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How do I read an entire file into a std::string in C++?
...ndant copies is to do the reading manually in a loop, unfortunately. Since C++ now has guaranteed contiguous strings, one could write the following (≥C++14):
auto read_file(std::string_view path) -> std::string {
constexpr auto read_size = std::size_t{4096};
auto stream = std::ifstream...
What is __gxx_personality_v0 for?
...r question. As mentioned on that answer, its use is defined by the Itanium C++ ABI, where it is called the Personality Routine.
The reason it "works" by defining it as a global NULL void pointer is probably because nothing is throwing an exception. When something tries to throw an exception, then y...
C++ convert vector to vector
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“static const” vs “#define” vs “enum”
...hink harder if you need to satisfy both at once.
If you were asking about C++, then you'd use option (1) — the static const — every time.
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print call stack in C or C++
Is there any way to dump the call stack in a running process in C or C++ every time a certain function is called? What I have in mind is something like this:
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Why does C++ require a user-provided default constructor to default-construct a const object?
The C++ standard (section 8.5) says:
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C++ mark as deprecated
I have a method in an interface that I want to deprecate with portable C++.
When I Googled for this all I got was a Microsoft specific solution; #pragma deprecated and __declspec(deprecated) .
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C++ Exceptions questions on rethrow of original exception
...Base destructor, this=0x98e70b0
Also see:
Scope of exception object in C++
Throwing ... "by reference"
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Why do C and C++ compilers allow array lengths in function signatures when they're never enforced?
... It is the same idea as the 1-D case. What looks like a 2-D array in C and C++ is actually a 1-D array, each element of which is another 1-D array. In this case we have an array with 10 elements, each element of which is "array of 20 ints". As described in my post, what actually gets passed to the...
how does array[100] = {0} set the entire array to 0?
...nd recursively applies this to aggregates).
The behavior of this code in C++ is described in section 8.5.1.7 of the C++ specification (online draft of C++ spec): the compiler aggregate-initializes the elements that don't have a specified value.
Also, note that in C++ (but not C), you can use an e...