rishi/scryer-prolog
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

do not count calls to $reify_switch as inferences

Browse Source
This commit is contained in:
Mark Thom
2019-02-17 11:51:24 -07:00
parent a898824b65
commit 896914b8e9
1 changed files with 3 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
src/prolog/lib/reif.pl
View File

@@ -5,18 +5,18 @@
:- use_module(library(control), [(\=)/2]).
:- use_module(library(dif)).
/* in essence, '$reify_switch'(T, Then_0, Else_0) is this:
/* in essence, '$reify_switch'(T, Then_0, Else_0) is semantically this:
( T == true -> call(Then_0)
; T == false -> call(Else_0)
; nonvar(T) -> throw(error(type_error(boolean, T), _))
; throw(error(instantiation_error, _))
).
but without creating choice points.
but it does not create choice points.
*/
if_(If_1, Then_0, Else_0) :-
call(If_1, T),
'$reify_switch'(T, Then_0, Else_0).
'$call_with_default_policy'('$reify_switch'(T, Then_0, Else_0)).
=(X, Y, T) :-
( X == Y -> T = true