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parser.jison
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/* description: Parses expressions. */
/* lexical grammar */
%lex
%%
\s+ /* skip whitespace */
"true" return 'BOOL';
"TRUE" return 'BOOL';
"false" return 'BOOL';
"FALSE" return 'BOOL';
"AND" return 'OP';
"and" yytext = yytext.toUpperCase(); return 'OP';
"OR" return 'OP';
"or" yytext = yytext.toUpperCase(); return 'OP';
"NOT" return 'NOT';
"not" yytext = yytext.toUpperCase(); return 'NOT';
"*" return 'MUL';
"/" return 'DIV';
"+" return 'ADD';
"-" return 'SUB';
rgb\(\s*[0-9]+\%?\s*\,\s*[0-9]+\%?\s*\,\s*[0-9]+\%?\s*\) return 'COLOR';
hsl\(\s*[0-9]+\s*\,\s*[0-9]+\%\s*\,\s*[0-9]+\%\s*\) return 'COLOR';
rgba\(\s*[0-9]+\%?\s*\,\s*[0-9]+\%?\s*\,\s*[0-9]+\%?\s*\,\s*([0-1]|0?\.[0-9]+)\s*\) return 'COLOR';
hsla\(\s*[0-9]+\s*\,\s*[0-9]+\%\s*\,\s*[0-9]+\%\s*\,\s*([0-1]|0?\.[0-9]+)\s*\) return 'COLOR';
\#[0-9a-fA-F]{6}([0-9a-fA-F]{2})?\b return 'COLOR';
\#[0-9a-fA-F]{3}([0-9a-fA-F])?\b return 'COLOR';
"aliceblue" return 'COLOR';
"antiquewhite" return 'COLOR';
"aqua" return 'COLOR';
"aquamarine" return 'COLOR';
"azure" return 'COLOR';
"beige" return 'COLOR';
"bisque" return 'COLOR';
"black" return 'COLOR';
"blanchedalmond" return 'COLOR';
"blue" return 'COLOR';
"blueviolet" return 'COLOR';
"brown" return 'COLOR';
"burlywood" return 'COLOR';
"cadetblue" return 'COLOR';
"chartreuse" return 'COLOR';
"chocolate" return 'COLOR';
"coral" return 'COLOR';
"cornflowerblue" return 'COLOR';
"cornsilk" return 'COLOR';
"crimson" return 'COLOR';
"cyan" return 'COLOR';
"darkblue" return 'COLOR';
"darkcyan" return 'COLOR';
"darkgoldenrod" return 'COLOR';
"darkgray" return 'COLOR';
"darkgreen" return 'COLOR';
"darkgrey" return 'COLOR';
"darkkhaki" return 'COLOR';
"darkmagenta" return 'COLOR';
"darkolivegreen" return 'COLOR';
"darkorange" return 'COLOR';
"darkorchid" return 'COLOR';
"darkred" return 'COLOR';
"darksalmon" return 'COLOR';
"darkseagreen" return 'COLOR';
"darkslateblue" return 'COLOR';
"darkslategray" return 'COLOR';
"darkslategrey" return 'COLOR';
"darkturquoise" return 'COLOR';
"darkviolet" return 'COLOR';
"deeppink" return 'COLOR';
"deepskyblue" return 'COLOR';
"dimgray" return 'COLOR';
"dimgrey" return 'COLOR';
"dodgerblue" return 'COLOR';
"firebrick" return 'COLOR';
"floralwhite" return 'COLOR';
"forestgreen" return 'COLOR';
"fuchsia" return 'COLOR';
"gainsboro" return 'COLOR';
"ghostwhite" return 'COLOR';
"gold" return 'COLOR';
"goldenrod" return 'COLOR';
"gray" return 'COLOR';
"green" return 'COLOR';
"greenyellow" return 'COLOR';
"grey" return 'COLOR';
"honeydew" return 'COLOR';
"hotpink" return 'COLOR';
"indianred" return 'COLOR';
"indigo" return 'COLOR';
"ivory" return 'COLOR';
"khaki" return 'COLOR';
"lavender" return 'COLOR';
"lavenderblush" return 'COLOR';
"lawngreen" return 'COLOR';
"lemonchiffon" return 'COLOR';
"lightblue" return 'COLOR';
"lightcoral" return 'COLOR';
"lightcyan" return 'COLOR';
"lightgoldenrodyellow" return 'COLOR';
"lightgray" return 'COLOR';
"lightgreen" return 'COLOR';
"lightgrey" return 'COLOR';
"lightpink" return 'COLOR';
"lightsalmon" return 'COLOR';
"lightseagreen" return 'COLOR';
"lightskyblue" return 'COLOR';
"lightslategray" return 'COLOR';
