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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 3584 | sourcerer | 1 | Expanded grammar rules |
| 2 | ====================== |
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| 3 | |||
| 4 | This file provides a fully-expanded version of (a slightly modified) |
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| 5 | forward-compatible CSS grammar. See CSS3 Syntax $4.3.2 for the compact version. |
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| 6 | |||
| 7 | start -> ws stylesheet EOF |
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| 8 | |||
| 9 | stylesheet -> CDO ws stylesheet |
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| 10 | stylesheet -> CDC ws stylesheet |
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| 11 | stylesheet -> statement stylesheet |
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| 12 | stylesheet -> |
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| 13 | |||
| 14 | statement -> ruleset |
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| 15 | statement -> at-rule |
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| 16 | |||
| 17 | ruleset -> selector '{' ws ruleset-end |
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| 18 | ruleset -> '{' ws ruleset-end |
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| 19 | |||
| 20 | ruleset-end -> declaration decl-list '}' ws |
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| 21 | ruleset-end -> decl-list '}' ws |
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| 22 | |||
| 23 | at-rule -> ATKEYWORD ws any0 at-rule-end |
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| 24 | |||
| 25 | at-rule-end -> block |
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| 26 | at-rule-end -> ';' ws |
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| 27 | |||
| 28 | block -> '{' ws block-content '}' ws |
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| 29 | |||
| 30 | block-content -> any block-content |
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| 31 | block-content -> block block-content |
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| 32 | block-content -> ATKEYWORD ws block-content |
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| 33 | block-content -> ';' ws block-content |
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| 34 | block-content -> |
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| 35 | |||
| 36 | selector -> any1 |
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| 37 | |||
| 38 | declaration -> property ':' ws value1 |
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| 39 | |||
| 40 | decl-list -> ';' ws decl-list-end |
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| 41 | decl-list -> |
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| 42 | |||
| 43 | decl-list-end -> declaration decl-list |
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| 44 | decl-list-end -> decl-list |
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| 45 | |||
| 46 | property -> IDENT ws |
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| 47 | |||
| 48 | value0 -> value value0 |
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| 49 | value0 -> |
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| 50 | |||
| 51 | value1 -> value value0 |
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| 52 | |||
| 53 | value -> any |
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| 54 | value -> block |
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| 55 | value -> ATKEYWORD ws |
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| 56 | |||
| 57 | any0 -> any any0 |
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| 58 | any0 -> |
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| 59 | |||
| 60 | any1 -> any any0 |
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| 61 | |||
| 62 | any -> IDENT ws |
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| 63 | any -> NUMBER ws |
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| 64 | any -> PERCENTAGE ws |
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| 65 | any -> DIMENSION ws |
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| 66 | any -> STRING ws |
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| 67 | any -> CHAR ws |
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| 68 | any -> URI ws |
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| 69 | any -> HASH ws |
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| 70 | any -> UNICODE-RANGE ws |
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| 71 | any -> INCLUDES ws |
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| 72 | any -> DASHMATCH ws |
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| 73 | any -> PREFIXMATCH ws |
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| 74 | any -> SUFFIXMATCH ws |
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| 75 | any -> SUBSTRINGMATCH ws |
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| 76 | any -> FUNCTION ws any0 ')' ws |
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| 77 | any -> '(' ws any0 ')' ws |
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| 78 | any -> '[' ws any0 ']' ws |
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| 79 | |||
| 80 | ws -> S ws |
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| 81 | ws -> |
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| 82 | |||
| 83 | Differences from the specification |
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| 84 | ---------------------------------- |
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| 85 | |||
| 86 | 1) The start non-terminal has been introduced. It eats any leading whitespace |
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| 87 | and handles EOF. |
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| 88 | 2) The "stylesheet -> S stylesheet" production has been removed. |
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| 89 | 3) The "stylesheet -> CDO stylesheet" production has been changed to |
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| 90 | "stylesheet -> CDO ws stylesheet". |
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| 91 | 4) The "stylesheet -> CDC stylesheet" production has been changed to |
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| 92 | "stylesheet -> CDC ws stylesheet". |
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| 93 | |||
| 94 | Essentially, the above changes remove the expectation of leading whitespace |
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| 95 | from the stylesheet non-terminal. This is handled by either the start |
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| 96 | non-terminal, or by the changes made to the production rules for the stylesheet |
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| 97 | non-terminal. Note that the "stylesheet -> statement stylesheet" production |
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| 98 | does not require modification as the statement production rule already consumes |
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| 99 | any whitespace following the statement. |
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| 100 | |||
| 101 | If '{', '}', '[', ']', '(', ')', and ';' are omitted from any, then the above |
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| 102 | grammar is LL(1). |
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| 103 | |||
| 104 | Nullable productions |
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| 105 | -------------------- |
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| 106 | |||
| 107 | stylesheet, block-content, decl-list, decl-list-end, value0, any0, ws |
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| 108 | |||
| 109 | FIRST sets |
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| 110 | ---------- |
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| 111 | |||
| 112 | start CDO, CDC, S, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, |
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| 113 | CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH, |
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| 114 | PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(', |
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| 115 | '[', '{', ATKEYWORD, EOF |
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| 116 | stylesheet CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, |
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| 117 | CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH, |
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| 118 | PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(', |
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| 119 | '[', '{', ATKEYWORD |
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| 120 | statement IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH, |
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| 121 | UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH, |
