[perl #113884] [BUG] Constant interpolation into regexes does not participate in LTM

[jn...@jnthn.net via RT]

On Thu Jun 28 08:14:23 2012, moritz wrote:
> < TimToady> oh, wait
> < TimToady> Variable matches are considered declarative if and only if 
>  the variable
> < TimToady> is known to represent a constant
> < TimToady> nr: constant $x = 'ab'; say ('ab' ~~ / a | b | $x /).Str
> <+p6eval> rakudo 88a9d6: OUTPUT«a␤»
> <+p6eval> ..niecza v19-4-g12b71c7: OUTPUT«ab␤»
> < TimToady> so niecza is correct to make a distinction there

Implemented now, and tests unfudged.

/jnthn