A C++ module for ultrafast LR1 atoi type conversion with error-detection using computed goto. Typically, this code translates faster than data can be read/written from disk.
This module exposes a difference between gnu C++ and MSVC C++ in that gnu implements a computed goto and MSVC does not, and alternative coding styles are required to get similar performance from the two compilers.
This code implements full unit tests including edge and corner cases including integer underflow and overflow when it is compiled as an autonomous main program.