forked from KolibriOS/kolibrios
211 lines
7.3 KiB
Plaintext
211 lines
7.3 KiB
Plaintext
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Expanded grammar rules
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======================
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This file provides a fully-expanded version of (a slightly modified)
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forward-compatible CSS grammar. See CSS3 Syntax $4.3.2 for the compact version.
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start -> ws stylesheet EOF
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stylesheet -> CDO ws stylesheet
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stylesheet -> CDC ws stylesheet
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stylesheet -> statement stylesheet
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stylesheet ->
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statement -> ruleset
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statement -> at-rule
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ruleset -> selector '{' ws ruleset-end
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ruleset -> '{' ws ruleset-end
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ruleset-end -> declaration decl-list '}' ws
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ruleset-end -> decl-list '}' ws
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at-rule -> ATKEYWORD ws any0 at-rule-end
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at-rule-end -> block
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at-rule-end -> ';' ws
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block -> '{' ws block-content '}' ws
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block-content -> any block-content
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block-content -> block block-content
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block-content -> ATKEYWORD ws block-content
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block-content -> ';' ws block-content
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block-content ->
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selector -> any1
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declaration -> property ':' ws value1
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decl-list -> ';' ws decl-list-end
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decl-list ->
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decl-list-end -> declaration decl-list
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decl-list-end -> decl-list
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property -> IDENT ws
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value0 -> value value0
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value0 ->
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value1 -> value value0
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value -> any
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value -> block
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value -> ATKEYWORD ws
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any0 -> any any0
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any0 ->
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any1 -> any any0
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any -> IDENT ws
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any -> NUMBER ws
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any -> PERCENTAGE ws
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any -> DIMENSION ws
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any -> STRING ws
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any -> CHAR ws
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any -> URI ws
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any -> HASH ws
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any -> UNICODE-RANGE ws
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any -> INCLUDES ws
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any -> DASHMATCH ws
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any -> PREFIXMATCH ws
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any -> SUFFIXMATCH ws
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any -> SUBSTRINGMATCH ws
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any -> FUNCTION ws any0 ')' ws
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any -> '(' ws any0 ')' ws
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any -> '[' ws any0 ']' ws
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ws -> S ws
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ws ->
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Differences from the specification
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----------------------------------
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1) The start non-terminal has been introduced. It eats any leading whitespace
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and handles EOF.
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2) The "stylesheet -> S stylesheet" production has been removed.
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3) The "stylesheet -> CDO stylesheet" production has been changed to
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"stylesheet -> CDO ws stylesheet".
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4) The "stylesheet -> CDC stylesheet" production has been changed to
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"stylesheet -> CDC ws stylesheet".
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Essentially, the above changes remove the expectation of leading whitespace
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from the stylesheet non-terminal. This is handled by either the start
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non-terminal, or by the changes made to the production rules for the stylesheet
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non-terminal. Note that the "stylesheet -> statement stylesheet" production
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does not require modification as the statement production rule already consumes
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any whitespace following the statement.
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If '{', '}', '[', ']', '(', ')', and ';' are omitted from any, then the above
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grammar is LL(1).
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Nullable productions
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--------------------
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stylesheet, block-content, decl-list, decl-list-end, value0, any0, ws
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FIRST sets
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----------
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start CDO, CDC, S, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING,
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CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH,
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PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(',
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'[', '{', ATKEYWORD, EOF
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stylesheet CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING,
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CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH,
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PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(',
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'[', '{', ATKEYWORD
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statement IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH,
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UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH,
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SUBSTRINGMATCH, FUNCTION, '(', '[', '{', ATKEYWORD
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ruleset IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH,
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UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH,
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SUBSTRINGMATCH, FUNCTION, '(', '[', '{'
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ruleset-end IDENT, ';'
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at-rule ATKEYWORD
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at-rule-end '{', ';'
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block '{'
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block-content IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH,
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UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH,
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SUBSTRINGMATCH, FUNCTION, '(', '[', '{', ATKEYWORD, ';'
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selector IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH,
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UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH,
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SUBSTRINGMATCH, FUNCTION, '(', '['
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declaration IDENT
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decl-list ';', '}'
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decl-list-end IDENT, ';', '}'
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property IDENT
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value0 IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH,
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UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH,
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SUBSTRINGMATCH, FUNCTION, '(', '[', '{', ATKEYWORD
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value1 IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH,
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UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH,
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SUBSTRINGMATCH, FUNCTION, '(', '[', '{', ATKEYWORD
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value IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH,
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UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH,
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SUBSTRINGMATCH, FUNCTION, '(', '[', '{', ATKEYWORD
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any0 IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH,
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UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH,
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SUBSTRINGMATCH, FUNCTION, '(', '['
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any1 IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH,
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UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH,
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SUBSTRINGMATCH, FUNCTION, '(', '['
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any IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH,
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UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH,
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SUBSTRINGMATCH, FUNCTION, '(', '['
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ws S
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FOLLOW sets
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-----------
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start
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stylesheet EOF
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statement CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING,
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CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH,
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PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(',
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'[', '{', ATKEYWORD, EOF
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ruleset CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING,
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CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH,
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PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(',
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'[', '{', ATKEYWORD, EOF
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ruleset-end CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING,
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CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH,
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PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(',
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'[', '{', ATKEYWORD, EOF
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at-rule CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING,
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CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH,
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PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(',
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'[', '{', ATKEYWORD, EOF
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at-rule-end CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING,
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CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH,
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PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(',
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'[', '{', ATKEYWORD, EOF
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block CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING,
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CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH,
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PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(',
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'[', '{', ATKEYWORD, EOF, ';', '}'
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block-content '}'
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selector '{'
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declaration ';', '}'
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decl-list '}'
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decl-list-end '}'
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property ':'
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value0 ';', '}'
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value1 ';', '}'
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value IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH,
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UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH,
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SUBSTRINGMATCH, FUNCTION, '(', '[', '{', ATKEYWORD, ';', '}'
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any0 '{', ';', ')', ']'
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any1 '{'
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any IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH,
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UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH,
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SUBSTRINGMATCH, FUNCTION, '(', '[', '{', ';', ATKEYWORD, '}'
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ws CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING,
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CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH,
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PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(',
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'[', '{', ATKEYWORD, EOF, ';', '}', ':'
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