The global value true is the only instance of class
TrueClass and represents a logically true value in boolean
expressions. The class provides operators allowing true to be
used in logical expressions.
And—Returns false if obj is nil or
false, true otherwise.
static VALUE
true_and(VALUE obj, VALUE obj2)
{
return RTEST(obj2)?Qtrue:Qfalse;
}
Exclusive Or—Returns true if obj is nil
or false, false otherwise.
static VALUE
true_xor(VALUE obj, VALUE obj2)
{
return RTEST(obj2)?Qfalse:Qtrue;
}