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41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
// Copyright (c) 2017-2025, University of Cincinnati, developed by Henry Schreiner
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// under NSF AWARD 1414736 and by the respective contributors.
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// All rights reserved.
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//
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// SPDX-License-Identifier: BSD-3-Clause
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// from Issue #566 on github https://github.com/CLIUtils/CLI11/issues/566
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#include <CLI/CLI.hpp>
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#include <iostream>
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#include <sstream>
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#include <string>
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// example file to demonstrate a custom lexical cast function
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template <class T = int> struct Values {
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T a;
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T b;
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T c;
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};
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// in C++20 this is constructible from a double due to the new aggregate initialization in C++20.
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using DoubleValues = Values<double>;
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// the lexical cast operator should be in the same namespace as the type for ADL to work properly
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bool lexical_cast(const std::string &input, Values<double> & /*v*/) {
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std::cout << "called correct lexical_cast function ! val: " << input << '\n';
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return true;
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}
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DoubleValues doubles;
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void argparse(CLI::Option_group *group) { group->add_option("--dv", doubles)->default_str("0"); }
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int main(int argc, char **argv) {
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CLI::App app;
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argparse(app.add_option_group("param"));
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CLI11_PARSE(app, argc, argv);
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return 0;
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}
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