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Internationalization and localization through gettext

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gettext src gettext_po_parser.yrl
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src/gettext_po_parser.yrl 

Nonterminals grammar translations translation pluralizations pluralization

             strings comments.

Terminals str msgid msgid_plural msgstr plural_form comment.

Rootsymbol grammar.



grammar ->

  translations : '$1'.



% A series of translations. It can be just comments (which are discarded and can

% be empty anyways) or comments followed by a translation followed by other

% translations; in the latter case, comments are attached to the translation

% that follows them.

translations ->

  comments : [].

translations ->

  comments translation translations : [add_comments_to_translation('$2', '$1')|'$3'].



translation ->

  msgid strings msgstr strings : {translation, #{

    comments       => [],

    msgid          => '$2',

    msgstr         => '$4',

    po_source_line => extract_line('$1')

  }}.

translation ->

  msgid strings msgid_plural strings pluralizations : {plural_translation, #{

    comments       => [],

    msgid          => '$2',

    msgid_plural   => '$4',

    msgstr         => plural_forms_map_from_list('$5'),

    po_source_line => extract_line('$1')

  }}.



pluralizations ->

  pluralization : ['$1'].

pluralizations ->

  pluralization pluralizations : ['$1'|'$2'].



pluralization ->

  msgstr plural_form strings : {'$2', '$3'}.



strings ->

  str : [extract_simple_token('$1')].

strings ->

  str strings : [extract_simple_token('$1')|'$2'].



comments ->

  '$empty' : [].

comments ->

  comment comments : [extract_simple_token('$1')|'$2'].





Erlang code.



extract_simple_token({_Token, _Line, Value}) ->

  Value.



extract_line({_Token, Line}) ->

  Line.



plural_forms_map_from_list(Pluralizations) ->

  Tuples = lists:map(fun extract_plural_form/1, Pluralizations),

  maps:from_list(Tuples).



extract_plural_form({{plural_form, _Line, PluralForm}, String}) ->

  {PluralForm, String}.



add_comments_to_translation({TranslationType, Translation}, Comments) ->

  {TranslationType, maps:put(comments, Comments, Translation)}.