42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
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// Copyright Catch2 Authors
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.txt or copy at
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// https://www.boost.org/LICENSE_1_0.txt)
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// SPDX-License-Identifier: BSL-1.0
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// 232-Cfg-CustomMain.cpp
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// Show how to use custom main and add a custom option to the CLI parser
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#include <catch2/catch_session.hpp>
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#include <iostream>
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int main(int argc, char** argv) {
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Catch::Session session; // There must be exactly one instance
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int height = 0; // Some user variable you want to be able to set
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// Build a new parser on top of Catch2's
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using namespace Catch::Clara;
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auto cli
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= session.cli() // Get Catch2's command line parser
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| Opt( height, "height" ) // bind variable to a new option, with a hint string
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["--height"] // the option names it will respond to
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("how high?"); // description string for the help output
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// Now pass the new composite back to Catch2 so it uses that
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session.cli( cli );
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// Let Catch2 (using Clara) parse the command line
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int returnCode = session.applyCommandLine( argc, argv );
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if( returnCode != 0 ) // Indicates a command line error
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return returnCode;
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// if set on the command line then 'height' is now set at this point
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std::cout << "height: " << height << '\n';
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return session.run();
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}
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