Lightning Talk: How Hard Can it be to SFINAE in C++03?
summary
Demonstrates a portable C++03 SFINAE shim that detects either an ostream operator or a void print function at compile time with no runtime overhead, using a sizeof trick to cause substitution failures, pointer-to-member return extraction to verify void returns, and recursive priority tag dispatch to force overload order. Implements manual true/false types and enable-if logic, compiles on clang, GCC, Sun Studio and xlc, and works except it doesn’t handle overloaded print functions.
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