mirror of
https://github.com/CLIUtils/CLI11.git
synced 2025-04-29 20:23:55 +00:00
66 lines
1.5 KiB
C++
66 lines
1.5 KiB
C++
#pragma once
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// Distributed under the LGPL version 3.0 license. See accompanying
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// file LICENSE or https://github.com/henryiii/CLI11 for details.
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#include <string>
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#include <sstream>
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#include <iomanip>
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#include <locale>
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#include <type_traits>
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namespace CLI {
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namespace detail {
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/// Simple function to join a string
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template <typename T>
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std::string join(const T& v, std::string delim = ",") {
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std::ostringstream s;
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size_t start = 0;
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for (const auto& i : v) {
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if(start++ > 0)
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s << delim;
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s << i;
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}
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return s.str();
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}
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/// Print a two part "help" string
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void format_help(std::stringstream &out, std::string name, std::string description, size_t wid) {
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name = " " + name;
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out << std::setw(wid) << std::left << name;
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if(description != "") {
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if(name.length()>=wid)
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out << std::endl << std::setw(wid) << "";
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out << description << std::endl;
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}
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}
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/// Verify the first character of an option
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template<typename T>
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bool valid_first_char(T c) {
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return std::isalpha(c) || c=='_';
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}
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/// Verify following characters of an option
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template<typename T>
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bool valid_later_char(T c) {
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return std::isalnum(c) || c=='_' || c=='.' || c=='-';
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}
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/// Verify an option name
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inline bool valid_name_string(const std::string &str) {
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if(str.size()<1 || !valid_first_char(str[0]))
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return false;
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for(auto c : str.substr(1))
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if(!valid_later_char(c))
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return false;
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return true;
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}
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}
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}
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