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kalman5 / PreamblePostamble-take7.cpp
Last active January 25, 2020 08:46
template <typename F>
void PrePost(F&& f) {
std::cout << "pre\n";
std::forward<F>(f)();
std::cout << "post\n";
}
@kalman5
kalman5 / PreamblePostamble-take6.cpp
Last active January 25, 2020 08:45
struct Foo {
void operator()() const & {
std::cout << "l-value" << "\n";
}
void operator()() const && {
std::cout << "r-value" << "\n";
}
};
@kalman5
kalman5 / RefQualified.cpp
Last active January 25, 2020 08:44
struct Foo {
// used when Foo instance is an l-value
void operator()() const & {
std::cout << "l-value" << "\n";
}
// used when Foo isntance is an r-value
void operator()() const && {
std::cout << "r-value" << "\n";
}
@kalman5
kalman5 / PreamblePostamble-take5.cpp
Last active January 25, 2020 08:42
template <typename F>
void PrePost(F&& f) {
std::cout << "pre\n";
f();
std::cout << "post\n";
}
int main() {
double a = 1.1;
double b = 2.2;
@kalman5
kalman5 / PreamblePostamble-take4.cpp
Last active January 25, 2020 08:39
template <typename F>
void PrePost(const F& f) {
std::cout << "pre\n";
f();
std::cout << "post\n";
}
int main() {
double a = 1.1;
double b = 2.2;
@kalman5
kalman5 / PreamblePostamble-take3.cpp
Last active January 24, 2020 23:07
template <typename F, typename... ARGS>
void PrePost(const F& f, ARGS&&...args) {
std::cout << "pre\n";
f(std::forward<ARGS>(args)...);
std::cout << "post\n";
}
int main() {
double a = 1.1;
double b = 2.2;
@kalman5
kalman5 / PreamblePostamble-take2.cpp
Last active January 25, 2020 08:36
template <typename F>
void PrePost(const F& f) {
std::cout << "pre\n";
f();
std::cout << "post\n";
}
int main() {
double a = 1.1;
double b = 2.2;
@kalman5
kalman5 / PreamblePostamble-take1.cpp
Last active January 24, 2020 22:54
void PrePost(const std::function<void(void)>& f) {
std::cout << "pre\n";
f();
std::cout << "post\n";
}
int main() {
double a = 1.1;
double b = 2.2;
double c = 3.3;
@kalman5
kalman5 / CompilerGame.cpp
Last active January 24, 2020 21:29
double a = 1.1;
double b = 2.2;
class __lambda__ {
public:
__lambda__(double& a, double& b):a_(a),b_(b) {}
void operator()() const {
std::cout << "a: " << a_ << " - b: " << b_ << "\n";
}
@kalman5
kalman5 / LambdaCall.cpp
Last active January 24, 2020 21:29
double a = 1.1;
double b = 2.2;
[&a, &b](){
std::cout << "a: " << a << " - b: " << b << "\n";
}();