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use an anonymous variable

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Markus Triska
2020-04-25 19:59:38 +02:00
parent ae9232a2cb
commit b0a5df2838
1 changed files with 1 additions and 1 deletions
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src/prolog/lib/charsio.pl
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@@ -47,7 +47,7 @@ extend_var_list(Value, VarList, NewVarList, VarType) :-
term_variables(Value, Vars),
extend_var_list_(Vars, 0, VarList, NewVarList, VarType).
extend_var_list_([], N, VarList, VarList, _).
extend_var_list_([], _, VarList, VarList, _).
extend_var_list_([V|Vs], N, VarList, NewVarList, VarType) :-
( var_list_contains_variable(VarList, V) ->
extend_var_list_(Vs, N, VarList, NewVarList, VarType)