Adopt ArgumentParser for the command-line tool#154

Merged

allevato merged 5 commits intoswiftlang:masterfrom natecook1000:argumentparser

Mar 10, 2020

+159-263

Commits on Feb 27, 2020

Adopt ArgumentParser for command-line tool
natecook1000
committed

Commits on Feb 28, 2020

Address PR feedback
natecook1000
committed

Commits on Feb 29, 2020

Commits on Mar 9, 2020

Don't print an additional error message when exiting
natecook1000
committed