fix implicitly convertible function pointers from classes using `call_detail`'s `lua_call_wrapper`
specificaly add documentation for working with `std::function`
improve exception documentation
improve state_view default handlers
add SAFE_PROPAGATION defines for compiling C++ as Lua
add examples for automatic operator registrations and as_container
fix tutorial code
change tests to not throw unless absolutely necessary
provide synchronization for file writing in tests
provide thread safety around thread tests for REQUIRE
add ostream automatic support
change 5.1 compat to only kick in luaL_loadbufferx and luaL_loadfilex when LuaJIT is version 2.0.1 and lower
fix how `stack_aligned_protected_function` and its friends behave
add new internal handler details to allow for stack-based handlers with maximum performance
update `string_shim` typedef to simply be called `string_view` and use `string_view` in all public-facing APIs.
added variadic_results, to return a variable number of arguments to Lua
added variadic_results and as_results
added improved function examples (for multiple results and split overloading out)
added tests for variadics
added tests for C++17 utilities
added a forwarding header
added a specific `unsafe_function` header
added and improved documetation pages
We need to expose `error()` in Lua in order to let it call the error handler function. However, for that the base library needs to be available in the Lua state.
Without this fix the output of the program is
`call failed, sol::error::what() is Handled this message: [string "..."]:7: attempt to call a nil value (global 'error')`
while it's supposed to be
`call failed, sol::error::what() is Handled this message: [string "..."]:7: negative number detected`
Added the ability to extend all usertypes at runtime. The performance implications need to be examined closely.
variadic_args documentation was updated with the desired example demonstrating proper usage
usertype examples were updated demonstrating Lua runtime and C++ runtime updating of a usertype table
SOL_SAFE_FUNCTIONS is now part of the definitions and defined (thanks @eliasdaler)
