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1 | # |
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2 | # This file is part of Deliantra, the Roguelike Realtime MMORPG. |
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3 | # |
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4 | # Copyright (©) 2009 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
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5 | # |
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6 | # Deliantra is free software: you can redistribute it and/or modify it under |
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7 | # the terms of the Affero GNU General Public License as published by the |
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8 | # Free Software Foundation, either version 3 of the License, or (at your |
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9 | # option) any later version. |
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10 | # |
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11 | # This program is distributed in the hope that it will be useful, |
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12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | # GNU General Public License for more details. |
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15 | # |
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16 | # You should have received a copy of the Affero GNU General Public License |
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17 | # and the GNU General Public License along with this program. If not, see |
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18 | # <http://www.gnu.org/licenses/>. |
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19 | # |
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20 | # The authors can be reached via e-mail to <support@deliantra.net> |
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21 | # |
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22 | |
1 | =head1 NAME |
23 | =head1 NAME |
2 | |
24 | |
3 | cf::match - object matching language |
25 | cf::match - object matching language |
4 | |
26 | |
5 | =head1 DESCRIPTION |
27 | =head1 DESCRIPTION |
… | |
… | |
66 | condition in inv of originator |
88 | condition in inv of originator |
67 | |
89 | |
68 | Once the final set of context objects has been established, each object |
90 | Once the final set of context objects has been established, each object |
69 | is matched against the C<condition>. |
91 | is matched against the C<condition>. |
70 | |
92 | |
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93 | It is possible to chain modifiers from right-to-left, so this example |
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94 | would start with the originator, take it's inventory, find all inventory |
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95 | items which are potions, looks into their inventory, and then finds all |
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96 | spells. |
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97 | |
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98 | type=SPELL in type=POTION in inv of originator |
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99 | |
71 | Sometimes the server is only interested in knowing whether I<anything> |
100 | Sometimes the server is only interested in knowing whether I<anything> |
72 | matches, and sometimes the server is interested in I<all> objects that |
101 | matches, and sometimes the server is interested in I<all> objects that |
73 | match. |
102 | match. |
74 | |
103 | |
75 | =head2 OPERATORS |
104 | =head2 OPERATORS |
… | |
… | |
77 | =over 4 |
106 | =over 4 |
78 | |
107 | |
79 | =item and, or, not, () |
108 | =item and, or, not, () |
80 | |
109 | |
81 | Conditions can be combined with C<and> or C<or> to build larger |
110 | Conditions can be combined with C<and> or C<or> to build larger |
82 | expressions. C<not> negates the expression, and parentheses can be used to |
111 | expressions. C<not> negates the condition, and parentheses can be used to |
83 | group conditions. |
112 | override operator precedence and execute submatches. |
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113 | |
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114 | Not that C<not> only negates a condition and not the whole match |
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115 | expressions, thus |
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116 | |
