Split.hpp
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#pragma once
// Distributed under the LGPL v2.1 license. See accompanying
// file LICENSE or https://github.com/CLIUtils/CLI11 for details.
#include <string>
#include <vector>
#include <tuple>
#include "CLI/Error.hpp"
#include "CLI/StringTools.hpp"
namespace CLI {
namespace detail {
// Returns false if not a short option. Otherwise, sets opt name and rest and returns true
inline bool split_short(const std::string ¤t, std::string &name, std::string &rest) {
if(current.size()>1 && current[0] == '-' && valid_first_char(current[1])) {
name = current.substr(1,1);
rest = current.substr(2);
return true;
} else
return false;
}
// Returns false if not a long option. Otherwise, sets opt name and other side of = and returns true
inline bool split_long(const std::string ¤t, std::string &name, std::string &value) {
if(current.size()>2 && current.substr(0,2) == "--" && valid_first_char(current[2])) {
auto loc = current.find("=");
if(loc != std::string::npos) {
name = current.substr(2,loc-2);
value = current.substr(loc+1);
} else {
name = current.substr(2);
value = "";
}
return true;
} else
return false;
}
// Splits a string into multiple long and short names
inline std::vector<std::string> split_names(std::string current) {
std::vector<std::string> output;
size_t val;
while((val = current.find(",")) != std::string::npos) {
output.push_back(current.substr(0,val));
current = current.substr(val+1);
}
output.push_back(current);
return output;
}
/// Get a vector of short names, one of long names, and a single name
inline std::tuple<std::vector<std::string>,std::vector<std::string>, std::string>
get_names(const std::vector<std::string> &input) {
std::vector<std::string> short_names;
std::vector<std::string> long_names;
std::string pos_name;
for(std::string name : input) {
if(name.length() == 0)
continue;
else if(name.length() > 1 && name[0] == '-' && name[1] != '-') {
if(name.length()==2 && valid_first_char(name[1]))
short_names.emplace_back(1,name[1]);
else
throw BadNameString("Invalid one char name: "+name);
} else if(name.length() > 2 && name.substr(0,2) == "--") {
name = name.substr(2);
if(valid_name_string(name))
long_names.push_back(name);
else
throw BadNameString("Bad long name: "+name);
} else if(name == "-" || name == "--") {
throw BadNameString("Must have a name, not just dashes");
} else {
if(pos_name.length() > 0)
throw BadNameString("Only one positional name allowed, remove: "+name);
pos_name = name;
}
}
return std::tuple<std::vector<std::string>,std::vector<std::string>, std::string>
(short_names, long_names, pos_name);
}
} // namespace detail
} // namespace CLI