optional: Create an optional S7 type

In rtemis.core: Core Utilities for the 'rtemis' Ecosystem

Create an optional S7 type

Description

Creates an S7 union type that allows for the specified type or NULL.

Usage

optional(type)

Arguments

type	S7 base class or S7 class.

Details

This should be used when the S7 class already includes all the necessary validation for the non-NULL case. Otherwise, create a new S7 property with appropriate validator using S7::new_property().

Value

An S7 union type that allows for the specified type or NULL.

Author(s)

EDG

Examples

# Create an optional character type
optional(S7::class_character)

rtemis.core documentation built on Sept. 20, 2026, 9:06 a.m.