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117 | not applied in inv |
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118 | |
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119 | is true if there is I<any> non-applied object in the inventory. To negate |
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120 | a whole match, you have to use a sub-match: To check whether there is |
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121 | I<no> applied object in someones inventory, write this: |
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122 | |
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123 | not (applied in inv) |
84 | |
124 | |
85 | Example: match applied weapons. |
125 | Example: match applied weapons. |
86 | |
126 | |
87 | applied type=WEAPON |
127 | applied type=WEAPON |
88 | |
128 | |
89 | Example: match horns or rods. |
129 | Example: match horns or rods. |
90 | |
130 | |
91 | type=HORN or type=ROD |
131 | type=HORN or type=ROD |
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132 | |
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133 | Example: see if the originator is a player. |
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134 | |
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135 | type=PLAYER of originator |
92 | |
136 | |
93 | =item in ... |
137 | =item in ... |
94 | |
138 | |
95 | The in operator takes the context set and modifies it in various ways. As |
139 | The in operator takes the context set and modifies it in various ways. As |
96 | a less technical description, think of the C<in> as being a I<look into> |
140 | a less technical description, think of the C<in> as being a I<look into> |
… | |
… | |
118 | |
162 | |
119 | =item in map |
163 | =item in map |
120 | |
164 | |
121 | Replaces all objects by the objects that are on the same mapspace as them. |
165 | Replaces all objects by the objects that are on the same mapspace as them. |
122 | |
166 | |
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167 | =item in head |
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168 | |
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169 | Replaces all objects by their head objects. |
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170 | |
123 | =item in <condition> |
171 | =item in <condition> |
124 | |
172 | |
125 | Finds all context objects matching the condition, and then puts their |
173 | Finds all context objects matching the condition, and then puts their |
126 | inventories into the context set. |
174 | inventories into the context set. |
127 | |
175 | |
… | |
… | |
279 | =item any |
327 | =item any |
280 | |
328 | |
281 | This simply evaluates to true, and simply makes matching I<any> object a |
329 | This simply evaluates to true, and simply makes matching I<any> object a |
282 | bit easier to read. |
330 | bit easier to read. |
283 | |
331 | |
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332 | =item none |
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333 | |
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334 | This simply evaluates to false, and simply makes matching I<never> a bit |
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335 | easier to read. |
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336 | |
284 | =item has(condition) |
337 | =item has(condition) |
285 | |
338 | |
286 | True iff the object has a matching inventory object. |
339 | True iff the object has a matching inventory object. |
287 | |
340 | |
288 | =item count(match) |
341 | =item count(match) |
289 | |
342 | |
290 | Number of matching objects - the context object for the C<match> is the |
343 | Number of matching objects - the context object for the C<match> is the |
291 | currently tested object - you can override this with an C<in object> for |
344 | currently tested object - you can override this with an C<in object> for |
292 | example. |
345 | example. |
293 | |
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294 | =item match(match) |
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295 | |
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296 | An independent match - semantics like C<count>, except it only matters |
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297 | whether the match finds any object (which is faster). |
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298 | |
346 | |
299 | =item dump() |
347 | =item dump() |
300 | |
348 | |
