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// { dg-do compile { target c++17 } }
struct A { bool a, b; };
struct B { int a, b; };
void
foo ()
{
auto [ a, b ] = A ();
for (; auto [ a, b ] = A (); ) // { dg-error "structured bindings in conditions only available with" "" { target c++23_down } }
; // { dg-error "could not convert '<structured bindings>' from 'A' to 'bool'" "" { target *-*-* } .-1 }
for (; false; auto [ a, b ] = A ()) // { dg-error "expected" }
;
if (auto [ a, b ] = A ()) // { dg-error "structured bindings in conditions only available with" "" { target c++23_down } }
; // { dg-error "could not convert '<structured bindings>' from 'A' to 'bool'" "" { target *-*-* } .-1 }
if (auto [ a, b ] = A (); auto [ c, d ] = A ()) // { dg-error "structured bindings in conditions only available with" "" { target c++23_down } }
; // { dg-error "could not convert '<structured bindings>' from 'A' to 'bool'" "" { target *-*-* } .-1 }
if (int d = 5; auto [ a, b ] = A ()) // { dg-error "structured bindings in conditions only available with" "" { target c++23_down } }
; // { dg-error "could not convert '<structured bindings>' from 'A' to 'bool'" "" { target *-*-* } .-1 }
switch (auto [ a, b ] = B ()) // { dg-error "structured bindings in conditions only available with" "" { target c++23_down } }
{ // { dg-error "switch quantity not an integer" "" { target *-*-* } .-1 }
case 2:
break;
}
switch (int d = 5; auto [ a, b ] = B ()) // { dg-error "structured bindings in conditions only available with" "" { target c++23_down } }
{ // { dg-error "switch quantity not an integer" "" { target *-*-* } .-1 }
case 2:
break;
}
A e = A ();
auto && [ c, d ] = e;
auto [ i, j ] = A (), [ k, l ] = A (); // { dg-error "expected" }
auto m = A (), [ n, o ] = A (); // { dg-error "expected" }
}
template <typename T>
auto [ a, b ] = A (); // { dg-error "expected" }
struct C
{
auto [ e, f ] = A (); // { dg-error "expected" }
mutable auto [ g, h ] = A (); // { dg-error "expected" }
virtual auto [ i, j ] = A (); // { dg-error "expected" }
explicit auto [ k, l ] = A (); // { dg-error "expected" }
friend auto [ m, n ] = A (); // { dg-error "expected" }
};
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