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C/C++ API Documentation | 2025.1

# StrBuf::operator <<( const StrPtr * )

Append a `StrPtr` to a `StrBuf`. The string pointed to by the `StrPtr`'s `buffer` is logically appended to the string pointed to by the `StrBuf`'s `buffer`.

Virtual? | No |
Class | `StrBuf` |
Arguments | `const StrPtr *s` | (implied) pointer to the `StrPtr` instance
Returns | `StrBuf &` | reference of the `StrBuf`

## Notes

Exactly the number of bytes specified by the `StrPtr`'s `length` are appended to the `StrBuf`. The `StrBuf`'s `length` is incremented by the `StrPtr`'s `length`.

If the memory for the `StrBuf`'s `buffer` is not large enough, new contiguous memory is allocated to contain the results of appending the `StrPtr`. If new memory is allocated, the old memory is freed. Any memory allocated is separate from the memory for the `StrPtr`.

## Example

Copy

    #include &lt;iostream&gt;

    #include &lt;stdhdrs.h&gt;
    #include &lt;strbuf.h&gt;

    int main( int argc, char **argv )
    {
        StrRef sr( "zy" );
        StrPtr *sp = &amp;sr;
        StrBuf sb;

        sb.Set( "xyz" );

        cout &lt;&lt; "sb.Text() prior to sb &lt;&lt; sp returns ";
        cout &lt;&lt; "\"" &lt;&lt; sb.Text() &lt;&lt; "\"\n";
        cout &lt;&lt; "sb.Length() prior to sb &lt;&lt; sp returns ";
        cout &lt;&lt; sb.Length() &lt;&lt; "\n\n";

        sb &lt;&lt; sp;   // append StrPtr * to StrBuf

        cout &lt;&lt; "sb.Text() after sb &lt;&lt; sp returns ";
        cout &lt;&lt; "\"" &lt;&lt; sb.Text() &lt;&lt; "\"\n";
        cout &lt;&lt; "sb.Length() after sb &lt;&lt; sp returns ";
        cout &lt;&lt; sb.Length() &lt;&lt; "\n";
    }

Executing the preceding code produces the following output:

    sb.Text() prior to sb << sp returns "xyz"
    sb.Length() prior to sb << sp returns 3

    sb.Text() after sb << sp returns "xyzzy"
    sb.Length() after sb << sp returns 5

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