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parser.leg
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%{
/*
parser.leg -> parser.c -- Parse (Multi)Markdown plain text for
conversion into other formats
(c) 2013 Fletcher T. Penney (http://fletcherpenney.net/).
Derived from peg-multimarkdown, which was forked from peg-markdown,
which is (c) 2008 John MacFarlane (jgm at berkeley dot edu), and
licensed under GNU GPL or MIT.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License or the MIT
license. See LICENSE for details.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*/
#include "parser.h"
#include "writer.h"
/* Define shortcuts to adding nodes, etc. */
#define node(x) mk_pos_node(x, NULL, thunk->begin, thunk->end)
#define str(x) mk_pos_str(x, thunk->begin, thunk->end)
#define list(x,y) mk_pos_list(x, y, thunk->begin, thunk->end)
#define ext(x) extension(x,((parser_data *)G->data)->extensions)
#define YY_INPUT(buf, result, max_size, D) yy_input_func(buf, &result, max_size, (parser_data *)G->data)
/* redefine input buffer so that we draw from the specified source string
to make it thread/reentrant safe */
void yy_input_func(char *buf, int *result, int max_size, parser_data *data)
{ \
int yyc; \
if (data->charbuf && (*(data->charbuf) != '\0')) { \
yyc = *(data->charbuf)++; \
} else { \
yyc= EOF; \
} \
(*result) = (EOF == yyc) ? 0 : (*(buf)= yyc, 1); \
}
%}
Doc = BOM? a:StartList b:StartList
( &{ !ext(EXT_COMPATIBILITY) && !ext(EXT_NO_METADATA) }
&( MetaDataKey Sp ':' Sp (!Newline)) MetaData
{ a = cons($$, a); b = node(FOOTER); } )?
( Block { a = cons($$, a); } )*
BlankLine*
{
if (b!= NULL) a = cons(b,a);
((parser_data *)G->data)->result = reverse_list(a);
}
MetaData = a:StartList !([A-Za-z]+ "://") !SetextHeading
(MetaDataKeyValue { a = cons($$, a); })+
{ $$ = list(METADATA, a); }
MetaDataKeyValue = a:MetaDataKey Sp ':' Sp b:MetaDataValue
{
$$ = a;
$$->children = b;
}
MetaDataKey = < !([A-Za-z]+ "://") AlphanumericAscii ( Sp ( AlphanumericAscii | '_' | ' ' | '-' | '.' )+)* >
{
$$ = str(yytext);
$$->key = METAKEY;
}
SingleLineMetaKeyValue = MetaDataKey Sp ':' Sp (!Newline .)*
MetaDataValue = a:StartList
((< (!Newline .)* > { a = cons(str(yytext), a); })
((Newline &(!BlankLine !SingleLineMetaKeyValue Sp RawLine))
{ a = cons(str("\n"), a); } | Newline)
(!BlankLine !SingleLineMetaKeyValue Sp RawLine
{ a = cons(str(yytext), a); } )* )
{
$$ = mk_str_from_list(a, false);
$$->key = METAVALUE;
}
DocForMetaDataOnly = BOM? a:StartList
( &( MetaDataKey Sp ':' Sp (!Newline)) MetaData
{ a = cons($$, a); } )?
( SkipBlock )*
BlankLine*
{
((parser_data *)G->data)->result = reverse_list(a);
}
SkipBlock = HtmlBlock
| ( !'#' !SetextBottom1 !SetextBottom2 !BlankLine RawLine )+ BlankLine*
| BlankLine+
| RawLine
Block = BlankLine*
( BlockQuote
| &{ !ext(EXT_COMPATIBILITY) } Fenced
| Verbatim
| &{ !ext(EXT_COMPATIBILITY) } DefinitionList
| &{ !ext(EXT_COMPATIBILITY) } Glossary
| Note
| LinkReference
| HorizontalRule
| HeadingSection
| OrderedList
| BulletList
| HtmlBlock
| MarkdownHtmlBlock
| StyleBlock
| &{ !ext(EXT_COMPATIBILITY) } Table
| &{ !ext(EXT_COMPATIBILITY) } ImageBlock
| !(Sp HtmlBlockInTags) Para
| Plain )
HeadingSectionBlock = BlankLine* !Heading
( BlockQuote
| &{ !ext(EXT_COMPATIBILITY) } Fenced
| Verbatim
| &{ !ext(EXT_COMPATIBILITY) } DefinitionList
| &{ !ext(EXT_COMPATIBILITY) } Glossary
| Note
| LinkReference
| HorizontalRule
| OrderedList
| BulletList
| HtmlBlock
| MarkdownHtmlBlock
| StyleBlock
| &{ !ext(EXT_COMPATIBILITY) } Table
| &{ !ext(EXT_COMPATIBILITY) } ImageBlock
| !(Sp HtmlBlockInTags) Para
| Plain )
Heading = SetextHeading | AtxHeading
HeadingSection = a:StartList Heading { a = cons($$, a); }
(HeadingSectionBlock {a = cons($$, a); })*
{ $$ = list(HEADINGSECTION, a); }
AtxInline = !Newline !( &{ !ext(EXT_COMPATIBILITY) } Sp AutoLabel Sp '#'* Sp Newline) !(Sp '#'* Sp Newline) Inline
AtxStart = < ( "######" | "#####" | "####" | "###" | "##" | "#" ) >
{ $$ = node(H1 + ((int)strlen(yytext) - 1)); }
AtxHeading = s:AtxStart Sp a:StartList ( AtxInline { a = cons($$, a); } )+ ( Sp b:AutoLabel { append_list(b,a);})? (Sp '#'* Sp)? Sp < Newline >
# <newline> ensures that we count characters all the way to the end
{ $$ = list(s->key,a); free(s); }
SetextHeading = SetextHeading1 | SetextHeading2
SetextBottom1 = '='+ Newline
SetextBottom2 = '-'+ Newline
SetextHeading1 = &(RawLine SetextBottom1)
a:StartList ( !Endline !( &{ !ext(EXT_COMPATIBILITY) } Sp AutoLabel ) Inline { a = cons($$, a); } )+ ( Sp b:AutoLabel { append_list(b,a);} Sp )? Sp Newline
<SetextBottom1> { $$ = list(H1, a); }
SetextHeading2 = &(RawLine SetextBottom2)
a:StartList ( !Endline !( &{ !ext(EXT_COMPATIBILITY) } Sp AutoLabel ) Inline { a = cons($$, a); } )+ ( Sp b:AutoLabel { append_list(b,a)} Sp )? Sp Newline
<SetextBottom2> { $$ = list(H2, a); }
BlockQuote = a:BlockQuoteRaw
{ $$ = list(BLOCKQUOTE,a); }
BlockQuoteRaw = a:StartList
(( b:BlockQuoteMarker Line { a = cons($$, a); } )
( !'>' !BlankLine Line { a = cons($$, a); } )*
( BlankLine { a = cons(mk_str("\n"), a); } )*
)+
{
$$ = b;
node *raw;
raw = mk_str_from_list(a, true);
raw->key = RAW;
$$->children = raw;
}
BlockQuoteMarker = < ">" ' '? >
{ $$ = str(yytext); $$->key = BLOCKQUOTEMARKER; }
BOM = "\357\273\277"
Eof = !.
