add callable is/2

2018-01-19 00:08:55 -07:00
parent 1b402b2673
commit f9b53856ac
8 changed files with 353 additions and 247 deletions
--- a/src/prolog/macros.rs
+++ b/src/prolog/macros.rs
@@ -417,3 +417,9 @@ macro_rules! display {
        Line::Control(ControlInstruction::DisplayCall)
    )
 }
+
+macro_rules! is_on_heap {
+    () => (
+        Line::BuiltIn(BuiltInInstruction::IsOnHeap)
+    )
+}