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###### stream_parser::write_some (3 of 4 overloads)

Parse a buffer containing all or part of a complete JSON.

<h7> Synopsis </h7>

    std::size_t
    write_some(
        string_view s,
        error_code& ec);

<h7> Description </h7>

This function parses JSON contained in the specified character buffer. If parsing completes, any additional characters past the end of the complete JSON are ignored. The function returns the actual number of characters parsed, which may be less than the size of the input. This allows parsing of a buffer containing multiple individual JSONs or containing different protocol data.

<h7> Example </h7>

    stream_parser p;                                // construct a parser
    std::size_t n;                                  // number of characters used
    n = p.write_some( "[1,2" );                     // parse the first part of the JSON
    assert( n == 4 );                               // all characters consumed
    n = p.write_some( "3,4] null" );                // parse the rest of the JSON
    assert( n == 5 );                               // only some characters consumed
    value jv = p.release();                         // take ownership of the value

<h7> Remarks </h7>

To indicate there are no more character buffers, such as when `done` returns `false` after writing, call `finish`.

<h7> Complexity </h7>

Linear in `size`.

<h7> Exception Safety </h7>

Basic guarantee. Calls to `memory_resource::allocate` may throw. Upon error or exception, subsequent calls will fail until `reset` is called to parse a new JSON.

<h7> Return Value </h7>

The number of characters consumed from the buffer.

<h7> Parameters </h7>

Name | Description
--- | ---
`s` | The character string to parse.
`ec` | Set to the error, if any occurred.