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carbon-lang/toolchain/check/testdata/interop/cpp/impls/copy.carbon
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Geoff Romer ba6257891e Remove ValueParamPattern case from deduction (#6869) 
This case is redundant: when deducing against a runtime parameter
pattern, the type is all that matters, and the type is added to the
deduction earlier. Additionally deducing the same argument against
parameter's subpattern just creates duplicate work, because the
subpattern has the same type.
2026-03-10 21:15:38 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/convert.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/interop/cpp/impls/copy.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/impls/copy.carbon
// --- types.h
class Copyable {
public:
Copyable(const Copyable&);
};
class ExplicitCopy {
public:
explicit ExplicitCopy(const ExplicitCopy&);
};
class DeletedCopy {
public:
DeletedCopy(const DeletedCopy&) = delete;
};
class MoveOnly {
public:
MoveOnly(MoveOnly&&);
};
class DeletedMove {
public:
DeletedMove(DeletedMove&&) = delete;
};
class NonConstCopy {
public:
NonConstCopy(NonConstCopy&);
};
class AmbiguousCopy {
public:
AmbiguousCopy(const AmbiguousCopy&, int = 0);
AmbiguousCopy(const AmbiguousCopy&, char = 0);
};
class PrivateCopy {
private:
PrivateCopy(const PrivateCopy&);
};
class ProtectedCopy {
protected:
ProtectedCopy(const ProtectedCopy&);
};
// --- copy_copyable.carbon
library "[[@TEST_NAME]]";
import Cpp library "types.h";
fn CopyCopyable(c: Cpp.Copyable) -> Cpp.Copyable {
//@dump-sem-ir-begin
return c;
//@dump-sem-ir-end
}
fn CopyExplicitCopy(c: Cpp.ExplicitCopy) -> Cpp.ExplicitCopy {
//@dump-sem-ir-begin
return c;
//@dump-sem-ir-end
}
// --- fail_copy_noncopyable.carbon
library "[[@TEST_NAME]]";
import Cpp library "types.h";
fn CopyDeletedCopy(c: Cpp.DeletedCopy) -> Cpp.DeletedCopy {
// CHECK:STDERR: fail_copy_noncopyable.carbon:[[@LINE+8]]:10: error: attempt to use a deleted function [CppInteropParseError]
// CHECK:STDERR: 15 | return c;
// CHECK:STDERR: | ^
// CHECK:STDERR: fail_copy_noncopyable.carbon:[[@LINE-6]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./types.h:14:3: note: 'DeletedCopy' has been explicitly marked deleted here [CppInteropParseNote]
// CHECK:STDERR: 14 | DeletedCopy(const DeletedCopy&) = delete;
// CHECK:STDERR: | ^
// CHECK:STDERR:
return c;
}
fn CopyMoveOnly(c: Cpp.MoveOnly) -> Cpp.MoveOnly {
// CHECK:STDERR: fail_copy_noncopyable.carbon:[[@LINE+8]]:10: error: attempt to use a deleted function [CppInteropParseError]
// CHECK:STDERR: 27 | return c;
// CHECK:STDERR: | ^
// CHECK:STDERR: fail_copy_noncopyable.carbon:[[@LINE-18]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./types.h:19:3: note: copy constructor is implicitly deleted because 'MoveOnly' has a user-declared move constructor [CppInteropParseNote]
// CHECK:STDERR: 19 | MoveOnly(MoveOnly&&);
// CHECK:STDERR: | ^
// CHECK:STDERR:
return c;
}
fn CopyDeletedMove(c: Cpp.DeletedMove) -> Cpp.DeletedMove {
// CHECK:STDERR: fail_copy_noncopyable.carbon:[[@LINE+8]]:10: error: attempt to use a deleted function [CppInteropParseError]
// CHECK:STDERR: 39 | return c;
// CHECK:STDERR: | ^
// CHECK:STDERR: fail_copy_noncopyable.carbon:[[@LINE-30]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./types.h:24:3: note: copy constructor is implicitly deleted because 'DeletedMove' has a user-declared move constructor [CppInteropParseNote]
// CHECK:STDERR: 24 | DeletedMove(DeletedMove&&) = delete;
// CHECK:STDERR: | ^
// CHECK:STDERR:
return c;
}
fn CopyNonConstCopy(c: Cpp.NonConstCopy) -> Cpp.NonConstCopy {
// TODO: List candidates here.
