[Bug c++/94701] New: coroutines: Wrong code for structured bindings.
iains at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Tue Apr 21 20:14:28 GMT 2020
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94701
Bug ID: 94701
Summary: coroutines: Wrong code for structured bindings.
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: iains at gcc dot gnu.org
Target Milestone: ---
Created attachment 48330
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48330&action=edit
patch under test
As reported by Michał Dominiak, the following code gets an incorrect answer -
this is because we fail to check for DECL_VALUE_EXPR in the handling for local
vars.
struct promise;
struct future
{
using promise_type = promise;
};
struct promise
{
template<typename... Args>
promise (Args&... args) {}
coro::suspend_never initial_suspend() { return {}; }
coro::suspend_never final_suspend() { return {}; }
future get_return_object() { return {}; }
void return_value(int) {}
void unhandled_exception() {}
};
#include <cassert>
struct pair
{
int i;
};
pair
something ()
{
return { 1 };
}
future
my_coro ()
{
auto ret = something ();
assert(ret.i == 1);
auto [ i ] = something ();
assert(i == 1);
co_return 1;
}
int main ()
{
my_coro ();
}
More information about the Gcc-bugs
mailing list