tclap: TCLAP - Templatized C++ Command Line Parser Library 
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tclap: TCLAP is a small, flexible library that provides a simple interface
tclap: for defining and accessing command line arguments. It was intially
tclap: inspired by the user friendly CLAP library.
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tclap: TCLAP is written in ANSI C++ and is meant to be compatible with any
tclap: standards-compliant C++ compiler.
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