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| 122 | SUBSTRINGMATCH, FUNCTION, '(', '[', '{', ATKEYWORD |
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| 123 | ruleset IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH, |
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| 124 | UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH, |
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| 125 | SUBSTRINGMATCH, FUNCTION, '(', '[', '{' |
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| 126 | ruleset-end IDENT, ';' |
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| 127 | at-rule ATKEYWORD |
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| 128 | at-rule-end '{', ';' |
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| 129 | block '{' |
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| 130 | block-content IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH, |
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| 131 | UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH, |
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| 132 | SUBSTRINGMATCH, FUNCTION, '(', '[', '{', ATKEYWORD, ';' |
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| 133 | selector IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH, |
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| 134 | UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH, |
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| 135 | SUBSTRINGMATCH, FUNCTION, '(', '[' |
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| 136 | declaration IDENT |
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| 137 | decl-list ';', '}' |
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| 138 | decl-list-end IDENT, ';', '}' |
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| 139 | property IDENT |
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| 140 | value0 IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH, |
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| 141 | UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH, |
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| 142 | SUBSTRINGMATCH, FUNCTION, '(', '[', '{', ATKEYWORD |
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| 143 | value1 IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH, |
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| 144 | UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH, |
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| 145 | SUBSTRINGMATCH, FUNCTION, '(', '[', '{', ATKEYWORD |
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| 146 | value IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH, |
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| 147 | UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH, |
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| 148 | SUBSTRINGMATCH, FUNCTION, '(', '[', '{', ATKEYWORD |
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| 149 | any0 IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH, |
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| 150 | UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH, |
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| 151 | SUBSTRINGMATCH, FUNCTION, '(', '[' |
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| 152 | any1 IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH, |
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| 153 | UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH, |
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| 154 | SUBSTRINGMATCH, FUNCTION, '(', '[' |
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| 155 | any IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH, |
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| 156 | UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH, |
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| 157 | SUBSTRINGMATCH, FUNCTION, '(', '[' |
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| 158 | ws S |
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| 159 | |||
| 160 | FOLLOW sets |
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| 161 | ----------- |
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| 162 | |||
| 163 | start |
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| 164 | stylesheet EOF |
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| 165 | statement CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, |
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| 166 | CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH, |
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| 167 | PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(', |
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| 168 | '[', '{', ATKEYWORD, EOF |
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| 169 | ruleset CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, |
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| 170 | CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH, |
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| 171 | PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(', |
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| 172 | '[', '{', ATKEYWORD, EOF |
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| 173 | ruleset-end CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, |
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| 174 | CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH, |
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| 175 | PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(', |
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| 176 | '[', '{', ATKEYWORD, EOF |
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| 177 | at-rule CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, |
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| 178 | CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH, |
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| 179 | PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(', |
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| 180 | '[', '{', ATKEYWORD, EOF |
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| 181 | at-rule-end CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, |
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| 182 | CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH, |
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| 183 | PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(', |
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| 184 | '[', '{', ATKEYWORD, EOF |
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| 185 | block CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, |
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| 186 | CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH, |
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| 187 | PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(', |
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| 188 | '[', '{', ATKEYWORD, EOF, ';', '}' |
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| 189 | block-content '}' |
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| 190 | selector '{' |
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| 191 | declaration ';', '}' |
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| 192 | decl-list '}' |
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| 193 | decl-list-end '}' |
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| 194 | property ':' |
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| 195 | value0 ';', '}' |
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| 196 | value1 ';', '}' |
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| 197 | value IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH, |
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| 198 | UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH, |
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| 199 | SUBSTRINGMATCH, FUNCTION, '(', '[', '{', ATKEYWORD, ';', '}' |
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| 200 | any0 '{', ';', ')', ']' |
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| 201 | any1 '{' |
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| 202 | any IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, CHAR, URI, HASH, |
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| 203 | UNICODE-RANGE, INCLUDES, DASHMATCH, PREFIXMATCH, SUFFIXMATCH, |
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| 204 | SUBSTRINGMATCH, FUNCTION, '(', '[', '{', ';', ATKEYWORD, '}' |
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| 205 | ws CDO, CDC, IDENT, NUMBER, PERCENTAGE, DIMENSION, STRING, |
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| 206 | CHAR, URI, HASH, UNICODE-RANGE, INCLUDES, DASHMATCH, |
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| 207 | PREFIXMATCH, SUFFIXMATCH, SUBSTRINGMATCH, FUNCTION, '(', |
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| 208 | '[', '{', ATKEYWORD, EOF, ';', '}', ':' |
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| 209 |