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Clang vs GCC - which produces faster binaries? [closed]
...p-to-date albeit narrow findings of mine with GCC 4.7.2
and Clang 3.2 for C++.
UPDATE: GCC 4.8.1 v clang 3.3 comparison appended below.
UPDATE: GCC 4.8.2 v clang 3.4 comparison is appended to that.
I maintain an OSS tool that is built for Linux with both GCC and Clang,
and with Microsoft's compi...
What is array to pointer decay?
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It's said that arrays "decay" into pointers. A C++ array declared as int numbers [5] cannot be re-pointed, i.e. you can't say numbers = 0x5a5aff23. More importantly the term decay signifies loss of type and dimension; numbers decay into int* by losing the dimension inform...
Why I cannot cout a string?
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+1: Many STL headers in Visual C++ (including <iostream>) pull in a definition of the std::basic_string class (because they indirectly include the implementation-defined <xstring> header (never include that directly)). While that allows you to ...
What is the meaning of “… …” token? i.e. double ellipsis operator on parameter pack
While browsing through gcc's current implementation of new C++11 headers, I stumbled upon "......" token. You can check, that the following code compiles fine [via ideone.com].
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Copy constructor for a class with unique_ptr
...for a class that has a unique_ptr member variable? I am only considering C++11.
6 Answers
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How does Go compile so quickly?
...e talk Go at Google, which compares the dependency analysyis approach of C/C++ and Go.
That is the main reason of fast compilation. And this is by design.
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Can inner classes access private variables?
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Technically in the current C++ standard, a nested class does NOT have special access to its enclosing class. See sec 11.8.1 of the standard. HOWEVER see also this standard defect: open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#45
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Difference between `constexpr` and `const`
...sert are allowed. (= default and = delete are allowed, too, though.)
As of C++14, the rules are more relaxed, what is allowed since then inside a constexpr function: asm declaration, a goto statement, a statement with a label other than case and default, try-block, the definition of a variable of no...
When should I use the new keyword in C++?
I've been using C++ for a short while, and I've been wondering about the new keyword. Simply, should I be using it, or not?
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Inherit from a generic base class, apply a constraint, and implement an interface in C#
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C++ requires that a class declaration end in a semicolon. Many C# developers come from a C++ background; sometimes their fingers put the semicolon in without their brains getting involved. :-) There are a number of constructs...