In [another thread](https://stackoverflow.com/questions/237804/user-defined-literals-in-c0x-a-much-needed-addition-or-making-c-even-more-bl/4051289#4051289) I introduced some techniques we would use for Model-Driven-Development in C++ once C++11 features, in particular user-defined literals, are available. I just revised the plans for GCC 4.5 and even 4.6 and it shows that this particular feature is not supported.

Anyway, do you know if I even have any compiler to test that feature to start designing/implementing the algorithms till the C++11 is approved and implemented in mainstream free compilers (LLVM, GCC)?