"lightslategrey" return 'COLOR';
"lightsteelblue" return 'COLOR';
"lightyellow" return 'COLOR';
"lime" return 'COLOR';
"limegreen" return 'COLOR';
"linen" return 'COLOR';
"magenta" return 'COLOR';
"maroon" return 'COLOR';
"mediumaquamarine" return 'COLOR';
"mediumblue" return 'COLOR';
"mediumorchid" return 'COLOR';
"mediumpurple" return 'COLOR';
"mediumseagreen" return 'COLOR';
"mediumslateblue" return 'COLOR';
"mediumspringgreen" return 'COLOR';
"mediumturquoise" return 'COLOR';
"mediumvioletred" return 'COLOR';
"midnightblue" return 'COLOR';
"mintcream" return 'COLOR';
"mistyrose" return 'COLOR';
"moccasin" return 'COLOR';
"navajowhite" return 'COLOR';
"navy" return 'COLOR';
"oldlace" return 'COLOR';
"olive" return 'COLOR';
"olivedrab" return 'COLOR';
"orange" return 'COLOR';
"orangered" return 'COLOR';
"orchid" return 'COLOR';
"palegoldenrod" return 'COLOR';
"palegreen" return 'COLOR';
"paleturquoise" return 'COLOR';
"palevioletred" return 'COLOR';
"papayawhip" return 'COLOR';
"peachpuff" return 'COLOR';
"peru" return 'COLOR';
"pink" return 'COLOR';
"plum" return 'COLOR';
"powderblue" return 'COLOR';
"purple" return 'COLOR';
"rebeccapurple" return 'COLOR';
"red" return 'COLOR';
"rosybrown" return 'COLOR';
"royalblue" return 'COLOR';
"saddlebrown" return 'COLOR';
"salmon" return 'COLOR';
"sandybrown" return 'COLOR';
"seagreen" return 'COLOR';
"seashell" return 'COLOR';
"sienna" return 'COLOR';
"silver" return 'COLOR';
"skyblue" return 'COLOR';
"slateblue" return 'COLOR';
"slategray" return 'COLOR';
"slategrey" return 'COLOR';
"snow" return 'COLOR';
"springgreen" return 'COLOR';
"steelblue" return 'COLOR';
"tan" return 'COLOR';
"teal" return 'COLOR';
"thistle" return 'COLOR';
"tomato" return 'COLOR';
"turquoise" return 'COLOR';
"violet" return 'COLOR';
"wheat" return 'COLOR';
"white" return 'COLOR';
"whitesmoke" return 'COLOR';
"yellow" return 'COLOR';
"yellowgreen" return 'COLOR';
[0-9]+("."[0-9]+)?px\b return 'LENGTH';
[0-9]+("."[0-9]+)?cm\b return 'LENGTH';
[0-9]+("."[0-9]+)?mm\b return 'LENGTH';
[0-9]+("."[0-9]+)?in\b return 'LENGTH';
[0-9]+("."[0-9]+)?pt\b return 'LENGTH';
[0-9]+("."[0-9]+)?pc\b return 'LENGTH';
[0-9]+("."[0-9]+)?deg\b return 'ANGLE';
[0-9]+("."[0-9]+)?grad\b return 'ANGLE';
[0-9]+("."[0-9]+)?rad\b return 'ANGLE';
[0-9]+("."[0-9]+)?turn\b return 'ANGLE';
[0-9]+("."[0-9]+)?s\b return 'TIME';
[0-9]+("."[0-9]+)?ms\b return 'TIME';
[0-9]+("."[0-9]+)?Hz\b return 'FREQ';
[0-9]+("."[0-9]+)?kHz\b return 'FREQ';
[0-9]+("."[0-9]+)?dpi\b return 'RES';
[0-9]+("."[0-9]+)?dpcm\b return 'RES';
[0-9]+("."[0-9]+)?dppx\b return 'RES';
[0-9]+("."[0-9]+)?em\b return 'EMS';
[0-9]+("."[0-9]+)?ex\b return 'EXS';
[0-9]+("."[0-9]+)?ch\b return 'CHS';
[0-9]+("."[0-9]+)?rem\b return 'REMS';
[0-9]+("."[0-9]+)?vw\b return 'VHS';
[0-9]+("."[0-9]+)?vh\b return 'VWS';
[0-9]+("."[0-9]+)?vmin\b return 'VMINS';
[0-9]+("."[0-9]+)?vmax\b return 'VMAXS';
[0-9]+("."[0-9]+)?\% return 'PERCENTAGE';
[0-9]+("."[0-9]+)?\b return 'NUMBER';
[a-zA-Z0-9-_.]+\b return 'STRING';
\'(\\[^\']|[^\'\\])*\' yytext = yytext.slice(1,-1); return 'STRING';
\"(\\[^\"]|[^\"\\])*\" yytext = yytext.slice(1,-1); return 'STRING';
"(" return 'LPAREN';
")" return 'RPAREN';
"==" return 'RELOP';
"!=" return 'RELOP';
">=" return 'RELOP';
