derek.holloway
7502bf64a4
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68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
// RUN: %clang_cc1 -ast-dump -std=c++26 %s | FileCheck %s
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// Test this with PCH.
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// RUN: %clang_cc1 %s -std=c++26 -emit-pch -o %t %s
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// RUN: %clang_cc1 %s -std=c++26 -include-pch %t -ast-dump-all | FileCheck %s
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#ifndef PCH_HELPER
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#define PCH_HELPER
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template <unsigned N>
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void foo() {
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int arr[4] = {1, 2, 3, 4};
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auto [binding_1, ...binding_rest, binding_4] = arr;
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int arr_2[] = {binding_rest...};
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};
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// CHECK-LABEL: FunctionTemplateDecl {{.*}} foo
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// CHECK-LABEL: BindingDecl {{.*}} binding_1
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// CHECK-NEXT: ArraySubscriptExpr {{.*}}
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// CHECK-NEXT: ImplicitCastExpr
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// CHECK-NEXT: DeclRefExpr {{.*}}
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// CHECK-NEXT: IntegerLiteral {{.*}} 'int' 0
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// CHECK-NOT: BindingDecl
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// CHECK-LABEL: BindingDecl {{.*}} binding_rest
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// CHECK-NEXT: FunctionParmPackExpr
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// CHECK-LABEL: BindingDecl {{.*}} binding_4
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// CHECK-NEXT: ArraySubscriptExpr
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// CHECK-NEXT: ImplicitCastExpr {{.*}}
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// CHECK-NEXT: DeclRefExpr {{.*}} lvalue Decomposition {{.*}}
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// CHECK-NEXT: IntegerLiteral {{.*}} 'int' 3
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// CHECK-NOT: BindingDecl
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// CHECK-LABEL: VarDecl {{.*}} arr_2
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// CHECK-NEXT: InitListExpr
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// CHECK-NEXT: PackExpansionExpr {{.*}} '<dependent type>' lvalue
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// CHECK-NEXT: DeclRefExpr {{.*}} lvalue Binding {{.*}} 'binding_rest'
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struct tag_t { };
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template <unsigned N>
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void bar() {
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auto [...empty_binding_pack] = tag_t{};
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static_assert(sizeof...(empty_binding_pack) == 0);
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};
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// CHECK-LABEL: FunctionTemplateDecl {{.*}} bar
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// CHECK-NOT: BindingDecl
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// CHECK-LABEL: BindingDecl {{.*}} empty_binding_pack
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// CHECK-NEXT: FunctionParmPackExpr
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// CHECK: DeclStmt
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struct int_pair { int x; int y; };
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template <typename T>
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void baz() {
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auto [binding_1, binding_2, ...empty_binding_pack] = T{};
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static_assert(sizeof...(empty_binding_pack) == 0);
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};
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void(*f)() = baz<int_pair>;
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// CHECK-LABEL: FunctionDecl {{.*}} baz {{.*}} implicit_instantiation
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// CHECK-NEXT: TemplateArgument type 'int_pair'
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// CHECK: BindingDecl {{.*}} binding_1
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// CHECK: BindingDecl {{.*}} binding_2
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// CHECK-NOT: BindingDecl
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// CHECK-LABEL: BindingDecl {{.*}} empty_binding_pack
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// CHECK-NEXT: FunctionParmPackExpr
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// CHECK: DeclStmt
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#endif
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