Function: assertDefined()

function assertDefined<T>(
   value: Nillable<T>, 
   format?: string, ...
   rest: AnyArgs): asserts value is T;

Assertion function to ensure provided value is not nil.

Type Parameters

Type Parameter
T

Parameters

Parameter	Type	Default value	Description
value	Nillable<T>	undefined	Value to check.
format	string	"Type assertion failed, unexpected 'nil' value provided."	Optional C-like formatted string for interpolation.
...rest	AnyArgs	undefined	Rest parameters to interpolate into format string.

Returns

asserts value is T

Remarks

@inline keeps the happy path as a local if check and avoids a function call at runtime.