experiment with UTF-8/16 C++ iterators

[markusicu]

Checklist

• Required: Issue filed: https://unicode-org.atlassian.net/browse/ICU-_____
• Required: The PR title must be prefixed with a JIRA Issue number.
• Required: The PR description must include the link to the Jira Issue, for example by completing the URL in the first checklist item
• Required: Each commit message must be prefixed with a JIRA Issue number.
• Issue accepted (done by Technical Committee after discussion)
• Tests included, if applicable
• API docs and/or User Guide docs changed or added, if applicable

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Notice: the branch changed across the force-push!

• icu4c/source/common/unicode/utf16cppiter.h is different
• icu4c/source/common/unicode/uversion.h is no longer changed in the branch
• icu4c/source/test/intltest/intltest.vcxproj is different
• icu4c/source/test/intltest/intltest.vcxproj.filters is different
• icu4c/source/test/intltest/itutil.cpp is different
• icu4c/source/test/intltest/Makefile.in is different
• icu4c/source/test/intltest/utfcppitertest.cpp is different

View Diff Across Force-Push

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