There are two reasons for this change.
1) The C++ mantra "throw by value, catch by reference" still applies,
even when you're only specifically throwing std::system_error at this
time
2) Vulkan-Hpp is using C++ stdlib containers, such as std::string and
std::vector, which have their own exception specifications to consider.
The example provided may throw various exceptions, all of which derive
from std::exception, and many will not be std::system_error.
This is a serious issue in the readme simply because that snippet of
code will be the copy/pasted foundation of many projects which adopt
Vulkan-Hpp. We might as well try to avoid some common pitfalls of
exception handling.
- no accessor functions to those members any more, but just direct access to them available;
- modified "named parameter idiom" to use setter-functions with the prefix "set", continuing with an uppercase letter;
- If the C++11 feature "unrestricted unions" is not supported, unions may hold the native vulkan datatypes, instead of those from the vk-namespace (in fact, it's just the vk::ClearValue that needs handling here). For clang, gcc, and MSVC compiler, the support of/version supporting this feature is checked; for other compilers, you need to check on your own and define VK_CPP_HAS_UNRESTRICTED_UNIONS if appropriate.
- replaces pairs of (count, [const] T*) in the enhanced interface
- has constructor for single T, (count, [const] T*), std::array<[const]T,N>, std::vector<[const]T], and std::initializer_list<const T>.
- Enable enhanced mode by default, use VKCPP_DISABLE_ENHANCED_MODE to disable it
- Rename vk_cpp.h to vk_cpp.hpp to be more standard-conform with regards to naming
- Automatically use vk.xml from submodule if no other file has be specified
- Generate header in vulkand folder to avoid copying the file after generating it
- Catch exceptions in generator
moved vk::Optional constructor on std::nullptr_t from private to public;
introduced vk::Optional::operator->() and explicit operator bool();
removed static operator null() on all struct-wrapper classes