// CHECK:STDERR: fail_copy_noncopyable.carbon:[[@LINE+7]]:10: error: cannot copy value of type `Cpp.NonConstCopy` [CopyOfUncopyableType]
// CHECK:STDERR: return c;
// CHECK:STDERR: ^
// CHECK:STDERR: fail_copy_noncopyable.carbon:[[@LINE+4]]:10: note: type `Cpp.NonConstCopy` does not implement interface `Core.Copy` [MissingImplInMemberAccessInContext]
// CHECK:STDERR: return c;
// CHECK:STDERR: ^
// CHECK:STDERR:
return c;
}
fn CopyAmbiguousCopy(c: Cpp.AmbiguousCopy) -> Cpp.AmbiguousCopy {
// TODO: List candidates here.
// CHECK:STDERR: fail_copy_noncopyable.carbon:[[@LINE+7]]:10: error: cannot copy value of type `Cpp.AmbiguousCopy` [CopyOfUncopyableType]
// CHECK:STDERR: return c;
// CHECK:STDERR: ^
// CHECK:STDERR: fail_copy_noncopyable.carbon:[[@LINE+4]]:10: note: type `Cpp.AmbiguousCopy` does not implement interface `Core.Copy` [MissingImplInMemberAccessInContext]
// CHECK:STDERR: return c;
// CHECK:STDERR: ^
// CHECK:STDERR:
return c;
}
fn CopyPrivateCopy(c: Cpp.PrivateCopy) -> Cpp.PrivateCopy {
// TODO: Note is missing location.
// CHECK:STDERR: fail_copy_noncopyable.carbon:[[@LINE+8]]:10: error: cannot access private member `PrivateCopy` of type `Cpp.PrivateCopy` [ClassInvalidMemberAccess]
// CHECK:STDERR: return c;
// CHECK:STDERR: ^
// CHECK:STDERR: fail_copy_noncopyable.carbon:[[@LINE-67]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./types.h:40:3: note: declared here [ClassMemberDeclaration]
// CHECK:STDERR: PrivateCopy(const PrivateCopy&);
// CHECK:STDERR: ^
// CHECK:STDERR:
return c;
}
fn CopyProtectedCopy(c: Cpp.ProtectedCopy) -> Cpp.ProtectedCopy {
// TODO: Note is missing location.
// CHECK:STDERR: fail_copy_noncopyable.carbon:[[@LINE+8]]:10: error: cannot access protected member `ProtectedCopy` of type `Cpp.ProtectedCopy` [ClassInvalidMemberAccess]
// CHECK:STDERR: return c;
// CHECK:STDERR: ^
// CHECK:STDERR: fail_copy_noncopyable.carbon:[[@LINE-80]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./types.h:45:3: note: declared here [ClassMemberDeclaration]
// CHECK:STDERR: ProtectedCopy(const ProtectedCopy&);
// CHECK:STDERR: ^
// CHECK:STDERR:
return c;
}
// --- copy_generically.carbon
library "[[@TEST_NAME]]";
import Cpp library "types.h";
fn Copy[T:! Core.Copy](c: T) -> T {
return c;
}
fn DoCopy(c: Cpp.Copyable) -> Cpp.Copyable {
//@dump-sem-ir-begin
return Copy(c);
//@dump-sem-ir-end
}
class Wrap(T:! Core.Copy) {}
fn EqualWitnesses(p: Wrap(Cpp.Copyable)*) -> Wrap(Cpp.Copyable)* {
//@dump-sem-ir-begin
return p;
//@dump-sem-ir-end
}
// CHECK:STDOUT: --- copy_copyable.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %Copyable: type = class_type @Copyable [concrete]
// CHECK:STDOUT: %Copy.type: type = facet_type <@Copy> [concrete]
// CHECK:STDOUT: %Copyable.Copyable.type: type = fn_type @Copyable.Copyable [concrete]
// CHECK:STDOUT: %Copyable.Copyable: %Copyable.Copyable.type = struct_value () [concrete]
// CHECK:STDOUT: %const.622: type = const_type %Copyable [concrete]
// CHECK:STDOUT: %ptr.29d: type = ptr_type %const.622 [concrete]
// CHECK:STDOUT: %ptr.e47: type = ptr_type %Copyable [concrete]
// CHECK:STDOUT: %Copyable__carbon_thunk.type: type = fn_type @Copyable__carbon_thunk [concrete]
// CHECK:STDOUT: %Copyable__carbon_thunk: %Copyable__carbon_thunk.type = struct_value () [concrete]
