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https://github.com/CLIUtils/CLI11.git
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6b7f6a7480
* work on the flags book chapter and making sure the values are initialized properly. * Fix initialization of values used in flags or options * update some formatting and more brace initialization * update more formatting and fix a incorrect initializer * more formatting and some error fixes * more formatting * Small formatting fix Co-authored-by: Henry Schreiner <HenrySchreinerIII@gmail.com>
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
#include <CLI/CLI.hpp>
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#include <iostream>
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#include <string>
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int main(int argc, char **argv) {
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CLI::App app("test for positional arity");
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auto numbers = app.add_option_group("numbers", "specify key numbers");
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auto files = app.add_option_group("files", "specify files");
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int num1{-1}, num2{-1};
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numbers->add_option("num1", num1, "first number");
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numbers->add_option("num2", num2, "second number");
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std::string file1, file2;
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files->add_option("file1", file1, "first file")->required();
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files->add_option("file2", file2, "second file");
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// set a pre parse callback that turns the numbers group on or off depending on the number of arguments
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app.preparse_callback([numbers](std::size_t arity) {
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if(arity <= 2) {
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numbers->disabled();
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} else {
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numbers->disabled(false);
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}
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});
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CLI11_PARSE(app, argc, argv);
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if(num1 != -1)
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std::cout << "Num1 = " << num1 << '\n';
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if(num2 != -1)
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std::cout << "Num2 = " << num2 << '\n';
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std::cout << "File 1 = " << file1 << '\n';
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if(!file2.empty()) {
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std::cout << "File 2 = " << file2 << '\n';
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}
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return 0;
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}
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