update

1 files changed, 27 insertions, 0 deletions

diff --git a/src/libzisp/value/eof.zig b/src/libzisp/value/eof.zig
new file mode 100644
index 0000000..34ab35d
--- /dev/null
+++ b/src/libzisp/value/eof.zig
@@ -0,0 +1,27 @@
+const Value = @import("../value.zig").Value;
+const misc = @import("misc.zig");
+
+pub const eof = misc.eof;
+
+// Zig API
+
+pub fn check(v: Value) bool {
+    return v.bits == eof.bits;
+}
+
+pub fn assert(v: Value) void {
+    if (!check(v)) {
+        v.dump();
+        @panic("not bool");
+    }
+}
+
+// Zisp API
+
+pub fn get() Value {
+    return eof;
+}
+
+pub fn pred(v: Value) Value {
+    return if (check(v)) misc.t else misc.f;
+}