I prefer test first programming. Therefore we need some syntax to get
multi subs into the assembler. Albeit we even have two sets of MMD
function registering opcodes (object.ops:mmd* , pmc.ops:mmdvt*) these
are not adequate to implement a general MMD scheme. The opcodes allow
just 2-dimensional MMD and second, the opcodes don't really help to
define multi subs, as the MMD information should be attached to the Sub
object itself and not be created from distance by some opcode, IMHO.
Syntax proposal:
.sub foo @MULTI
.invocant Integer a
.invocant Float b
.param pmc c
...
The @MULTI pragma goes along with the C<pcc_sub_proto>, it just adds
another flag bit.
The C<.invocant> can easily be parsed in the C<sub_params> rule, the
terminal C<.invocant> is already defined. The C<type> rule allows
currently to specify only known types, this check can be skipped so that
arbitrary class names can be specified.
Comments welcome,
leo
