parsing:基于JSON语法的解析器

解析中 一个基于JSON风格的语法的解析器。 入门 $ npm install parsing $ node /** * Based on this EBNF grammar * - from http://stackoverflow.com/questions/6805172/how-do-you-abstract-some-expression-to-bnf#answer-6805185 * * AEXP => AS+ * AS => id ':=' EX1 ';' * EX1 => EX2 (('+' | '-') EX2)* * EX2 => EX3 (('*' | '/') EX3)* * EX3 => EX4 ('^' EX3)* * EX4 => ('+'|'-')? EX5 * EX5 => id | number | '(' EX1