clang/test/FixIt/fixit-c++2a.cpp

   1 // RUN: %clang_cc1 -verify -std=c++2a -pedantic-errors %s
   2 // RUN: cp %s %t
   3 // RUN: not %clang_cc1 -x c++ -std=c++2a -fixit %t
   4 // RUN: %clang_cc1 -Wall -pedantic-errors -x c++ -std=c++2a %t
   5 // RUN: cat %t | FileCheck %s
   6
   7 /* This is a test of the various code modification hints that only
   8    apply in C++2a. */
   9 template<typename ...T> void init_capture_pack(T ...a) {
  10   [x... = a]{}; // expected-error {{must appear before the name}}
  11   [x = a...]{}; // expected-error {{must appear before the name}}
  12   [...&x = a]{}; // expected-error {{must appear before the name}}
  13   [...a]{}; // expected-error {{must appear after the name}}
  14   [&...a]{}; // expected-error {{must appear after the name}}
  15   [...&a]{}; // expected-error {{must appear after the name}}
  16 }
  17
  18 namespace constinit_mismatch {
  19   int b = 123; // expected-note {{add the 'constinit' specifier}}
  20   extern constinit int b; // expected-error {{'constinit' specifier added after initialization of variable}}
  21   // CHECK: {{^}}  extern int b;
  22
  23   template<typename> struct X {
  24     template<int> static constinit int n; // expected-note {{constinit}}
  25   };
  26   template<typename T> template<int N>
  27   int X<T>::n = 123; // expected-error {{missing}}
  28   // CHECK: {{^}}  constinit int X<T>::n = 123;
  29
  30 #define ABSL_CONST_INIT [[clang::require_constant_initialization]]
  31   extern constinit int c; // expected-note {{constinit}}
  32   int c; // expected-error {{missing}}
  33   // CHECK: {{^}}  ABSL_CONST_INIT int c;
  34
  35 #define MY_CONST_INIT constinit
  36   extern constinit int d; // expected-note {{constinit}}
  37   int d; // expected-error {{missing}}
  38   // CHECK: {{^}}  MY_CONST_INIT int d;
  39 #undef MY_CONST_INIT
  40
  41   extern constinit int e; // expected-note {{constinit}}
  42   int e; // expected-error {{missing}}
  43   // CHECK: {{^}}  ABSL_CONST_INIT int e;
  44 #undef ABSL_CONST_INIT
  45 }