clang/test/AST/ast-dump-APValue-union.cpp

   1 // Test without serialization:
   2 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -Wno-unused-value -std=gnu++17 \
   3 // RUN:            -ast-dump %s -ast-dump-filter Test \
   4 // RUN: | FileCheck --strict-whitespace --match-full-lines %s
   5 //
   6 // Test with serialization:
   7 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -Wno-unused-value -std=gnu++17 -emit-pch -o %t %s
   8 // RUN: %clang_cc1 -x c++ -triple x86_64-unknown-unknown -Wno-unused-value -std=gnu++17 \
   9 // RUN:           -include-pch %t -ast-dump-all -ast-dump-filter Test /dev/null \
  10 // RUN: | sed -e "s/ <undeserialized declarations>//" -e "s/ imported//" \
  11 // RUN: | FileCheck --strict-whitespace --match-full-lines %s
  12
  13 union U0 {
  14   int i = 42;
  15   float f;
  16 };
  17
  18 union U1 {
  19   union Uinner {
  20     int i;
  21     float f = 3.1415f;
  22   } uinner;
  23 };
  24
  25 union U2 {
  26   union Uinner {
  27     double d;
  28     int arr[2] = {1, 2};
  29   } uinner;
  30 };
  31
  32 union U3 {
  33   union Uinner {
  34     double d = 3.1415;
  35     int arr[2];
  36   } uinner;
  37   float f;
  38 };
  39
  40 void Test() {
  41   constexpr U0 u0{};
  42   // CHECK:  | `-VarDecl {{.*}} <col:{{.*}}, col:{{.*}}> col:{{.*}} u0 'const U0':'const U0' constexpr listinit
  43   // CHECK-NEXT:  |   |-value: Union .i Int 42
  44
  45   constexpr U1 u1{};
  46   // CHECK:  | `-VarDecl {{.*}} <col:{{.*}}, col:{{.*}}> col:{{.*}} u1 'const U1':'const U1' constexpr listinit
  47   // CHECK-NEXT:  |   |-value: Union .uinner Union .f Float 3.141500e+00
  48
  49   constexpr U2 u2{};
  50   // CHECK:  | `-VarDecl {{.*}} <col:{{.*}}, col:{{.*}}> col:{{.*}} u2 'const U2':'const U2' constexpr listinit
  51   // CHECK-NEXT:  |   |-value: Union .uinner
  52   // CHECK-NEXT:  |   | `-Union .arr
  53   // CHECK-NEXT:  |   |   `-Array size=2
  54   // CHECK-NEXT:  |   |     `-elements: Int 1, Int 2
  55
  56   constexpr U3 u3a = {.f = 3.1415};
  57   // CHECK:  | `-VarDecl {{.*}} <col:{{.*}}, col:{{.*}}> col:{{.*}} u3a 'const U3':'const U3' constexpr cinit
  58   // CHECK-NEXT:  |   |-value: Union .f Float 3.141500e+00
  59
  60   constexpr U3 u3b = {.uinner = {}};
  61   // CHECK:    `-VarDecl {{.*}} <col:{{.*}}, col:{{.*}}> col:{{.*}} u3b 'const U3':'const U3' constexpr cinit
  62   // CHECK-NEXT:      |-value: Union .uinner Union .d Float 3.141500e+00
  63 }