Newline = '\n' | '\r' '\n'?
Line = RawLine
{ $$ = str(yytext); }
RawLine = ( < (!'\r' !'\n' .)* Newline > | < .+ > Eof )
NonMatchingRawLine = ( (!'\r' !'\n' .)* Newline | .+ Eof )
BlankLine = Sp Newline
Sp = Spacechar*
Spnl = Sp (Newline Sp)?
Spacechar = ' ' | '\t'
Nonspacechar = !Spacechar !Newline .
NormalChar = !( SpecialChar | Spacechar | Newline ) .
SpecialChar = '*' | '_' | '`' | '&' | '[' | ']' | '(' | ')' | '<' | '!' | '#' | '\\' | '\'' | '"' | ExtendedSpecialChar
ExtendedSpecialChar = &{ ext(EXT_SMART) } ('.' | '-' | '\'' | '"')
| &{ ext(EXT_NOTES) } ( '^' )
| &{ ext(EXT_CRITIC) } ( '{' )
| &{ !ext(EXT_COMPATIBILITY) } ( '~' )
| &{ !ext(EXT_COMPATIBILITY) } ( '|' )
Punctuation = '.' | ',' | '?' | '!' | ';' | ':'
NonPunctuation = !(Punctuation | SpecialChar | Spacechar | Newline) .
Quoted = '"' (!'"' .)* '"' | '\'' (!'\'' .)* '\''
HtmlAttribute = (AlphanumericAscii | '-')+ Spnl ('=' Spnl (Quoted | (!'>' Nonspacechar)+))? Spnl
HtmlComment = "<!--" (!"-->" .)* "-->"
HtmlTag = '<' Spnl '/'? AlphanumericAscii+ Spnl HtmlAttribute* '/'? Spnl '>'
RawHtml = < (HtmlComment | HtmlBlockScript | HtmlTag) >
{
if (ext(EXT_FILTER_HTML)) {
$$ = list(LIST, NULL);
} else {
$$ = str(yytext);
$$->key = HTML;
}
}
Alphanumeric = [0-9A-Za-z] | '\200' | '\201' | '\202' | '\203' | '\204' | '\205' | '\206' | '\207' | '\210' | '\211' | '\212' | '\213' | '\214' | '\215' | '\216' | '\217' | '\220' | '\221' | '\222' | '\223' | '\224' | '\225' | '\226' | '\227' | '\230' | '\231' | '\232' | '\233' | '\234' | '\235' | '\236' | '\237' | '\240' | '\241' | '\242' | '\243' | '\244' | '\245' | '\246' | '\247' | '\250' | '\251' | '\252' | '\253' | '\254' | '\255' | '\256' | '\257' | '\260' | '\261' | '\262' | '\263' | '\264' | '\265' | '\266' | '\267' | '\270' | '\271' | '\272' | '\273' | '\274' | '\275' | '\276' | '\277' | '\300' | '\301' | '\302' | '\303' | '\304' | '\305' | '\306' | '\307' | '\310' | '\311' | '\312' | '\313' | '\314' | '\315' | '\316' | '\317' | '\320' | '\321' | '\322' | '\323' | '\324' | '\325' | '\326' | '\327' | '\330' | '\331' | '\332' | '\333' | '\334' | '\335' | '\336' | '\337' | '\340' | '\341' | '\342' | '\343' | '\344' | '\345' | '\346' | '\347' | '\350' | '\351' | '\352' | '\353' | '\354' | '\355' | '\356' | '\357' | '\360' | '\361' | '\362' | '\363' | '\364' | '\365' | '\366' | '\367' | '\370' | '\371' | '\372' | '\373' | '\374' | '\375' | '\376' | '\377'
AlphanumericAscii = [A-Za-z0-9]
Digit = [0-9]
HexEntity = < '&' '#' [Xx] [0-9a-fA-F]+ ';' >
DecEntity = < '&' '#' [0-9]+ > ';' >
CharEntity = < '&' [A-Za-z0-9]+ ';' >
NonindentSpace = " " | " " | " " | ""
Indent = "\t" | " "
IndentedLine = Indent Line
OptionallyIndentedLine = Indent? Line
Symbol = < SpecialChar >
{ $$ = str(yytext); }
EscapedChar = '\\' !Newline < [-\\`|*_{}[\]()#+.!$><'""] >
{ $$ = str(yytext); }
Entity = ( HexEntity | DecEntity | CharEntity )
{ $$ = str(yytext); $$->key = HTML; }
Para = NonindentSpace a:Inlines BlankLine+
{ $$ = a; $$->key = PARA; }
Plain = a:Inlines
{ $$ = a; $$->key = PLAIN; }
Inlines = a:StartList ( !Endline Inline { a = cons($$, a); }
| c:Endline &Inline { a = cons(c, a); } )+ voidEndline?
