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* refactor and regularise label/statement grammarZefram2010-10-251-1/+1
| | | | | | | | | | | | | | | | | | | | Refactoring of the grammar around statements. New production <barestmt> encompasses a statement without label. It includes all statement types, including declarations, with no unnecessary intermediate non-terminals. It generates an op tree for the statement's content, with no leading state op. The <fullstmt> production has just one rule, consisting of optional label followed by <barestmt>. It puts a state op on the front of the statement's content ops. To support the regular statement op structure, the op sequence for for(;;) loops no longer has a second state op between the initialisation and the loop. Instead, the unstack op type is slightly adapted to achieve the stack clearing without a state op. The newFOROP() constructor function no longer generates a state op, that now being the job of the <fullstmt> production. Consequently it no longer takes a parameter stating what label is to go in the state op. This brings it in line with the other op constructors.
* Rename stashes when they move aroundFather Chrysostomos2010-10-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | This is yet another patch in preparation for [perl #75176] (I keep saying that.). It uses the recently-added functions hv_name_add and hv_name_delete, to add and remove names when mro_package_moved is called. mro_package_moved’s calling convention needed to change to make this work, which is the bulk of the patch. Code that was calling mro_package_moved was also doing it sometimes when it was unnecessary. If the stash being assigned over had no name, then there was no possibiiity of its being in the symbol table. This probably fixes [perl #77358] (isa warnings), though I have not tested that yet. One user-visible change this introduces is that a detached glob whose stash loses its name will no longer stringify the same way (a bit like a glob that loses its stash pointer; except that it becomes *__ANON__::foo instead of "").
* Add functions for adding and deleting stash namesFather Chrysostomos2010-10-221-0/+2
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* full API for cop hint hashesZefram2010-10-211-27/+23
| | | | | | | | | | | | | Expose cop hint hashes as a type COPHH, with a cophh_* API which is a macro layer over the refcounted_he_* API. The documentation for cophh_* describes purely API-visible behaviour, whereas the refcounted_he_* documentation describes the functions mainly in terms of the implementation. Revise the cop_hints_* API, using the flags parameter consistently and reimplementing in terms of cophh_*. Use the cophh_* and cop_hints_* functions consistently where appropriate. [Modified by the committer to update two calls to Perl_refcounted_he_fetch recently added to newPMOP.]
* function to parse Perl code blockZefram2010-10-211-0/+1
| | | | | New API function parse_block() parses a code block, including surrounding braces. The block is a lexical scope, but not inherently a dynamic scope.
* add lex_start to the APIZefram2010-10-211-2/+1
| | | | | lex_start() is added to the API, marked experimental, and documented. It also gains a flags parameter for foreseeable future use.
* remove redundant lex_endZefram2010-10-211-2/+0
| | | | | | | The lex_end() function is redundant, because the lexer context object is actually finalised by parser_free(), triggered by the save stack. The lex_end() function has historically been empty, except when the PL_doextract global was being misused to store lexer state.
* remove filter inheritance option from lex_startZefram2010-10-211-1/+1
| | | | | | | | The only uses of lex_start that had the new_filter parameter false, to make the new lexer context share source filters with the previous lexer context, were uses with rsfp null, which therefore never invoked source filters. Inheriting source filters from a logically unrelated file seems like a silly idea anyway.
* embed.pl -> regen/embed.plFather Chrysostomos2010-10-131-2/+2
| | | | so newcomers can find it more easily
* [perl #78362] Make mro_package_moved check for recursionFather Chrysostomos2010-10-121-1/+1
| | | | | The existence of main::main::... caused mro_package_moved to break Text::Template, and probably Acme::Meta as well.
* Add LINKLIST to the API.Ben Morrow2010-10-121-1/+1
| | | | | Also rename the underlying function to op_linklist, to match the other API op functions.
* APIify op list constructorsZefram2010-10-121-6/+3
| | | | | | Put into the API op_append_elem, op_prepend_elem, and op_append_list. All renamed from op_-less internal names. Parameter types for op_append_list changed to match the rest of the op API and avoid some casting.
* Reset isa caches on nonexistent substashes when stash trees are movedFather Chrysostomos2010-10-121-1/+1
| | | | | | | | | | | | | | | | | This fixes the problem of isa cache linearisations’ and method caches’ not being reset on nonexistent packages when they are replaced with real packages as a result of parent stashes’ being moved. This can happen in cases like this: @left::ISA = 'outer::inner'; @right::ISA = 'clone::inner'; {package outer::inner} *clone:: = \%outer::; print "ok 1", "\n" if left->isa("clone::inner"); print "ok 2", "\n" if right->isa("outer::inner"); This changes mro_package_moved’s parameter list as documented in the diff for mro.c. See also the new comments in that function.