// CHECK:STDOUT: %Copyable.Op.type: type = fn_type @Copyable.Op [concrete]
// CHECK:STDOUT: %Copyable.Op: %Copyable.Op.type = struct_value () [concrete]
// CHECK:STDOUT: %custom_witness.847: <witness> = custom_witness (%Copyable.Op), @Copy [concrete]
// CHECK:STDOUT: %Copy.facet.c39: %Copy.type = facet_value %Copyable, (%custom_witness.847) [concrete]
// CHECK:STDOUT: %Copy.WithSelf.Op.type.4d1: type = fn_type @Copy.WithSelf.Op, @Copy.WithSelf(%Copy.facet.c39) [concrete]
// CHECK:STDOUT: %.75c: type = fn_type_with_self_type %Copy.WithSelf.Op.type.4d1, %Copy.facet.c39 [concrete]
// CHECK:STDOUT: %ExplicitCopy: type = class_type @ExplicitCopy [concrete]
// CHECK:STDOUT: %ExplicitCopy.ExplicitCopy.type: type = fn_type @ExplicitCopy.ExplicitCopy [concrete]
// CHECK:STDOUT: %ExplicitCopy.ExplicitCopy: %ExplicitCopy.ExplicitCopy.type = struct_value () [concrete]
// CHECK:STDOUT: %const.d8d: type = const_type %ExplicitCopy [concrete]
// CHECK:STDOUT: %ptr.093: type = ptr_type %const.d8d [concrete]
// CHECK:STDOUT: %ptr.84c: type = ptr_type %ExplicitCopy [concrete]
// CHECK:STDOUT: %ExplicitCopy__carbon_thunk.type: type = fn_type @ExplicitCopy__carbon_thunk [concrete]
// CHECK:STDOUT: %ExplicitCopy__carbon_thunk: %ExplicitCopy__carbon_thunk.type = struct_value () [concrete]
// CHECK:STDOUT: %ExplicitCopy.Op.type: type = fn_type @ExplicitCopy.Op [concrete]
// CHECK:STDOUT: %ExplicitCopy.Op: %ExplicitCopy.Op.type = struct_value () [concrete]
// CHECK:STDOUT: %custom_witness.e04: <witness> = custom_witness (%ExplicitCopy.Op), @Copy [concrete]
// CHECK:STDOUT: %Copy.facet.b38: %Copy.type = facet_value %ExplicitCopy, (%custom_witness.e04) [concrete]
// CHECK:STDOUT: %Copy.WithSelf.Op.type.00a: type = fn_type @Copy.WithSelf.Op, @Copy.WithSelf(%Copy.facet.b38) [concrete]
// CHECK:STDOUT: %.dc2: type = fn_type_with_self_type %Copy.WithSelf.Op.type.00a, %Copy.facet.b38 [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Copyable.Copyable.decl: %Copyable.Copyable.type = fn_decl @Copyable.Copyable [concrete = constants.%Copyable.Copyable] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: %Copyable__carbon_thunk.decl: %Copyable__carbon_thunk.type = fn_decl @Copyable__carbon_thunk [concrete = constants.%Copyable__carbon_thunk] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: %ExplicitCopy.ExplicitCopy.decl: %ExplicitCopy.ExplicitCopy.type = fn_decl @ExplicitCopy.ExplicitCopy [concrete = constants.%ExplicitCopy.ExplicitCopy] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: %ExplicitCopy__carbon_thunk.decl: %ExplicitCopy__carbon_thunk.type = fn_decl @ExplicitCopy__carbon_thunk [concrete = constants.%ExplicitCopy__carbon_thunk] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @CopyCopyable(%c.param: %Copyable) -> out %return.param: %Copyable {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %c.ref: %Copyable = name_ref c, %c
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %impl.elem0: %.75c = impl_witness_access constants.%custom_witness.847, element0 [concrete = constants.%Copyable.Op]
// CHECK:STDOUT: %bound_method: <bound method> = bound_method %c.ref, %impl.elem0
// CHECK:STDOUT: %.loc8_10.1: ref %Copyable = temporary_storage
// CHECK:STDOUT: %Op.ref: %Copyable.Copyable.type = name_ref Op, imports.%Copyable.Copyable.decl [concrete = constants.%Copyable.Copyable]
