update

1 files changed, 24 insertions, 0 deletions

diff --git a/src/libzisp/value/char.zig b/src/libzisp/value/char.zig
new file mode 100644
index 0000000..7034128
--- /dev/null
+++ b/src/libzisp/value/char.zig
@@ -0,0 +1,24 @@
+const Value = @import("../value.zig").Value;
+
+pub fn check(v: Value) bool {
+    return v.isPacked() and
+        !v.char.fixnum and
+        !v.char.ptr and
+        v.char.tag == .char;
+}
+
+pub fn assert(v: Value) void {
+    if (!check(v)) {
+        v.dump();
+        @panic("not char");
+    }
+}
+
+pub fn pack(c: u21) Value {
+    return .{ .char = .{c} };
+}
+
+pub fn unpack(v: Value) u21 {
+    assert(v);
+    return v.char.value;
+}