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https://github.com/CLIUtils/CLI11.git
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8c77664bd0
Rework some of the validator locations, add documentation, and fix some lingering issues with validators. The extra will will enable additions of some new validators and reduce compile times for those that are not needed. --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
57 lines
2.1 KiB
C++
57 lines
2.1 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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#include <CLI/CLI.hpp>
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#include <iostream>
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#include <memory>
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#include <string>
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template <typename T> class DeltaRange : public CLI::Validator {
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public:
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T center_point;
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T delta;
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DeltaRange(const T ¢er, const T &range)
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: CLI::Validator(
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[this](const std::string &value) -> std::string {
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T newValue;
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auto result = CLI::detail::lexical_cast(value, newValue);
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if(!(result && this->check(newValue))) {
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return std::string("value not within range");
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}
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return std::string{};
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},
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"RANGE"),
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center_point(center), delta(range) {}
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CLI11_NODISCARD bool check(const T &test) const {
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return (test >= (center_point - delta)) && (test <= (center_point + delta));
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}
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CLI11_NODISCARD T center() const { return center_point; }
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CLI11_NODISCARD T range() const { return delta; }
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void center(const T &value) { center_point = value; }
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void range(const T &value) { delta = value; }
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};
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int main(int argc, char **argv) {
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/* this application creates custom validator which is a range center+/- range The center and range can be defined by
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* other command line options and are updated dynamically
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*/
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CLI::App app("custom range validator");
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std::string value;
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auto dr = std::make_shared<DeltaRange<int>>(7, 3);
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app.add_option("--number", value, "enter value in the related range")->check(dr)->required();
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app.add_option_function<int>("--center", [&dr](int new_center) { dr->center(new_center); })->trigger_on_parse();
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app.add_option_function<int>("--range", [&dr](int new_range) { dr->range(new_range); })->trigger_on_parse();
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CLI11_PARSE(app, argc, argv);
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std::cout << "number " << value << " in range = " << dr->center() << " +/- " << dr->range() << '\n';
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return 0;
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}
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