211 lines
7.3 KiB
Plaintext
211 lines
7.3 KiB
Plaintext
|
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, ';', '}', ':'
|
||
|
|
|
||
|
|
|