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)
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- (Object) &
And---Returns false.
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- (Object) ^
Exclusive Or---If obj is nil or false, returns false; otherwise, returns true.
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- (Object) to_s
'nuf said...
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- (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.
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# File 'object.c'
/*
* call-seq:
* false & obj -> false
* nil & obj -> false
*
* And---Returns <code>false</code>. <i>obj</i> is always
* evaluated as it is the argument to a method call---there is no
* short-circuit evaluation in this case.
*/
static VALUE
false_and(VALUE obj, VALUE obj2)
{
return Qfalse;
}
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- (Boolean) ^(obj) - (Boolean) ^(obj)
Exclusive Or---If obj is nil or false, returns false; otherwise, returns true.
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# File 'object.c'
/*
* call-seq:
* false ^ obj -> true or false
* nil ^ obj -> true or false
*
* Exclusive Or---If <i>obj</i> is <code>nil</code> or
* <code>false</code>, returns <code>false</code>; otherwise, returns
* <code>true</code>.
*
*/
static VALUE
false_xor(VALUE obj, VALUE obj2)
{
return RTEST(obj2)?Qtrue:Qfalse;
}
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- (Object) to_s
'nuf said...
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# File 'object.c'
/*
* call-seq:
* false.to_s -> "false"
*
* 'nuf said...
*/
static VALUE
false_to_s(VALUE obj)
{
return rb_usascii_str_new2("false");
}
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- (Boolean) |(obj) - (Boolean) |(obj)
Or---Returns false if obj is nil or false; true otherwise.
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# File 'object.c'
/*
* call-seq:
* false | obj -> true or false
* nil | obj -> true or false
*
* Or---Returns <code>false</code> if <i>obj</i> is
* <code>nil</code> or <code>false</code>; <code>true</code> otherwise.
*/
static VALUE
false_or(VALUE obj, VALUE obj2)
{
return RTEST(obj2)?Qtrue:Qfalse;
}
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