restructure project

internal/builtins/ord.go

@@ -0,0 +1,26 @@
+package builtins
+
+import (
+	"monkey/internal/object"
+	"monkey/internal/typing"
+)
+
+// Ord ...
+func Ord(args ...object.Object) object.Object {
+	if err := typing.Check(
+		"ord", args,
+		typing.ExactArgs(1),
+		typing.WithTypes(object.STRING_OBJ),
+	); err != nil {
+		return newError(err.Error())
+	}
+
+	s := args[0].(*object.String)
+	if len(s.Value) == 1 {
+		return &object.Integer{Value: int64(s.Value[0])}
+	}
+	return newError(
+		"TypeError: ord() expected a single character `str` got=%s",
+		s.Inspect(),
+	)
+}