- 2019 wish list - 2 Updates
- Vector with fixed memory size? - 2 Updates
- Shorthand ~> pointers - 1 Update
- Running code in a different folder without redefinition errors. - 1 Update
- Multi-channel rand() - 12 Updates
- [-Wunused-parameter] - 2 Updates
| woodbrian77@gmail.com: Dec 26 12:56PM -0800 Shalom Here's my 2019 wish list: 1. Clang and Gcc keep supporting #import. 2. Microsoft makes it so you don't have to call WSAStartup(). By the grace of G-d, I've made this: https://github.com/Ebenezer-group/onwards/blob/master/src/cmw/tiers/genz.cc into a nice little program. One of few warts remaining in it is the call to "winStart" that wraps the call to WSAStartup(). On FreeBSD and Linux, winStart() is a no-op. 2019 would be a good time to clean that up! 3. A compiler (Gcc?) with support for static exceptions. I'll be able to start taking advantage of static exceptions in the closed-source part of my work. 4. Std::string_view is back-ported to 2011 C++ and std::span is back-ported to 2017 C++. These things would go a long way to making 2019 even better than 2018. Brian Ebenezer Enterprises - Enjoying programming again. https://github.com/Ebenezer-group/onwards |
| Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk>: Dec 26 09:55PM > wraps the call to WSAStartup(). On FreeBSD and > Linux, winStart() is a no-op. 2019 would be a > good time to clean that up! Just use boost.asio. [snip] /Flibble -- "You won't burn in hell. But be nice anyway." – Ricky Gervais "I see Atheists are fighting and killing each other again, over who doesn't believe in any God the most. Oh, no..wait.. that never happens." – Ricky Gervais "Suppose it's all true, and you walk up to the pearly gates, and are confronted by God," Bryne asked on his show The Meaning of Life. "What will Stephen Fry say to him, her, or it?" "I'd say, bone cancer in children? What's that about?" Fry replied. "How dare you? How dare you create a world to which there is such misery that is not our fault. It's not right, it's utterly, utterly evil." "Why should I respect a capricious, mean-minded, stupid God who creates a world that is so full of injustice and pain. That's what I would say." |
| ViralTaco <kiiwy112@gmail.com>: Dec 26 12:33PM -0800 On Wednesday, December 12, 2018 at 9:49:04 PM UTC+1, JiiPee wrote: > when resizing to zero. So I guess its undefined what happens to capacity > after deleting elements? > Or any alternative good way implementing this? std::array can be created with a fixed size. If you don't want any extra memory allocation once you've initialised the vector (ie: it stays in it's bounds all the time) you can use the reserve() function from the std::vector library on your vector. Ie: `std::vector<int> foo; foo.reserve(128);` But be careful not to go above that reserve. Here is why: https://en.cppreference.com/w/cpp/container/vector/reserve |
| jameskuyper@alumni.caltech.edu: Dec 26 01:35PM -0800 On Wednesday, December 26, 2018 at 3:34:01 PM UTC-5, ViralTaco wrote: > > when resizing to zero. So I guess its undefined what happens to capacity > > after deleting elements? > > Or any alternative good way implementing this? You should generally review previous answers before posting a new one of your own. Both of the answers you given have already been mentioned several times apiece. > std::array can be created with a fixed size. He's already indicated a desire to perform push_back(), remove(), insert(), and clear(), operations that are not supported for std::array<>. > If you don't want any extra memory allocation once you've initialised the vector (ie: it stays in it's bounds all the time) > you can use the reserve() function from the std::vector library on your vector. He seems doubtful about whether "no reallocation" is absolutely guaranteed in that case. There's some basis for his concern: that guarantee is only provided for inserts, not deletions. The requirements for the validity of interators, pointers, and references to the elements of a std::vector<> effectively prohibit reallocation during most deletions, but allow it if one of the elements being deleted is the first element of the array. The only protection he has against such a reallocation is that there's no apparent reason for one to occur in that situation. |
