The Daily C++ via @like
Tags: #stackoverflow #Stroustrup
At which point occurs template Instantiation binding?
https://stackoverflow.com/questions/39959072/at-which-point-occurs-template-instantiation-binding
At which point occurs template Instantiation binding?
https://stackoverflow.com/questions/39959072/at-which-point-occurs-template-instantiation-binding
Stackoverflow
At which point occurs template Instantiation binding?
This code is from "C++ programming language" by Bjarne Stroustrup (C.13.8.3 Point of Instantiation Binding)
template
void f(T value)
{
g(value);
}
void g(int v);
void h()
{
template
void f(T value)
{
g(value);
}
void g(int v);
void h()
{
Tags: #stackoverflow #lambdas #generic
Why generic lambdas are allowed while nested structs with templated methods aren't?
https://stackoverflow.com/questions/40242505/why-generic-lambdas-are-allowed-while-nested-structs-with-templated-methods-aren
Why generic lambdas are allowed while nested structs with templated methods aren't?
https://stackoverflow.com/questions/40242505/why-generic-lambdas-are-allowed-while-nested-structs-with-templated-methods-aren
Stackoverflow
Why generic lambdas are allowed while nested structs with templated methods aren't?
As far as I understand - generic lambdas are transformed into objects of local scope structs with templated operator(). This makes generic lambda very powerful and easy to use tool. On the other ha...
Tags #stackoverflow
What is the rationale behind decltype behavior?
https://stackoverflow.com/questions/40282118/what-is-the-rationale-behind-decltype-behavior#
What is the rationale behind decltype behavior?
https://stackoverflow.com/questions/40282118/what-is-the-rationale-behind-decltype-behavior#
Stackoverflow
What is the rationale behind decltype behavior?
As I understood in C++11 decltype(expression) is used to deduce the exact same type of the given expression. But when the expression is put into parentheses itself, then the deduces type is lvalue
Tags: #stackoverflow
C++ Get min / max value of a static constexpr array at compile time
https://stackoverflow.com/questions/40285548/c-get-min-max-value-of-a-static-constexpr-array-at-compile-time
C++ Get min / max value of a static constexpr array at compile time
https://stackoverflow.com/questions/40285548/c-get-min-max-value-of-a-static-constexpr-array-at-compile-time
Stackoverflow
C++ Get min / max value of a static constexpr array at compile time
Let's say I have an array of integers defined like that:
static const int IntArray[] = {1, 5, 10, 12, 17};
Is there a way to the minimum or maximum value at compile time?
UPDATE 1
Thanks to the
static const int IntArray[] = {1, 5, 10, 12, 17};
Is there a way to the minimum or maximum value at compile time?
UPDATE 1
Thanks to the
Tags: #stackoverflow #performance #asm #codefaster
Why is this C++ code faster than assembly?
https://stackoverflow.com/questions/40354978/why-is-this-c-code-faster-than-assembly
Why is this C++ code faster than assembly?
https://stackoverflow.com/questions/40354978/why-is-this-c-code-faster-than-assembly
Stackoverflow
Why is this C++ code faster than assembly?
I wrote these two solutions for Project Euler Q14, in assembly and in C++. They are the same identical brute force approach. The assembly solution was assembled with
nasm -felf64 p14.asm &&...
nasm -felf64 p14.asm &&...
Tags: #stackoverflow
https://stackoverflow.com/questions/40481286/why-does-the-size-of-this-stdstring-change-when-characters-are-changed
https://stackoverflow.com/questions/40481286/why-does-the-size-of-this-stdstring-change-when-characters-are-changed
Stackoverflow
Why does the size of this std::string change, when characters are changed?
I have an issue in which the size of the string is effected with the presence of a '\0' character. I searched all over in SO and could not get the answer still.
Here is the snippet.
int main()
{
...
Here is the snippet.
int main()
{
...
Tags: #stackoverflow #string
https://stackoverflow.com/questions/40592298/why-would-you-compare-a-with-0x41
https://stackoverflow.com/questions/40592298/why-would-you-compare-a-with-0x41
Stackoverflow
Why would you compare 'A' with 0x41?
I was looking at some C++ code and found the following construct:
if('A' == 0x41) {
// ...
} else if('A' == 0xc1) {
// ...
} else {
// ...
}
I get a Visual Studio warning saying:
Warning...
if('A' == 0x41) {
// ...
} else if('A' == 0xc1) {
// ...
} else {
// ...
}
I get a Visual Studio warning saying:
Warning...
Tags: #stackoverflow #binary #operator
https://stackoverflow.com/questions/40751662/is-a-b-255-255-the-same-as-a-b-255
https://stackoverflow.com/questions/40751662/is-a-b-255-255-the-same-as-a-b-255
Stack Overflow
Is ((a + (b & 255)) & 255) the same as ((a + b) & 255)?
I was browsing some C++ code, and found something like this:
(a + (b & 255)) & 255
The double AND annoyed me, so I thought of:
(a + b) & 255
(a and b are 32-bit unsigned integers)
I
(a + (b & 255)) & 255
The double AND annoyed me, so I thought of:
(a + b) & 255
(a and b are 32-bit unsigned integers)
I
Tags: #bool #ternary #stackoverflow
https://stackoverflow.com/questions/43139144/why-is-the-ternary-operator-used-to-define-1-and-0-in-a-macro
https://stackoverflow.com/questions/43139144/why-is-the-ternary-operator-used-to-define-1-and-0-in-a-macro
Stackoverflow
Why is the ternary operator used to define 1 and 0 in a macro?
I'm using an SDK for an embedded project. In this source code I found some code which at least I found peculiar. In many places in the SDK there is source code in this format:
#define ATCI_IS_LOWER(
#define ATCI_IS_LOWER(
Tags: #stackoverflow #if vs #ifelse
https://stackoverflow.com/questions/43202012/if-statement-vs-if-else-statement-which-is-faster
https://stackoverflow.com/questions/43202012/if-statement-vs-if-else-statement-which-is-faster
Stack Overflow
If statement vs if-else statement, which is faster?
I argued with a friend the other day about those two snippets. Which is faster and why ?
value = 5;
if (condition) {
value = 6;
}
and:
if (condition) {
value = 6;
} else {
value = 5;...
value = 5;
if (condition) {
value = 6;
}
and:
if (condition) {
value = 6;
} else {
value = 5;...