catch without try compiling successfully

Question

The following code compiles successfully with g++ version 5.1.0. Notice the catch without a corresponding try in the member function foo::bar(). I was wondering if this syntax was legal and if so what effect it had?

struct foo
{
  void bar()
  {
  }
  catch (...)
  {
  }
};

int main ()
{
  foo f;
  f.bar();
  return 0;
}

Originally seen in Catch block in constructor without try

Answer 1

The example you give,

struct foo
{
  void bar()
  {
  }
  catch (...)
  {
  }
};

… is not valid standard C++.

It might be a g++ language extension.

The catches in the question you linked to look like function catch blocks, except that also that requires a try keyword.