#882

Committed 31 Aug 2023 07:44PM UTC coverage: 41.798% (-44.7%) from 86.546%

Build # #882

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0.0

/libs/core/program_options/examples/env_options.cpp

// Copyright Thomas Kent 2016
//  SPDX-License-Identifier: BSL-1.0
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt
// or copy at http://www.boost.org/LICENSE_1_0.txt)

#include <hpx/modules/program_options.hpp>

#include <algorithm>
#include <cctype>
#include <functional>
#include <iostream>
#include <string>

#include <hpx/config/warnings_prefix.hpp>

namespace po = hpx::program_options;

std::string mapper(std::string env_var)
{
    // ensure the env_var is all caps
    std::transform(env_var.begin(), env_var.end(), env_var.begin(),
        [](char c) { return std::toupper(c); });

    if (env_var == "PATH")
        return "path";
    if (env_var == "EXAMPLE_VERBOSE")
        return "verbosity";

    return "";
}

void get_env_options()
{
    po::options_description config("Configuration");
    // clang-format off
    config.add_options()
        ("path", "the execution path")
        ("verbosity", po::value<std::string>()->default_value("INFO"),
         "set verbosity: DEBUG, INFO, WARN, ERROR, FATAL")
        ;
    // clang-format on

    po::variables_map vm;
    store(po::parse_environment(
              config, std::function<std::string(std::string)>(mapper)),
        vm);
    notify(vm);

    if (vm.count("path"))
    {
        std::cout << "First 75 chars of the system path: \n";
        std::cout << vm["path"].as<std::string>().substr(0, 75) << std::endl;
    }

    std::cout << "Verbosity: " << vm["verbosity"].as<std::string>()
              << std::endl;
}

int main()
{
    get_env_options();

    return 0;
}

1	// Copyright Thomas Kent 2016
2	// SPDX-License-Identifier: BSL-1.0
3	// Distributed under the Boost Software License, Version 1.0.
4	// (See accompanying file LICENSE_1_0.txt
5	// or copy at http://www.boost.org/LICENSE_1_0.txt)
6
7	#include <hpx/modules/program_options.hpp>
8
9	#include <algorithm>
10	#include <cctype>
11	#include <functional>
12	#include <iostream>
13	#include <string>
14
15	#include <hpx/config/warnings_prefix.hpp>
16
17	namespace po = hpx::program_options;	×
18
19	std::string mapper(std::string env_var)
20	{
21	// ensure the env_var is all caps	×
22	std::transform(env_var.begin(), env_var.end(), env_var.begin(),
23	[](char c) { return std::toupper(c); });	×
24		×
25	if (env_var == "PATH")	×
26	return "path";	×
27	if (env_var == "EXAMPLE_VERBOSE")
28	return "verbosity";	×
29
30	return "";
31	}	×
32
33	void get_env_options()	×
34	{
35	po::options_description config("Configuration");	×
36	// clang-format off	×
37	config.add_options()	×
38	("path", "the execution path")
39	("verbosity", po::value<std::string>()->default_value("INFO"),
40	"set verbosity: DEBUG, INFO, WARN, ERROR, FATAL")
41	;
42	// clang-format on	×
43		×
44	po::variables_map vm;	×
45	store(po::parse_environment(
46	config, std::function<std::string(std::string)>(mapper)),	×
47	vm);
48	notify(vm);	×
49
50	if (vm.count("path"))	×
51	{	×
52	std::cout << "First 75 chars of the system path: \n";
53	std::cout << vm["path"].as<std::string>().substr(0, 75) << std::endl;
54	}	×
55
56	std::cout << "Verbosity: " << vm["verbosity"].as<std::string>()	×
57	<< std::endl;
58	}	×
59
60	int main()	×
61	{
62	get_env_options();
63
64	return 0;
65	}

STEllAR-GROUP / hpx / #882

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