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %.loc8_10.2: ref %Copyable = value_as_ref %c.ref
// CHECK:STDOUT: %addr.loc8_10.1: %ptr.e47 = addr_of %.loc8_10.2
// CHECK:STDOUT: %.loc8_10.3: %ptr.29d = as_compatible %addr.loc8_10.1
// CHECK:STDOUT: %.loc8_10.4: %ptr.29d = converted %addr.loc8_10.1, %.loc8_10.3
// CHECK:STDOUT: %addr.loc8_10.2: %ptr.e47 = addr_of %.loc6_40.1
// CHECK:STDOUT: %Copyable__carbon_thunk.call: init %empty_tuple.type = call imports.%Copyable__carbon_thunk.decl(%.loc8_10.4, %addr.loc8_10.2)
// CHECK:STDOUT: %.loc8_10.5: init %Copyable to %.loc6_40.1 = mark_in_place_init %Copyable__carbon_thunk.call
// CHECK:STDOUT: return %.loc8_10.5 to %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @CopyExplicitCopy(%c.param: %ExplicitCopy) -> out %return.param: %ExplicitCopy {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %c.ref: %ExplicitCopy = name_ref c, %c
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %impl.elem0: %.dc2 = impl_witness_access constants.%custom_witness.e04, element0 [concrete = constants.%ExplicitCopy.Op]
// CHECK:STDOUT: %bound_method: <bound method> = bound_method %c.ref, %impl.elem0
// CHECK:STDOUT: %.loc14_10.1: ref %ExplicitCopy = temporary_storage
// CHECK:STDOUT: %Op.ref: %ExplicitCopy.ExplicitCopy.type = name_ref Op, imports.%ExplicitCopy.ExplicitCopy.decl [concrete = constants.%ExplicitCopy.ExplicitCopy]
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %.loc14_10.2: ref %ExplicitCopy = value_as_ref %c.ref
// CHECK:STDOUT: %addr.loc14_10.1: %ptr.84c = addr_of %.loc14_10.2
// CHECK:STDOUT: %.loc14_10.3: %ptr.093 = as_compatible %addr.loc14_10.1
// CHECK:STDOUT: %.loc14_10.4: %ptr.093 = converted %addr.loc14_10.1, %.loc14_10.3
// CHECK:STDOUT: %addr.loc14_10.2: %ptr.84c = addr_of %.loc12_48.1
// CHECK:STDOUT: %ExplicitCopy__carbon_thunk.call: init %empty_tuple.type = call imports.%ExplicitCopy__carbon_thunk.decl(%.loc14_10.4, %addr.loc14_10.2)
// CHECK:STDOUT: %.loc14_10.5: init %ExplicitCopy to %.loc12_48.1 = mark_in_place_init %ExplicitCopy__carbon_thunk.call
// CHECK:STDOUT: return %.loc14_10.5 to %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- copy_generically.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Copy.type.fb2: type = facet_type <@Copy.1> [concrete]
// CHECK:STDOUT: %Copy.type.4b4: type = fn_type @Copy.loc6 [concrete]
// CHECK:STDOUT: %Copy: %Copy.type.4b4 = struct_value () [concrete]
// CHECK:STDOUT: %T.67d: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.type.2d4: type = fn_type @ptr.as.Copy.impl.Op, @ptr.as.Copy.impl(%T.67d) [symbolic]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.74e: %ptr.as.Copy.impl.Op.type.2d4 = struct_value () [symbolic]
// CHECK:STDOUT: %Copyable: type = class_type @Copyable [concrete]
// CHECK:STDOUT: %Copyable.Op.type: type = fn_type @Copyable.Op [concrete]
// CHECK:STDOUT: %Copyable.Op: %Copyable.Op.type = struct_value () [concrete]
// CHECK:STDOUT: %custom_witness.847: <witness> = custom_witness (%Copyable.Op), @Copy.1 [concrete]
// CHECK:STDOUT: %Copy.facet.c39: %Copy.type.fb2 = facet_value %Copyable, (%custom_witness.847) [concrete]
// CHECK:STDOUT: %Copy.specific_fn: <specific function> = specific_function %Copy, @Copy.loc6(%Copy.facet.c39) [concrete]
