Function resize

include/internal/CL/cl.hpp:547–578

    }

    void resize( ::size_t n )
    {
        if( size_ == n ) {
            return;
        }
        if (n == 0) {
            if( str_ ) {
                delete [] str_;
            }
            str_ = NULL;
            size_ = 0;
        } 
        else {
            char *newString = new char[n + 1];
            ::size_t copySize = n;
            if( size_ < n ) {
                copySize = size_;
            }
            size_ = n;
            
            if(str_) {
                memcpy(newString, str_, (copySize + 1) * sizeof(char));
            }
            if( copySize < size_ ) {
                memset(newString + copySize, 0, size_ - copySize);
            }
            newString[size_] = '\0';

            delete [] str_;
            str_ = newString;
        }
    }

    const char& operator[] ( ::size_t pos ) const
    {