* Allow mro_isa_changed_in to be called on nonexistent packagesFather Chrysostomos2010-10-111-1/+2
| | | | | | | | | | | | | | | | | This is necessary for an upcoming bug fix. (For this bug: @left::ISA = 'outer::inner'; @right::ISA = 'clone::inner'; *clone:: = \%outer::; print left->isa('clone::inner'),"\n"; print right->isa('outer::inner'),"\n"; ) This commit actually replaces mro_isa_changed_in with mro_isa_changed_in3. See the docs for it in the diff for mro.c.
* plugin mechanism to rewrite calls to a subroutineZefram2010-10-101-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | New magic type PERL_MAGIC_checkcall attaches a function to a CV, which will be called as the second half of the op checker for an entersub op calling that CV. Default state, in the absence of this magic, is to process the CV's prototype if it has one, or apply list context to all the arguments if not. New API functions cv_get_call_checker() and cv_set_call_checker() provide a clean interface to this facility, hiding the internal use of magic. Expose in the API the new functions rv2cv_op_cv(), ck_entersub_args_list(), ck_entersub_args_proto(), and ck_entersub_args_proto_or_list(), which are meaningful segments of standard entersub op checking and are likely to be useful in plugged-in call checker functions. Expose new API function op_contextualize(), which is a public interface to the internal scalar()/list()/scalarvoid() functions. This API is likely to be required in most plugged-in call checker functions. Incidentally add new function mg_free_type(), in the API, which will remove magic of one type from an SV. (mg_free() removes all magic, and there isn't anything else more selective.)
* make sv_clear() iterate over AVsDavid Mitchell2010-10-111-1/+1
| | | | | | | | | | | | | In sv_clear(), rather than calling av_undef(), iterate over the AV's elements. This is the first stage in making sv_clear() non-recursive, and thus non-stack-blowing when freeing deeply nested structures. Since we no longer have the stack to maintain the chain of AVs currently being iterated over, we instead store a pointer to the previous AV in the AvARRAY[AvMAX] slot of the currently-being-iterated AV. Since our first action is to pop the first SV, that slot is guaranteed to be free, and (in theory) nothing should be messing with the AV while we iterate over its elements, so that slot should remain undisturbed.
* Reset isa on stash manipulationFather Chrysostomos2010-10-091-0/+1
| | | | | | | | | | | | This only applies to glob-to-glob assignments and deletions of stash elements. Other types of stash manipulation are dealt with by subse- quent patches. It adds mro_package_moved, a private function that iterates through subpackages, calling mro_isa_changed_in on each. This is related to [perl #75176], but is not the same bug. It simply got in the way of fixing [perl #75176].
* Create populate_isa() to de-duplicate logic to populate @ISA.Nicholas Clark2010-10-091-0/+4
| | | | | | | Previously yylex() was conditionally populating @AnyDBM_File::ISA (if it was not set, and the token dbmopen was seen), and init_predump_symbols() was populating @IO::File::ISA (unconditionally, but this is so early that nothing previously could have set it). This refactoring eliminates code duplication.
* Remove now-unused parameters from S_gv_magicalize_isa().Nicholas Clark2010-10-091-1/+1
| | | | 997daa56862a0fc7 eliminated the need for passing these in.
* Convert the implementation of XS_APIVERSION_BOOTCHECK to a function.Nicholas Clark2010-10-081-0/+4
| | | | | | The previous macro generated over .5K of object code. This is in every shared object, and is only called once. Hence this change increases the perl binary by about .5K (once), to save .5K for every XS module loaded.
* xs_version_bootcheck() is an implementation detail, rather than a public API.Nicholas Clark2010-10-081-1/+3
| | | | XS_VERSION_BOOTCHECK() is the public API.
* Change vverify() to return HV or NULL (RT#78286)David Golden2010-10-081-1/+1
| | | | | | | | | | Multiple code paths were dereferencing version objects without checking the underlying type, which could result in segmentation faults per RT#78286 This patch consolidates all dereferencing into vverify() and has vverify return the underlying HV or NULL instead of a boolean value.
* Convert the implementation of XS_VERSION_BOOTCHECK to a function from a macro.Nicholas Clark2010-10-071-0/+3
| | | | | | The macro expansion generates over 1K of object code. This is in every shared object, and is only called once. Hence this change increases the perl binary by about 1K (once), to save 1K for every XS module loaded.
