Use this function to stop the program, without impacting the
performance of shipping code, when control flow is not expected to
reach the call (e.g. in the default case of a switch where you
have knowledge that one of the other cases must be satisfied). To
protect code from invalid usage in Release builds; see
preconditionFailure.
In playgrounds and -Onone builds (the default for Xcode's Debug
configuration) stop program execution in a debuggable state
after printing message.
In -O builds, has no effect.
In -Ounchecked builds, the optimizer may assume that this
function will never be called. Failure to satisfy that assumption
is a serious programming error.
Indicate that an internal sanity check failed.
Use this function to stop the program, without impacting the performance of shipping code, when control flow is not expected to reach the call (e.g. in the
defaultcase of aswitchwhere you have knowledge that one of the other cases must be satisfied). To protect code from invalid usage in Release builds; seepreconditionFailure.In playgrounds and -Onone builds (the default for Xcode's Debug configuration) stop program execution in a debuggable state after printing
message.In -O builds, has no effect.
In -Ounchecked builds, the optimizer may assume that this function will never be called. Failure to satisfy that assumption is a serious programming error.
Declaration
funcassertionFailure(@autoclosuremessage: () ->String=default,file:StaticString=default,line:UInt=default)