Evaluate formula in Go

Question

Using Go (golang) I\'d like to take a string with a formula and evaluate it with pre-defined values. Here\'s a way to do it with python\'s parser module:

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Answer 1

There is no such module in Go. You have to build your own. You could use subpackages of the go package, but they might be overkill for your application.

Answer 2

For expression or program evaluation, you can build a lexer and parser using lex and yacc, and specify exactly the syntax and semantics of your mini-language. A calculator has always been a standard yacc example, and the go versions of lex and yacc are no different.

Here's a pointer to the calc example: https://github.com/golang-samples/yacc/tree/master/simple