#16 Different behaviour of "+" and "*"

[Anonymous]

When I consult term
s(+,X,0,X).
I get error message:

"SYNTAX ERROR:
ubc.cs.JLog.Parser.SyntaxErrorException: Expected ')'
at 5 : line,char(1,5)"

Same for "-" sign.

BUT NO error for signs "*" and "/"

Regards,
matejickaj (signAT) gmail (signDOT) com

[Glendon Holst]

Logged In: YES
user_id=436806

This is a bug in the parser. The difference is that + and - are also unary
operators, while * and / are only binary.

This is an issue in lists as well as parentheses, e.g.: L = ['+', a] or L=(+,a).

A work around is to enclose symbols which are unary operators in
parentheses if an atom is desired.

e.g.:

L=[(+),a].
L=((+),a).