github.com/eqgo/eval

eval

Package eval provides numerical and boolean expression evaluation in Go. It is still a work in progress. Eval is based off of Knetic/govaluate and it has some improvements like supporting expressions that lack multiplication symbols and parentheses.

Example Usage

package main

import (
    "fmt"

    "github.com/eqgo/eval"
)

func main() {
    ctx := eval.DefaultContext()
    ctx.Set("x", 3.0)

    expr := eval.New("xcospi")
    err := expr.Compile(ctx)
    if err != nil {
        panic(err)
    }
    res, err := expr.Eval(ctx)
    if err != nil {
        panic(err)
    }
    fmt.Println(res) // -3
}