clang/test/AST/ast-dump-concepts.cpp

   1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -std=c++2a -ast-dump -ast-dump-filter Foo %s | FileCheck -strict-whitespace %s
   2
   3 // Test with serialization:
   4 // RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-unknown -emit-pch -o %t %s
   5 // RUN: %clang_cc1 -x c++ -std=c++20 -triple x86_64-unknown-unknown -include-pch %t \
   6 // RUN: -ast-dump-all -ast-dump-filter Foo /dev/null \
   7 // RUN: | FileCheck --strict-whitespace %s
   8
   9 template <typename T>
  10 concept unary_concept = true;
  11
  12 template <typename T, typename U>
  13 concept binary_concept = true;
  14
  15 template <typename... Ts>
  16 concept variadic_concept = true;
  17
  18 template <typename T>
  19 struct Foo {
  20   // CHECK:      TemplateTypeParmDecl {{.*}} referenced Concept {{.*}} 'binary_concept'
  21   // CHECK-NEXT: `-ConceptSpecializationExpr {{.*}} <col:13, col:31> 'bool' Concept {{.*}} 'binary_concept'
  22   // CHECK-NEXT:   |-TemplateArgument {{.*}} type 'R'
  23   // CHECK-NEXT:   | `-TemplateTypeParmType {{.*}} 'R'
  24   // CHECK-NEXT:   |   `-TemplateTypeParm {{.*}} 'R'
  25   // CHECK-NEXT:   `-TemplateArgument {{.*}} type 'int'
  26   // CHECK-NEXT:     `-BuiltinType {{.*}} 'int'
  27   template <binary_concept<int> R>
  28   Foo(R);
  29
  30   // CHECK:      TemplateTypeParmDecl {{.*}} referenced Concept {{.*}} 'unary_concept'
  31   // CHECK-NEXT: `-ConceptSpecializationExpr {{.*}} <col:13> 'bool'
  32   template <unary_concept R>
  33   Foo(R);
  34
  35   // CHECK:      FunctionTemplateDecl {{.*}} <line:[[@LINE+1]]:3, line:[[@LINE+2]]:39> {{.*}} Foo<T>
  36   template <typename R>
  37   Foo(R, int) requires unary_concept<R>;
  38
  39   // CHECK:      FunctionTemplateDecl {{.*}} <line:[[@LINE+1]]:3, line:[[@LINE+3]]:3> {{.*}} Foo<T>
  40   template <typename R>
  41   Foo(R, char) requires unary_concept<R> {
  42   }
  43
  44   // CHECK: CXXFoldExpr {{.*}} <col:13, col:29>
  45   template <variadic_concept... Ts>
  46   Foo();
  47
  48   // CHECK: CXXFoldExpr {{.*}} <col:13, col:34>
  49   template <variadic_concept<int>... Ts>
  50   Foo();
  51 };