">" return 'RELOP';
"<=" return 'RELOP';
"<" return 'RELOP';
<<EOF>> return 'EOF';
/lex
%left ADD SUB
%left MUL DIV
%left OP
%left NOT
%left STRING
%left RELOP
%left UPREC
%start expression
%%
expression
: expr EOF { return $1; }
;
expr
: logical_expression { $$ = $1; }
| LPAREN logical_expression RPAREN { $$ = $2; }
| binary_expression { $$ = $1; }
| LPAREN binary_expression RPAREN { $$ = $2; }
| unary_expression { $$ = $1; }
| LPAREN unary_expression RPAREN { $$ = $2; }
| math_expression { $$ = $1; }
| bool_value { $$ = $1; }
| string { $$ = $1; }
;
binary_expression
: expr RELOP expr %prec UPREC { $$ = { type: 'BinaryExpression', operator: $2, left: $1, right: $3 }; }
;
unary_expression
: NOT css_value { $$ = { type: 'UnaryExpression', operator: $1, argument: $2 }; }
| NOT value { $$ = { type: 'UnaryExpression', operator: $1, argument: $2 }; }
| NOT string { $$ = { type: 'UnaryExpression', operator: $1, argument: $2 }; }
| NOT LPAREN expr RPAREN { $$ = { type: 'UnaryExpression', operator: $1, argument: $3 }; }
;
logical_expression
: expr OP expr { $$ = { type: 'LogicalExpression', operator: $2, left: $1, right: $3 }; }
;
math_expression
: math_expression ADD math_expression { $$ = { type: 'MathematicalExpression', operator: $2, left: $1, right: $3 }; }
| math_expression SUB math_expression { $$ = { type: 'MathematicalExpression', operator: $2, left: $1, right: $3 }; }
| math_expression MUL math_expression { $$ = { type: 'MathematicalExpression', operator: $2, left: $1, right: $3 }; }
| math_expression DIV math_expression { $$ = { type: 'MathematicalExpression', operator: $2, left: $1, right: $3 }; }
| LPAREN math_expression RPAREN { $$ = $2; }
| css_value { $$ = $1; }
| color_value { $$ = $1; }
| value { $$ = $1; }
;
bool_value
: BOOL { $$ = { type: 'BooleanValue', value: $1.toLowerCase() == "true" }; }
| LPAREN bool_value RPAREN { $$ = $2; }
;
value
: NUMBER { $$ = { type: 'Value', value: parseFloat($1) }; }
| SUB NUMBER { $$ = { type: 'Value', value: -parseFloat($2) }; }
;
css_value
: LENGTH { $$ = { type: 'LengthValue', value: parseFloat($1), unit: /[a-z]+/.exec($1)[0] }; }
| ANGLE { $$ = { type: 'AngleValue', value: parseFloat($1), unit: /[a-z]+/.exec($1)[0] }; }
| TIME { $$ = { type: 'TimeValue', value: parseFloat($1), unit: /[a-z]+/.exec($1)[0] }; }
| FREQ { $$ = { type: 'FrequencyValue', value: parseFloat($1), unit: /[a-z]+/.exec($1)[0] }; }
| RES { $$ = { type: 'ResolutionValue', value: parseFloat($1), unit: /[a-z]+/.exec($1)[0] }; }
| EMS { $$ = { type: 'EmValue', value: parseFloat($1) }; }
| EXS { $$ = { type: 'ExValue', value: parseFloat($1) }; }
| CHS { $$ = { type: 'ChValue', value: parseFloat($1) }; }
| REMS { $$ = { type: 'RemValue', value: parseFloat($1) }; }
| VHS { $$ = { type: 'VhValue', value: parseFloat($1) }; }
| VWS { $$ = { type: 'VwValue', value: parseFloat($1) }; }
| VMINS { $$ = { type: 'VminValue', value: parseFloat($1) }; }
| VMAXS { $$ = { type: 'VmaxValue', value: parseFloat($1) }; }
| PERCENTAGE { $$ = { type: 'PercentageValue', value: parseFloat($1) }; }
| SUB css_value { var prev = $2; prev.value *= -1; $$ = prev; }
;
color_value
: COLOR { $$ = { type: 'ColorValue', value: $1 }; }
;
string
: STRING { $$ = { type: 'String', value: $1 }; }
;