custom fmt

src/interp/compile.zig

@@ -14,6 +14,18 @@ pub const sz_obj = struct {
     obj: usize = 0,
     obj2: usize = 0,
     tag: sz_tag = .int,
+    pub fn format(value: sz_obj, comptime fmt: []const u8, options: std.fmt.FormatOptions, writer: anytype) !void {
+        _ = fmt;
+        _ = options;
+        switch (value.tag) {
+            .int => try writer.print("i[{}]", .{@as(isize, @bitCast(value.obj))}),
+            .num => try writer.print("n[{}]", .{@as(f64, @bitCast(value.obj))}),
+            .bool => try writer.print("b[{}]", .{value.obj}),
+            .str => try writer.print("s[{s}]", .{@as([*]u8, @ptrFromInt(value.obj))[0..value.obj2]}),
+            .list => try writer.print("l[{s}]", .{@as([*]sz_obj, @ptrFromInt(value.obj))[0..value.obj2]}),
+            .err => try writer.print("err[]", .{}),
+        }
+    }
 };
 
 pub const sz_inst = union(enum) {
@@ -25,6 +37,19 @@ pub const sz_inst = union(enum) {
     unop: u16,
     jump: u16,
     ret,
+    pub fn format(value: sz_inst, comptime fmt: []const u8, options: std.fmt.FormatOptions, writer: anytype) !void {
+        _ = fmt;
+        _ = options;
+        switch (value) {
+            inline else => |n| {
+                if (@TypeOf(n) == void) {
+                    try writer.print("[{s}]", .{@tagName(value)});
+                } else {
+                    try writer.print("[{s} {}]", .{@tagName(value), n});
+                }
+            }
+        }
+    }
 };
 pub const sz_code = struct {
     consts: []sz_obj,

src/main.zig

@@ -23,10 +23,7 @@ pub fn main() !void {
     var vm = lib.vm.sz_vm.init(allocator, code);
     while (true) {
         try vm.step();
-        for (vm.stack.items) |i| {
-            std.debug.print("{} ", .{i.obj});
-        }
-        std.debug.print("\n", .{});
+        std.debug.print("{any}\n", .{vm.stack.items});
     }
 }