Module cpp_classic 

The classic OMG IDL to C++ 1.3 mapping of topic types, as a layer over the native one.

CppMapping::Classic keeps the wire codec, the TypeObject and the endpoint gates where they are, as CppMapping::Psm does, and gives the application the types the classic mapping names, in C++03:

IDL	native (zd_native::…)	classic (the IDL’s own namespaces)
long, unsigned long, …	std::int32_t, …	CORBA::Long, CORBA::ULong, …
octet, boolean, char, wchar	zerodds::wire::Octet, bool, char, std::uint16_t	CORBA::Octet, CORBA::Boolean, CORBA::Char, CORBA::WChar
string, wstring	std::string	CORBA::String_var, CORBA::WString_var
sequence<T>	std::vector<T>	zerodds::classic::Sequence<T>
T a[2][3]	std::array<std::array<T, 3>, 2>	T a[2][3]
map<K,V>	zerodds::Map<K, V>	zerodds::Map<K, V> (a string key is a std::string)
@optional T m	T *, NULL when absent	zerodds::classic::Optional<T>
@external T m	std::shared_ptr<T>	zerodds::classic::Var<T>
struct	struct, the base a public base class	struct with public members, S_var
union	_d() and one accessor per case	class: _d(), one accessor per case
enum	enum class	plain enum, the values written out
bitmask	an unsigned integer and constants	the same
typedef	using	typedef

The classic declarations stand between the markers ZD-CLASSIC-BEGIN and ZD-CLASSIC-END and are C++03: they include zerodds/classic.hpp and nothing newer. The native types, the codec and zerodds::classic::Conv after them are C++17. Conv<C> (zerodds/classic/convert.hpp) names the native type of each classic type and converts both ways; the topic_type_support of a classic type calls the native one’s encode and decode through it, so a classic sample takes the same bytes, the same TypeObject and the same type name as the native one.

Not remapped, and left to the native types by name: constants, exceptions. Refused by name, because the classic mapping has no form for them: fixed, bitset, value types, any, and an array as the element of a sequence.

Constants

BEGIN_MARKER

The marker that opens the C++03 part of a classic header.

END_MARKER

The marker that closes it.

Functions

classic_layer

The text of the classic layer for ast: the C++03 declarations between the markers, and the zerodds::classic::Conv specialisations after them.