301 | Dumps the object to the server log when executed, and evaluates to true. |
349 | Dumps the object to the server log when executed, and evaluates to true. |
302 | |
350 | |
… | |
… | |
317 | |
365 | |
318 | match = chain |
366 | match = chain |
319 | | chain 'of' root |
367 | | chain 'of' root |
320 | root = 'object' | 'self' | 'source' | 'originator' |
368 | root = 'object' | 'self' | 'source' | 'originator' |
321 | chain = condition |
369 | chain = condition |
322 | | chain also deep 'in' set |
370 | | chain also deep 'in' modifier |
323 | also = nothing | 'also' |
371 | also = nothing | 'also' |
324 | deep = nothing | 'deep' |
372 | deep = nothing | 'deep' |
325 | set = 'inv' | 'env' | 'arch' | 'map' |
373 | modifier ='inv' | 'env' | 'arch' | 'map' | 'head' |
326 | |
374 | |
327 | empty = |
375 | nothing = |
328 | |
376 | |
329 | # boolean matching condition |
377 | # boolean matching condition |
330 | |
378 | |
331 | condition = factor |
379 | condition = factor |
332 | | factor 'and'? condition |
380 | | factor 'and'? condition |
333 | | factor 'or' condition |
381 | | factor 'or' condition |
334 | |
382 | |
335 | factor = 'not' factor |
383 | factor = 'not' factor |
336 | | '(' condition ')' |
384 | | '(' match ')' |
337 | | expr |
385 | | expr |
338 | | expr operator constant |
386 | | expr operator constant |
339 | |
387 | |
340 | operator = '=' | '==' | '!=' | '<' | '<=' | '>' | '>=' |
388 | operator = '=' | '==' | '!=' | '<' | '<=' | '>' | '>=' |
341 | |
389 | |
342 | expr = flag |
390 | expr = flag |
343 | | sattr |
391 | | sattr |
344 | | aattr '[' <constant> ']' |
392 | | aattr '[' <constant> ']' |
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393 | | 'stat.' statattr |
345 | | special |
394 | | special |
346 | | func '(' args ')' |
395 | | func '(' args ')' |
347 | | '{' perl code block '}' |
396 | | '{' perl code block '}' |
348 | |
397 | |
349 | func = <any function name> |
398 | func = <any function name> |
350 | sattr = <any scalar object attribute> |
399 | sattr = <any scalar object attribute> |
351 | aattr = <any array object attribute> |
400 | aattr = <any array object attribute> |
352 | flag = <any object flag> |
401 | flag = <any object flag> |
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402 | statattr = <any stat attribute: exp, food, str, dex, hp, maxhp...> |
353 | special = <any ()-less "function"> |
403 | special = <any ()-less "function"> |
354 | |
404 | |
355 | constant = <number> | '"' <string> '"' | <uppercase cf::XXX name> |
405 | constant = <number> | '"' <string> '"' | <uppercase cf::XXX name> |
356 | args = <depends on function> |
406 | args = <depends on function> |
357 | |
407 | |
… | |
… | |
368 | package cf::match; |
418 | package cf::match; |
369 | |
419 | |
370 | use common::sense; |
420 | use common::sense; |
371 | |
421 | |
372 | use List::Util (); |
422 | use List::Util (); |
373 | |
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374 | # parser state |
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375 | # $_ # string to be parsed |
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376 | our $all; # find all, or just the first matching object |
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377 | |
423 | |
378 | { |
424 | { |
379 | package cf::match::exec; |
425 | package cf::match::exec; |
380 | |
426 | |
381 | use List::Util qw(first); |
427 | use List::Util qw(first); |
… | |
… | |
386 | |
432 | |
387 | sub ws { |
433 | sub ws { |
388 | /\G\s+/gc; |
434 | /\G\s+/gc; |
389 | } |
435 | } |
390 | |
436 | |
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437 | sub condition (); |
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438 | sub match ($$); |
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439 | |
391 | our %func = ( |
440 | our %func = ( |
392 | has => sub { |
441 | has => sub { |
393 | 'first { ' . &condition . ' } $_->inv' |
442 | 'first { ' . condition . ' } $_->inv' |
394 | }, |
443 | }, |
395 | count => sub { |
444 | count => sub { |
396 | local $all = 1; |
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397 | '(scalar ' . &match ('$_') . ')' |
445 | '(scalar ' . (match 1, '$_') . ')' |
398 | }, |
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399 | match => sub { |
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400 | local $all = 0; |
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401 | '(scalar ' . &match ('$_') . ')' |
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402 | }, |
