Rell System Library/[root]/require

require

function require(value: boolean, message: text)

Asserts a boolean condition.

Since

0.6.0

Parameters

value

the boolean condition to check

message

the message for the exception to be thrown if the condition is false

Throws

exception

if the provided condition is false

function <T: -any> require(value: T?, message: text): T

Asserts that a value is not null.

Return

the passed value, but with type cast from T? to T

Since

0.6.0

Parameters

value

the value to check, and returned if it is not null

message

the error message to be thrown if the value is null

Throws

exception

if the provided value is null