When is a function try block useful?
c++, function, function-try-block
Solution
You use it in constructors to catch errors from initializers. Usually, you don't catch those errors, so this is a quite exceptional use.
Otherwise, it is useless: unless I'm proven wrong,
void f() try { ... } catch (...) { ... }
is strictly equivalent to
void f() { try { ... } catch (...) { ... } }
Problem
I'm wondering when programmers use function try blocks. When is it useful? ``` void f(int i) try { if ( i < 0 ) throw "less than zero"; std::cout << "greater than zero" << std::endl; } catch(const char* e) { std::cout << e << std::endl; } int main() { f(1); f(-1); return 0; } ``` Output: (at ideone) ``` greater than zero less than zero ``` EDIT: As some people might think that the syntax of function defintion is incorrect (because the syntax doesn't look familiar), I've to say that no its not incorrect. Its called function-try-block. See §8.4/1 [dcl.fct.def] in the C++ Standard.