Math expression evaluator

Desription

Simple math expression evaluator.

Supported operators ordered by precedence:

• Unary operators: +, -
• Factor operators: *, /
• Term operators: +, -

The evaluator supports grouping expression as well.

Examples:

• 2.2 + 2.8
• 5 * -2
• 2 + 14 / 2
• (1 + 4) * 5 / (10 + -5)
• (2 + 7) * 2 + 2.5

Configuration

You can set which lexer and parser to use in the .env configuration file.

• env variable LEXER (supported options are Regex, Scanner)
• env variable PARSER (supported options are Recursive, Pratt)

NPM Commands

• Run the program: npm run start
• Run program in watch mode: npm run start:dev
• Run unit tests: npm run test
• Run unit tests in watch mode: npm run test:dev