Logical Expression Parser

This is a logical expression parser for JavaScript, it can parse a logical expression into a AST object and evaluates the result using your token checking function.

Supported logical operators

1. | Or
2. & And
3. ! Not
4. () Parentheses

How it works

1. The parser parse and tokenize the expression, for example one of your function requires REGISTED&(SPECIAL|INVITED)
2. Parser then will pass REGISTED, SPECIAL and INVITED into your token checking function to get a boolean result
3. Finaly the parser will evaluates the final result

Example

constLEP=require('logical-expression-parser');constREQUIREMENTS='REGISTED&(SPECIAL|INVITED)';constLIST_A=['REGISTED','INVITED'];constLIST_B=['SPECIAL','EXPERT'];constRESULT_A=LEP.parse(REQUIREMENTS,t=>LIST_A.indexOf(t)>-1);constRESULT_B=LEP.parse(REQUIREMENTS,t=>LIST_B.indexOf(t)>-1);// RESULT_A: true// RESULT_B: false