Fuzzer for mathematical expressions

[AlekSi]

1. Generate mathematical expression with integers and floats, and several operators and braces. For example:

42 + 7 / (13.0)

2. Generate and run a small Go program to get an expression result or error. For example:

package main

import "fmt"

func main() {
    x := 42 + 7 / (13.0)
    fmt.Println(x)
}

3. If there is no error, feed the same expression to Gosh and compare results.

For the first step, we may use go-fuzz with some initial corpus. Later we could create a custom code generator just for mathematical expressions. See also: #40.