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