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1 | package SQL::Translator::Parser::PostgreSQL; |
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2 | |
3 | # ------------------------------------------------------------------- |
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4 | # $Id: PostgreSQL.pm,v 1.13 2003-05-03 04:09:50 kycl4rk Exp $ |
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5 | # ------------------------------------------------------------------- |
6 | # Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org>, |
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7 | # Allen Day <allenday@users.sourceforge.net>, |
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8 | # darren chamberlain <darren@cpan.org>, |
9 | # Chris Mungall <cjm@fruitfly.org> |
10 | # |
11 | # This program is free software; you can redistribute it and/or |
12 | # modify it under the terms of the GNU General Public License as |
13 | # published by the Free Software Foundation; version 2. |
14 | # |
15 | # This program is distributed in the hope that it will be useful, but |
16 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
18 | # General Public License for more details. |
19 | # |
20 | # You should have received a copy of the GNU General Public License |
21 | # along with this program; if not, write to the Free Software |
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22 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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23 | # 02111-1307 USA |
24 | # ------------------------------------------------------------------- |
25 | |
26 | =head1 NAME |
27 | |
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28 | SQL::Translator::Parser::PostgreSQL - parser for PostgreSQL |
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29 | |
30 | =head1 SYNOPSIS |
31 | |
32 | use SQL::Translator; |
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33 | use SQL::Translator::Parser::PostgreSQL; |
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34 | |
35 | my $translator = SQL::Translator->new; |
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36 | $translator->parser("SQL::Translator::Parser::PostgreSQL"); |
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37 | |
38 | =head1 DESCRIPTION |
39 | |
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40 | The grammar was started from the MySQL parsers. Here is the description |
41 | from PostgreSQL: |
42 | |
43 | Table: |
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44 | (http://www.postgresql.org/docs/view.php?version=7.3&idoc=1&file=sql-createtable.html) |
45 | |
46 | CREATE [ [ LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name ( |
47 | { column_name data_type [ DEFAULT default_expr ] |
48 | [ column_constraint [, ... ] ] |
49 | | table_constraint } [, ... ] |
50 | ) |
51 | [ INHERITS ( parent_table [, ... ] ) ] |
52 | [ WITH OIDS | WITHOUT OIDS ] |
53 | |
54 | where column_constraint is: |
55 | |
56 | [ CONSTRAINT constraint_name ] |
57 | { NOT NULL | NULL | UNIQUE | PRIMARY KEY | |
58 | CHECK (expression) | |
59 | REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL ] |
60 | [ ON DELETE action ] [ ON UPDATE action ] } |
61 | [ DEFERRABLE | NOT DEFERRABLE ] |
62 | [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] |
63 | |
64 | and table_constraint is: |
65 | |
66 | [ CONSTRAINT constraint_name ] |
67 | { UNIQUE ( column_name [, ... ] ) | |
68 | PRIMARY KEY ( column_name [, ... ] ) | |
69 | CHECK ( expression ) | |
70 | FOREIGN KEY ( column_name [, ... ] ) |
71 | REFERENCES reftable [ ( refcolumn [, ... ] ) ] |
72 | [ MATCH FULL | MATCH PARTIAL ] |
73 | [ ON DELETE action ] [ ON UPDATE action ] } |
74 | [ DEFERRABLE | NOT DEFERRABLE ] |
75 | [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] |
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76 | |
77 | Index: |
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78 | (http://www.postgresql.org/docs/view.php?version=7.3&idoc=1&file=sql-createindex.html) |
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79 | |
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80 | CREATE [ UNIQUE ] INDEX index_name ON table |
81 | [ USING acc_method ] ( column [ ops_name ] [, ...] ) |
82 | [ WHERE predicate ] |
83 | CREATE [ UNIQUE ] INDEX index_name ON table |
84 | [ USING acc_method ] ( func_name( column [, ... ]) [ ops_name ] ) |
85 | [ WHERE predicate ] |
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86 | |
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87 | Alter table: |
88 | |
89 | ALTER TABLE [ ONLY ] table [ * ] |
90 | ADD [ COLUMN ] column type [ column_constraint [ ... ] ] |
91 | ALTER TABLE [ ONLY ] table [ * ] |
92 | ALTER [ COLUMN ] column { SET DEFAULT value | DROP DEFAULT } |
93 | ALTER TABLE [ ONLY ] table [ * ] |
94 | ALTER [ COLUMN ] column SET STATISTICS integer |