{ $$ = list(LIST, a); }
Inline = #&{ check_timeout((parser_data *)G->data) }
# TODO: the check_timeout function still slows us down -- do we still need it??
&{ ext(EXT_CRITIC) } CriticMarkup
| &{ !ext(EXT_COMPATIBILITY) } DollarMath
| Str
| &{ !ext(EXT_COMPATIBILITY) } MathSpan
| Endline
| UlOrStarLine
| Space
| StrongAndEmph
| Strong
| Emph
| &{ !ext(EXT_COMPATIBILITY) } CitationReference
| Image
| Link
| NoteReference
| Code
| MarkdownHtmlTagOpen
| RawHtml
| Entity
| EscapedChar
| Smart
| Symbol
Space = Spacechar+
{ $$ = str(" "); $$->key = SPACE; }
Endline = LineBreak | TerminalEndline | NormalEndline
NormalEndline = Sp Newline !BlankLine !'>' !AtxStart
!(Line ('='+ | '-'+) Newline)
{
$$ = str("\n");
$$->key = SPACE;
}
TerminalEndline = Sp Newline Eof
{ $$ = NULL; }
LineBreak = " " a:NormalEndline
{ $$ = a; $$->key = LINEBREAK; }
voidEndline = (" " voidNormalEndline) | (Sp Newline Eof) | voidNormalEndline
voidNormalEndline = Sp Newline !BlankLine !'>' !AtxStart
!(Line ('='+ | '-'+) Newline)
Str = a:StartList < NormalChar+ > { a = cons(str(yytext), a); }
( StrChunk { a = cons($$, a); } )*
( &{ !ext(EXT_COMPATIBILITY) } ( Superscript | Subscript) {a = cons($$, a); } )*
{ if (a->next == NULL) { $$ = a; } else { $$ = list(LIST, a); } }
StrChunk = < (NormalChar | '_'+ &Alphanumeric)+ > { $$ = str(yytext); } |
AposChunk
AposChunk = &{ ext(EXT_SMART) } '\'' &Alphanumeric
{ $$ = node(APOSTROPHE); }
Superscript = '^' < (((!'^' Nonspacechar)+ &'^') | (!'^' NonPunctuation)+ ) > '^'?
{ $$ = str(yytext); $$->key = SUPERSCRIPT; }
Subscript = '~' < (((!'~' Nonspacechar)+ &'~') | (!'~' NonPunctuation)+ ) > '~'?
{ $$ = str(yytext); $$->key = SUBSCRIPT; }
StartList = &.
{ $$ = NULL; }
MathSpan = '\\' < (
('\\[' (!'\\\\]' .)* '\\\\]') |
('\\(' (!'\\\\)' .)* '\\\\)') ) >
{
/* Basically, these delimiters indicate math in LaTeX syntax, and the
delimiters are compatible with MathJax and LaTeX
ASCIIMathML is *not* supported */
$$ = str(yytext);
$$->key = MATHSPAN;
}
SingleDollarMathStart = '$' !(Spacechar | Newline | '$' )
SingleDollarMathEnd = (!'\\' !'$' Nonspacechar) '$' !NonPunctuation
SingleDollarMath = < SingleDollarMathStart (!SingleDollarMathEnd !(BlankLine BlankLine) .)* SingleDollarMathEnd >
{ $$ = str(yytext); $$->key = MATHSPAN; }
DoubleDollarMathStart = '$' '$' !(Spacechar | Newline)
DoubleDollarMathEnd = (!'\\' Nonspacechar) '$' '$' !NonPunctuation
DoubleDollarMath = < DoubleDollarMathStart (!DoubleDollarMathEnd !(BlankLine BlankLine) .)* DoubleDollarMathEnd >
{ $$ = str(yytext); $$->key = MATHSPAN; }
DollarMath = SingleDollarMath | DoubleDollarMath
# This keeps the parser from getting bogged down on long strings of '*' or '_',
# or strings of '*' or '_' with space on each side:
UlOrStarLine = (UlLine | StarLine) { $$ = str(yytext); }
StarLine = < "****" '*'* > | < Spacechar '*'+ &Spacechar >
UlLine = < "____" '_'* > | < Spacechar '_'+ &Spacechar >
Emph = EmphStar | EmphUl
Whitespace = Spacechar | Newline
EmphStar = '*' !Whitespace
a:StartList
( !'*' b:Inline { a = cons(b, a); }
| b:StrongStar { a = cons(b, a); }
)+
<'*'>
{ $$ = list(EMPH, a); }
EmphUl = '_' !Whitespace
a:StartList
( !'_' b:Inline { a = cons(b, a); }
| b:StrongUl { a = cons(b, a); }
)+
<'_'>
{ $$ = list(EMPH, a); }
Strong = StrongStar | StrongUl
StrongStar = "**" !Whitespace
a:StartList
( !"**" b:Inline { a = cons(b, a); })+
<"**">
{ $$ = list(STRONG, a); }
StrongUl = "__" !Whitespace
a:StartList
( !"__" b:Inline { a = cons(b, a); })+
<"__">
{ $$ = list(STRONG, a); }
StrongAndEmph = StrongAndEmphStar | StrongAndEmphUl
StrongAndEmphStar = "***" !Whitespace
a:StartList
( !"***" !"**" !"*" b:Inline { a = cons(b, a); })+
<"***">
{
$$ = list(EMPH, a);
$$ = list(STRONG, $$);
}
StrongAndEmphUl = "___" !Whitespace
a:StartList
( !"___" b:Inline { a = cons(b, a); })+
<"___">
{
$$ = list(EMPH, a);
$$ = list(STRONG, $$);
}
Link = ExplicitLink | ReferenceLink | AutoLink
ReferenceLink = ReferenceLinkDouble | ReferenceLinkSingle
ReferenceLinkDouble = ( a:Label < Spnl > !"[]" b:Label )
{
GString *text = g_string_new("");
print_raw_node_tree(text, b->children);
$$ = mk_link(a, text->str, NULL, NULL, NULL);
g_string_free(text, TRUE);
free_node_tree(b);
}
ReferenceLinkSingle = ( a:Label < (Spnl "[]")? > )
{
$$ = mk_link(a, NULL, NULL, NULL, NULL);
/* stash copy of raw source in case we need if */
$$->str = strdup(yytext);
}
CitationReference = CitationReferenceDouble | CitationReferenceSingle
CitationReferenceDouble = !"[]" a:Label < Spnl > !"[]" b:RawCitationReference
{
char *label;
label = label_from_node_tree(a);
$$ = mk_link(a, b->str, NULL, NULL, NULL);
$$->key = CITATION;
if (strcmp(label,"notcited") == 0)
$$->key = NOCITATION;
free(label);
free_node_tree(b);
}
CitationReferenceSingle = < (( "[]" Spnl b:RawCitationReference )
| ( b:RawCitationReference (Spnl "[]")? )) >
{
$$ = mk_link(NULL, b->str, NULL, NULL, NULL);
$$->key = CITATION;
free_node_tree(b);
}
RawCitationReference = "[#" < ( !Newline !']' . )+ > ']'
{ $$ = str(yytext); }
ExplicitLink = l:Label '(' Sp s:Source Spnl t:Title Sp <')'>
{
$$ = mk_link(l, NULL, s->str, t->str, NULL);
free_node_tree(s);
free_node_tree(t);
}
Source = ( '<' < SourceContents > '>' | < SourceContents > )
{ $$ = str(yytext); $$->key = SOURCE; }
SourceContents = ( ( !'(' !')' !'>' Nonspacechar )+ | '(' SourceContents ')')*
Title = ( TitleSingle | TitleDouble | < "" > )
{ $$ = str(yytext); $$->key = TITLE; }
TitleSingle = '\'' < ( !( '\'' Sp ( ')' | Newline ) ) . )* > '\''
TitleDouble = '"' < ( !( '"' Sp ( ')' | Newline ) ) . )* > '"'
AutoLink = AutoLinkUrl | AutoLinkEmail
AutoLinkUrl = '<' < [A-Za-z]+ "://" ( !Newline !'>' . )+ > '>'
{
$$ = mk_link(str(yytext), NULL, yytext, NULL, NULL);
}
AutoLinkEmail = '<' ( "mailto:" )? < [-A-Za-z0-9+_./!%~$]+ '@' ( !Newline !'>' . )+ > '>'
{
char *mailto = malloc(strlen(yytext) + 8);
sprintf(mailto, "mailto:%s", yytext);
$$ = mk_link(str(yytext), NULL, mailto, NULL, NULL);
free(mailto);
}
LinkReference = a:StartList NonindentSpace !"[]" l:Label ':' Spnl s:RefSrc
t:RefTitle
( &{ !ext(EXT_COMPATIBILITY) } <Attributes { a = reverse_list($$); } )?>
BlankLine+ # TODO: Can I get rid of this to allow sequential references?
