Comeau is a compiler implemented with the EDG front end. If the other way around was some how implied, then it was not the intention. As for Comeau and Cfront,

Comeau is a compiler implemented with the EDG front end. If the other way around was some how implied, then it was not the intention. As for Comeau and Cfront, Comeau Computing's CEO, Greg Comeau, provided one of the early ports of cfront to the PC: https://en.wikipedia.org/wiki/Comeau_C/C%2B%2B https://en.wikipedia.org/wiki/Comeau_C/C%2B%2B. Cfront is not just a preprocessor and if the comparison is limited to only C library implementations of objects such as COS, then CPre / C with Classes would be the applicable choice and not Cfront. But, the original point was not meant to exclude "trans"pilers or compilers that output to C such as Genie, Vala, etc.