add eval and potentially speed up variable access speeds when multi threading. fix bug in threading count

src/eval_function.go

@@ -0,0 +1,41 @@
+package main
+
+import "fmt"
+
+func AReval(a ...any) (any, ArErr) {
+	if len(a) < 1 || len(a) > 2 {
+		return nil, ArErr{TYPE: "Type Error", message: "expected 1 or 2 argument, got " + fmt.Sprint(len(a)), EXISTS: true}
+	}
+	var expression string
+	if typeof(a[0]) != "string" {
+		return nil, ArErr{TYPE: "Type Error", message: "expected string as first argument, got " + typeof(a[0]), EXISTS: true}
+	}
+	expression = ArValidToAny(a[0]).(string)
+
+	// translate the expression
+	var code UNPARSEcode = UNPARSEcode{
+		code:     expression,
+		realcode: expression,
+		line:     0,
+		path:     "eval",
+	}
+	translated, err := translate([]UNPARSEcode{code})
+	if err.EXISTS {
+		return nil, err
+	}
+
+	var scope ArObject
+	if len(a) == 2 {
+		if typeof(a[1]) != "map" {
+			return nil, ArErr{TYPE: "Type Error", message: "expected map as second argument, got " + typeof(a[1]), EXISTS: true}
+		}
+		scope = a[1].(ArObject)
+	} else {
+		scope = newscope()
+	}
+
+	var stack stack = []ArObject{scope}
+
+	// run the translated expression
+	return run(translated, stack)
+}