update

1 files changed, 14 insertions, 7 deletions

diff --git a/src/libzisp/value/char.zig b/src/libzisp/value/char.zig
index 6a38f0d..98bb26f 100644
--- a/src/libzisp/value/char.zig
+++ b/src/libzisp/value/char.zig
@@ -1,10 +1,11 @@
-const Value = @import("../value.zig").Value;
+const value = @import("../value.zig");
+
+const Value = value.Value;
+
+// Zig API
 
 pub fn check(v: Value) bool {
-    return v.isPacked() and
-        !v.char.fixnum and
-        !v.char.ptr and
-        v.char.tag == .char;
+    return v.isOther(.char);
 }
 
 pub fn assert(v: Value) void {
@@ -15,10 +16,16 @@ pub fn assert(v: Value) void {
 }
 
 pub fn pack(c: u21) Value {
-    return .{ .char = .{ .value = c } };
+    return .{ .char = .{ .char = c } };
 }
 
 pub fn unpack(v: Value) u21 {
     assert(v);
-    return @truncate(v.char.value);
+    return @truncate(v.char.char);
+}
+
+// Zisp API
+
+pub fn pred(v: Value) Value {
+    return value.boole.pack(check(v));
 }