YOMM2 is available on Compiler Explorer. Make sure that you also select Boost
version 1.74 or above, and you probably want to add the -O3 -DNDEBUG compiler
switches.
The following examples are available:
- The examples from the slides.
- The matrix example from the GitHub langing page.
The following examples use the diff mode to compare open methods with the equivalent (closed) virtual function based approaches.
- virtual function call vs uni-method call via plain reference
- virtual function call vs uni-method call via virtual_ptr
- double dispatch vs multi-method call via plain reference
- double dispatch vs multi-method call via virtual_ptr
YOMM2 can also add polymorphic operations to non-polymorphic classes.
When virtual_ptr is used in combination with generated static offsets, method
dispatch matches the speed of virtual functions. It is also possible to generate
dispatch data that can be installed without calling update, a fairly expensive
operaiton. See this example.