StringTools.hpp
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#pragma once
// Distributed under the LGPL version 3.0 license. See accompanying
// file LICENSE or https://github.com/henryiii/CLI11 for details.
#include <string>
#include <sstream>
#include <iomanip>
#include <locale>
#include <type_traits>
namespace CLI {
namespace detail {
/// Simple function to join a string
template <typename T>
std::string join(const T& v, std::string delim = ",") {
std::ostringstream s;
size_t start = 0;
for (const auto& i : v) {
if(start++ > 0)
s << delim;
s << i;
}
return s.str();
}
/// Print a two part "help" string
void format_help(std::stringstream &out, std::string name, std::string description, size_t wid) {
name = " " + name;
out << std::setw(wid) << std::left << name;
if(description != "") {
if(name.length()>=wid)
out << std::endl << std::setw(wid) << "";
out << description << std::endl;
}
}
/// Verify the first character of an option
template<typename T>
bool valid_first_char(T c) {
return std::isalpha(c) || c=='_';
}
/// Verify following characters of an option
template<typename T>
bool valid_later_char(T c) {
return std::isalnum(c) || c=='_' || c=='.' || c=='-';
}
/// Verify an option name
inline bool valid_name_string(const std::string &str) {
if(str.size()<1 || !valid_first_char(str[0]))
return false;
for(auto c : str.substr(1))
if(!valid_later_char(c))
return false;
return true;
}
}
}