From 1036211658081256520 X-Google-Thread: 109fba,4a997c219a86e9e9,start X-Google-Thread: f78e5,4a997c219a86e9e9,start X-Google-Attributes: gid109fba,gidf78e5,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news2.google.com!news3.google.com!news.glorb.com!news.alt.net!comp-std-cpp-robomod!not-for-mail From: "Henrique A. Menarin" Newsgroups: comp.lang.c++,comp.std.c++ Subject: Boost algorithm ll::accumulate question Date: Sat, 27 Jan 2007 21:55:21 CST Organization: http://groups.google.com Lines: 30 Approved: Fergus Henderson , moderator of comp.std.c++ Message-ID: <1169906041.610594.260620@k78g2000cwa.googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" X-Trace: posting.google.com 1169906047 4082 127.0.0.1 (27 Jan 2007 13:54:07 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Sat, 27 Jan 2007 13:54:07 +0000 (UTC) Return-Path: X-Authentication-Warning: mulga.csse.unimelb.edu.au: fjh set sender to devnull@stump.algebra.com using -f X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) X-Original-To: std-c++@mailman.ucar.edu Delivered-To: std-c++@mailman.ucar.edu User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; pt-BR; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1,gzip(gfe),gzip(gfe) Complaints-To: groups-abuse@google.com Injection-Info: k78g2000cwa.googlegroups.com; posting-host=201.24.67.250; posting-account=FZCX3Q0AAACoeanSMj8WiWbsRz0t-NA3 X-Virus-Scanned: amavisd-new at ucar.edu X-Virus-Scanned: amavisd-new at csse.unimelb.edu.au X-Virus-Scanned: amavisd-new at csse.unimelb.edu.au Xref: g2news2.google.com comp.lang.c++:76151 comp.std.c++:5465 I want to create a function _and so that I could write vector asserts; //... bool b = _and(asserts); and it "anded" all the elements in the vector. I implemented it like this: using namespace boost::lambda; boost::function(bool (vector)) _and; _and = bind(ll::accumulate(), bind(call_begin(), _1), bind(call_end(), _1), true, protect(_1 && _2)); But there is an error with the lambda function protect(_1 && _2). Does anyone knows what is wrong in this expression? This syntax is valid for creating similar functions for adding and multiplying numbers. --- [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ] [ --- Please see the FAQ before posting. --- ] [ FAQ: http://www.comeaucomputing.com/csc/faq.html ]