add value vithh error

input/variable/int64.go

@@ -0,0 +1,31 @@
+package variable
+
+import (
+	"fmt"
+	"strconv"
+
+	"gitoa.ru/go-4devs/console/input/flag"
+	"gitoa.ru/go-4devs/console/input/value"
+)
+
+func Int64(name, description string, opts ...Option) Variable {
+	return String(name, description, append(opts, WithParse(CreateInt64, AppendInt64), Value(flag.Int64))...)
+}
+
+func CreateInt64(in string) (value.Value, error) {
+	out, err := strconv.ParseInt(in, 10, 64)
+	if err != nil {
+		return nil, fmt.Errorf("create int64:%w", err)
+	}
+
+	return value.NewInt64(out), nil
+}
+
+func AppendInt64(old value.Value, in string) (value.Value, error) {
+	out, err := strconv.ParseInt(in, 10, 64)
+	if err != nil {
+		return nil, fmt.Errorf("append int64:%w", err)
+	}
+
+	return value.NewInt64s(append(old.Int64s(), out)), nil
+}