clang/test/CodeCompletion/lambdas.cpp

   1 template <class T>
   2 struct function {
   3 };
   4
   5
   6 void test() {
   7   void (*x)(int, double) = nullptr;
   8
   9   function<void(int, double)> y = {};
  10   // RUN: %clang_cc1 -fsyntax-only -code-completion-patterns -code-completion-at=%s:%(line-3):28 %s -o - | FileCheck -check-prefix=CHECK-1 %s
  11   // RUN: %clang_cc1 -fsyntax-only -code-completion-patterns -code-completion-at=%s:%(line-2):35 %s -o - | FileCheck -check-prefix=CHECK-1 %s
  12   // CHECK-1: COMPLETION: Pattern : [<#=#>](int <#parameter#>, double <#parameter#>) { <#body#> }
  13
  14   // == Placeholders for suffix types must be placed properly.
  15   function<void(void(*)(int))> z = {};
  16   // RUN: %clang_cc1 -fsyntax-only -code-completion-patterns -code-completion-at=%s:%(line-1):36 %s -o - | FileCheck -check-prefix=CHECK-2 %s
  17   // CHECK-2: COMPLETION: Pattern : [<#=#>](void (* <#parameter#>)(int)) { <#body#> }
  18
  19   // == No need for a parameter list if function has no parameters.
  20   function<void()> a = {};
  21   // RUN: %clang_cc1 -fsyntax-only -code-completion-patterns -code-completion-at=%s:%(line-1):24 %s -o - | FileCheck -check-prefix=CHECK-3 %s
  22   // CHECK-3: COMPLETION: Pattern : [<#=#>] { <#body#> }
  23 }
  24
  25 template <class T, class Allocator = int>
  26 struct vector {};
  27
  28 void test2() {
  29   // == Try to preserve types as written.
  30   function<void(vector<int>)> a = {};
  31
  32   using function_typedef = function<void(vector<int>)>;
  33   function_typedef b = {};
  34   // RUN: %clang_cc1 -fsyntax-only -code-completion-patterns -code-completion-at=%s:%(line-4):35 %s -o - | FileCheck -check-prefix=CHECK-4 %s
  35   // RUN: %clang_cc1 -fsyntax-only -code-completion-patterns -code-completion-at=%s:%(line-2):24 %s -o - | FileCheck -check-prefix=CHECK-4 %s
  36   // CHECK-4: COMPLETION: Pattern : [<#=#>](vector<int> <#parameter#>) { <#body#> }
  37 }
  38
  39 // Check another common function wrapper name.
  40 template <class T> struct unique_function {};
  41
  42 void test3() {
  43   unique_function<void()> a = {};
  44   // RUN: %clang_cc1 -fsyntax-only -code-completion-patterns -code-completion-at=%s:%(line-1):31 %s -o - | FileCheck -check-prefix=CHECK-5 %s
  45   // CHECK-5: COMPLETION: Pattern : [<#=#>] { <#body#> }
  46 }
  47
  48 template <class T, class U> struct weird_function {};
  49 void test4() {
  50   weird_function<void(), int> b = {};
  51   // RUN: %clang_cc1 -fsyntax-only -code-completion-patterns -code-completion-at=%s:%(line-1):35 %s -o - | FileCheck -check-prefix=CHECK-6 %s
  52   // CHECK-6-NOT: COMPLETION: Pattern : [<#=
  53 }
  54
  55 void test5() {
  56   // Completions are only added when -code-completion-patterns are enabled.
  57   function<void()> b = {};
  58   // RUN: %clang_cc1 -fsyntax-only -code-completion-patterns -code-completion-at=%s:%(line-1):24 %s -o - | FileCheck -check-prefix=CHECK-7 %s
  59   // CHECK-7: COMPLETION: Pattern : [<#=
  60   // RUN: %clang_cc1 -fsyntax-only -code-completion-at=%s:%(line-3):24 %s -o - | FileCheck -check-prefix=CHECK-8 %s
  61   // CHECK-8-NOT: COMPLETION: Pattern : [<#=
  62 }
  63
  64 void test6() {
  65   auto my_lambda = [&](int a, double &b) { return 1.f; };
  66   // RUN: %clang_cc1 -fsyntax-only -code-completion-at=%s:%(line-1):58 %s -o - | FileCheck -check-prefix=CHECK-9 %s
  67   // CHECK-9: [#float#]my_lambda(<#int a#>, <#double &b#>)[# const#]
  68 }
  69
  70 void test7() {
  71   auto generic_lambda = [&](auto a, const auto &b) { return a + b; };
  72   // RUN: %clang_cc1 -fsyntax-only -code-completion-at=%s:%(line-1):70 %s -o - | FileCheck -check-prefix=CHECK-10 %s
  73   // CHECK-10: [#auto#]generic_lambda(<#auto a#>, <#const auto &b#>)[# const#]
  74 }