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# bson_iter_next()

## Synopsis

    bool
    bson_iter_next (bson_iter_t *iter);

## Parameters

- `iter`: A bson_iter_t.

## Description

Advances `iter` to the next element in the document.

## Returns

true if `iter` was advanced. Returns false if `iter` has passed the last element in the document or encountered invalid BSON.

It is a programming error to use `iter` after this function has returned false.