95 | ALTER TABLE [ ONLY ] table [ * ] |
96 | RENAME [ COLUMN ] column TO newcolumn |
97 | ALTER TABLE table |
98 | RENAME TO new_table |
99 | ALTER TABLE table |
100 | ADD table_constraint_definition |
101 | ALTER TABLE [ ONLY ] table |
102 | DROP CONSTRAINT constraint { RESTRICT | CASCADE } |
103 | ALTER TABLE table |
104 | OWNER TO new_owner |
105 | |
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106 | View table: |
107 | |
108 | CREATE [ OR REPLACE ] VIEW view [ ( column name list ) ] AS SELECT query |
109 | |
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110 | =cut |
111 | |
112 | use strict; |
113 | use vars qw[ $DEBUG $VERSION $GRAMMAR @EXPORT_OK ]; |
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114 | $VERSION = sprintf "%d.%02d", q$Revision: 1.13 $ =~ /(\d+)\.(\d+)/; |
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115 | $DEBUG = 0 unless defined $DEBUG; |
116 | |
117 | use Data::Dumper; |
118 | use Parse::RecDescent; |
119 | use Exporter; |
120 | use base qw(Exporter); |
121 | |
122 | @EXPORT_OK = qw(parse); |
123 | |
124 | # Enable warnings within the Parse::RecDescent module. |
125 | $::RD_ERRORS = 1; # Make sure the parser dies when it encounters an error |
126 | $::RD_WARN = 1; # Enable warnings. This will warn on unused rules &c. |
127 | $::RD_HINT = 1; # Give out hints to help fix problems. |
128 | |
129 | my $parser; # should we do this? There's no programmic way to |
130 | # change the grammar, so I think this is safe. |
131 | |
132 | $GRAMMAR = q! |
133 | |
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134 | { our ( %tables, $table_order ) } |
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135 | |
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136 | # |
137 | # The "eofile" rule makes the parser fail if any "statement" rule |
138 | # fails. Otherwise, the first successful match by a "statement" |
139 | # won't cause the failure needed to know that the parse, as a whole, |
140 | # failed. -ky |
141 | # |
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142 | startrule : statement(s) eofile { \%tables } |
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143 | |
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144 | eofile : /^\Z/ |
145 | |
146 | statement : create |
147 | | comment |
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148 | | alter |
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149 | | grant |
150 | | revoke |
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151 | | drop |
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152 | | connect |
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153 | | set |
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154 | | <error> |
155 | |
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156 | connect : /^\s*\\\connect.*\n/ |
157 | |
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158 | set : /SET/ /[^;]*/ ';' |
159 | |
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160 | revoke : /revoke/i WORD(s /,/) /on/i table_name /from/i name_with_opt_quotes(s /,/) ';' |
161 | { |
162 | my $table_name = $item{'table_name'}; |
163 | push @{ $tables{ $table_name }{'permissions'} }, { |
164 | type => 'revoke', |
165 | actions => $item[2], |
166 | users => $item[6], |
167 | } |
168 | } |
169 | |
170 | grant : /grant/i WORD(s /,/) /on/i table_name /to/i name_with_opt_quotes(s /,/) ';' |
171 | { |
172 | my $table_name = $item{'table_name'}; |
173 | push @{ $tables{ $table_name }{'permissions'} }, { |
174 | type => 'grant', |
175 | actions => $item[2], |
176 | users => $item[6], |
177 | } |
178 | } |
179 | |
180 | drop : /drop/i /[^;]*/ ';' |
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181 | |
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182 | # |
183 | # Create table. |
184 | # |
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185 | create : create_table table_name '(' create_definition(s /,/) ')' table_option(s?) ';' |
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186 | { |
187 | my $table_name = $item{'table_name'}; |
188 | $tables{ $table_name }{'order'} = ++$table_order; |
189 | $tables{ $table_name }{'table_name'} = $table_name; |
190 | |
191 | my $i = 1; |
192 | my @constraints; |
193 | for my $definition ( @{ $item[4] } ) { |
194 | if ( $definition->{'type'} eq 'field' ) { |
195 | my $field_name = $definition->{'name'}; |
196 | $tables{ $table_name }{'fields'}{ $field_name } = |
197 | { %$definition, order => $i }; |
198 | $i++; |
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199 | |
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200 | for my $constraint ( @{ $definition->{'constraints'} || [] } ) { |
201 | $constraint->{'fields'} = [ $field_name ]; |
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202 | push @{ $tables{ $table_name }{'constraints'} }, |
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203 | $constraint; |
