value_utils.hpp

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/*
    SPDX-FileCopyrightText: 2026 Igor Mironchik <igor.mironchik@gmail.com>
    SPDX-License-Identifier: MIT
*/
 
#ifndef ARGS__VALUE_UTILS_HPP__INCLUDED
#define ARGS__VALUE_UTILS_HPP__INCLUDED
 
// Args include.
#include "exceptions.hpp"
#include "types.hpp"
#include "utils.hpp"
 
// C++ include.
#include <algorithm>
 
namespace Args
{
 
//
// eatValues
//

template<typename Container,
         typename Cmd,
         typename Ctx>
bool eatValues(Ctx &context,
               Container &container,
               const String &errorDescription,
               Cmd *cmdLine)
{
    if (!context.atEnd()) {
        auto begin = context.begin();
 
        auto last = std::find_if(context.begin(), context.end(), [&](const String &v) -> bool {
            return (cmdLine->findArgument(v) != nullptr);
        });
 
        if (last != begin) {
            begin = context.next();
 
            while (begin != last) {
                container.push_back(*begin);
 
                begin = context.next();
            }
 
            if (last != context.end()) {
                context.putBack();
            }
 
            return true;
        }
    }
 
    throw BaseException(errorDescription);
}
 
//
// eatOneValue
//

template<typename Cmd,
         typename Ctx>
String eatOneValue(Ctx &context,
                   const String &errorDescription,
                   Cmd *cmdLine)
{
    if (!context.atEnd()) {
        auto val = context.next();
 
        if (!cmdLine->findArgument(*val)) {
            return *val;
        }
 
        context.putBack();
    }
 
    throw BaseException(errorDescription);
}
 
} /* namespace Args */
 
#endif // ARGS__VALUE_UTILS_HPP__INCLUDED