* [PATCH] function to parse Perl statement sequenceZefram2010-10-041-0/+1
| | | | | New API function parse_stmtseq() parses a sequence of statements, up to closing brace or EOF.
* add stray save_* functions to the APIZefram2010-10-041-4/+4
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* Change embed.fnc's vi modeline comment from /* */ to :Nicholas Clark2010-09-291-3/+1
| | | | This means that it isn't (needlessly) copied into proto.h
* Remove the {START,END}_EXTERN_C macros from within embed.fncNicholas Clark2010-09-291-8/+0
| | | | | | | These, and the "functions with flag 'n' should come before here" comments are holdouts from the long-gone PERL_OBJECT implementation. This doesn't change the linkage type of any externally visible functions under g++ - just some static functions. This follows on from 77d8c8d52bcb3950.
* systematically provide pv/pvn/pvs/sv quartetsZefram2010-09-281-0/+8
| | | | | Anywhere an API function takes a string in pvn form, ensure that there are corresponding pv, pvs, and sv APIs.
* Remove empty preprocessor directive in embed.fncAndy Dougherty2010-09-271-1/+0
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* Move OP prototypes from pp_proto.h to proto.hNicholas Clark2010-09-271-43/+0
| | | | | | | | | | | | Make embed.pl fully responsible for generating prototypes and embedding macros for pp_* and ck_* functions, placing them in embed.h and proto.h opcode.pl no longer generates pp_proto.h Remove the (effectively) duplicate explicit entries for (all but 2) ck_* functions from embed.fnc We can't actually remove pp_proto.h from the distribution *yet*, as ExtUtils::MM_Unix and ExtUtils::MM_VMS have hardcoded lists of the installed headers. Once this is resolved, we can.
* Move the generation of {START,END}_EXTERN_C from embed.fnc to embed.plNicholas Clark2010-09-271-3/+0
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* [perl #76814] FETCH called twice - !Father Chrysostomos2010-09-241-1/+2
| | | | | | This fixes ! by changing sv_2bool to sv_2bool_flags (with a macro wrapper) and adding SvTRUE_nomg. It also corrects the docs that state incorrectly that SvTRUE does not handle magic.
* [perl #76814] FETCH called twice - string comparison opsFather Chrysostomos2010-09-241-2/+6
| | | | | | This patch changes sv_eq, sv_cmp, sv_cmp_locale and sv_collxfrm to _flags forms, with macros under the old names for sv_eq and sv_collxfrm, but functions for sv_cmp* since pp_sort.c needs them.
* Extract regcurly as a static inline function.Andy Dougherty2010-09-221-1/+0
| | | | | | | This patch extracts regcurly from regcomp.c and converts it to a static inline function in a new file dquote_static.c that is now #included by regcomp.c and toke.c. This change will require 'make regen'.
* Programmatically generate the compatibility macros for "misnamed functions".Nicholas Clark2010-09-221-16/+22
| | | | | Add a new flag 'O' in embed.fnc to generate a macro mapping perl_$func() to $func(). The macro for call_atexit() is far too special to do this way.
* Silence compiler warningsSteve Hay2010-09-181-1/+1
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* Back out the mauve module and related changesFlorian Ragwitz2010-09-161-1/+0
| | | | | | | | | | | | | | | | | | | | | It's was intended as a temporary namespace only, and we really don't want to ship it in any release until we've figured out what it should really look like. This reverts commit 05c0d6bbe3ec5cc9af99d105b8648ad02ed7cc95, "add sv_reftype_len() and make sv_reftype() be a wrapper for it" commit 792477b9c2e4c75cb03d07bd6d25dc7e1fdf448e, "create the "mauve" temporary namespace for things like reftype" commit 8df6b97c1de8326d50ac9c8cae4bf716393b45bb, "mauve.t needs access to %Config, make sure it's available" commit cfe9162d0d593cd12a979c73df82c7509b324343, "use more efficient sv_reftype_len() interface" and commit 47b13905e23c2a72acdde8bb4669e25e5eaefec4 "add more tests to lib/mauve.t so it tests also that mauve::reftype can return "LVALUE"" There's a `mauve' branch still containing all the code for the temporary mauve namespace. That should be used to work on it until it's mostly ready to be released, and only then merged to blead. Alternatively, it should be deleted if another way to provide mauve's features in the core is found.
