value_utils.hpp

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#ifndef ARGS__VALUE_UTILS_HPP__INCLUDED
#define ARGS__VALUE_UTILS_HPP__INCLUDED
 
// Args include.
#include "utils.hpp"
#include "exceptions.hpp"
#include "types.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