Generic Instance Method


Calls the given closure with a pointer to the contents of the string, represented as a null-terminated sequence of UTF-8 code units.



func withCString<Result>(_ body: (UnsafePointer<CChar>) throws -> Result) rethrows -> Result



A closure with a pointer parameter that points to a null-terminated sequence of UTF-8 code units. If body has a return value, that value is also used as the return value for the withCString(_:) method. The pointer argument is valid only for the duration of the method’s execution.

Return Value

The return value, if any, of the body closure parameter.


The pointer passed as an argument to body is valid only during the execution of withCString(_:). Do not store or return the pointer for later use.