{
/* Get label for referencing */
GString *text = g_string_new("");
char *clean;
print_raw_node_tree(text, l->children);
clean = clean_string(text->str);
if (a == NULL) {
/* no attributes */
$$ = mk_link(NULL, clean, s->str, t->str, NULL);
} else {
$$ = mk_link(NULL, clean, s->str, t->str, a);
}
g_string_free(text, TRUE);
free_node(s);
free_node(t);
free_node_tree(l);
free(clean);
$$->key = LINKREFERENCE;
}
Attributes = a:StartList (Attribute { a = cons($$,a); })+
{ $$ = a; }
Attribute = Spnl a:AttrKey '=' b:AttrValue
{
$$ = a;
$$->children = b;
}
AttrKey = < AlphanumericAscii+ >
{
char *lab;
lab = label_from_string(yytext);
$$ = mk_str(lab);
$$->key = ATTRKEY;
free(lab);
}
AttrValue = (QuotedValue | UnQuotedValue)
{ $$ = str(yytext); $$->key = ATTRVALUE; }
RefSrc = < Nonspacechar+ >
{ $$ = str(yytext); $$->key = HTML; }
RefTitle = ( RefTitleSingle | RefTitleDouble | RefTitleParens | EmptyTitle )
{ $$ = str(yytext); $$->key = RAW; }
EmptyTitle = < "" >
RefTitleSingle = Spnl '\'' < ( !( '\'' Sp Newline | Newline |
&{ !ext(EXT_COMPATIBILITY) } '\'' Sp AlphanumericAscii+ '=' ) . )* > '\''
RefTitleDouble = Spnl '"' < ( !('"' Sp Newline | Newline |
&{ !ext(EXT_COMPATIBILITY) } '"' Sp AlphanumericAscii+ '=' ) . )* > '"'
RefTitleParens = Spnl '(' < ( !(')' Sp Newline | Newline |
&{ !ext(EXT_COMPATIBILITY) } ')' Sp AlphanumericAscii+ '=' ) . )* > ')'
QuotedValue = '"' < (!'"' .)* > '"'
UnQuotedValue = < (AlphanumericAscii | '.')+ >
ImageBlock = Image Sp Newline BlankLine+
{ if ($$->key == IMAGE) $$->key = IMAGEBLOCK; }
Image = '!' ( !AutoLink Link )
{ $$->key = IMAGE; }
Label = < "[" !'[' ( !'^' !'#' &{ ext(EXT_NOTES) } | &. &{ !ext(EXT_NOTES) } )
a:StartList
( !']' Inline { a = cons($$, a); } )*
']'>
{ $$ = list(LIST, a); }
AutoLabel = '[' < (!Newline !'^' !'#' . )( !Newline !']' . )+ > ']' &(!(Sp ('(' | '[')))
{
node *ref;
$$ = str(yytext);
$$->key = AUTOLABEL;
/* And create a LINKREFERENCE so we can use it */
char *label = label_from_string(yytext);
GString *anchor = g_string_new(label);
g_string_prepend(anchor, "#");
ref = mk_link(NULL, label, anchor->str, NULL, NULL);
g_string_free(anchor, true);
free(label);
((parser_data *)G->data)->autolabels = cons(ref,((parser_data *)G->data)->autolabels);
ref->key = LINKREFERENCE;
}
# NoteReference = &{ ext(EXT_NOTES) } ( "[^" | "[#" ) < ( !Newline !']' . )+ > ']'
NoteReference = &{ ext(EXT_NOTES) } ( "[^" ) < ( !Newline !']' . )+ > ']'
{ $$ = str(yytext); $$->key = NOTEREFERENCE; }
Glossary = &{ ext(EXT_NOTES) }
a:StartList
NonindentSpace ref:RawNoteReference ':' Sp
"glossary:" Sp (GlossaryTerm { a = cons($$, a); })
(GlossarySortKey { a = cons($$, a); })?