446 | }, |
403 | dump => sub { |
447 | dump => sub { |
404 | 'do { |
448 | 'do { |
405 | warn "cf::match::match dump:\n" |
449 | warn "cf::match::match dump:\n" |
406 | . "self: " . eval { $self->name } . "\n" |
450 | . "self: " . eval { $self->name } . "\n" |
… | |
… | |
412 | |
456 | |
413 | our %special = ( |
457 | our %special = ( |
414 | any => sub { |
458 | any => sub { |
415 | 1 |
459 | 1 |
416 | }, |
460 | }, |
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461 | none => sub { |
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462 | 0 |
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463 | }, |
417 | ); |
464 | ); |
418 | |
465 | |
419 | sub constant { |
466 | sub constant { |
420 | ws; |
467 | ws; |
421 | |
468 | |
… | |
… | |
428 | die "number, string or uppercase constant name expected\n"; |
475 | die "number, string or uppercase constant name expected\n"; |
429 | } |
476 | } |
430 | |
477 | |
431 | our $flag = $cf::REFLECT{object}{flags}; |
478 | our $flag = $cf::REFLECT{object}{flags}; |
432 | our $sattr = $cf::REFLECT{object}{scalars}; |
479 | our $sattr = $cf::REFLECT{object}{scalars}; |
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480 | # quick hack to support archname, untested |
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481 | $sattr->{archname} = "W"; |
433 | our $aattr = $cf::REFLECT{object}{arrays}; |
482 | our $aattr = $cf::REFLECT{object}{arrays}; |
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483 | our $lattr = $cf::REFLECT{living}{scalars}; |
434 | |
484 | |
435 | sub expr { |
485 | sub expr { |
436 | # ws done by factor |
486 | # ws done by factor |
437 | my $res; |
487 | my $res; |
438 | |
488 | |
… | |
… | |
441 | |
491 | |
442 | my $expr = $1; |
492 | my $expr = $1; |
443 | |
493 | |
444 | $res .= $expr =~ /\{([^;]+)\}/ ? $1 : "do $expr"; |
494 | $res .= $expr =~ /\{([^;]+)\}/ ? $1 : "do $expr"; |
445 | |
495 | |
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496 | } elsif (/\Gstats\.([A-Za-z0-9_]+)/gc) { |
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497 | |
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498 | if (exists $lattr->{$1}) { |
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499 | $res .= "\$_->stats->$1"; |
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500 | } elsif (exists $lattr->{"\u$1"}) { |
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501 | $res .= "\$_->stats->\u$1"; |
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502 | } else { |
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503 | die "living statistic name expected (str, pow, hp, sp...)\n"; |
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504 | } |
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505 | |
446 | } elsif (/\G([A-Za-z0-9_]+)/gc) { |
506 | } elsif (/\G([A-Za-z0-9_]+)/gc) { |
447 | |
507 | |
448 | if (my $func = $func{$1}) { |
508 | if (my $func = $func{$1}) { |
449 | /\G\s*\(/gc |
509 | /\G\s*\(/gc |
450 | or die "'(' expected after function name\n"; |
510 | or die "'(' expected after function name\n"; |
… | |
… | |
478 | } else { |
538 | } else { |
479 | $res .= constant; |
539 | $res .= constant; |
480 | } |
540 | } |
481 | |
541 | |
482 | } else { |
542 | } else { |
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543 | Carp::cluck;#d# |
483 | die "expr expected\n"; |
544 | die "expr expected\n"; |
484 | } |
545 | } |
485 | |
546 | |
486 | $res |
547 | $res |
487 | } |
548 | } |
… | |
… | |
504 | $res .= "!"; |
565 | $res .= "!"; |
505 | } |
566 | } |
506 | |
567 | |
507 | if (/\G\(/gc) { |
568 | if (/\G\(/gc) { |
508 | # () |
569 | # () |
509 | $res .= &condition; |
570 | |
510 | ws; |
571 | $res .= '(' . (match 0, '$_') . ')'; |
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572 | |
511 | /\G\)/gc or die "')' expected\n"; |
573 | /\G\s*\)/gc or die "closing ')' expected\n"; |
512 | |
574 | |
513 | } else { |
575 | } else { |
514 | my $expr = expr; |
576 | my $expr = expr; |
515 | |
577 | |
516 | $res .= $expr; |
578 | $res .= $expr; |
… | |
… | |
527 | } |
589 | } |
528 | |
590 | |
529 | "($res)" |
591 | "($res)" |
530 | } |
592 | } |
531 | |
593 | |
532 | sub condition { |
594 | sub condition () { |
533 | my $res = factor; |
595 | my $res = factor; |
534 | |
596 | |
535 | while () { |
597 | while () { |
536 | ws; |
598 | ws; |
537 | |
599 | |
538 | # first check some stop-symbols, so we don't have to backtrack |
600 | # first check some stop-symbols, so we don't have to backtrack |
