zwd321081 / BI-JSON-Parser

custom bi JSON parser

reference

lexer

1. https://github.com/antlr/grammars-v4/blob/master/javascript/JavaScriptLexer.g4
2. https://github.com/vtrushin/json-to-ast/blob/master/lib/tokenize.js

grammar

1. https://github.com/antlr/grammars-v4/blob/master/json/JSON.g4

grammar JSON;

json
    : value
    ;


value
    : STRING(|STRING)*
    | NUMBER
    | obj
    | 'true'
    | 'false'
    ;

obj 
    : "{" pair (,pair)* "}"
    ;

pair
    String: value

STRING
   : '"' (ESC | SAFECODEPOINT)* '"'
   ;

NUMBER
   : '-'? INT ('.' [0-9] +)? EXP?
   ;