Newline
( RawNoteBlock { a = cons($$, a); } )
( &Indent RawNoteBlock { a = cons($$, a); } )*
{
node *label;
label = str(ref->str);
label->key = NOTELABEL;
a = cons(label,a);
$$ = list(GLOSSARYSOURCE, a);
$$->str = strdup(ref->str);
free_node(ref);
}
GlossaryTerm = < (!Newline !'(' .)+ >
{
$$ = mk_list(LIST, NULL);
$$->str = 0;
$$->children = mk_str(yytext);
$$->key = GLOSSARYTERM;
}
GlossarySortKey = '(' < (!')' !Newline .)* > ')'
{ $$ = mk_str(yytext); $$->key = GLOSSARYSORTKEY; }
Ticks1 = "`" !'`'
Ticks2 = "``" !'`'
Ticks3 = "```" !'`'
Ticks4 = "````" !'`'
Ticks5 = "`````" !'`'
Code = ( Ticks1 Sp < ( ( !'`' Nonspacechar )+ | !Ticks1 '`'+ | !( Sp Ticks1 ) ( Spacechar | Newline !BlankLine ) )+ > Sp Ticks1
| Ticks2 Sp < ( ( !'`' Nonspacechar )+ | !Ticks2 '`'+ | !( Sp Ticks2 ) ( Spacechar | Newline !BlankLine ) )+ > Sp Ticks2
| Ticks3 Sp < ( ( !'`' Nonspacechar )+ | !Ticks3 '`'+ | !( Sp Ticks3 ) ( Spacechar | Newline !BlankLine ) )+ > Sp Ticks3
| Ticks4 Sp < ( ( !'`' Nonspacechar )+ | !Ticks4 '`'+ | !( Sp Ticks4 ) ( Spacechar | Newline !BlankLine ) )+ > Sp Ticks4
| Ticks5 Sp < ( ( !'`' Nonspacechar )+ | !Ticks5 '`'+ | !( Sp Ticks5 ) ( Spacechar | Newline !BlankLine ) )+ > Sp Ticks5
)
{ $$ = str(yytext); $$->key = CODE; }
FenceType = Sp Line
{ $$ = str(yytext); $$->key = VERBATIMTYPE; }
Fenced = (( Ticks3 a:FenceType < ( (!Ticks3 NonMatchingRawLine)* ) > Ticks3 Newline ) |
( Ticks4 a:FenceType < ( (!Ticks4 NonMatchingRawLine)* ) > Ticks4 Newline ) |
( Ticks5 a:FenceType < ( (!Ticks5 NonMatchingRawLine)* ) > Ticks5 Newline ) )
{
$$ = str(yytext); $$->key = VERBATIM;
$$->children = a;
}
Smart = &{ ext(EXT_SMART) }
( Ellipsis | Dash | SingleQuoted | DoubleQuoted | Apostrophe )
Apostrophe = '\''
{ $$ = node(APOSTROPHE); }
Ellipsis = ("..." | ". . .")
{ $$ = node(ELLIPSIS); }
Dash = EmDash | EnDash
EnDash = < ( "--" | '-' &Digit) >
{ $$ = str(yytext); $$->key = ENDASH; }
EmDash = ( <"---"> )
{ $$ = str(yytext); $$->key = EMDASH; }
SingleQuoteStart = '\'' !(Spacechar | Newline)
SingleQuoteEnd = '\'' !Alphanumeric
SingleQuoted = SingleQuoteStart
a:StartList
( !SingleQuoteEnd b:Inline { a = cons(b, a); } )+
SingleQuoteEnd
{ $$ = mk_list(SINGLEQUOTED, a); }
DoubleQuoteStart = '"'
DoubleQuoteEnd = '"'
DoubleQuoted = DoubleQuoteStart
a:StartList
( !DoubleQuoteEnd b:Inline { a = cons(b, a); } )+
DoubleQuoteEnd
{ $$ = mk_list(DOUBLEQUOTED, a); }
NonblankIndentedLine = !BlankLine IndentedLine
VerbatimChunk = a:StartList
( BlankLine { a = cons(mk_str("\n"), a); } )*
( NonblankIndentedLine { a = cons($$, a); } )+
{ $$ = mk_str_from_list(a, false); }
Verbatim = BlankLine* a:StartList
( VerbatimChunk { a = cons($$, a); } )+ BlankLine*
{ $$ = mk_str_from_list(a, false); $$->key = VERBATIM; }
HorizontalRule = NonindentSpace
( '*' Sp '*' Sp '*' (Sp '*')*
| '-' Sp '-' Sp '-' (Sp '-')*
| '_' Sp '_' Sp '_' (Sp '_')*)
Sp Newline BlankLine+
{ $$ = mk_node(HRULE); }
DefinitionList = a:StartList &(TermLine+ Newline? NonindentSpace ':')
( (Term { a = cons($$, a); } )+
BlankLine?
(Definition { a = cons($$, a);})+
BlankLine*
)+
{ $$ = mk_list(LIST, a); $$->key = DEFLIST; }
TermLine = !':' !BlankLine (!Newline .)* Newline
Term = a:StartList !BlankLine !':'
(!Newline !Endline Inline {a = cons($$, a);} )+ Newline
{ $$ = mk_list(TERM,a); }
Definition = (a:StartList b:StartList
(BlankLine { b = cons(mk_str("\n"),b); } )?
( NonindentSpace ':' Sp RawLine { a = cons(mk_str(yytext), a);})
( !':' !BlankLine RawLine { a = cons(mk_str(yytext), a);})*
( BlankLine {a = cons(mk_str("\n"),a);}
(IndentedLine { a = cons(mk_str(yytext),a);})+
{ a = cons(mk_str("\n"),a);}
)* )
{
if (b != NULL) { a = cons(b,a);}
node *raw = mk_str_from_list(a, false);
raw->key = RAW;
$$ = list(DEFINITION,raw);
}
Bullet = !HorizontalRule NonindentSpace ('+' | '*' | '-') Spacechar+
BulletList = &Bullet (ListTight | ListLoose)
{ $$->key = BULLETLIST; }
ListTight = a:StartList
( ListItemTight { a = cons($$, a); } )+
BlankLine* !(Bullet | Enumerator)
{ $$ = list(LIST, a); }
ListLoose = a:StartList
( b:ListItem BlankLine*
{
node *li;
li = b->children;
li->str = realloc(li->str, strlen(li->str) + 3);
strcat(li->str, "\n\n"); /* In loose list, \n\n added to end of each element */
a = cons(b, a);
} )+
{ $$ = list(LIST, a); }
ListItem = < ( Bullet | Enumerator )>
a:StartList
ListBlock { a = cons($$, a); }
( ListContinuationBlock { a = cons($$, a); } )*
{
node *raw;
raw = mk_str_from_list(a, false);
raw->key = RAW;
$$ = node(LISTITEM);
$$->children = raw;
}
ListItemTight = ( Bullet | Enumerator )
a:StartList
ListBlock { a = cons($$, a); }
( !BlankLine
ListContinuationBlock { a = cons($$, a); } )*
!ListContinuationBlock
{
node *raw;
raw = mk_str_from_list(a, false);
raw->key = RAW;
$$ = node(LISTITEM);
$$->children = raw;
}
ListBlock = a:StartList
!BlankLine Line { a = cons($$, a); }
( ListBlockLine { a = cons($$, a); } )*
{ $$ = mk_str_from_list(a, false); }
ListContinuationBlock = a:StartList
( < BlankLine* >
{
if (strlen(yytext) == 0)
a = cons(str("\001"), a); /* block separator */
else
a = cons(str(yytext), a);
} )
( Indent ListBlock { a = cons($$, a); } )+
{ $$ = mk_str_from_list(a, false); }
Enumerator = NonindentSpace [0-9]+ '.' Spacechar+
OrderedList = &Enumerator (ListTight | ListLoose)
{ $$->key = ORDEREDLIST; }
ListBlockLine = !BlankLine
!( Indent? (Bullet | Enumerator) )