* add hv_copy_hints_hv and save_hints to the APIZefram2010-09-161-2/+2
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* Shorten external symbol name for VMSFlorian Ragwitz2010-09-111-1/+1
| | | | | | VMS seems to have a 31 character limitation for external symbols. To be able to fit into that, rename 'coerce_qwlist_to_paren_list' to 'munge_qwlist_to_paren_list'.
* Remove offer_nice_chunk(), PL_nice_chunk and PL_nice_chunk_size.Nicholas Clark2010-09-081-3/+0
| | | | | | | | | | | | | | | | | | These provided a non-public API for the hash and array code to donate free memory direct to the SV head allocation routines, instead of returning it to the malloc system with free(). I assume that on some older mallocs this could offer significant benefits. However, my benchmarking on a modern malloc couldn't detect any significant effect (positive or negative) on removing the code. Its (continued) presence, however, has downsides a: slightly more code complexity b: slightly larger interpreter structure c: in the steady state, if net creation of SVs is zero, 1 chunk of allocated but unused memory will exist (per thread) So I think it best to remove it.
* make qw(...) first-class syntaxZefram2010-09-081-0/+2
| | | | | | | | | | This makes a qw(...) list literal a distinct token type for the parser, where previously it was munged into a "(",THING,")" sequence. The change means that qw(...) can't accidentally supply parens to parts of the grammar that want real parens. Due to many bits of code taking advantage of that by "foreach my $x qw(...) {}", this patch also includes a hack to coerce qw(...) to the old-style parenthesised THING, emitting a deprecation warning along the way.
* Move magicalize_{isa,overload} out into functionsFlorian Ragwitz2010-09-081-0/+2
| | | | | This way c++ compilers like us again, as we don't do jumps that skip initialisations anymore.
* API functions for accessing the runtime hinthash.Ben Morrow2010-09-071-0/+7
| | | | | | | Add hinthash_fetch(sv|pv[ns]) as a replacement for refcounted_he_fetch, which is not API (and should not be). Also add caller_cx, as the correct XS equivalent to caller(). Lots of modules seem to have copies of this, so a proper API function will be more maintainable in future.
* function interface to parse Perl statementZefram2010-09-061-2/+5
| | | | | | | | | | | | | yyparse() becomes reentrant. The yacc stack and related resources are allocated in yyparse(), rather than in lex_start(), and they are localised to yyparse(), preserving their values from any outer parser. yyparse() now takes a parameter which determines which production it will parse at the top level. New API function parse_fullstmt() uses this facility to parse just a single statement. The top-level single-statement production that is used for this then messes with the parser's head so that the parsing stops without seeing EOF, and any lookahead token seen after the statement is pushed back to the lexer.
* Change the first argument of Perl_fetch_cop_label() to COP *Nicholas Clark2010-09-021-1/+1
| | | | | | | | | | From a suggestion from Ben Morrow. The first argument used to be struct refcounted_he *, which exposed an implementation detail - that the COP's labels are (now) stored in this way. Google Code Search and an unpacked CPAN both fail to find any users of this API, so the impact should be minimal.
* Refactor Perl_store_cop_label() to avoid exposing struct refcounted_he *.Nicholas Clark2010-09-011-2/+2
| | | | | | | Instead pass in a COP, as suggested by Ben Morrow. Also add length and flags parameters, and remove the comment suggesting this change. The underlying storage mechanism can honour length and UTF8/not, so there is no harm in exposing this one level higher.
* add sv_reftype_len() and make sv_reftype() be a wrapper for itYves Orton2010-08-301-0/+1
| | | | | | | | | sv_reftype() mostly returns strings whose length is known at compile time, so we can avoid a strlen() call if we return the length. Additionally, the non-length interface is potentially buggy in the face of class names which contain "\0", therefore providing a way to obtain the true length allows us to avoid any trickyness.
* make recursive part of peephole optimiser hookableZefram2010-08-261-1/+2
| | | | | | | | New variable PL_rpeepp makes it possible for extensions to hook the per-op-chain part of the peephole optimiser (which recurses into side chains). The existing variable PL_peepp still allows hooking the per-sub part of the peephole optimiser, maintaining perfect backward compatibility.
* Mark regcurly as experimentalkarl williamson (via RT)2010-08-251-1/+1
| | | | | | Even though it isn't in the public API, some worry that we shouldn't change it, as it's currently public, but may be made into an in-line function known only to the two .c files that should call it.
* document several optree construction functionsZefram2010-08-231-22/+22
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