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<h1>shell.cpp</h1><p>Example of shell parsing.</p>
<div class="fragment"><pre class="fragment"><span class="comment">// Copyright (C) 2009-2010 David Sugar, Tycho Softworks.</span>
<span class="comment">//</span>
<span class="comment">// This file is part of GNU uCommon C++.</span>
<span class="comment">//</span>
<span class="comment">// GNU uCommon C++ is free software: you can redistribute it and/or modify</span>
<span class="comment">// it under the terms of the GNU Lesser General Public License as published </span>
<span class="comment">// by the Free Software Foundation, either version 3 of the License, or</span>
<span class="comment">// (at your option) any later version.</span>
<span class="comment">//</span>
<span class="comment">// GNU uCommon C++ is distributed in the hope that it will be useful,</span>
<span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<span class="comment">// GNU Lesser General Public License for more details.</span>
<span class="comment">//</span>
<span class="comment">// You should have received a copy of the GNU Lesser General Public License</span>
<span class="comment">// along with GNU uCommon C++. If not, see <http://www.gnu.org/licenses/>.</span>
<span class="preprocessor">#ifndef DEBUG</span>
<span class="preprocessor"></span><span class="preprocessor">#define DEBUG</span>
<span class="preprocessor"></span><span class="preprocessor">#endif</span>
<span class="preprocessor"></span>
<span class="preprocessor">#include <<a class="code" href="a00210.html" title="Top level include file for the GNU uCommon C++ core library.">ucommon/ucommon.h</a>></span>
<span class="preprocessor">#include <stdio.h></span>
<span class="keyword">using namespace </span>UCOMMON_NAMESPACE;
<span class="keyword">extern</span> <span class="stringliteral">"C"</span> <span class="keywordtype">int</span> main()
{
<span class="keywordtype">int</span> test_argc;
<span class="keywordtype">char</span> *test_argv[6];
test_argc = 5;
test_argv[0] = (<span class="keywordtype">char</span> *)<span class="stringliteral">"test"</span>;
test_argv[1] = (<span class="keywordtype">char</span> *)<span class="stringliteral">"--lines=5"</span>;
test_argv[2] = (<span class="keywordtype">char</span> *)<span class="stringliteral">"-r"</span>;
test_argv[3] = (<span class="keywordtype">char</span> *)<span class="stringliteral">"a"</span>;
test_argv[4] = (<span class="keywordtype">char</span> *)<span class="stringliteral">"b"</span>;
test_argv[5] = NULL;
shell::flagopt rflag(<span class="charliteral">'r'</span>, <span class="stringliteral">"--reverse"</span>, <span class="stringliteral">"reverse order of arguments"</span>);
shell::flagopt tflag(<span class="charliteral">'t'</span>, <span class="stringliteral">"--testing"</span>, <span class="stringliteral">"never hit this flag"</span>);
shell::numericopt lines(<span class="charliteral">'l'</span>, <span class="stringliteral">"--lines"</span>, <span class="stringliteral">"number of lines in output"</span>);
shell args(test_argc, test_argv);
assert(!tflag);
assert(<a name="a0"></a><a class="code" href="a00214.html#aa074f1a5a7f2741a51a01bc1607fb4a6" title="Convenience function to validate object assuming it is castable to bool.">is</a>(rflag));
assert(*lines == 5);
assert(args() == 2); <span class="comment">// two file arguments left</span>
assert(<a name="a1"></a><a class="code" href="a00214.html#ae8329c8eceb3e760d48253f1c3386623" title="Compare two socket addresses to see if equal.">eq</a>(args[0], <span class="stringliteral">"a"</span>)); <span class="comment">// first file argument is "a"</span>
}
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