// CHECK:STDOUT: %Wrap.99f: type = class_type @Wrap, @Wrap(%Copy.facet.c39) [concrete]
// CHECK:STDOUT: %ptr.fba: type = ptr_type %Wrap.99f [concrete]
// CHECK:STDOUT: %Copy.impl_witness.146: <witness> = impl_witness imports.%Copy.impl_witness_table.c3a, @ptr.as.Copy.impl(%Wrap.99f) [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.type.45d: type = fn_type @ptr.as.Copy.impl.Op, @ptr.as.Copy.impl(%Wrap.99f) [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.96a: %ptr.as.Copy.impl.Op.type.45d = struct_value () [concrete]
// CHECK:STDOUT: %Copy.facet.9be: %Copy.type.fb2 = facet_value %ptr.fba, (%Copy.impl_witness.146) [concrete]
// CHECK:STDOUT: %Copy.WithSelf.Op.type.5f6: type = fn_type @Copy.WithSelf.Op, @Copy.WithSelf(%Copy.facet.9be) [concrete]
// CHECK:STDOUT: %.86b: type = fn_type_with_self_type %Copy.WithSelf.Op.type.5f6, %Copy.facet.9be [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %ptr.as.Copy.impl.Op.96a, @ptr.as.Copy.impl.Op(%Wrap.99f) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core.import_ref.203: @ptr.as.Copy.impl.%ptr.as.Copy.impl.Op.type (%ptr.as.Copy.impl.Op.type.2d4) = import_ref Core//prelude/parts/copy, loc{{\d+_\d+}}, loaded [symbolic = @ptr.as.Copy.impl.%ptr.as.Copy.impl.Op (constants.%ptr.as.Copy.impl.Op.74e)]
// CHECK:STDOUT: %Copy.impl_witness_table.c3a = impl_witness_table (%Core.import_ref.203), @ptr.as.Copy.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @DoCopy(%c.param: %Copyable) -> out %return.param: %Copyable {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Copy.ref: %Copy.type.4b4 = name_ref Copy, file.%Copy.decl [concrete = constants.%Copy]
// CHECK:STDOUT: %c.ref: %Copyable = name_ref c, %c
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %Copy.facet: %Copy.type.fb2 = facet_value constants.%Copyable, (constants.%custom_witness.847) [concrete = constants.%Copy.facet.c39]
// CHECK:STDOUT: %.loc12: %Copy.type.fb2 = converted constants.%Copyable, %Copy.facet [concrete = constants.%Copy.facet.c39]
// CHECK:STDOUT: %Copy.specific_fn: <specific function> = specific_function %Copy.ref, @Copy.loc6(constants.%Copy.facet.c39) [concrete = constants.%Copy.specific_fn]
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %Copy.call: init %Copyable to %.loc10_34.1 = call %Copy.specific_fn(%c.ref)
// CHECK:STDOUT: return %Copy.call to %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @EqualWitnesses(%p.param: %ptr.fba) -> out %return.param: %ptr.fba {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %p.ref: %ptr.fba = name_ref p, %p
// CHECK:STDOUT: %impl.elem0: %.86b = impl_witness_access constants.%Copy.impl_witness.146, element0 [concrete = constants.%ptr.as.Copy.impl.Op.96a]
// CHECK:STDOUT: %bound_method.loc20_10.1: <bound method> = bound_method %p.ref, %impl.elem0
// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @ptr.as.Copy.impl.Op(constants.%Wrap.99f) [concrete = constants.%ptr.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc20_10.2: <bound method> = bound_method %p.ref, %specific_fn
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.call: init %ptr.fba = call %bound_method.loc20_10.2(%p.ref)
// CHECK:STDOUT: return %ptr.as.Copy.impl.Op.call
// CHECK:STDOUT: }
// CHECK:STDOUT:
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