Dramatic simplification of legacy code by separating code and data and applying some later C++.
Function removed from Application.cpp as it was in a anonymous namespace and could not easily be subjected to unit testing.
Added ProgramOptionsUtilities.h
Fixes the matching algorithm when provided a vector of existing names:
The original algorithm was equivalent to a 'startswith' algorithm, when it should
have been testing for exact and complete string equality. This also does some
refactoring to rename and clarify variables and functions, simplifies some
functions by using standard library calls when possible, and addresses various
linter complaints. It also applies our current clang-format to the files.
Co-authored-by: Ajinkya Dahale <AjinkyaDahale@users.noreply.github.com>
If an exception occurs while setting up Xerces-C, make the test framework handle it.
Also add a copyright header, and try to quiet down the clang-tidy linter.