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204 | } |
205 | } |
206 | elsif ( $definition->{'type'} eq 'constraint' ) { |
207 | $definition->{'type'} = $definition->{'constraint_type'}; |
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208 | # group FKs at the field level |
209 | if ( $definition->{'type'} eq 'foreign_key' ) { |
210 | for my $fld ( @{ $definition->{'fields'} || [] } ) { |
211 | push @{ |
212 | $tables{$table_name}{'fields'}{$fld}{'constraints'} |
213 | }, $definition; |
214 | } |
215 | } |
216 | else { |
217 | push @{ $tables{ $table_name }{'constraints'} }, |
218 | $definition; |
219 | } |
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220 | } |
221 | else { |
222 | push @{ $tables{ $table_name }{'indices'} }, $definition; |
223 | } |
224 | } |
225 | |
226 | for my $option ( @{ $item[6] } ) { |
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227 | $tables{ $table_name }{'table_options(s?)'}{ $option->{'type'} } = |
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228 | $option; |
229 | } |
230 | |
231 | 1; |
232 | } |
233 | |
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234 | # |
235 | # Create index. |
236 | # |
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237 | create : /create/i unique(?) /(index|key)/i index_name /on/i table_name using_method(?) '(' field_name(s /,/) ')' where_predicate(?) ';' |
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238 | { |
239 | push @{ $tables{ $item{'table_name'} }{'indices'} }, |
240 | { |
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241 | name => $item{'index_name'}, |
242 | type => $item{'unique'}[0] ? 'unique' : 'normal', |
243 | fields => $item[9], |
244 | method => $item{'using_method'}[0], |
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245 | } |
246 | ; |
247 | } |
248 | |
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249 | # |
250 | # Create anything else (e.g., domain, function, etc.) |
251 | # |
252 | create : /create/i WORD /[^;]+/ ';' |
253 | |
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254 | using_method : /using/i WORD { $item[2] } |
255 | |
256 | where_predicate : /where/i /[^;]+/ |
257 | |
258 | create_definition : field |
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259 | | table_constraint |
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260 | | <error> |
261 | |
262 | comment : /^\s*(?:#|-{2}).*\n/ |
263 | |
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264 | field : comment(s?) field_name data_type field_meta(s?) comment(s?) |
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265 | { |
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266 | my ( $default, @constraints, $is_pk ); |
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267 | for my $meta ( @{ $item[4] } ) { |
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268 | $default = $meta if $meta->{'meta_type'} eq 'default'; |
269 | push @constraints, $meta if $meta->{'meta_type'} eq 'constraint'; |
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270 | $is_pk = $meta->{'type'} eq 'primary_key'; |
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271 | } |
272 | |
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273 | my $null = ( grep { $_->{'type'} eq 'not_null' } @constraints ) ? 0 : 1; |
274 | |
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275 | my @comments = ( @{ $item[1] }, @{ $item[5] } ); |
276 | |
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277 | $return = { |
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278 | type => 'field', |
279 | name => $item{'field_name'}, |
280 | data_type => $item{'data_type'}{'type'}, |
281 | size => $item{'data_type'}{'size'}, |
282 | list => $item{'data_type'}{'list'}, |
283 | null => $null, |
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284 | default => $default->{'value'}, |
285 | constraints => [ @constraints ], |
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286 | comments => [ @comments ], |
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287 | is_primary_key => $is_pk || 0, |
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288 | } |
289 | } |
290 | | <error> |
291 | |
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292 | field_meta : default_val |
293 | | |
294 | column_constraint |
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295 | |
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296 | column_constraint : constraint_name(?) column_constraint_type deferrable(?) deferred(?) |
297 | { |
298 | my $desc = $item{'column_constraint_type'}; |
299 | my $type = $desc->{'type'}; |
300 | my $fields = $desc->{'fields'} || []; |
301 | my $expression = $desc->{'expression'} || ''; |
302 | |
303 | $return = { |
304 | meta_type => 'constraint', |
305 | name => $item{'constraint_name'}[0] || '', |
306 | type => $type, |
307 | expression => $type eq 'check' ? $expression : '', |
