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38 lines
904 B
38 lines
904 B
/*****************************************************************************
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*
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* demo program - part of CLIPP (command line interfaces for modern C++)
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*
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* released under MIT license
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*
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* (c) 2017-2018 André Müller; foss@andremueller-online.de
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*
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*****************************************************************************/
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#include <iostream>
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#include <vector>
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#include <clipp.h>
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int main(int argc, char* argv[])
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{
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using namespace clipp;
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using std::cout;
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auto is_char = [](const std::string& arg) {
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return arg.size() == 1 && std::isalpha(arg[0]);
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};
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char lbl = ' ';
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auto cli = (
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command("auto").set(lbl, '_') |
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( command("label"), value(is_char, "character", lbl) )
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);
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if(parse(argc, argv, cli)) {
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cout << "Label: " << lbl << '\n';
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}
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else {
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cout << "Usage:\n" << usage_lines(cli,argv[0]) << '\n';
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}
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}
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