try s.pushVector([2]i64{ 1, 2 });
     try s.duplicate();
     try s.duplicate();
-    try std.testing.expectEqual(s.popVector(), @as(vector, [2]u64{ 2, 2 }));
+    try std.testing.expectEqual(s.popVector(), @as(vector, [2]i64{ 2, 2 }));
-    try std.testing.expectEqual(s.popVector(), @as(vector, [2]u64{ 1, 2 }));
+    try std.testing.expectEqual(s.popVector(), @as(vector, [2]i64{ 1, 2 }));
 }
 test "push and pop" {
     var s = Stack.init(std.testing.allocator);
     defer s.deinit();
     try std.testing.expect(s.pop() == 0);
-    try std.testing.expectEqual(s.popVector(), @as(vector, [2]u64{ 0, 0 }));
+    try std.testing.expectEqual(s.popVector(), @as(vector, [2]i64{ 0, 0 }));
     try s.push(1);
     try std.testing.expect(s.pop() == 1);
     try std.testing.expect(s.pop() == 0);
-    try s.pushVector([2]u64{ 2, 3 });
+    try s.pushVector([2]i64{ 2, 3 });
     try std.testing.expect(s.pop() == 3);
-    try std.testing.expectEqual(s.popVector(), @as(vector, [2]u64{ 0, 2 }));
+    try std.testing.expectEqual(s.popVector(), @as(vector, [2]i64{ 0, 2 }));
 }
 test "swap" {
     var s = Stack.init(std.testing.allocator);
     defer s.deinit();
     try s.swap();
-    try std.testing.expectEqual(s.popVector(), @as(vector, [2]u64{ 0, 0 }));
+    try std.testing.expectEqual(s.popVector(), @as(vector, [2]i64{ 0, 0 }));
     try s.push(1);
     try s.swap();
-    try std.testing.expectEqual(s.popVector(), @as(vector, [2]u64{ 1, 0 }));
+    try std.testing.expectEqual(s.popVector(), @as(vector, [2]i64{ 1, 0 }));
     try s.push(2);
     try s.swap();
-    try std.testing.expectEqual(s.popVector(), @as(vector, [2]u64{ 2, 0 }));
+    try std.testing.expectEqual(s.popVector(), @as(vector, [2]i64{ 2, 0 }));
 }