add 'e' as evaluable functor for Euler's constant (#832)

2021-02-20 18:31:47 -07:00
parent a9fe2ab5c4
commit eb5ea28bcd
2 changed files with 9 additions and 0 deletions
--- a/src/machine/arithmetic_ops.rs
+++ b/src/machine/arithmetic_ops.rs
@@ -224,6 +224,9 @@ impl MachineState {
                &HeapCellValue::Atom(ref name, _) if name.as_str() == "pi" => {
                    interms.push(Number::Float(OrderedFloat(f64::consts::PI)))
                }
+                &HeapCellValue::Atom(ref name, _) if name.as_str() == "e" => {
+                    interms.push(Number::Float(OrderedFloat(f64::consts::E)))
+                }
                &HeapCellValue::NamedStr(arity, ref name, _) => {
                    let evaluable_stub = MachineError::functor_stub(name.clone(), arity);