Questions tagged [c++11]
Code that is written to the 2011 version of the C++ standard, sometimes known by its pre-publication name of "C++0x". Use in conjunction with the 'c++' tag.
1,716
questions
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answers
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infix_iterator code
I've previously posted this on Stack Overflow, and am considering submitting it to Boost for wider distribution, but thought perhaps it would be best to put it up here for peer review first, and see ...
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votes
4
answers
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Seed std::mt19937 from std::random_device
Many people seed their Mersenne Twister engines like this:
std::mt19937 rng(std::random_device{}());
However, this only provides a single ...
- 803
54
votes
6
answers
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Simple integer range for C++11 range-based for loops
I'm really tired of having to type
for (int iSomething = rangeBegin; iSomething < rangeEnd; ++iSomething)
{
...
}
whenever I want to iterate over an ...
- 787
54
votes
2
answers
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Named operators in C++
A post by Yakk alerted me to the idea of named operators in C++. This look splendid (albeit very unorthodox). For instance, the following code can be made to compile trivially:
...
- 6,588
51
votes
3
answers
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shared_ptr and FILE for wrapping cstdio (update: also dlfcn.h)
Even in the presence of <fstream>, there may be reason for using the <cstdio> file interface. I was wondering if ...
- 1,193
43
votes
5
answers
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Parallel sieve of Eratosthenes
For the first time, I tried to use threads by myself in order to implement a parallel sieve of Eratosthenes. The trick is that each time a prime is found, a thread is spawned to eliminate all the ...
- 19.9k
34
votes
2
answers
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A multi-threaded Producer Consumer with C++11
I am trying to learn concurrent programming in C++11. I tried to write code for a classic producer consumer concurrency problem. Would you please review and make any comments about it?
...
- 391
32
votes
6
answers
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Aliens at the train
I solved this problem on SPOJ:
The aliens have arrived to Earth and everything is in harmony, the two
races can live together. However, one specific Female Alien does not
want to see humans on ...
32
votes
2
answers
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Lexer+Parser code for my "Reedoo" programming language
I've been working on my own programming language, as a hobby for the past couple of months now, called Reedoo. It is implemented in pure C++ 11 and uses only the libraries that come with C++; no ...
- 547
31
votes
2
answers
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Dynamically call lambda based on stream input
Some context: I have code that looks like this (minor issue noted here):
...
- 94.3k
31
votes
3
answers
28k
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Quadtree implementation
I've implemented a quadtree in C++. Ignore any apparent similarity to the pseudocode on Wikipedia, it's all in your head, I swear.
How can I improve it? Algorithm speed/space improvements, any extra ...
- 2,226
31
votes
1
answer
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Yet another 'any' class implementation, named 'some'
This is a follow-up of 'any' class implementation. After posting my answer, I kept working on the code towards parameterizing with respect to memory management as I had promised. I ended up in some ...
- 2,274
30
votes
3
answers
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"Zip-like" functionality with C++11's range-based for-loop
My goal was to get the following code to work:
...
- 423
29
votes
3
answers
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Impossibly fast delegate in C++11
This legendary C++ delegate article can be easily converted into C++11, without the need for fancy preprocessor magic in the original. I'd like to know if I got all the necessary C++11 nuances right. ...
28
votes
6
answers
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Validating opening and closing bracket pairs
I have refactored one of my old homework assignments (mainly to utilize std::stack and some C++11), and I'm still having trouble making it less repetitive.
It ...
- 34.9k
28
votes
5
answers
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C++ Vector Clone
I'm learning C++, so I decided to make a simpler clone of std::vector.
Concerns:
I have seen people defining methods outside of the class, and only prototyping ...
- 741
27
votes
4
answers
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If she floats then she is not a witch like we thought
Continuing my C++ saga, this is the third project for my CS1 class:
Buoyancy is the ability of an object to float. Archimedes' principle
states that the buoyant force is equal to the weight of ...
- 21.8k
27
votes
4
answers
24k
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Measuring execution time in C++
I had time measuring pretty much figured out when I ended up using this structure.
...
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27
votes
2
answers
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C++11 Any class
This is a polymorphic wrapper capable of holding any type. (It is loosely based on boost::any)
In particular, this is useful when you want to store a ...
27
votes
2
answers
3k
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Sudoku solver in C++
Some time ago, this question was posed, asking for help in optimizing a Sudoku solver implemented in C++.
I decided to reimplement the code using C++11, but without guessing. That is, this Sudoku ...
- 65.3k
27
votes
2
answers
3k
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A header-only linear-time C++11 PEG parser generator supporting left-recursion and grammar ambiguity
I've rewritten my original parser generator to a header-only library which uses templates and functionals for better type safety and clarity. The generated parser creates an abstract syntax tree which ...
- 597
26
votes
6
answers
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Conversion between enum and string in C++ class header
I have the following redundant-feeling design to convert between enums and strings regarding a class that stores enums. The ...
- 431
25
votes
4
answers
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Create a C++ string using printf-style formatting
It's often convenient to use C-style printf format strings when writing C++. I often find the modifiers much simpler to use than C++ I/O manipulators, and if I'm ...
- 72k
24
votes
5
answers
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The Term-inator: Pi edition
The fourth project, continuing my C++ saga with terrible post names. :P
An approximate value of pi can be calculated using the series given
below:
$$ \pi \...
