blob: 27040993775537a7f709e192e8be27f8676a3313 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
// Copyright Catch2 Authors
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
// SPDX-License-Identifier: BSL-1.0
// 232-Cfg-CustomMain.cpp
// Show how to use custom main and add a custom option to the CLI parser
#include <catch2/catch_session.hpp>
#include <iostream>
int main(int argc, char** argv) {
Catch::Session session; // There must be exactly one instance
int height = 0; // Some user variable you want to be able to set
// Build a new parser on top of Catch2's
using namespace Catch::Clara;
auto cli
= session.cli() // Get Catch2's command line parser
| Opt( height, "height" ) // bind variable to a new option, with a hint string
["--height"] // the option names it will respond to
("how high?"); // description string for the help output
// Now pass the new composite back to Catch2 so it uses that
session.cli( cli );
// Let Catch2 (using Clara) parse the command line
int returnCode = session.applyCommandLine( argc, argv );
if( returnCode != 0 ) // Indicates a command line error
return returnCode;
// if set on the command line then 'height' is now set at this point
std::cout << "height: " << height << '\n';
return session.run();
}
|
