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/io.rs
+++ b/src/prolog/io.rs
@@ -185,6 +185,8 @@ impl fmt::Display for BuiltInInstruction {
                write!(f, "is_atomic {}", r),
            &BuiltInInstruction::IsInteger(r) =>
                write!(f, "is_integer {}", r),
+            &BuiltInInstruction::IsOnHeap =>
+                write!(f, "call_is A1, A2"),  
            &BuiltInInstruction::IsVar(r) =>
                write!(f, "is_var {}", r),            
            &BuiltInInstruction::ResetBlock =>