1 // No PCH:
2 // RUN: %clang_cc1 -pedantic -std=c++1y -include %s -include %s -verify %s
3 //
4 // With chained PCH:
5 // RUN: %clang_cc1 -pedantic -std=c++1y -emit-pch %s -o %t.a
6 // RUN: %clang_cc1 -pedantic -std=c++1y -include-pch %t.a -emit-pch %s -o %t.b
7 // RUN: %clang_cc1 -pedantic -std=c++1y -include-pch %t.b -verify %s
8 
9 // expected-no-diagnostics
10 
11 #if !defined(HEADER1)
12 #define HEADER1
13 
14 auto &f(int &);
15 
16 template<typename T> decltype(auto) g(T &t) {
17   return f(t);
18 }
19 
20 #elif !defined(HEADER2)
21 #define HEADER2
22 
23 // Ensure that this provides an update record for the type of HEADER1's 'f',
24 // so that HEADER1's 'g' can successfully call it.
25 auto &f(int &n) {
26   return n;
27 }
28 
29 #else
30 
31 int n;
32 int &k = g(n);
33 
34 #endif
35