What made i = i++ + 1; legal in C++17?
Before you start yelling undefined behaviour, this is explicitly listed in N4659 (C++17) i = i++ + 1; // the value of i … Read more
language-lawyer
Valid, but worthless syntax in switch-case?
Through a little typo, I accidentally found this construct: int main(void) { char foo = ‘c’; switch(foo) { printf(“Cant Touch This\n”); // This … Read more
What are Rust’s exact auto-dereferencing rules?
I’m learning/experimenting with Rust, and in all the elegance that I find in this language, there is one peculiarity that baffles me and … Read more
Why is f(i = -1, i = -1) undefined behavior?
I was reading about order of evaluation violations, and they give an example that puzzles me. 1) If a side effect on a … Read more
Is main a valid Java identifier?
One of my kids is taking Java in high school and had this on one of his tests: Which of the following is … Read more
Can C++ code be valid in both C++03 and C++11 but do different things?
Is it possible for C++ code to conform to both the C++03 standard and the C++11 standard, but do different things depending on … Read more
A positive lambda: ‘+[]{}’ – What sorcery is this? [duplicate]
This question already has an answer here: Resolving ambiguous overload on function pointer and std::function for a lambda using + (unary plus) (1 … Read more
int a[] = {1,2,}; Why is a trailing comma in an initializer-list allowed?
Maybe I am not from this planet, but it would seem to me that the following should be a syntax error: int a[] … Read more
How many levels of pointers can we have?
How many pointers (*) are allowed in a single variable? Let’s consider the following example. int a = 10; int *p = &a; … Read more
In CSS Flexbox, why are there no “justify-items” and “justify-self” properties?
Consider the main axis and cross axis of a flex container: Source: W3C To align flex items along the main axis there is … Read more