PreconditionUtilities

public enum PreconditionUtilities

A utility type that replaces the internal implementation of precondition functions.


                    
                    
                    PreconditionClosure

A closure that handles a precondition.

Swift

public typealias PreconditionClosure =
    (Bool, Error, StaticString, UInt) -> ()


                    
                    
                    PreconditionFailureClosure

A closure that handles a precondition failure.

Swift

public typealias PreconditionFailureClosure = 
    (Error, StaticString, UInt) -> Never


                    
                    
                    replacePrecondition(with:)

Replaces the internal implementation of precondition(_:error:file:line:) with the given closure. Returns a RestorationHandler to execute that restores the original implentation.

Swift

static public func replacePrecondition(
    with closure: @escaping PreconditionClosure
) -> RestorationHandler


                                closure

The closure to execute when precondition(_:error:file:line:) is called.


                    
                    
                    replacePreconditionFailure(with:)

Replaces the internal implementation of preconditionFailure(error:file:line:) with the given closure. Returns a RestorationHandler to execute that restores the original implentation.

Swift

static public func replacePreconditionFailure(
    with closure: @escaping PreconditionFailureClosure
) -> RestorationHandler


                                closure

The closure to execute when preconditionFailure(error:file:line:) is called.