308 | deferreable => $item{'deferrable'}, |
309 | deferred => $item{'deferred'}, |
310 | reference_table => $desc->{'reference_table'}, |
311 | reference_fields => $desc->{'reference_fields'}, |
312 | match_type => $desc->{'match_type'}, |
313 | on_delete_do => $desc->{'on_delete_do'}, |
314 | on_update_do => $desc->{'on_update_do'}, |
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315 | } |
316 | } |
317 | |
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318 | constraint_name : /constraint/i name_with_opt_quotes { $item[2] } |
319 | |
320 | column_constraint_type : /not null/i { $return = { type => 'not_null' } } |
321 | | |
322 | /null/ |
323 | { $return = { type => 'null' } } |
324 | | |
325 | /unique/ |
326 | { $return = { type => 'unique' } } |
327 | | |
328 | /primary key/i |
329 | { $return = { type => 'primary_key' } } |
330 | | |
331 | /check/i '(' /[^)]+/ ')' |
332 | { $return = { type => 'check', expression => $item[2] } } |
333 | | |
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334 | /references/i table_name parens_word_list(?) match_type(?) key_action(s?) |
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335 | { |
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336 | my ( $on_delete, $on_update ); |
337 | for my $action ( @{ $item[5] || [] } ) { |
338 | $on_delete = $action->{'action'} if $action->{'type'} eq 'delete'; |
339 | $on_update = $action->{'action'} if $action->{'type'} eq 'update'; |
340 | } |
341 | |
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342 | $return = { |
343 | type => 'foreign_key', |
344 | reference_table => $item[2], |
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345 | reference_fields => $item[3][0], |
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346 | match_type => $item[4][0], |
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347 | on_delete_do => $on_delete, |
348 | on_update_do => $on_update, |
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349 | } |
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350 | } |
351 | |
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352 | table_name : name_with_opt_quotes |
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353 | |
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354 | field_name : name_with_opt_quotes |
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355 | |
0012a163 |
356 | name_with_opt_quotes : double_quote(?) NAME double_quote(?) { $item[2] } |
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357 | |
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358 | double_quote: /"/ |
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359 | |
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360 | index_name : WORD |
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361 | |
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362 | data_type : pg_data_type parens_value_list(?) |
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363 | { |
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364 | my $data_type = $item[1]; |
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365 | |
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366 | # |
367 | # We can deduce some sizes from the data type's name. |
368 | # |
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369 | $data_type->{'size'} ||= $item[2][0]; |
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370 | |
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371 | $return = $data_type; |
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372 | } |
373 | |
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374 | pg_data_type : |
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375 | /(bigint|int8|bigserial|serial8)/ |
376 | { |
377 | $return = { |
378 | type => 'integer', |
379 | size => 8, |
380 | auto_increment => 1, |
381 | }; |
382 | } |
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383 | | |
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384 | /(smallint|int2)/ |
385 | { |
386 | $return = { |
387 | type => 'integer', |
388 | size => 2, |
389 | }; |
390 | } |
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391 | | |
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392 | /int(eger)?|int4/ |
393 | { |
394 | $return = { |
395 | type => 'integer', |
396 | size => 4, |
397 | }; |
398 | } |
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399 | | |
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400 | /(double precision|float8?)/ |
401 | { |
402 | $return = { |
403 | type => 'float', |
404 | size => 8, |
405 | }; |
406 | } |
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407 | | |
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408 | /(real|float4)/ |
409 | { |
410 | $return = { |
411 | type => 'real', |
412 | size => 4, |
413 | }; |
414 | } |
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415 | | |
