restrict

Set or remove a value restriction on a thing. Function restriction() can be used to view the current restriction.

This function generates a change.

Function

thing.restrict(type)

Arguments

Return value

Returns the thing

Example

Use restrict() to force int values on a thing;

example = {}.restrict('int');
example.x = 10;  // this is OK
assert ( is_err ( try ( example.name = 'Iris' )));  // values must be int
example;  // only `x` is set

Return value in JSON format

{
    "x": 10
}