ScopeExit.h File Reference

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Classes
class	ScopeExitSupport::TScopeGuard< FuncType >
struct	ScopeExitSupport::FScopeGuardSyntaxSupport

Namespaces
namespace	ScopeExitSupport

Macros
#define	UE_PRIVATE_SCOPE_EXIT_JOIN(A, B)   UE_PRIVATE_SCOPE_EXIT_JOIN_INNER(A, B)
#define	UE_PRIVATE_SCOPE_EXIT_JOIN_INNER(A, B)   A##B
#define	ON_SCOPE_EXIT   const auto UE_PRIVATE_SCOPE_EXIT_JOIN(ScopeGuard_, __LINE__) = ::ScopeExitSupport::FScopeGuardSyntaxSupport() + [&]()

Macro Definition Documentation

ON_SCOPE_EXIT

#define ON_SCOPE_EXIT   const auto UE_PRIVATE_SCOPE_EXIT_JOIN(ScopeGuard_, __LINE__) = ::ScopeExitSupport::FScopeGuardSyntaxSupport() + [&]()

Enables a lambda to be executed on scope exit.

Example: { FileHandle* Handle = GetFileHandle(); ON_SCOPE_EXIT { CloseFile(Handle); };

DoSomethingWithFile( Handle );

// File will be closed automatically no matter how the scope is exited, e.g.: // * Any return statement. // * break or continue (if the scope is a loop body). // * An exception is thrown outside the block. // * Execution reaches the end of the block. }

UE_PRIVATE_SCOPE_EXIT_JOIN

#define UE_PRIVATE_SCOPE_EXIT_JOIN	(		A,
			B
	)		UE_PRIVATE_SCOPE_EXIT_JOIN_INNER(A, B)

UE_PRIVATE_SCOPE_EXIT_JOIN_INNER

#define UE_PRIVATE_SCOPE_EXIT_JOIN_INNER	(		A,
			B
	)		A##B