[PyQt] Where is the "<<" insertion overload done?

[Dmitry Shachnev]

Hi,

On Tue, Nov 25, 2014 at 8:17 AM, David Cortesi <davecortesi at gmail.com> wrote:
> I've been happily using the "<<" insertion operator to write to QTextStreams
> for some time now, and only recently realized that "<<" is binary shift left
> in standard Python. Well, not so much realized, as had it rubbed in my face
> by PyLint, which warns that "stream << string" is an expression whose value
> is not being assigned.
>
> Somehow a QTextStream (derived) object arranges an overloaded meaning of
> ".write()" onto this operator. But where/how is the overload done?

Just like any other operator overload. Search for 'lshift_slot' in sip code.

Simple example code (in Python) if you want to do this yourself is attached.

--
Dmitry Shachnev
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