Use imported C types or call C variadic functions.
C Interoperability
Topics
C and Objective-C Pointers
struct OpaqueA wrapper around an opaque C pointer.
struct AutoreleasingA mutable pointer-to-ObjC-pointer argument.
C Variadic Functions
func withInvokes the given closure with a C va argument derived from the given array of arguments.
struct CVaA wrapper around a C va pointer.
protocol CVarA type whose instances can be encoded, and appropriately passed, as elements of a C va.
func getReturns a CVa that is backed by autoreleased storage, built from the given array of arguments.
Pointers to Values
Access a pointer to a variable in memory for explicit passing to C functions.
func withInvokes the given closure with a pointer to the given argument.
func withCalls the given closure with a mutable pointer to the given argument.
func withInvokes the given closure with a buffer pointer covering the raw bytes of the given argument.
func withInvokes the given closure with a mutable buffer pointer covering the raw bytes of the given argument.
Aliases for Imported C Types
typealias CBoolThe C ‘_Bool’ and C++ ‘bool’ type.
typealias CCharThe C ‘char’ type.
typealias CChar16The C++11 ‘char16_t’ type, which has UTF-16 encoding.
typealias CChar32The C++11 ‘char32_t’ type, which has UTF-32 encoding.
typealias CDoubleThe C ‘double’ type.
typealias CFloatThe C ‘float’ type.
typealias CIntThe C ‘int’ type.
typealias CLongThe C ‘long’ type.
typealias CLongThe C ‘long long’ type.
typealias CShortThe C ‘short’ type.
typealias CSignedThe C ‘signed char’ type.
typealias CUnsignedThe C ‘unsigned char’ type.
typealias CUnsignedThe C ‘unsigned int’ type.
typealias CUnsignedThe C ‘unsigned long’ type.
typealias CUnsignedThe C ‘unsigned long long’ type.
typealias CUnsignedThe C ‘unsigned short’ type.
typealias CWideThe C++ ‘wchar_t’ type.
See Also
Programming Tasks
Input and Output
Print values to the console, read from and write to text streams, and use command line arguments.
Debugging and Reflection
Fortify your code with runtime checks, and examine your values' runtime representation.
Key-Path Expressions
Use key-path expressions to access properties dynamically.
Manual Memory Management
Allocate and manage memory manually.
Type Casting and Existential Types
Perform casts between types or represent values of any type.
Operator Declarations
Work with prefix, postfix, and infix operators.