539 | if (/\G(?=also\b|deep\b|in\b|of\b\)|\z)/gc) { |
601 | if (/\G(?=also\b|deep\b|in\b|of\b|\)|\z)/gc) { |
540 | pos = pos; # argh. the misop hits again. again. again. again. you die. |
602 | pos = pos; # argh. the misop hits again. again. again. again. you die. |
541 | last; |
603 | last; |
542 | |
604 | |
543 | } elsif (/\Gor\b/gc) { |
605 | } elsif (/\Gor\b/gc) { |
544 | $res .= " || "; |
606 | $res .= " || "; |
… | |
… | |
551 | } |
613 | } |
552 | |
614 | |
553 | $res |
615 | $res |
554 | } |
616 | } |
555 | |
617 | |
556 | sub match { |
618 | sub match ($$) { |
557 | my $default = shift; |
619 | my ($wantarray, $defctx) = @_; |
558 | |
620 | |
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621 | my $res = condition; |
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622 | |
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623 | # if nothing follows, we have a simple condition, so |
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624 | # optimise a comon case. |
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625 | if ($defctx eq '$_' and /\G\s*(?=\)|$)/gc) { |
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626 | return $wantarray |
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627 | ? "$res ? \$_ : ()" |
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628 | : $res; |
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629 | } |
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630 | |
559 | my $res = ($all ? " grep { " : " first {") . condition . " }"; |
631 | $res = ($wantarray ? " grep { " : " first { ") . $res . "}"; |
560 | |
632 | |
561 | while () { |
633 | while () { |
562 | ws; |
634 | ws; |
563 | |
635 | |
564 | my $also = /\Galso\s+/gc + 0; |
636 | my $also = /\Galso\s+/gc + 0; |
565 | my $deep = /\Gdeep\s+/gc + 0; |
637 | my $deep = /\Gdeep\s+/gc + 0; |
566 | |
638 | |
567 | if (/\Gin\s+/gc) { |
639 | if (/\Gin\s+/gc) { |
568 | my $expand; |
640 | my $expand; |
569 | |
641 | |
570 | if (/\G(inv|env|map|arch)\b/gc) { |
642 | if (/\G(inv|env|map|arch|head)\b/gc) { |
571 | if ($1 eq "inv") { |
643 | if ($1 eq "inv") { |
572 | $expand = "map \$_->inv,"; |
644 | $expand = "map \$_->inv,"; |
573 | } elsif ($1 eq "env") { |
645 | } elsif ($1 eq "env") { |
574 | $expand = "map \$_->env // (),"; |
646 | $expand = "map \$_->env // (),"; |
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647 | } elsif ($1 eq "head") { |
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648 | $expand = "map \$_->head,"; |
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649 | $deep = 0; # infinite loop otherwise |
575 | } elsif ($1 eq "arch") { |
650 | } elsif ($1 eq "arch") { |
576 | $expand = "map \$_->arch,"; |
651 | $expand = "map \$_->arch,"; |
577 | $deep = 0; # infinite loop otherwise |
652 | $deep = 0; # infinite loop otherwise |
578 | } elsif ($1 eq "map") { |
653 | } elsif ($1 eq "map") { |
579 | $expand = "map \$_->map->at (\$_->x, \$_->y),"; |
654 | $expand = "map \$_->map->at (\$_->x, \$_->y),"; |
… | |
… | |
593 | $res .= " (\@res, \@_)\n" |
668 | $res .= " (\@res, \@_)\n" |
594 | . "}"; |
669 | . "}"; |
595 | } else { |
670 | } else { |
596 | $res .= " $expand"; |
671 | $res .= " $expand"; |
597 | } |
672 | } |
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673 | } else { |
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674 | |
598 | } elsif (/\Gof\s+(self|object|source|originator)\b/gc) { |
675 | if (/\Gof\s+(self|object|source|originator)\b/gc) { |
599 | $also || $deep |
676 | $also || $deep |
600 | and die "neither 'also' nor 'deep' can be used with 'of'\n"; |
677 | and die "neither 'also' nor 'deep' can be used with 'of'\n"; |
601 | |
678 | |
602 | if ($1 eq "self") { |
679 | if ($1 eq "self") { |
603 | return "$res \$self // ()"; |
680 | return "$res \$self // ()"; |
604 | } elsif ($1 eq "object") { |
681 | } elsif ($1 eq "object") { |
605 | return "$res \$object"; |
682 | return "$res \$object"; |
606 | } elsif ($1 eq "source") { |
683 | } elsif ($1 eq "source") { |
607 | return "$res \$source // ()"; |
684 | return "$res \$source // ()"; |
608 | } elsif ($1 eq "originator") { |
685 | } elsif ($1 eq "originator") { |
609 | return "$res \$originator // \$source // ()"; |
686 | return "$res \$originator // \$source // ()"; |
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687 | } |
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688 | } else { |
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689 | return "$res $defctx"; |
