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What are bitwise shift (bit-shift) operators and how do they work?
...
Isn't it easier to cast your original, say 32bit cl_uint, as something like cl_uchar4 and access the byte you want directly as *.s2?
– David H Parry
Oct 13 '19 at 18:12
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Are Exceptions in C++ really slow
...cattered around memory, and complex operations to run (basically a dynamic_cast test for each handler)
So, mostly cache misses, and thus not trivial compared to pure CPU code.
Note: for more details, read the TR18015 report, chapter 5.4 Exception Handling (pdf)
So, yes, exceptions are slow on th...
When do we have to use copy constructors?
...structor with a correct signature and commit the sin of turning to a const_cast.
Copy-on-write (COW)
A COW container that has given away direct references to its internal data MUST be deep-copied at the time of construction, otherwise it may behave as a reference counting handle.
Though COW ...
How and why do I set up a C# build machine? [closed]
... be used for free with some restrictions. There is also a tutorial on Dime Casts. The reason we didn't use CruiseControl.NET is that we had a lot of small projects and it's quite painful to set each one up in CC.NET. I would highly recommend TeamCity. To summarize if you are toward open source then ...
Why shouldn't I use “Hungarian Notation”?
...raight C development with an older IDE ... that way I know there's no type casting issues.
– Beep beep
Mar 7 '09 at 19:24
3
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How to convert a std::string to const char* or char*?
...ne. Another reason to want a char* (non const) is to operate with MPI broadcast. It looks nicer if you don't have to copy back and forth. I would have personally offered a char* const getter to string. Const pointer, but editable string. Although it may have messed with the implicit conversion from ...
Android Fragments. Retaining an AsyncTask during screen rotation or configuration change
...ay. I just did it in onAttach() and onDetach() so I could avoid constantly casting the activity to TaskCallbacks every time I wanted to use it.
– Alex Lockwood
Nov 13 '14 at 16:14
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Swift Beta performance: sorting arrays
...ers[0] << "\n";
cout << "Elapsed time: " << duration_cast<duration<double>>(end - start).count() << "\n";
return 0;
}
Results:
Apple Clang 6.0
clang++ --version
Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
Target: x86_64-apple-darwin...
What is “rvalue reference for *this”?
...ill always pick the non-const version if it exists. You would need to do a cast to get the const version. I've updated the post to clarify.
– Nicol Bolas
Dec 23 '11 at 18:04
15
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Move capture in lambda
...copy_ctor const& object)
{
std::swap(wrapped_object, const_cast<move_with_copy_ctor&>(object).wrapped_object);
}
// access to wrapped object
T& operator()() { return wrapped_object; }
private:
T wrapped_object;
};
template <typename T>
move_wit...