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module lang::json::\syntax::JSON

rascal-0.34.0

Usage​

import lang::json::\syntax::JSON;

syntax JSONText​

start syntax JSONText
    = Object
    | Array
    ;

syntax Value​

syntax Value
    = Object
    | Array
    | NumericLiteral
    | StringLiteral
    | False: "false"
    | Null: "null"
    | True: "true"
    ;

syntax Object​

syntax Object
    = Object: "{" { Member "," }* members "}"
    ;

syntax Member​

syntax Member
    = Member: StringLiteral memberName ":" Value memberValue
    ;

syntax Array​

syntax Array
    = Array: "[" { Value ","}* values "]"
    ;

syntax NumericLiteral​

lexical NumericLiteral
    = RealLiteral
    | IntegerLiteral
    ;

syntax RealLiteral​

lexical RealLiteral
    = [\-]? [0] [E e] [+ \-]? [0-9]+
    | [\-]? [1-9] [0-9]* [E e] [+ \-]? [0-9]+
    | [\-]? [0] "." !>> "." [0-9]*   
    | [\-]? [1-9] [0-9]* "." !>> "." [0-9]*   
    | [\-]? [0] "." [0-9]* [E e] [+ \-]? [0-9]+  
    | [\-]? [1-9] [0-9]* "." [0-9]* [E e] [+ \-]? [0-9]+  
    ;

syntax IntegerLiteral​

lexical IntegerLiteral
    = [\-]? "0" !>> [0-9] 
    | [\-]? [1-9] [0-9]* !>> [0-9] ;

syntax StringLiteral​

lexical StringLiteral
    = "\"" StringChar* chars "\"";

syntax StringChar​

lexical StringChar
    = ![\" \\]
    | "\\" [\" \\ / b f n r t] 
    | UnicodeEscape 
    ;

syntax UnicodeEscape​

lexical UnicodeEscape
    = utf16: "\\" [u] [0-9 A-F a-f] [0-9 A-F a-f] [0-9 A-F a-f] [0-9 A-F a-f] 
    | utf32: "\\" [U] [0-9 A-F a-f] [0-9 A-F a-f] [0-9 A-F a-f] [0-9 A-F a-f] [0-9 A-F a-f] [0-9 A-F a-f] 
    ;

syntax JSONKeywords​

keyword JSONKeywords
    = "false"
    | "null"
    | "true"
    ;

syntax LAYOUT​

layout LAYOUT
    = [\t-\n \r \ ]* !>> [\t-\n \r \ ]
    ;