#1733: calling convention broken
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Reporter: fperrad | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: core | Version: 2.6.0
Severity: high | Keywords:
Lang: | Patch:
Platform: |
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The scheme of calling convention used by Lua is broken.
With Lua, all known parameters are optional, and extra parameters or
vararg are collected by a final slurpy.
The following PIR code shows the problem :
{{{
.sub 'main' :main
$P1 = box "p1"
$P2 = box "p2"
$P3 = box "p3"
f($P1, $P2, $P3) # ok
f($P1, $P2) # ok
f($P1) # fails
.end
# f() has 2 known parameters
.sub 'f'
.param pmc p1 :optional
.param int has_p1 :opt_flag
.param pmc p2 :optional
.param int has_p2 :opt_flag
.param pmc extra :slurpy
unless has_p1 goto L1
say p1
unless has_p2 goto L1
say p2
$P0 = iter extra
L2:
unless $P0 goto L1
$P1 = shift $P0
say $P1
goto L2
L1:
.end
}}}
Here, the current output :
{{{
p1
p2
p3
p1
p2
FixedPMCArray: Cannot set array size to a negative number (-1)
current instr.: 'f' pc 45 (prm.pir:8)
called from Sub 'main' pc 40 (prm.pir:8)
}}}
--
Ticket URL: <https://trac.parrot.org/parrot/ticket/1733>
Parrot <https://trac.parrot.org/parrot/>
Parrot Development
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