read from streams.

2019-04-13 18:40:17 -06:00
parent ed17867be0
commit ae90554378
25 changed files with 1657 additions and 1318 deletions
--- a/src/prolog/machine/machine_errors.rs
+++ b/src/prolog/machine/machine_errors.rs
@@ -385,8 +385,6 @@ pub enum SessionError {
    NamelessEntry,
    OpIsInfixAndPostFix(ClauseName),
    ParserError(ParserError),
-    QueryFailure,
-    QueryFailureWithException(ClauseName),
    UserPrompt
 }

@@ -394,6 +392,7 @@ pub enum EvalSession {
    EntrySuccess,
    Error(SessionError),
    InitialQuerySuccess(AllocVarDict, HeapVarDict),
+    QueryFailure,
    SubsequentQuerySuccess,
 }