id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc	lang	patch	platform
816	PMC 'Undef' does not support logical_not	Austin_Hastings		"This code in Close:
{{{
   ok(!(o.flat()), ""flat: New object (undef flat) is false"");
}}}
compiles to:
{{{
    $P51 = o.""flat""()
    not $P52, $P51
    ""ok""($P52, ""flat: New object (undef flat) is false"")
}}}
And then fails, with:
{{{
logical_not() not implemented in class 'Undef'
}}}

Grepping for logical_not in *.pmc gives back only scalar.pmc.
 
  * While I know that Perl's Undef has 0/nil/false/"""" behavior, is that right for Parrot? (To what extent is Undef just a safe Null?)
 
  * Should there even be a 'not' opcode? We've got isfalse.

  * Should other pmc types be implementing logical_not? 

  * Should Undef be a subclass of scalar, and so inherit?
"	bug	new	normal		core	1.3.0	medium