!HorizontalRule
OptionallyIndentedLine
# Parsers for different kinds of block-level HTML content.
# This is repetitive due to constraints of PEG grammar.
HtmlBlockOpenAddress = '<' Spnl ("address" | "ADDRESS") Spnl HtmlAttribute* '>'
HtmlBlockCloseAddress = '<' Spnl '/' ("address" | "ADDRESS") Spnl '>'
HtmlBlockAddress = HtmlBlockOpenAddress (HtmlBlockAddress | !HtmlBlockCloseAddress .)* HtmlBlockCloseAddress
HtmlBlockOpenArticle = '<' Spnl ("article" | "ARTICLE") Spnl HtmlAttribute* '>'
HtmlBlockCloseArticle = '<' Spnl '/' ("article" | "ARTICLE") Spnl '>'
HtmlBlockArticle = HtmlBlockOpenArticle (HtmlBlockArticle | !HtmlBlockCloseArticle .)* HtmlBlockCloseArticle
HtmlBlockOpenAside = '<' Spnl ("aside" | "ASIDE") Spnl HtmlAttribute* '>'
HtmlBlockCloseAside = '<' Spnl '/' ("aside" | "ASIDE") Spnl '>'
HtmlBlockAside = HtmlBlockOpenAside (HtmlBlockAside | !HtmlBlockCloseAside .)* HtmlBlockCloseAside
HtmlBlockOpenBlockquote = '<' Spnl ("blockquote" | "BLOCKQUOTE") Spnl HtmlAttribute* '>'
HtmlBlockCloseBlockquote = '<' Spnl '/' ("blockquote" | "BLOCKQUOTE") Spnl '>'
HtmlBlockBlockquote = HtmlBlockOpenBlockquote (HtmlBlockBlockquote | !HtmlBlockCloseBlockquote .)* HtmlBlockCloseBlockquote
HtmlBlockOpenCanvas = '<' Spnl ("canvas" | "CANVAS") Spnl HtmlAttribute* '>'
HtmlBlockCloseCanvas = '<' Spnl '/' ("canvas" | "CANVAS") Spnl '>'
HtmlBlockCanvas = HtmlBlockOpenCanvas (HtmlBlockCanvas | !HtmlBlockCloseCanvas .)* HtmlBlockCloseCanvas
HtmlBlockOpenCenter = '<' Spnl ("center" | "CENTER") Spnl HtmlAttribute* '>'
HtmlBlockCloseCenter = '<' Spnl '/' ("center" | "CENTER") Spnl '>'
HtmlBlockCenter = HtmlBlockOpenCenter (HtmlBlockCenter | !HtmlBlockCloseCenter .)* HtmlBlockCloseCenter
HtmlBlockOpenDir = '<' Spnl ("dir" | "DIR") Spnl HtmlAttribute* '>'
HtmlBlockCloseDir = '<' Spnl '/' ("dir" | "DIR") Spnl '>'
HtmlBlockDir = HtmlBlockOpenDir (HtmlBlockDir | !HtmlBlockCloseDir .)* HtmlBlockCloseDir
HtmlBlockOpenDiv = '<' Spnl ("div" | "DIV") Spnl HtmlAttribute* '>'
HtmlBlockCloseDiv = '<' Spnl '/' ("div" | "DIV") Spnl '>'
HtmlBlockDiv = HtmlBlockOpenDiv (HtmlBlockDiv | !HtmlBlockCloseDiv .)* HtmlBlockCloseDiv
HtmlBlockOpenDl = '<' Spnl ("dl" | "DL") Spnl HtmlAttribute* '>'
HtmlBlockCloseDl = '<' Spnl '/' ("dl" | "DL") Spnl '>'
HtmlBlockDl = HtmlBlockOpenDl (HtmlBlockDl | !HtmlBlockCloseDl .)* HtmlBlockCloseDl
HtmlBlockOpenFieldset = '<' Spnl ("fieldset" | "FIELDSET") Spnl HtmlAttribute* '>'
HtmlBlockCloseFieldset = '<' Spnl '/' ("fieldset" | "FIELDSET") Spnl '>'
HtmlBlockFieldset = HtmlBlockOpenFieldset (HtmlBlockFieldset | !HtmlBlockCloseFieldset .)* HtmlBlockCloseFieldset
HtmlBlockOpenFigure = '<' Spnl ("figure" | "FIGURE") Spnl HtmlAttribute* '>'
HtmlBlockCloseFigure = '<' Spnl '/' ("figure" | "FIGURE") Spnl '>'
HtmlBlockFigure = HtmlBlockOpenFigure (HtmlBlockFigure | !HtmlBlockCloseFigure .)* HtmlBlockCloseFigure
HtmlBlockOpenFooter = '<' Spnl ("footer" | "FOOTER") Spnl HtmlAttribute* '>'
HtmlBlockCloseFooter = '<' Spnl '/' ("footer" | "FOOTER") Spnl '>'
HtmlBlockFooter = HtmlBlockOpenFooter (HtmlBlockFooter | !HtmlBlockCloseFooter .)* HtmlBlockCloseFooter
HtmlBlockOpenForm = '<' Spnl ("form" | "FORM") Spnl HtmlAttribute* '>'
HtmlBlockCloseForm = '<' Spnl '/' ("form" | "FORM") Spnl '>'
HtmlBlockForm = HtmlBlockOpenForm (HtmlBlockForm | !HtmlBlockCloseForm .)* HtmlBlockCloseForm
HtmlBlockOpenHeader = '<' Spnl ("header" | "HEADER") Spnl HtmlAttribute* '>'
HtmlBlockCloseHeader = '<' Spnl '/' ("header" | "HEADER") Spnl '>'
