X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/ffee3ff61d01bece17fbf5f9da633f1917fa5c0a..9fdb8483d0df6457614b48340fce3eac629b436d:/perlvars.h diff --git a/perlvars.h b/perlvars.h index de3c63b..1a44e22 100644 --- a/perlvars.h +++ b/perlvars.h @@ -8,11 +8,11 @@ * */ -/****************/ -/* Truly global */ -/****************/ +/* +=head1 Global Variables +*/ -/* Don't forget to re-run embed.pl to propagate changes! */ +/* Don't forget to re-run regen/embed.pl to propagate changes! */ /* This file describes the "global" variables used by perl * This used to be in perl.h directly but we want to abstract out into @@ -102,10 +102,6 @@ PERLVARA(Gsig_ignoring, SIG_SIZE, int) /* which signals we are ignoring */ PERLVARA(Gsig_defaulting, SIG_SIZE, int) #endif -#ifndef PERL_IMPLICIT_CONTEXT -PERLVAR(Gsig_sv, SV*) -#endif - /* XXX signals are process-wide anyway, so we * ignore the implications of this for threading */ #ifndef HAS_SIGACTION @@ -120,6 +116,7 @@ PERLVAR(Gwatch_pvx, char*) PERLVAR(Gppaddr, Perl_ppaddr_t*) /* or opcode.h */ PERLVAR(Gcheck, Perl_check_t *) /* or opcode.h */ PERLVARA(Gfold_locale, 256, unsigned char) /* or perl.h */ +PERLVARA(Gcharclass, 256, U32) #endif #ifdef PERL_NEED_APPCTX @@ -157,8 +154,8 @@ PERLVARI(Gveto_cleanup, int, FALSE) /* exit without cleanup */ /* dummy variables that hold pointers to both runops functions, thus forcing * them *both* to get linked in (useful for Peek.xs, debugging etc) */ -PERLVARI(Grunops_std, runops_proc_t, MEMBER_TO_FPTR(Perl_runops_standard)) -PERLVARI(Grunops_dbg, runops_proc_t, MEMBER_TO_FPTR(Perl_runops_debug)) +PERLVARI(Grunops_std, runops_proc_t, Perl_runops_standard) +PERLVARI(Grunops_dbg, runops_proc_t, Perl_runops_debug) /* These are baked at compile time into any shared perl library. @@ -175,7 +172,7 @@ PERLVARI(Gsubversion, U8, PERL_SUBVERSION) sizeof(((struct interpreter*)0)->member) /* These might be useful. */ -PERLVARI(Ginterpreter_size, U16, sizeof(struct interpreter)) +PERLVARI(Ginterp_size, U16, sizeof(struct interpreter)) #if defined(PERL_GLOBAL_STRUCT) PERLVARI(Gglobal_struct_size, U16, sizeof(struct perl_vars)) #endif @@ -183,6 +180,61 @@ PERLVARI(Gglobal_struct_size, U16, sizeof(struct perl_vars)) /* This will be useful for subsequent releases, because this has to be the same in your libperl as in main(), else you have a mismatch and must abort. */ -PERLVARI(Ginterpreter_size_5_10_0, U16, +PERLVARI(Ginterp_size_5_10_0, U16, PERL_INTERPRETER_SIZE_UPTO_MEMBER(PERL_LAST_5_10_0_INTERP_MEMBER)) #endif + +/* +=for apidoc AmUx|Perl_keyword_plugin_t|PL_keyword_plugin + +Function pointer, pointing at a function used to handle extended keywords. +The function should be declared as + + int keyword_plugin_function(pTHX_ + char *keyword_ptr, STRLEN keyword_len, + OP **op_ptr) + +The function is called from the tokeniser, whenever a possible keyword +is seen. C points at the word in the parser's input +buffer, and C gives its length; it is not null-terminated. +The function is expected to examine the word, and possibly other state +such as L<%^H|perlvar/%^H>, to decide whether it wants to handle it +as an extended keyword. If it does not, the function should return +C, and the normal parser process will continue. + +If the function wants to handle the keyword, it first must +parse anything following the keyword that is part of the syntax +introduced by the keyword. See L for details. + +When a keyword is being handled, the plugin function must build +a tree of C structures, representing the code that was parsed. +The root of the tree must be stored in C<*op_ptr>. The function then +returns a constant indicating the syntactic role of the construct that +it has parsed: C if it is a complete statement, or +C if it is an expression. Note that a statement +construct cannot be used inside an expression (except via C +and similar), and an expression is not a complete statement (it requires +at least a terminating semicolon). + +When a keyword is handled, the plugin function may also have +(compile-time) side effects. It may modify C<%^H>, define functions, and +so on. Typically, if side effects are the main purpose of a handler, +it does not wish to generate any ops to be included in the normal +compilation. In this case it is still required to supply an op tree, +but it suffices to generate a single null op. + +That's how the C<*PL_keyword_plugin> function needs to behave overall. +Conventionally, however, one does not completely replace the existing +handler function. Instead, take a copy of C before +assigning your own function pointer to it. Your handler function should +look for keywords that it is interested in and handle those. Where it +is not interested, it should call the saved plugin function, passing on +the arguments it received. Thus C actually points +at a chain of handler functions, all of which have an opportunity to +handle keywords, and only the last function in the chain (built into +the Perl core) will normally return C. + +=cut +*/ + +PERLVARI(Gkeyword_plugin, Perl_keyword_plugin_t, Perl_keyword_plugin_standard)