610 | } |
690 | } |
611 | } else { |
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612 | return "$res $default"; |
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613 | } |
691 | } |
614 | } |
692 | } |
615 | } |
693 | } |
616 | } |
694 | } |
617 | |
695 | |
618 | sub parse($;$) { |
696 | sub parse($$) { # wantarray, matchexpr |
619 | local $_ = shift; |
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620 | local $all = shift; |
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621 | |
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622 | my $res; |
697 | my $res; |
623 | |
698 | |
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699 | local $_ = $_[1]; |
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700 | |
624 | eval { |
701 | eval { |
625 | $res = cf::match::parser::match "\$object"; |
702 | $res = cf::match::parser::match $_[0], "\$object"; |
626 | |
703 | |
627 | /\G$/gc |
704 | /\G$/gc |
628 | or die "unexpected trailing characters after match\n"; |
705 | or die "unexpected trailing characters after match\n"; |
629 | }; |
706 | }; |
630 | |
707 | |
… | |
… | |
639 | |
716 | |
640 | $res |
717 | $res |
641 | } |
718 | } |
642 | |
719 | |
643 | if (0) {#d# |
720 | if (0) {#d# |
644 | die parse 'type=SPELL_EFFECT and match(name="bullet" in arch)', 1; |
721 | die parse 1, 'stats.pow'; |
645 | exit 0; |
722 | exit 0; |
646 | } |
723 | } |
647 | |
724 | |
648 | =item cf::match::match $match, $object[, $self[, $source[, $originator]]] |
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649 | |
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650 | Compiles (and caches) the C<$match> expression and matches it against |
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651 | the C<$object>. C<$self> should be the object initiating the match (or |
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652 | C<undef>), C<$source> should be the actor/source and C<$originator> the |
|
|
653 | object that initiated the action (such as the player). C<$originator> |
|
|
654 | defaults to C<$source> when not given. |
|
|
655 | |
|
|
656 | In list context it finds and returns all matching objects, in scalar |
|
|
657 | context only a true or false value. |
|
|
658 | |
|
|
659 | =cut |
|
|
660 | |
|
|
661 | our %CACHE; |
725 | our %CACHE; |
662 | |
726 | |
663 | sub compile($$) { |
727 | sub compile($$) { |
664 | my ($match, $all) = @_; |
728 | my ($wantarray, $match) = @_; |
665 | my $expr = parse $match, $all; |
729 | my $expr = parse $wantarray, $match; |
666 | warn "MATCH DEBUG $match,$all => $expr\n";#d# |
730 | warn "MATCH DEBUG $match,$wantarray => $expr\n";#d# |
667 | $expr = eval " |
731 | $expr = eval " |
668 | package cf::match::exec; |
732 | package cf::match::exec; |
669 | sub { |
733 | sub { |
670 | my (\$object, \$self, \$source, \$originator) = \@_; |
734 | my (\$object, \$self, \$source, \$originator) = \@_; |
671 | $expr |
735 | $expr |
… | |
… | |
674 | die if $@; |
738 | die if $@; |
675 | |
739 | |
676 | $expr |
740 | $expr |
677 | } |
741 | } |
678 | |
742 | |
|
|
743 | =item cf::match::match $match, $object[, $self[, $source[, $originator]]] |
|
|
744 | |
|
|
745 | Compiles (and caches) the C<$match> expression and matches it against |
|
|
746 | the C<$object>. C<$self> should be the object initiating the match (or |
|
|
747 | C<undef>), C<$source> should be the actor/source and C<$originator> the |
|
|
748 | object that initiated the action (such as the player). C<$originator> |
|
|
749 | defaults to C<$source> when not given. |
|
|
750 | |
|
|
751 | In list context it finds and returns all matching objects, in scalar |
|
|
752 | context only a true or false value. |
|
|
753 | |
|
|
754 | =cut |
|
|
755 | |
679 | sub match($$;$$$) { |
756 | sub match($$;$$$) { |
680 | my $match = shift; |
757 | my $match = shift; |
681 | my $all = wantarray+0; |
758 | my $wantarray = wantarray+0; |
682 | |
759 | |
683 | &{ |
760 | &{ |
684 | $CACHE{"$all$match"} ||= compile $match, $all |
761 | $CACHE{"$wantarray$match"} ||= compile $wantarray, $match |
685 | } |
762 | } |
686 | } |
763 | } |
687 | |
764 | |
|
|
765 | our $CACHE_CLEARER = AE::timer 3600, 3600, sub { |
|
|
766 | %CACHE = (); |
|
|
767 | }; |
|
|
768 | |
688 | #d# $::schmorp=cf::player::find "schmorp"& |
769 | #d# $::schmorp=cf::player::find "schmorp"& |
689 | #d# cf::match::match '', $::schmorp->ob |
770 | #d# cf::match::match '', $::schmorp->ob |
690 | |
771 | |
691 | |
772 | |
692 | =back |
773 | =back |