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#include <seqan3/argument_parser/all.hpp>
//![validator]
#include <cmath>
struct custom_validator
{
using option_value_type = double; // used for all arithmetic types
void operator() (option_value_type const & val) const
{
if ((std::round(val) != val) || // not an integer
(std::pow(std::round(std::sqrt(val)), 2) != val)) // not a square
{
throw seqan3::validation_error{"The provided number is not an arithmetic square."};
}
}
std::string get_help_page_message () const
{
return "Value must be the square of an integral number.";
}
};
//![validator]
static_assert(seqan3::validator<custom_validator>);
//![main]
int main(int argc, char ** argv)
{
seqan3::argument_parser myparser("Test-Parser", argc, argv);
int32_t variable{};
int16_t variable2{};
myparser.add_option(variable, 'i', "", "An int that is a square", seqan3::option_spec::DEFAULT,
custom_validator{}); // ← your validator is used!
myparser.add_option(variable2, 'j', "", "An int that is a square and within [0,20].", seqan3::option_spec::DEFAULT,
custom_validator{} | seqan3::arithmetic_range_validator{0, 20}); // ← now it's chained
try
{
myparser.parse(); // trigger command line parsing
}
catch (seqan3::argument_parser_error const & ext)
{
seqan3::debug_stream << ext.what() << '\n';
return -1;
}
seqan3::debug_stream << "Yeah!\n";
return 0;
}
//![main]
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