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Re^2: Perl 5 interpreter

by Anonymous Monk
on Jan 12, 2011 at 08:49 UTC ( #881845=note: print w/replies, xml ) Need Help??

in reply to Re: Perl 5 interpreter
in thread Perl 5 interpreter

That throws text like this for example

(void)( { while (PL_curstack != PL_mainstack) { Perl_dounwind(-1); + (void)( { SV **sp = PL_stack_sp; PERL_SI * const prev = PL_curstacki +nfo->si_prev; if (!prev) { fprintf((PL_stderrgv && (((svtype)((PL_std +errgv)->sv_flags & 0xff)) == SVt_PVGV) && (((PL_stderrgv)->sv_u.svu_g +p)->gp_io) && ((XPVIO*) ((((PL_stderrgv)->sv_u.svu_gp)->gp_io))->sv_a +ny)->xio_ofp ? ((XPVIO*) ((((PL_stderrgv)->sv_u.svu_gp)->gp_io))->sv_ +any)->xio_ofp : stderr), "panic: POPSTACK\n"); Perl_my_exit(1); } (vo +id)( { ((XPVAV*) (PL_curstack)->sv_any)->xav_fill = sp - PL_stack_bas +e; PL_stack_base = ((prev->si_stack)->sv_u.svu_array); PL_stack_max = + PL_stack_base + ((XPVAV*) (prev->si_stack)->sv_any)->xav_max; sp = P +L_stack_sp = PL_stack_base + ((XPVAV*) (prev->si_stack)->sv_any)->xav +_fill; PL_curstack = prev->si_stack; } ); PL_curstackinfo = prev; } ) +; } } );

That is unreadable

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Re^3: Perl 5 interpreter
by Corion (Pope) on Jan 12, 2011 at 08:52 UTC

    Which is why Perl programmers use macros, to hide the complexity.

    I guess this is code from the preamble to an XS sub that marks the Perl stack, or maybe code from the end of an XS sub that restores the previous stack state. If you show the original macros, it's maybe easier to explain.

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