fix Issue 10219 - Implicit conversion between delegates returning a class and an interface
fix Issue 12778 - Aliasing opBinaryRight to opBinary works only in certain cases
Merge pull request #3576 from 9rnsr/fix10219

Issue 10219 - Implicit conversion between delegates returning a class and an interface
Merge pull request #3578 from 9rnsr/fix12778

Issue 12778 - Aliasing opBinaryRight to opBinary works only in certain cases