custom_parse.cpp
1.14 KB
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
// Copyright (c) 2017-2021, University of Cincinnati, developed by Henry Schreiner
// under NSF AWARD 1414736 and by the respective contributors.
// All rights reserved.
//
// SPDX-License-Identifier: BSD-3-Clause
// from Issue #566 on github https://github.com/CLIUtils/CLI11/issues/566
#include <CLI/CLI.hpp>
#include <iostream>
#include <sstream>
// example file to demonstrate a custom lexical cast function
template <class T = int> struct Values {
T a;
T b;
T c;
};
// in C++20 this is constructible from a double due to the new aggregate initialization in C++20.
using DoubleValues = Values<double>;
// the lexical cast operator should be in the same namespace as the type for ADL to work properly
bool lexical_cast(const std::string &input, Values<double> &v) {
std::cout << "called correct lexical_cast function ! val: " << input << std::endl;
return true;
}
DoubleValues doubles;
void argparse(CLI::Option_group *group) { group->add_option("--dv", doubles)->default_str("0"); }
int main(int argc, char **argv) {
CLI::App app;
argparse(app.add_option_group("param"));
CLI11_PARSE(app, argc, argv);
return 0;
}