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416 | /serial4?/ |
417 | { |
418 | $return = { |
419 | type => 'integer', |
420 | size => 4, |
421 | auto_increment => 1, |
422 | }; |
423 | } |
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424 | | |
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425 | /bigserial/ |
426 | { |
427 | $return = { |
428 | type => 'integer', |
429 | size => 8, |
430 | auto_increment => 1, |
431 | }; |
432 | } |
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433 | | |
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434 | /(bit varying|varbit)/ |
435 | { |
436 | $return = { type => 'varbit' }; |
437 | } |
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438 | | |
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439 | /character varying/ |
440 | { |
441 | $return = { type => 'varchar' }; |
442 | } |
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443 | | |
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444 | /char(acter)?/ |
445 | { |
446 | $return = { type => 'char' }; |
447 | } |
0efb6e1b |
448 | | |
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449 | /bool(ean)?/ |
450 | { |
451 | $return = { type => 'boolean' }; |
452 | } |
0efb6e1b |
453 | | |
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454 | /(bytea|binary data)/ |
455 | { |
456 | $return = { type => 'binary' }; |
457 | } |
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458 | | |
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459 | /timestampz?/ |
460 | { |
461 | $return = { type => 'timestamp' }; |
462 | } |
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463 | | |
464 | /(bit|box|cidr|circle|date|inet|interval|line|lseg|macaddr|money|numeric|decimal|path|point|polygon|text|time|varchar)/ |
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465 | { |
466 | $return = { type => $item[1] }; |
467 | } |
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468 | |
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469 | parens_value_list : '(' VALUE(s /,/) ')' |
470 | { $item[2] } |
471 | |
0efb6e1b |
472 | parens_word_list : '(' WORD(s /,/) ')' |
473 | { $item[2] } |
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474 | |
0efb6e1b |
475 | field_size : '(' num_range ')' { $item{'num_range'} } |
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476 | |
0efb6e1b |
477 | num_range : DIGITS ',' DIGITS |
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478 | { $return = $item[1].','.$item[3] } |
479 | | DIGITS |
480 | { $return = $item[1] } |
481 | |
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482 | table_constraint : comment(s?) constraint_name(?) table_constraint_type deferrable(?) deferred(?) comment(s?) |
0efb6e1b |
483 | { |
484 | my $desc = $item{'table_constraint_type'}; |
485 | my $type = $desc->{'type'}; |
486 | my $fields = $desc->{'fields'}; |
487 | my $expression = $desc->{'expression'}; |
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488 | my @comments = ( @{ $item[1] }, @{ $item[-1] } ); |
0efb6e1b |
489 | |
490 | $return = { |
491 | name => $item{'constraint_name'}[0] || '', |
492 | type => 'constraint', |
493 | constraint_type => $type, |
494 | fields => $type ne 'check' ? $fields : [], |
495 | expression => $type eq 'check' ? $expression : '', |
496 | deferreable => $item{'deferrable'}, |
497 | deferred => $item{'deferred'}, |
498 | reference_table => $desc->{'reference_table'}, |
499 | reference_fields => $desc->{'reference_fields'}, |
500 | match_type => $desc->{'match_type'}[0], |
0012a163 |
501 | on_delete_do => $desc->{'on_delete_do'}, |
502 | on_update_do => $desc->{'on_update_do'}, |
f2f71b8e |
503 | comments => [ @comments ], |
0efb6e1b |
504 | } |
505 | } |
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506 | |
0efb6e1b |
507 | table_constraint_type : /primary key/i '(' name_with_opt_quotes(s /,/) ')' |
508 | { |
509 | $return = { |
510 | type => 'primary_key', |
511 | fields => $item[3], |
512 | } |
513 | } |
514 | | |
515 | /unique/i '(' name_with_opt_quotes(s /,/) ')' |
516 | { |
517 | $return = { |
518 | type => 'unique', |
519 | fields => $item[3], |
520 | } |
521 | } |
522 | | |
523 | /check/ '(' /(.+)/ ')' |
524 | { |
525 | $return = { |
526 | type => 'check', |
527 | expression => $item[3], |
528 | } |
529 | } |
530 | | |
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531 | /foreign key/i '(' name_with_opt_quotes(s /,/) ')' /references/i table_name parens_word_list(?) match_type(?) key_action(s?) |
0efb6e1b |
532 | { |
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533 | my ( $on_delete, $on_update ); |
534 | for my $action ( @{ $item[9] || [] } ) { |
535 | $on_delete = $action->{'action'} if $action->{'type'} eq 'delete'; |
536 | $on_update = $action->{'action'} if $action->{'type'} eq 'update'; |
537 | } |
538 | |
0efb6e1b |
539 | $return = { |
540 | type => 'foreign_key', |
541 | fields => $item[3], |
