how to parse script expression with go and run the script

[hui zhang]

 I am developing a game engine 

I wish some event could be trigger by script. and this script expression is self-defined.

Like below 

trigger.ini 

----------------

trigger = "power >= 1000"

trigger = "statetype == A || statetype == B "

trigger = "foo() > 1"

-----------------

power and statetype are a struct variable (it also can be defined as global) in go.

foo are a struct method (it also can be defined as global) 

how can I parse the expression like "power >= 1000"

and execute it in go.

I notice there is a  go/parse package ,  but I am not sure how to use it .

[howar...@gmail.com]

The go/parse package is not really going to help much, as Go is a compiled language. What you are wanting is something akin to a scripting language, something with an 'eval' type function. While it is just barely feasible that you could accomplish something directly with Go using on-the-fly compilation, dynamic object loading, and plugins, it is going to be a lot of work and not likely to be a comfortable fit.

My recommendation would be to look at simply embedding a script engine in your Go program. There are several Lua implementations for Go, for example.

Have a look at http://awesome-go.com/#embeddable-scripting-languages and see if one of them might work for your situation. 

[Jason E. Aten]

Hello Hui,

I would invite you try my scripting language, zygomys. It is 100% Go. It offers both (lisp) and {infix} syntax.

https://github.com/glycerine/zygomys

- Jason