Class: FalseClass
Overview
The global value false is the only instance of class FalseClass and represents a logically false value in boolean expressions. The class provides operators allowing false to participate correctly in logical expressions.
Instance Method Summary (collapse)
-
- (Object) &
And---Returns false.
-
- (Object) ^
Exclusive Or---If obj is nil or false, returns false; otherwise, returns true.
-
- (Object) to_s
'nuf said...
-
- (Object) |
Or---Returns false if obj is nil or false; true otherwise.
Instance Method Details
- (false) &(obj) - (false) &(obj)
And---Returns false. obj is always evaluated as it is the argument to a method call---there is no short-circuit evaluation in this case.
|
|
# File 'object.c'
static VALUE
false_and(VALUE obj, VALUE obj2)
{
return Qfalse;
}
|
- (Boolean) ^(obj) - (Boolean) ^(obj)
Exclusive Or---If obj is nil or false, returns false; otherwise, returns true.
|
|
# File 'object.c'
static VALUE
false_xor(VALUE obj, VALUE obj2)
{
return RTEST(obj2)?Qtrue:Qfalse;
}
|
- (Object) to_s
'nuf said...
|
|
# File 'object.c'
static VALUE
false_to_s(VALUE obj)
{
return rb_usascii_str_new2("false");
}
|
- (Boolean) |(obj) - (Boolean) |(obj)
Or---Returns false if obj is nil or false; true otherwise.
|
|
# File 'object.c'
static VALUE
false_or(VALUE obj, VALUE obj2)
{
return RTEST(obj2)?Qtrue:Qfalse;
}
|
