Re^3: Perl_API get_sv and SvIV_set

[Util]

It sounds like you are looking for the opcode equivalent of the 'continue' statement. From a casual look at the differences in the output of these two commands:

perl -MO=Concise -e 'while ($z == 1) { $x=2;} continue {$y=3;}'
perl -MO=Concise -e 'while ($z == 1) { $x=2;}'

I would guess that the opcode is 'pp_next'.

[BUU]

Well, I modified pp_next by adding a "DIE" call in the middle of it but no loop I tried could trigger it. Doesn't seem to be the one I want.

[diotalevi]

There is no such op. If you add a continue block, you'll notice that lineseq has three arguments/statements instead of just two. If you want to run something at the end of every loop, alter the optree to wire your op in.

[BUU]

Heh. Not a bad idea if that is the only way to do it. Unfortunately I lack experience doing evil things to perl. Any idea on where I should be looking to do so? I understand perly.y has the grammar, or what there is of it, but I was a little confused how I could make it add an op.