#1477: [embed] expose non-vararg-based sub/method call-ins
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Reporter: plobsing | Owner:
Type: feature | Status: new
Priority: normal | Milestone:
Component: none | Version: 2.1.0
Severity: medium | Keywords:
Lang: | Patch:
Platform: |
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The embedding API currently exposes Parrot_ext_call to provide call-ins on
subs and methods. Parrot_ext_call uses a va_list for parameters and return
locations. This is fine only if the signature to the call can be
determined statically. AFAIK, there is no portable way to build up a
va_list at runtime.
Being a VM for dynamic languages, there are going to be cases where
embedders want to decide things like number of arguments/returns at
runtime (yay dynamicism!). A good example of this is
&Parrot::Embed::invoke which can only make "S->P" calls ATM.
Providing an equivalent function that took an aggregate (either C-ish or
Parrot-ish) instead of the va_list would allow for dynamic call-ins.
--
Ticket URL: <https://trac.parrot.org/parrot/ticket/1477>
Parrot <https://trac.parrot.org/parrot/>
Parrot Development
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