Instance Methodswift 6.0.3_Concurrency

    preconditionIsolated(_:file:line:)

    Stops program execution if the current task is not executing on this serial executor.

    iOS
    13.0+
    macOS
    10.15+
    tvOS
    13.0+
    watchOS
    6.0+
    @backDeployed(before: macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0)
func preconditionIsolated(_ message: @autoclosure () -> String = String(), file: StaticString = #fileID, line: UInt = #line)
    Mangled symbol
    sScf12_ConcurrencyE20preconditionIsolated_4file4lineySSyXK_s12StaticStringVSutF What are these?
    FNV24 hash
    5B8OZ

    Parameters

    message

    The message to print if the assertion fails.

    file

    The file name to print if the assertion fails. The default value is the file where this method was called.

    line

    The line number to print if the assertion fails The default value is the line where this method was called.

    This function’s effect varies depending on the build flag used:

    • In playgrounds and -Onone builds (the default for Xcode’s Debug configuration), stops program execution in a debuggable state after printing message.

    • In -O builds (the default for Xcode’s Release configuration), stops program execution.