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/* You may distribute under the terms of either the GNU General Public License
* or the Artistic License (the same terms as Perl itself)
*
* (C) Paul Evans, 2021-2022 -- leonerd@leonerd.org.uk
*/
#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "object_pad.h"
#include "perl-backcompat.c.inc"
static void trigger_gen_accessor_ops(pTHX_ FieldMeta *fieldmeta, SV *hookdata, void *_funcdata, enum AccessorType type, struct AccessorGenerationCtx *ctx)
{
if(type != ACCESSOR_WRITER)
return;
OP *selfop;
OP *callop = newLISTOP(OP_LIST, 0,
selfop = newOP(OP_PADSV, 0), NULL);
callop = op_append_list(OP_LIST, callop,
newMETHOP_named(OP_METHOD_NAMED, 0, newSVpvn_share(SvPV_nolen(hookdata), SvCUR(hookdata), 0)));
selfop->op_targ = PADIX_SELF;
callop = op_convert_list(OP_ENTERSUB, OPf_STACKED, callop);
ctx->post_bodyops = op_append_list(OP_LINESEQ, ctx->post_bodyops, callop);
return;
}
static void trigger_seal(pTHX_ FieldMeta *fieldmeta, SV *hookdata, void *_funcdata)
{
if(mop_field_get_attribute(fieldmeta, "writer"))
return;
warn("Applying :Trigger attribute to field %" SVf " is not useful without a :writer",
SVfARG(mop_field_get_name(fieldmeta)));
}
static const struct FieldHookFuncs trigger_hooks = {
.ver = OBJECTPAD_ABIVERSION,
.flags = OBJECTPAD_FLAG_ATTR_MUST_VALUE,
.permit_hintkey = "Object::Pad::FieldAttr::Trigger/Trigger",
.seal = &trigger_seal,
.gen_accessor_ops = &trigger_gen_accessor_ops,
};
MODULE = Object::Pad::FieldAttr::Trigger PACKAGE = Object::Pad::FieldAttr::Trigger
BOOT:
register_field_attribute("Trigger", &trigger_hooks, NULL);
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