HtmlBlockHeader = HtmlBlockOpenHeader (HtmlBlockHeader | !HtmlBlockCloseHeader .)* HtmlBlockCloseHeader
HtmlBlockOpenHgroup = '<' Spnl ("hgroup" | "HGROUP") Spnl HtmlAttribute* '>'
HtmlBlockCloseHgroup = '<' Spnl '/' ("hgroup" | "HGROUP") Spnl '>'
HtmlBlockHgroup = HtmlBlockOpenHgroup (HtmlBlockHgroup | !HtmlBlockCloseHgroup .)* HtmlBlockCloseHgroup
HtmlBlockOpenH1 = '<' Spnl ("h1" | "H1") Spnl HtmlAttribute* '>'
HtmlBlockCloseH1 = '<' Spnl '/' ("h1" | "H1") Spnl '>'
HtmlBlockH1 = HtmlBlockOpenH1 (HtmlBlockH1 | !HtmlBlockCloseH1 .)* HtmlBlockCloseH1
HtmlBlockOpenH2 = '<' Spnl ("h2" | "H2") Spnl HtmlAttribute* '>'
HtmlBlockCloseH2 = '<' Spnl '/' ("h2" | "H2") Spnl '>'
HtmlBlockH2 = HtmlBlockOpenH2 (HtmlBlockH2 | !HtmlBlockCloseH2 .)* HtmlBlockCloseH2
HtmlBlockOpenH3 = '<' Spnl ("h3" | "H3") Spnl HtmlAttribute* '>'
HtmlBlockCloseH3 = '<' Spnl '/' ("h3" | "H3") Spnl '>'
HtmlBlockH3 = HtmlBlockOpenH3 (HtmlBlockH3 | !HtmlBlockCloseH3 .)* HtmlBlockCloseH3
HtmlBlockOpenH4 = '<' Spnl ("h4" | "H4") Spnl HtmlAttribute* '>'
HtmlBlockCloseH4 = '<' Spnl '/' ("h4" | "H4") Spnl '>'
HtmlBlockH4 = HtmlBlockOpenH4 (HtmlBlockH4 | !HtmlBlockCloseH4 .)* HtmlBlockCloseH4
HtmlBlockOpenH5 = '<' Spnl ("h5" | "H5") Spnl HtmlAttribute* '>'
HtmlBlockCloseH5 = '<' Spnl '/' ("h5" | "H5") Spnl '>'
HtmlBlockH5 = HtmlBlockOpenH5 (HtmlBlockH5 | !HtmlBlockCloseH5 .)* HtmlBlockCloseH5
HtmlBlockOpenH6 = '<' Spnl ("h6" | "H6") Spnl HtmlAttribute* '>'
HtmlBlockCloseH6 = '<' Spnl '/' ("h6" | "H6") Spnl '>'
HtmlBlockH6 = HtmlBlockOpenH6 (HtmlBlockH6 | !HtmlBlockCloseH6 .)* HtmlBlockCloseH6
HtmlBlockOpenMenu = '<' Spnl ("menu" | "MENU") Spnl HtmlAttribute* '>'
HtmlBlockCloseMenu = '<' Spnl '/' ("menu" | "MENU") Spnl '>'
HtmlBlockMenu = HtmlBlockOpenMenu (HtmlBlockMenu | !HtmlBlockCloseMenu .)* HtmlBlockCloseMenu
HtmlBlockOpenNoframes = '<' Spnl ("noframes" | "NOFRAMES") Spnl HtmlAttribute* '>'
HtmlBlockCloseNoframes = '<' Spnl '/' ("noframes" | "NOFRAMES") Spnl '>'
HtmlBlockNoframes = HtmlBlockOpenNoframes (HtmlBlockNoframes | !HtmlBlockCloseNoframes .)* HtmlBlockCloseNoframes
HtmlBlockOpenNoscript = '<' Spnl ("noscript" | "NOSCRIPT") Spnl HtmlAttribute* '>'
HtmlBlockCloseNoscript = '<' Spnl '/' ("noscript" | "NOSCRIPT") Spnl '>'
HtmlBlockNoscript = HtmlBlockOpenNoscript (HtmlBlockNoscript | !HtmlBlockCloseNoscript .)* HtmlBlockCloseNoscript
HtmlBlockOpenOl = '<' Spnl ("ol" | "OL") Spnl HtmlAttribute* '>'
HtmlBlockCloseOl = '<' Spnl '/' ("ol" | "OL") Spnl '>'
HtmlBlockOl = HtmlBlockOpenOl (HtmlBlockOl | !HtmlBlockCloseOl .)* HtmlBlockCloseOl
HtmlBlockOpenP = '<' Spnl ("p" | "P") Spnl HtmlAttribute* '>'
HtmlBlockCloseP = '<' Spnl '/' ("p" | "P") Spnl '>'
HtmlBlockP = HtmlBlockOpenP (HtmlBlockP | !HtmlBlockCloseP .)* HtmlBlockCloseP
HtmlBlockOpenPre = '<' Spnl ("pre" | "PRE") Spnl HtmlAttribute* '>'
HtmlBlockClosePre = '<' Spnl '/' ("pre" | "PRE") Spnl '>'
HtmlBlockPre = HtmlBlockOpenPre (HtmlBlockPre | !HtmlBlockClosePre .)* HtmlBlockClosePre
HtmlBlockOpenProgress = '<' Spnl ("progress" | "PROGRESS") Spnl HtmlAttribute* '>'
HtmlBlockCloseProgress = '<' Spnl '/' ("progress" | "PROGRESS") Spnl '>'
HtmlBlockProgress = HtmlBlockOpenProgress (HtmlBlockProgress | !HtmlBlockCloseProgress .)* HtmlBlockCloseProgress
HtmlBlockOpenSection = '<' Spnl ("section" | "SECTION") Spnl HtmlAttribute* '>'
HtmlBlockCloseSection = '<' Spnl '/' ("section" | "SECTION") Spnl '>'
HtmlBlockSection = HtmlBlockOpenSection (HtmlBlockSection | !HtmlBlockCloseSection .)* HtmlBlockCloseSection
HtmlBlockOpenTable = '<' Spnl ("table" | "TABLE") Spnl HtmlAttribute* '>'
