subscript(_:as:default:)
Get a value in this dictionary as a file descriptor.
Declaration
subscript(key: String, as type: FileDescriptor.Type = FileDescriptor.self, default defaultValue: @autoclosure () -> FileDescriptor) -> FileDescriptor { get }Parameters
- key:
The key under which to get the file descriptor.
- type:
The expected type of the resulting value.
- defaultValue:
The value to produce if no file descriptor is available under
key.
Return Value
A file descriptor value, possibly defaultValue.
Overview
The returned file descriptor is owned by the caller so they must close it.