dynclasses/dynlexpad.pmc provides (or should eventually provide) a more
dynamic lexpad (similar to the deprecated scratchpad.pmc). It's not
finished yet, it doesn't consult LexInfo for static lexicals yet.
Before working more on it, I'd like to know from HLL authors, what they
need.
Currently it looks like this
SYNOPSIS
.sub _load :immediate # (1)
$P0 = loadlib 'dynlexpad'
.end
.HLL "foo", "" # or "foo_group" - load dynamic PMCs too
.HLL_map .LexPad -> .DynLexPad # (2)
.sub main :main :lex # (3)
$P0 = new .Integer
store_lex 0, 'a', $P0 # (4)
...
$P1 = find_lex 'a' # no pad_depth (yet)
.end
DESCRIPTION
(1) The :immediate sub is run before the parsing proceeds, the DynLexPad
is already avialable at (2) so that .constant syntax works. (2) installs
for the given HLL named "foo" the DynLexPad as the one to be used.
(3) denotes the main sub as needing a lexpad (see also pdd20)
(4) stores the lexical into the DynLexPad hash as a new entry. The
'pad_depth' integer is needed for an initial store_lex, but otherwise
ignored, specifically it doesn not allow (yet) a store into an outer lexpad.
See also t/dynclass/dynlexpad.t and dynclasses/dynlexpad.pmc
Comments welcome
leo
