FastFormat is a C/C++ output and formatting
library whose design parameters are complete
type-safety, efficiency, genericity, and
extensibility. It is simple to use and extend,
highly portable (to any platform or compiler), and
it upholds the C tradition of you only pay for
what you use. FastFormat supports output and
formatting of statements of arbitrary complexity,
consisting of heterogeneous types. FastFormat
writes to output "sinks", which can be of
arbitrary type.