Add exported function Parrot_set_HLL()

[barney]

Currently there is no easy way to set the hll root namespace via the embedding interface. This is bad, as this doesn't allow Parrot::Embed to find any symbol that isn't in the 'parrot' hll namespace. See ext/Parrot-Embed/t/pipp.t for an example.

Parrot_set_HLL() would call Parrot_register_HLL() and assign the returned HLL id to current_HLL of the interpreter.

Parrot_set_HLL() could also be used by set_hll() in compilers/pirc/new/pircompunit.c and in imcc.y.

Ticket #76 depends on this.

Any comments?

[barney]

This issue was discussed on #parrotsketch 2008-12-23.

The consensus was that messing with current_HLL is messy indeed. A better solution is to add on optional param 'hll' to Parrot::Embed::find_global(). The default of the parameter 'hll' would be 'parrot'. Once a sub is found, the sub knows it's appropriate hll root namespace.

[whiteknight]

Ability to set or change the current HLL will be added to the new embedding API, not to the existing API.

[NotFound]

There is no current_HLL in the interpreter struct. It was probably dropped during context refactors.

[dukeleto]

Does this TT make sense anymore? Please close if not.

[whiteknight]

I don't think this ticket does make sense any more. We probably could use more routines for working with NameSpaces in general, and HLL NameSpaces in particular, to the embedding API, but what this ticket is asking for is not valid anymore. If other things need to be added to the embedding API or any other API, those things should be asked for specifically.