- 21.8k
24
votes
2
answers
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Thread pool worker implementation
As an exercise in using C++11 features I decided to make a thread pool class.
I would like to have a review on the code with focus on:
Standards compliance / Portability issues / Best practices
...
- 16.5k
24
votes
1
answer
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UDP Network server/client for gaming using boost.asio
I've designed those classes for use in a multiplayer game with possibly very high number of clients for one server. Is this implementation good, or is there something obvious I overlooked or something ...
- 312
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votes
1
answer
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Chrono-like clock with different epoch (from 1.1. 2000)
The following will by my simple helper, that should behave just like std::chrono::system_clock but with the epoch being 1.1. 2000, that I can easily cast durations ...
user52292
23
votes
11
answers
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views
Find nth Fibonacci Number, using iteration and recursion
I'm a beginner programmer and I came upon this problem which is to find the nth number in the Fibonacci series.
I used to solve the problem using a for loop; ...
- 409
23
votes
4
answers
21k
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Pong game using SDL 2.0
I've just finished writing my first game: a clone of the classic Pong game for Linux and Mac only. You will need SDL 2.0, SDL_ttf 2.0 and SDL_Mixer 2.0 to compile it. The complete project can be found ...
- 585
23
votes
3
answers
3k
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Brainfuck on-the-fly interpreter in C++
I was bored yesterday morning, so I wrote a brainfuck interpreter.
I know there are a lot, but this one is different. Why? Because it evaluates brainfuck code on the fly, reading from the input file, ...
23
votes
1
answer
7k
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Ultimate Tic-Tac-Toe with AI and GUI
During my hiatus, I decided to revisit some of the Tic-Tac-Toe questions here. I created a simple Tic-Tac-Toe GUI game, and then thought, might as well do the Ultimate Tic-Tac-Toe challenge.
I am ...
- 2,629
21
votes
3
answers
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21
votes
1
answer
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C#-like class properties
I am currently developing a new breed of 3D engine for my upcoming thesis and I really liked the C# properties, but now I am on C++11 for obvious reasons. Since I couldn't find it elsewhere, I tried ...
- 311
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votes
5
answers
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Stopwatch template
It's often useful to be able to time code, for instance, to evaluate alternative approaches to the same problem. Because this is a thing I use frequently, I have created this Stopwatch templated ...
- 65.3k
20
votes
3
answers
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Function wrapper like std::function that uses "small buffer" allocation
My Function class is similar to std::function with the small-buffer optimization. However, it always uses a small buffer and ...
- 311
20
votes
2
answers
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Unique type ID, no RTTI
Following my answer to Unique type ID in C++, I have worked towards a "safer" version that I am posting here.
This is a lightweight type that can store a unique (also across compilation units) ID per ...
- 2,274
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votes
0
answers
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Building a good C++11 template library - compile-time checked enum array [closed]
The task is to add data or values to members of a given enum class. The compiler should check if a value for each enum member is ...
- 341
19
votes
6
answers
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Testing whether characters of a string are unique
Critiques (even pedantic ones) are welcome.
...
- 193
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2
answers
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Hangman on the C++ommand line
I'm wondering if my code is just a tad too long to post here, but if the only consequence seems to be getting high-level reviews, then that's perfectly fine.
This is my implementation of Hangman in C+...
- 699
18
votes
4
answers
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N closest points to the reference point
Here is working code to get N closest points to some reference point.
Please help to improve it, specifically by commenting on my use of std algorithms and ...
- 610
18
votes
4
answers
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18
votes
2
answers
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C-style language lexer for a syntax highlighter
I'm working on implementing a syntax highlighter for a simple text editor I've been working on. To do this, I need a simple lexer for various languages (I don't need a full one - I'm only interested ...
- 417
18
votes
2
answers
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Rock-Paper-Scissors-Lizard-Spock challenge in C++
Here's my take at the Rock-Paper-Scissors-Lizard-Spock challenge. The outcomes are as follows:
Scissors cuts paper
paper covers rock
rock crushes lizard
lizard poisons Spock
Spock ...
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18
votes
2
answers
9k
views
Unique compile time (constexpr) type ID without RTTI
I am making a library where I need to generate a unique ID for a type where the ID must be known at compile time. I first relied on the address of a template function, but it proved itself unreliable ...
18
votes
2
answers
6k
views
Variant class with full move support
I tried to write my own variant class, that is fully move-semantics enabled. WRT to implemented visitors, they don't require any policy and like to be derived from <...
- 624
18
votes
2
answers
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Portable periodic/one-shot timer implementation
Note: I have posted a follow-up question for a significantly updated version of this code.
I have implemented a class that provides portable one-shot or periodic timers.
The API provides a way to ...
- 513
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votes
1
answer
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Fluid Simulation with SDL
I have always wanted to write a fluid simulation, and with the help of a paper and some StackOverflow users I've got something that works. My goal is to have a program that someone can run right away ...
- 1,016
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votes
1
answer
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TCP Socket Wrapper
I'm trying to build a simple server software for training purpose, most likely a IRC server, but I'm not there yet.
I'm currently implementing a TCP socket class, to ease the use of the C socket API. ...
- 183
17
votes
6
answers
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Using a static variable inside a lambda
Is using a static variable in a lambda function ok, or considered a bad practice? The code below works as intended (fills a vector with consecutive numbers).
...
- 281
17
votes
4
answers
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Bezier curves of grade n
I made a function which creates Bezier curves of grade n. What do you think?
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- 370