| ViralTaco <kiiwy112@gmail.com>: Dec 26 12:27PM -0800 On Thursday, December 20, 2018 at 3:31:44 AM UTC+1, Rick C. Hodgin wrote: > of the hierarchy it is then unique. > -- > Rick C. Hodgin TL;DR: I think this is way too confusing. Remember we have `using` and smart pointers. Also typically this when you use the dreaded getters and setters Java devs love so much. Also also structs, like classes can have constructors. For example I use one in my latest project: https://git.io/fhT9f Not that my code should be used as an example. I'm just trying hard but I'm a noob. |
| ViralTaco <kiiwy112@gmail.com>: Dec 26 12:19PM -0800 On Sunday, December 23, 2018 at 7:05:14 PM UTC+1, Paul wrote: > Any suggestions? This forum has always been fantastic in response to my queries. > Many thanks, > Paul Alright the problem here is that `f()` might be undefined. Here is how I would do it: ```(header.hpp) #pragma once namespace { // Global namespace in this case. void f(); } ``` ```(header.cpp) #pragma once #include "header.hpp" #include <iostream> void f() { std::cout << "fine"; } ``` ```(main.cpp) #include "header.cpp" int main() { f(); } // This returns 0 ``` Alternatively just one header: ```(header.hpp) #pragma once #include <iostream> namespace { // Global namespace void f() { std::cout << "fine"; } } ``` ```(main.cpp) #include "header.hpp" int main { f(); } ``` Hope that helps. |
| "Rick C. Hodgin" <rick.c.hodgin@gmail.com>: Dec 26 10:29AM -0800 On Wednesday, December 26, 2018 at 1:11:31 PM UTC-5, Mr Flibble wrote: > supposed gay friends think? And if you don't agree with Jesus that > homosexuals should be put to death then that shows an inconsistency in > your faith which is revealed to be a house built on sand. This is why I don't answer your question. You already have the courses and paths for your yes/no answers mapped out. These were prepared for you literally by Satan, or one of his demon imps, so that no matter what I would reply in direct answer to your query, you have a way to stay where you are and not advance. The enemy wants you wallowing in ignorance, Leigh. This is what I'm trying to teach you. The truth is far more complex, more interesting, and it has the added benefit of being the truth. If you want to know the truth ... you can. It is different than you think, more amazing, more complete, given to understanding and full knowledge. It's not a blind "do pickles have the same skin as toads" type question simply because they look that way at a quick cursory glance without any real investigation. You have to dig deeper, Leigh. You can't go by what you think you know, because there's an active enemy at work against you who owns your thinking, and until you seek the truth he'll deceive you continually. But when you seek the truth, God steps into your life and guides you to that which you cannot find on your own. He defeats Satan for you, and opens up your understanding. It's time to grow up, Leigh. It's time to shun childish hard- headedness and ignorance, and mature into someone who is truly looking at things as they are, who is truly truth-seeking. -- Rick C. Hodgin |
| Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk>: Dec 26 06:33PM On 26/12/2018 18:29, Rick C. Hodgin wrote: > It's time to grow up, Leigh. It's time to shun childish hard- > headedness and ignorance, and mature into someone who is truly > looking at things as they are, who is truly truth-seeking. Jesus believed the Old Testament was the commandment of God (Matthew 15:3) ergo Jesus believed that homosexuals should be put to death (Leviticus 20:13). Do you agree with Jesus that homosexuals should be put to death or not? If Jesus is wrong about putting homosexuals to death then what else is Jesus wrong about? I thought gods were supposed to be infallible. /Flibble -- "You won't burn in hell. But be nice anyway." – Ricky Gervais "I see Atheists are fighting and killing each other again, over who doesn't believe in any God the most. Oh, no..wait.. that never happens." – Ricky Gervais "Suppose it's all true, and you walk up to the pearly gates, and are confronted by God," Bryne asked on his show The Meaning of Life. "What will Stephen Fry say to him, her, or it?" "I'd say, bone cancer in children? What's that about?" Fry replied. "How dare you? How dare you create a world to which there is such misery that is not our fault. It's not right, it's utterly, utterly evil." "Why should I respect a capricious, mean-minded, stupid God who creates a world that is so full of injustice and pain. That's what I would say." |