542 | reference_table => $item[6], |
543 | reference_fields => $item[7][0], |
544 | match_type => $item[8][0], |
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545 | on_delete_do => $on_delete || '', |
546 | on_update_do => $on_update || '', |
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547 | } |
548 | } |
549 | |
550 | deferrable : /not/i /deferrable/i |
551 | { |
552 | $return = ( $item[1] =~ /not/i ) ? 0 : 1; |
553 | } |
4422e22a |
554 | |
0efb6e1b |
555 | deferred : /initially/i /(deferred|immediate)/i { $item[2] } |
4422e22a |
556 | |
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557 | match_type : /match full/i { 'match_full' } |
558 | | |
559 | /match partial/i { 'match_partial' } |
560 | |
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561 | key_action : key_delete |
562 | | |
563 | key_update |
0efb6e1b |
564 | |
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565 | key_delete : /on delete/i key_mutation |
566 | { |
567 | $return => { |
568 | type => 'delete', |
569 | action => $item[2], |
570 | }; |
571 | } |
572 | |
573 | key_update : /on update/i key_mutation |
574 | { |
575 | $return => { |
576 | type => 'update', |
577 | action => $item[2], |
578 | }; |
579 | } |
580 | |
581 | key_mutation : /no action/i { $return = 'no_action' } |
582 | | |
583 | /restrict/i { $return = 'restrict' } |
584 | | |
585 | /cascade/i { $return = 'cascade' } |
586 | | |
587 | /set null/i { $return = 'set_null' } |
588 | | |
589 | /set default/i { $return = 'set_default' } |
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590 | |
0012a163 |
591 | alter : alter_table table_name /add/i table_constraint ';' |
592 | { |
593 | my $table_name = $item[2]; |
594 | my $constraint = $item[4]; |
595 | $constraint->{'type'} = $constraint->{'constraint_type'}; |
596 | push @{ $tables{ $table_name }{'constraints'} }, $constraint; |
597 | } |
598 | |
599 | alter_table : /alter/i /table/i only(?) |
600 | |
601 | only : /only/i |
602 | |
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603 | create_table : /create/i /table/i |
604 | |
605 | create_index : /create/i /index/i |
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606 | |
607 | default_val : /default/i /(?:')?[\w\d.-]*(?:')?/ |
608 | { |
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609 | my $val = $item[2] || ''; |
610 | $val =~ s/'//g; |
611 | $return = { |
612 | meta_type => 'default', |
613 | value => $val, |
614 | } |
4422e22a |
615 | } |
616 | |
4422e22a |
617 | name_with_opt_paren : NAME parens_value_list(s?) |
0efb6e1b |
618 | { $item[2][0] ? "$item[1]($item[2][0][0])" : $item[1] } |
4422e22a |
619 | |
620 | unique : /unique/i { 1 } |
621 | |
622 | key : /key/i | /index/i |
623 | |
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624 | table_option : /inherits/i '(' name_with_opt_quotes(s /,/) ')' |
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625 | { |
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626 | $return = { type => 'inherits', table_name => $item[3] } |
627 | } |
628 | | |
629 | /with(out)? oids/i |
630 | { |
631 | $return = { type => $item[1] =~ /out/i ? 'without_oids' : 'with_oids' } |
4422e22a |
632 | } |
633 | |
0efb6e1b |
634 | SEMICOLON : /\s*;\n?/ |
635 | |
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636 | WORD : /\w+/ |
637 | |
638 | DIGITS : /\d+/ |
639 | |
640 | COMMA : ',' |
641 | |
642 | NAME : "`" /\w+/ "`" |
643 | { $item[2] } |
644 | | /\w+/ |
645 | { $item[1] } |
0012a163 |
646 | | /[\$\w]+/ |
647 | { $item[1] } |
4422e22a |
648 | |
649 | VALUE : /[-+]?\.?\d+(?:[eE]\d+)?/ |
650 | { $item[1] } |
651 | | /'.*?'/ # XXX doesn't handle embedded quotes |
652 | { $item[1] } |
653 | | /NULL/ |
654 | { 'NULL' } |
655 | |
656 | !; |
657 | |
658 | # ------------------------------------------------------------------- |
659 | sub parse { |
660 | my ( $translator, $data ) = @_; |
661 | $parser ||= Parse::RecDescent->new($GRAMMAR); |
662 | |
663 | $::RD_TRACE = $translator->trace ? 1 : undef; |
664 | $DEBUG = $translator->debug; |
665 | |
666 | unless (defined $parser) { |
667 | return $translator->error("Error instantiating Parse::RecDescent ". |
668 | "instance: Bad grammer"); |
669 | } |
670 | |
671 | my $result = $parser->startrule($data); |
672 | die "Parse failed.\n" unless defined $result; |
673 | warn Dumper($result) if $DEBUG; |
674 | return $result; |
675 | } |
676 | |
677 | 1; |
678 | |
679 | #----------------------------------------------------- |
680 | # Where man is not nature is barren. |
681 | # William Blake |
682 | #----------------------------------------------------- |
683 | |
684 | =pod |
685 | |
0efb6e1b |
686 | =head1 AUTHORS |
4422e22a |
687 | |
688 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt>, |
0a7fc605 |
689 | Allen Day <allenday@ucla.edu>. |
4422e22a |
690 | |
691 | =head1 SEE ALSO |
692 | |
693 | perl(1), Parse::RecDescent. |
694 | |
695 | =cut |