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# Copyright 2022 Jeffrey Kegler |
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# This file is part of Marpa::R2. Marpa::R2 is free software: you can |
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# redistribute it and/or modify it under the terms of the GNU Lesser |
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# General Public License as published by the Free Software Foundation, |
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# either version 3 of the License, or (at your option) any later version. |
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# |
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# Marpa::R2 is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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# Lesser General Public License for more details. |
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# |
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# You should have received a copy of the GNU Lesser |
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# General Public License along with Marpa::R2. If not, see |
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# http://www.gnu.org/licenses/. |
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package Marpa::R2::HTML::Internal::Core; |
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use 5.010001; |
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use strict; |
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use warnings; |
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use Data::Dumper; |
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use English qw( -no_match_vars ); |
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our $CORE_BNF = <<'END_OF_CORE_BNF'; |
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# The tokens are not used directly |
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# because, in order to have handlers |
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# deal with them individually, I need |
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# a rule with which to associate the |
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# handler. |
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comment ::= C |
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pi ::= PI |
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decl ::= D |
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pcdata ::= PCDATA |
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cdata ::= CDATA |
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whitespace ::= WHITESPACE |
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cruft ::= CRUFT |
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FLO_SGML ::= GRP_SGML* |
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GRP_SGML ::= comment |
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GRP_SGML ::= pi |
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GRP_SGML ::= decl |
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GRP_SGML ::= whitespace |
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GRP_SGML ::= cruft |
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# For element x, |
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# ELE_x is complete element |
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# S_x is start tag |
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# E_x is end tag |
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# The contents of many elements consists of zero or more items |
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# Top-level structure |
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document ::= prolog ELE_html trailer EOF |
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prolog ::= FLO_SGML |
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trailer ::= FLO_SGML |
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ELE_html ::= S_html Contents_html E_html |
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Contents_html ::= FLO_SGML ELE_head FLO_SGML ELE_body FLO_SGML |
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# FLO_empty and FLO_cdata |
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# do NOT allow SGML items as part of |
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# their flow |
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FLO_empty ::= |
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# In FLO_cdata, disallow all SGML components, |
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# but include cruft. |
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FLO_cdata ::= GRP_cdata* |
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GRP_cdata ::= CRUFT |
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GRP_cdata ::= cdata |
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FLO_mixed ::= GRP_mixed* |
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GRP_mixed ::= GRP_block |
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GRP_mixed ::= GRP_inline |
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FLO_block ::= GRP_block* |
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GRP_block ::= GRP_SGML |
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GRP_block ::= GRP_anywhere |
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FLO_head ::= GRP_head* |
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GRP_head ::= GRP_SGML |
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GRP_head ::= GRP_anywhere |
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FLO_inline ::= GRP_inline* |
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GRP_inline ::= GRP_SGML |
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GRP_inline ::= pcdata |
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GRP_inline ::= cdata |
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GRP_inline ::= GRP_anywhere |
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FLO_pcdata ::= GRP_pcdata* |
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GRP_pcdata ::= GRP_SGML |
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GRP_pcdata ::= pcdata |
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GRP_pcdata ::= cdata |
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END_OF_CORE_BNF |
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1; |