func main() {
log.SetFlags(0)
flag.Parse()
world = script.NewWorld()
world.Func("exit", exit)
script.Debug = *debug
if flag.NArg() > 1 {
check(fmt.Errorf("need 0 or 1 input files"))
}
if flag.NArg() == 1 {
src, err := os.Open(flag.Arg(0))
check(err)
ps1 = ">"
interpret(src)
} else {
ps1 = ""
interpret(os.Stdin)
}
}
func Eval1Line(code string) interface{} {
tree, err := World.Compile(code)
if err != nil {
LogErr(err.Error())
return nil
}
if len(tree.Children) != 1 {
LogErr("expected single statement:" + code)
return nil
}
return tree.Children[0].Eval()
}
// holds the script state (variables etc)
var World = script.NewWorld()
// Add a function to the script world
func DeclFunc(name string, f interface{}, doc string) {
World.Func(name, f, doc)
}
// Add a constant to the script world
func DeclConst(name string, value float64, doc string) {
World.Const(name, value, doc)
}
// Add a read-only variable to the script world.
// It can be changed, but not by the user.
func DeclROnly(name string, value interface{}, doc string) {
World.ROnly(name, value, doc)