1// RUN: %clang_cc1 %s -verify
2
3// expected-no-diagnostics
4
5namespace PromotionVersusMutation {
6  typedef unsigned Unsigned;
7  typedef signed Signed;
8
9  struct T { unsigned n : 2; } t;
10
11  typedef __typeof__(t.n) Unsigned; // Bitfield is unsigned
12  typedef __typeof__(+t.n) Signed;  // ... but promotes to signed.
13
14  typedef __typeof__(t.n + 0) Signed; // Arithmetic promotes.
15
16  typedef __typeof__(t.n = 0) Unsigned;  // Assignment produces an lvalue...
17  typedef __typeof__(t.n += 0) Unsigned;
18  typedef __typeof__(t.n *= 0) Unsigned;
19  typedef __typeof__(+(t.n = 0)) Signed;  // ... which is a bit-field.
20  typedef __typeof__(+(t.n += 0)) Signed;
21  typedef __typeof__(+(t.n *= 0)) Signed;
22
23  typedef __typeof__(++t.n) Unsigned; // Increment is equivalent to compound-assignment.
24  typedef __typeof__(--t.n) Unsigned;
25  typedef __typeof__(+(++t.n)) Signed;
26  typedef __typeof__(+(--t.n)) Signed;
27
28  typedef __typeof__(t.n++) Unsigned; // Post-increment's result has the type
29  typedef __typeof__(t.n--) Unsigned; // of the operand...
30  typedef __typeof__(+(t.n++)) Unsigned; // ... and is not a bit-field (because
31  typedef __typeof__(+(t.n--)) Unsigned; // it's not a glvalue).
32}
33