Wednesday, August 8, 2012

reliably convert Any c++ source to C

Many people ask me "Can you compile a c++ app if you only have a c compiler?"

Some of the foremost experts on c/c++ compiler said on http://www.edg.com/index.php?location=faq_q6_convert --

If you mean "can you convert C++ source to C source, and run the C through a C compiler to get object code", as a way to run C++ code on a system that has only a C compiler, yes it is possible to implement all of the features of ISO standard C++ by translation to C source code, and except for exception handling this produces object code with efficiency comparable to that of the code generated by a conventional compiler.

For exception handling, it is possible to do an implementation using setjmp/longjmp that is completely conformant, but the code generated will be 5-20% slower than code generated by a true c++ compiler.

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