HtmlBlockCloseTable = '<' Spnl '/' ("table" | "TABLE") Spnl '>'
HtmlBlockTable = HtmlBlockOpenTable (HtmlBlockTable | !HtmlBlockCloseTable .)* HtmlBlockCloseTable
HtmlBlockOpenUl = '<' Spnl ("ul" | "UL") Spnl HtmlAttribute* '>'
HtmlBlockCloseUl = '<' Spnl '/' ("ul" | "UL") Spnl '>'
HtmlBlockUl = HtmlBlockOpenUl (HtmlBlockUl | !HtmlBlockCloseUl .)* HtmlBlockCloseUl
HtmlBlockOpenVideo = '<' Spnl ("video" | "VIDEO") Spnl HtmlAttribute* '>'
HtmlBlockCloseVideo = '<' Spnl '/' ("video" | "VIDEO") Spnl '>'
HtmlBlockVideo = HtmlBlockOpenVideo (HtmlBlockVideo | !HtmlBlockCloseVideo .)* HtmlBlockCloseVideo
HtmlBlockOpenDd = '<' Spnl ("dd" | "DD") Spnl HtmlAttribute* '>'
HtmlBlockCloseDd = '<' Spnl '/' ("dd" | "DD") Spnl '>'
HtmlBlockDd = HtmlBlockOpenDd (HtmlBlockDd | !HtmlBlockCloseDd .)* HtmlBlockCloseDd
HtmlBlockOpenDt = '<' Spnl ("dt" | "DT") Spnl HtmlAttribute* '>'
HtmlBlockCloseDt = '<' Spnl '/' ("dt" | "DT") Spnl '>'
HtmlBlockDt = HtmlBlockOpenDt (HtmlBlockDt | !HtmlBlockCloseDt .)* HtmlBlockCloseDt
HtmlBlockOpenFrameset = '<' Spnl ("frameset" | "FRAMESET") Spnl HtmlAttribute* '>'
HtmlBlockCloseFrameset = '<' Spnl '/' ("frameset" | "FRAMESET") Spnl '>'
HtmlBlockFrameset = HtmlBlockOpenFrameset (HtmlBlockFrameset | !HtmlBlockCloseFrameset .)* HtmlBlockCloseFrameset
HtmlBlockOpenLi = '<' Spnl ("li" | "LI") Spnl HtmlAttribute* '>'
HtmlBlockCloseLi = '<' Spnl '/' ("li" | "LI") Spnl '>'
HtmlBlockLi = HtmlBlockOpenLi (HtmlBlockLi | !HtmlBlockCloseLi .)* HtmlBlockCloseLi
HtmlBlockOpenTbody = '<' Spnl ("tbody" | "TBODY") Spnl HtmlAttribute* '>'
HtmlBlockCloseTbody = '<' Spnl '/' ("tbody" | "TBODY") Spnl '>'
HtmlBlockTbody = HtmlBlockOpenTbody (HtmlBlockTbody | !HtmlBlockCloseTbody .)* HtmlBlockCloseTbody
HtmlBlockOpenTd = '<' Spnl ("td" | "TD") Spnl HtmlAttribute* '>'
HtmlBlockCloseTd = '<' Spnl '/' ("td" | "TD") Spnl '>'
HtmlBlockTd = HtmlBlockOpenTd (HtmlBlockTd | !HtmlBlockCloseTd .)* HtmlBlockCloseTd
HtmlBlockOpenTfoot = '<' Spnl ("tfoot" | "TFOOT") Spnl HtmlAttribute* '>'
HtmlBlockCloseTfoot = '<' Spnl '/' ("tfoot" | "TFOOT") Spnl '>'
HtmlBlockTfoot = HtmlBlockOpenTfoot (HtmlBlockTfoot | !HtmlBlockCloseTfoot .)* HtmlBlockCloseTfoot
HtmlBlockOpenTh = '<' Spnl ("th" | "TH") Spnl HtmlAttribute* '>'
HtmlBlockCloseTh = '<' Spnl '/' ("th" | "TH") Spnl '>'
HtmlBlockTh = HtmlBlockOpenTh (HtmlBlockTh | !HtmlBlockCloseTh .)* HtmlBlockCloseTh
HtmlBlockOpenThead = '<' Spnl ("thead" | "THEAD") Spnl HtmlAttribute* '>'
HtmlBlockCloseThead = '<' Spnl '/' ("thead" | "THEAD") Spnl '>'
HtmlBlockThead = HtmlBlockOpenThead (HtmlBlockThead | !HtmlBlockCloseThead .)* HtmlBlockCloseThead
HtmlBlockOpenTr = '<' Spnl ("tr" | "TR") Spnl HtmlAttribute* '>'
HtmlBlockCloseTr = '<' Spnl '/' ("tr" | "TR") Spnl '>'
HtmlBlockTr = HtmlBlockOpenTr (HtmlBlockTr | !HtmlBlockCloseTr .)* HtmlBlockCloseTr
HtmlBlockOpenScript = '<' Spnl ("script" | "SCRIPT") Spnl HtmlAttribute* '>'
HtmlBlockCloseScript = '<' Spnl '/' ("script" | "SCRIPT") Spnl '>'
HtmlBlockScript = HtmlBlockOpenScript (!HtmlBlockCloseScript .)* HtmlBlockCloseScript
HtmlBlockOpenHead = '<' Spnl ("head" | "HEAD") Spnl HtmlAttribute* '>'
HtmlBlockCloseHead = '<' Spnl '/' ("head" | "HEAD") Spnl '>'
HtmlBlockHead = HtmlBlockOpenHead (!HtmlBlockCloseHead .)* HtmlBlockCloseHead
HtmlBlockOpenMain = '<' Spnl ("main" | "MAIN") Spnl HtmlAttribute* '>'
HtmlBlockCloseMain = '<' Spnl '/' ("main" | "MAIN") Spnl '>'
HtmlBlockMain = HtmlBlockOpenMain (!HtmlBlockCloseMain .)* HtmlBlockCloseMain
HtmlBlockOpenNav = '<' Spnl ("nav" | "NAV") Spnl HtmlAttribute* '>'