A single Abuild.interface conditional must
appear in parentheses after an if or
elseif statement. The conditional may be a
simple boolean variable reference, or it may be a call to any of
the provided conditional functions, each of which returns a
boolean value. Conditional functions may be nested as needed.
Any boolean argument described below may a be function call or a
simple boolean variable reference, thus allowing function calls
to nest. The following functions are defined:
and(bool1, bool2)Returns true if both expressions are true and false otherwise.
or(bool1, bool2)Returns true if either value is true.
not(bool)Returns true if the given value is false, or false otherwise.
equals(scalar1, scalar2)
Returns true if the two scalars contain the same contents.
The two values must be the same type. The
equals function may not be used to
compare lists.
matches(string, regex)
Returns true if the string value matches the given
Perl-compatible regular expression. Regular expression
matches may be applied only to strings. Note that
matches returns true if the regular
expression matches the whole string. If
you need to do a partial match, you must add
.* at the beginning and/or end of the
expression.
contains(list, scalar)Returns true if the given list contains the given scalar value. The scalar must have the same type as the list.
containsmatch(string-list, regex)
Returns true if the given list contains any elements that
match the given Perl-compatible regular expression. The list
must be a list of strings. As with
matches, the regular expression must match
the entirety of some member of the list.