| "Rick C. Hodgin" <rick.c.hodgin@gmail.com>: Dec 26 10:38AM -0800 On Wednesday, December 26, 2018 at 1:34:03 PM UTC-5, Mr Flibble wrote: > Do you agree with Jesus that homosexuals should be put to death or not? If > Jesus is wrong about putting homosexuals to death then what else is Jesus > wrong about? I thought gods were supposed to be infallible. God will answer your question... either in this world (I pray), or in the one to come. -- Rick C. Hodgin |
| Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk>: Dec 26 06:50PM On 26/12/2018 18:38, Rick C. Hodgin wrote: >> wrong about? I thought gods were supposed to be infallible. > God will answer your question... either in this world (I pray), > or in the one to come. That is not an acceptable response as it presupposes an a priori agreement that your god exists. I know for a fact that your god doesn't exist. Disregard the e-mail I sent to you in error. /Flibble -- "You won't burn in hell. But be nice anyway." – Ricky Gervais "I see Atheists are fighting and killing each other again, over who doesn't believe in any God the most. Oh, no..wait.. that never happens." – Ricky Gervais "Suppose it's all true, and you walk up to the pearly gates, and are confronted by God," Bryne asked on his show The Meaning of Life. "What will Stephen Fry say to him, her, or it?" "I'd say, bone cancer in children? What's that about?" Fry replied. "How dare you? How dare you create a world to which there is such misery that is not our fault. It's not right, it's utterly, utterly evil." "Why should I respect a capricious, mean-minded, stupid God who creates a world that is so full of injustice and pain. That's what I would say." |
| "Rick C. Hodgin" <rick.c.hodgin@gmail.com>: Dec 26 01:59PM -0500 On 12/26/2018 1:50 PM, Mr Flibble wrote: >> or in the one to come. > That is not an acceptable response as it presupposes an a priori agreement > that your god exists. I know for a fact that your god doesn't exist. The truth is as the truth is, Leigh. I used to believe as you do. Something I could never have accepted before it happened to me ... happened to me. Now I sit on this side of that transformation teaching you that it exists. You'll never be able to believe it or receive it ... until you set your sights on the truth and God transforms you from the inside out. ----- Happy living, Leigh. I wish you nothing but success in your dreams. And I further wish salvation for your soul. -- Rick C. Hodgin |
| Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk>: Dec 26 07:25PM On 26/12/2018 18:59, Rick C. Hodgin wrote: > ----- > Happy living, Leigh. I wish you nothing but success in your dreams. > And I further wish salvation for your soul. You think you are teaching me? You really are a pompous, sanctimonious, self righteous cockwomble. You remind me of that Christian missionary John Chau who was killed by an isolated Indian tribe recently. He paid the ultimate sacrifice for not being able to take a hint. Beware the bows and arrows mate as not everyone wants to be "taught" your flavour of bullshit. No need to reply (if you do I will add you to my spam filter). /Flibble -- "You won't burn in hell. But be nice anyway." – Ricky Gervais "I see Atheists are fighting and killing each other again, over who doesn't believe in any God the most. Oh, no..wait.. that never happens." – Ricky Gervais "Suppose it's all true, and you walk up to the pearly gates, and are confronted by God," Bryne asked on his show The Meaning of Life. "What will Stephen Fry say to him, her, or it?" "I'd say, bone cancer in children? What's that about?" Fry replied. "How dare you? How dare you create a world to which there is such misery that is not our fault. It's not right, it's utterly, utterly evil." "Why should I respect a capricious, mean-minded, stupid God who creates a world that is so full of injustice and pain. That's what I would say." |
| "Rick C. Hodgin" <rick.c.hodgin@gmail.com>: Dec 26 02:31PM -0500 On 12/26/2018 2:25 PM, Mr Flibble wrote: > You think you are teaching me? Trying to teach you. And not to listen to me, but to go to the source and read and learn and seek to understand. All I ask is that you set your heart on knowing the truth truly, without any deception or falseness. Resolve to do this in your heart, and then proceed with looking at Jesus, the Bible, and other such things. It's the true seeking the truth that makes the difference, and allows the change to come. -- Rick C. Hodgin |
| Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk>: Dec 26 07:34PM On 26/12/2018 19:31, Rick C. Hodgin wrote: > proceed with looking at Jesus, the Bible, and other such things. > It's the true seeking the truth that makes the difference, and allows > the change to come. *plonk* -- "You won't burn in hell. But be nice anyway." – Ricky Gervais "I see Atheists are fighting and killing each other again, over who doesn't believe in any God the most. Oh, no..wait.. that never happens." – Ricky Gervais "Suppose it's all true, and you walk up to the pearly gates, and are confronted by God," Bryne asked on his show The Meaning of Life. "What will Stephen Fry say to him, her, or it?" "I'd say, bone cancer in children? What's that about?" Fry replied. "How dare you? How dare you create a world to which there is such misery that is not our fault. It's not right, it's utterly, utterly evil." "Why should I respect a capricious, mean-minded, stupid God who creates a world that is so full of injustice and pain. That's what I would say." |
| "Rick C. Hodgin" <rick.c.hodgin@gmail.com>: Dec 26 02:54PM -0500 On 12/26/2018 2:34 PM, Mr Flibble wrote: >> It's the true seeking the truth that makes the difference, and allows >> the change to come. > *plonk* May the C++ channel now enjoy far greater peace. -- Rick C. Hodgin |
| "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid>: Dec 26 11:58AM -0800 On 12/24/2018 4:54 PM, Rick C. Hodgin wrote: > Is there an equivalent of a multi-channel rand() function that enables > multiple simultaneous separate pseudo-random number generators by some- > thing like a handle or instance of each in the standard library? Fwiw, take a deep look at: https://en.wikipedia.org/wiki/Linear_congruential_generator |
| "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid>: Dec 26 12:00PM -0800 On 12/26/2018 11:54 AM, Rick C. Hodgin wrote: >>> the change to come. >> *plonk* > May the C++ channel now enjoy far greater peace. Jesus told me to tell you about: https://en.wikipedia.org/wiki/Permuted_congruential_generator |
| "Rick C. Hodgin" <rick.c.hodgin@gmail.com>: Dec 26 03:13PM -0500 On 12/26/2018 3:00 PM, Chris M. Thomasson wrote: > Jesus told me to tell you about: > https://en.wikipedia.org/wiki/Permuted_congruential_generator Then I'll thank Jesus for that. And you for being obedient. :-) -- Rick C. Hodgin |
| "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com>: Dec 26 04:31AM +0100 On 26.12.2018 03:47, AL.GleeD NICE wrote: > ucioption.cpp:42:35: warning: unused parameter 'o' [-Wunused-parameter] > void on_large_pages(const Option& o) { TT.resize(0); } // warning is ok, will be removed You get the warning because `o` is not used. The traditional solution has been to either drop the argument name, void on_large_pages( const Option& ) ... or to pseudo-use it in an expression casted to `void`: void on_large_pages( const Option& o ) { (void) o; // more code } To be sure that that doesn't dis-inform a reader after some maintainer has introduced some actual use of `o`, you can inhibit further use by shadowing the name, e.g. void on_large_pages( const Option& o ) { (void) o; struct o; // more code, that just can't access `o` } There are two main problems with that, though: (A) some programmers may not understand what the heck that's about, even if you encapsulate it in a macro with self-describing name, and (B) the compiler's diagnostics when some maintainer inadvertently uses `o` with removing that line, and be pretty ungrokable and misleading. --- C++17 introduced an attribute for this, void on_large_pages( [[maybe_unused]] const Option& o ) And I think it was from C++14 there is something like dummy assign in the standard library, but I'm unable to find it now. I just noted it when I saw it, once, that hey that's cool, I'll start using that. And then I forgot all about it. Cheers!, - Alf |
| ViralTaco <kiiwy112@gmail.com>: Dec 26 12:07PM -0800 On Wednesday, December 26, 2018 at 3:47:52 AM UTC+1, AL.GleeD NICE wrote: > void on_large_pages(const Option& o) { TT.resize(0); } // warning is ok, will be removed > -------- > I do not know the direct cause. And the associated curve Hey, Like Alf mentioned I suggest using the attribute `[[maybe_unused]]` Note that `[[unused]]` may also exist but isn't standard in C++17 as far as I know. (And won't work on the latest version of msvc I tried)… ie: void foo([[maybe_unused]] const Option& o) /* const noexcept(true) */ { // function body; } |
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