pythonc++loopsfor-loopbreak

Is there an equivalent to the "for ... else" Python loop in C++?

Python has an interesting for statement which lets you specify an else clause.

In a construct like this one:

for i in foo:
  if bar(i):
    break
else:
  baz()

the else clause is executed after the for, but only if the for terminates normally (not by a break).

I wondered if there was an equivalent in C++? Can I use for ... else?

Solution

  • A simpler way to express your actual logic is with std::none_of:

    if (std::none_of(std::begin(foo), std::end(foo), bar))
    baz();

    If the range proposal for C++17 gets accepted, hopefully this will simplify to:

    if (std::none_of(foo, bar)) baz();