# bson_copy_to_excluding()

## Synopsis

    void
    bson_copy_to_excluding (const bson_t *src,
                            bson_t       *dst,
                            const char   *first_exclude,
                            ...) BSON_GNUC_NULL_TERMINATED;

## Parameters

src | A bson_t.
dst | A bson_t.
first_exclude | The first field name to exclude.

## Description

The bson_copy_to_excluding() function shall copy all fields from src to dst except those speified by the variadic, NULL terminated list of keys starting from first_exclude.

This is generally not needed except in very special situations.