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Daniel Langr

Prague, Czech Republic

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Top Questions
69 votes

Why isn't there a std::construct_at in C++17?

c++ c++17 placement-new asked Oct 24, 2018 at 10:23
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55 votes

Do current x86 architectures support non-temporal loads (from "normal" memory)?

c++ caching x86 cpu-cache prefetch asked Oct 17, 2016 at 22:52
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48 votes

Why doesn't GCC optimize out deletion of null pointers in C++?

c++ gcc null compiler-optimization delete-operator asked Aug 15, 2017 at 9:01
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30 votes

Why does std::vector reserve not "double" its capacity, while resize does?

c++ vector resize capacity asked Jan 31, 2018 at 8:38
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28 votes

Why can't constructors be explicitly called while destructors can?

c++ constructor destructor placement-new explicit-destructor-call asked Jul 17, 2017 at 10:40
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28 votes

Will specialization of function templates in std for program-defined types no longer be allowed in C++20?

c++ std template-specialization function-templates c++20 asked Oct 11, 2018 at 12:54
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21 votes

Why isn't move constructor elided whenever possible with `make_x()` functions?

c++ language-lawyer move-semantics perfect-forwarding copy-elision asked Jan 12, 2018 at 12:23
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21 votes

Standard or custom exception in C++?

c++ exception standards asked Jan 20, 2011 at 13:29
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21 votes

How to explicitly instantiate a template for all members of MPL vector in C++?

c++ boost vector boost-mpl explicit-instantiation asked Apr 19, 2011 at 11:24
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19 votes

Is the value of `this` pointer constant during the object's lifetime?

c++ this language-lawyer object-lifetime asked Jan 15, 2020 at 10:17
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Top Answers
50
Can I easily iterate over the values of a map using a range-based for loop?
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29
Parallel Loops in C++
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21
How do I output coloured text to a Linux terminal?
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18
Is it valid to override virtual function with pure specifier?
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17
Does the behavior of guaranteed copy elision depend on existence of user-defined copy constructor?
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17
Why does deleting the move constructor cause a compile error?
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15
Why allocate_at_least() in C++23?
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15
using std::is_same, why my function still can't work for 2 types
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15
How do I interpret a message payload without violating type aliasing rules?
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14
auto fail to deduce correct return type
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13
Why is my defaulted move constructor not noexcept?
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13
Why does std::tuple break small-size struct calling convention optimization in C++?
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12
How do c++ compilers find an extern variable?
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12
C++20 concepts: int not swappable_with int
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12
Move constructor called twice when move-constructing a std::function from a lambda that has by-value captures
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11
Get type contained in variant at run time in C++?
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11
Why does t+=i+'a' give the correct output while t=t+i+'a' gives an error?
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11
C++ Concepts: checking for template instantiation
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10
How to use omp parallel for and omp simd together?
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10
What is the difference between packaged_task and async
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10
How can I modify values in a map using range based for loop?
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10
Can b&&0 be optimized
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9
Anonymous constructor and destructor call in vector
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9
Is there an way to avoid writing constructors for all the types in a std::variant class member?
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9
Does Visual Studio 2017 need an explicit move constructor declaration?
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9
Does std::initializer_list heap allocate memory?
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9
uniform_real_distribution operator () compilation errors
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8
C++ NUMA Optimization
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8
Why does Expected<T> in LLVM implement two constructors for Expected<T>&&?
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8
Read uint8_t from std::stringstream as a numeric type
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