Steven Watanabe <steven <at> providere-consulting.com> writes:
AMDG
The local structs are not essential. You can use tuples.
I like this idea.
I too would definitely like to see something like
int main() {
int i = 0;
BOOST_LOCAL_FUNCTION(f, (i), (int, v)) { i = v; } BOOST_LOCAL_FUNCTION_END;
f(2); // i = 2
}
How about this? int BOOST_LOCAL_FUNCTION( (v) ) (int i) { return v = i; } BOOST_LOCAL_FUNCTION_END You can think of it as if BOOST_LOCAL_FUNCTION macro invocation has been expanded to local function name. I'm not sure that it's possible in typeof emulation, though :( Here is how this construction looks after preprocessing: // Line 1. int (*sig_1)(); typedef typeof(v) typeof_v_1; typedef boost::tuple<typeof_v_1&> tuple_t_1; tuple_t_1 tuple_1(v); { // __LINE__ suffix can be omitted inside this block. typedef typeof(sig_1()) result_t; typedef tuple_t_1 tuple_t; tuple_t& tuple = tuple_1; struct scope_exit_body_t { typeof_v_1& v; scope_exit_body_t(tuple_t& tuple) : v(tuple.get<0>()) {} result_t // Lines 2-5. operator()(int i) const { return i = v; } // Line 6. }; typedef typeof(&scope_exit_body_t::operator()) native_typeof_only; }
In Christ, Steven Watanabe
-- Alexander