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-- Parser for CSS 2.1
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-- See CSS 2.1 G.2
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{
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module Parser where
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import Tokeniser
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import CSS
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}
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%name parser
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%tokentype { Token }
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%token
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INCLUDES { INCLUDES }
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DASHMATCH { DASHMATCH }
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LBRACE { LBRACE }
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PLUS { PLUS }
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GREATER { GREATER }
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COMMA { COMMA }
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STRING { STRING $$ }
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IDENT { IDENT $$ }
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HASH { HASH $$ }
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IMPORT_SYM { IMPORT_SYM }
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PAGE_SYM { PAGE_SYM }
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MEDIA_SYM { MEDIA_SYM }
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CHARSET_SYM { CHARSET_SYM }
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IMPORTANT_SYM { IMPORTANT_SYM }
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EMS { EMS $$ }
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EXS { EXS $$ }
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LENGTH { LENGTH $$ }
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ANGLE { ANGLE $$ }
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TIME { TIME $$ }
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FREQ { FREQ $$ }
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DIMEN { DIMEN $$ }
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PERCENTAGE { PERCENTAGE $$ }
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NUMBER { NUMBER $$ }
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URI { URI $$ }
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FUNCTION { FUNCTION $$ }
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DELIM { DELIM $$ }
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SEMI { SEMI }
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RBRACE { RBRACE }
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COLON { COLON }
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SLASH { SLASH }
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MINUS { MINUS }
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DOT { DOT }
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LBRAC { LBRAC }
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RBRAC { RBRAC }
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ASTERISK { ASTERISK }
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EQUALS { EQUALS }
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RPAREN { RPAREN }
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%%
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stylesheet :: { Stylesheet }
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: charset import_list statement_list { Stylesheet $1 $2 $3 }
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charset :: { Maybe String }
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: { Nothing }
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| CHARSET_SYM STRING SEMI { Just $2 }
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import_list :: { [(String, [String])] }
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: { [] }
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| import_list import { $2 : $1 }
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import :: { (String, [String]) }
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: IMPORT_SYM STRING medium_list SEMI { ($2, $3) }
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| IMPORT_SYM URI medium_list SEMI { ($2, $3) }
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statement_list :: { [Statement] }
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: { [] }
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| statement_list statement { $2 : $1 }
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statement :: { Statement }
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: ruleset { $1 }
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| media { $1 }
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| page { $1 }
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medium_list :: { [String] }
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: { [] }
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| medium_list_1 { $1 }
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medium_list_1 :: { [String] }
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: medium { [$1] }
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| medium_list_1 COMMA medium { $3 : $1 }
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media :: { Statement }
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: MEDIA_SYM medium_list_1 LBRACE ruleset_list RBRACE
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{ Media $2 $4 }
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medium :: { String }
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: IDENT { $1 }
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ruleset_list :: { [Statement] }
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: { [] }
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| ruleset_list ruleset { $2 : $1 }
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page :: { Statement }
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: PAGE_SYM LBRACE declaration_list_1 RBRACE
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{ Page Nothing $3 }
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| PAGE_SYM pseudo_page LBRACE declaration_list_1 RBRACE
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{ Page (Just $2) $4 }
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declaration_list_1 :: { [Declaration] }
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: { [] }
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| declaration { [$1] }
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| declaration_list_1 SEMI { $1 }
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| declaration_list_1 SEMI declaration { $3 : $1 }
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pseudo_page :: { String }
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: COLON IDENT { $2 }
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ruleset :: { Statement }
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: selector_list_1 LBRACE declaration_list_1 RBRACE
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{ Ruleset $1 $3 }
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selector_list_1 :: { [Selector] }
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: selector { [$1] }
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| selector_list_1 COMMA selector { $3 : $1 }
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selector :: { Selector }
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: simple_selector { [($1, NoMore)] }
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| simple_selector combinator selector { ($1, $2) : $3 }
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combinator :: { Combinator }
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: { Ancestor }
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| PLUS { Preceded }
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| GREATER { Parent }
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simple_selector :: { SimpleSelector }
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: element_name detail_list_1 { ($1, $2) }
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| element_name { ($1, []) }
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| detail_list_1 { (Nothing, $1) }
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element_name :: { Maybe String }
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: IDENT { Just $1 }
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| ASTERISK { Nothing }
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detail_list_1 :: { [Detail] }
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: HASH { [Id $1] }
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| class { [$1] }
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| attrib { [$1] }
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| pseudo { [$1] }
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| detail_list_1 HASH { Id $2 : $1 }
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| detail_list_1 class { $2 : $1 }
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| detail_list_1 attrib { $2 : $1 }
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| detail_list_1 pseudo { $2 : $1 }
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class :: { Detail }
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: DOT IDENT { Class $2 }
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attrib :: { Detail }
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: LBRAC IDENT RBRAC { Attrib $2 }
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| LBRAC IDENT EQUALS IDENT RBRAC { AttribEq $2 $4 }
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| LBRAC IDENT EQUALS STRING RBRAC { AttribEq $2 $4 }
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| LBRAC IDENT INCLUDES IDENT RBRAC { AttribInc $2 $4 }
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| LBRAC IDENT INCLUDES STRING RBRAC { AttribInc $2 $4 }
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| LBRAC IDENT DASHMATCH IDENT RBRAC { AttribDM $2 $4 }
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| LBRAC IDENT DASHMATCH STRING RBRAC { AttribDM $2 $4 }
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pseudo :: { Detail }
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: COLON IDENT { Pseudo $2 }
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| COLON FUNCTION RPAREN { PseudoFunc $2 "" }
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| COLON FUNCTION IDENT RPAREN { PseudoFunc $2 $3 }
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declaration :: { Declaration }
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: property COLON value_list_1 { ($1, $3, False) }
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| property COLON value_list_1 prio { ($1, $3, True) }
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property :: { String }
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: IDENT { $1 }
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prio :: { Bool }
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: IMPORTANT_SYM { True }
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value_list :: { [Value] }
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: { [] }
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| value value_list { $1 : $2 }
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value_list_1 :: { [Value] }
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: value { [$1] }
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| value value_list_1 { $1 : $2 }
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value :: { Value }
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: NUMBER { Number $1 }
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| PERCENTAGE { Percentage $1 }
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| LENGTH { Length $1 }
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| EMS { Ems $1 }
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| EXS { Exs $1 }
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| ANGLE { Angle $1 }
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| TIME { Time $1 }
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| FREQ { Freq $1 }
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| STRING { StringV $1 }
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| IDENT { Ident $1 }
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| URI { Uri $1 }
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| HASH { HexColour $1 }
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| SLASH { Slash }
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| COMMA { Comma }
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| FUNCTION value_list RPAREN { Function $1 $2 }
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{
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happyError :: [Token] -> a
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happyError _ = error "Parse error"
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}
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