Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!1.eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed1a.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.007 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'means,': 0.07; 'subject:code': 0.07; 'wrapped': 0.07; 'libraries.': 0.09; 'subject:using': 0.09; 'url:github': 0.09; 'python': 0.11; 'example:': 0.11; '"extern': 0.16; 'exposes': 0.16; 'received :mail-oi0-x22a.google.com': 0.16; 'pointer': 0.18; 'skip': 0.18; 'python?': 0.18; 'thanks,': 0.19; 'example': 0.25; 'message- id:@mail.gmail.com': 0.28; 'correct,': 0.29; 'methods.': 0.29; 'function': 0.30; "can't": 0.32; 'class': 0.33; 'subject:?': 0.34; 'received:google.com': 0.34; 'to:addr:python-list': 0.35; 'c++': 0.35; 'but': 0.36; 'someone': 0.38; 'does': 0.39; 'to:addr:python.org': 0.39; 'subject:with': 0.40; 'simple': 0.61; 'provide': 0.61; 'more': 0.62; 'to:name:python': 0.84; 'exposing': 0.91; 'subject:Strategies': 0.91 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=/shQT7tcm7flre5lIt/OyZsnG//Ud4JCOYtDbEDGNQo=; b=cxxbM08ULimXmK4Y8Lyvd7f/4LwEn9KBZAPc/wcOt9ZUuOaCALe7bWNJMehMA3JfWc Y1hfnIr5j7EcWcKhFDqt8W20pf6ny66sbw8NLwETtJWkAcbooMU+zWvA9/V40VYMf1Vu Hn6Oyv5YwbDkZgIWs9agGtAKcsEoCrg40Nc9ZmSQZXcwNglDxFqQlJoDvFTxKBwSZSts 4Xy8T8r2SuQEGdhnChGh3lf2MzvDmHn5qY1zDrDyWJSq4wD4Wvfhu3ICRBvF1JoUtFAB EM7MKjm54iNyCpS1+nK8VTgTS9qvcoytLyyvRfu0TfOg7x4Lwn+RL8rowmtdkTg30Hq8 lZtw== MIME-Version: 1.0 X-Received: by 10.60.74.34 with SMTP id q2mr3086765oev.68.1432226490772; Thu, 21 May 2015 09:41:30 -0700 (PDT) Date: Thu, 21 May 2015 11:41:30 -0500 Subject: Strategies for using cffi with C++ code? From: Skip Montanaro To: Python Content-Type: multipart/alternative; boundary=001a1135fc5a38734605169a374f X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.20+ Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 34 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1432226500 news.xs4all.nl 2913 [2001:888:2000:d::a6]:48109 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:91015 --001a1135fc5a38734605169a374f Content-Type: text/plain; charset=UTF-8 If my reading so far is correct, you can't directly apply cffi to C++ libraries. Everything has to be wrapped in "extern C" declarations, which means, practically speaking, that you have to provide factory function wrapper(s) around constructors and methods. I did find a trivial example: https://gist.github.com/tonyseek/7821993 but that just exposes a simple function to the Python programmer. Does someone have a pointer to more substantive example of exposing a C++ class to Python? Thanks, Skip --001a1135fc5a38734605169a374f Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

If my reading so far is correct, you can't di= rectly apply cffi to C++ libraries. Everything has to be wrapped in "e= xtern C" declarations, which means, practically speaking, that you hav= e to provide factory function wrapper(s) around constructors and methods. I= did find a trivial example:



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