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7871237c1503a7668483a1dd9d2b82f2c598063f
carbon-lang/toolchain/check/testdata/const/basics.carbon
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Chandler Carruthandjosh11b 7871237c15 Move self to the explicit () parameter list (proposal #7016) (#7272) 
Implements proposal #7016: `self` moves from the deduced implicit list
(`fn F[self: Self]()`) to the front of the explicit list. Its type may
be written explicitly (`fn F(self: Self)`) or omitted, in which case it
defaults to `Self` (`fn F(self)`, `fn F(ref self)`); `self` in the
implicit list is rejected.

Throughout checking, `self` is modeled as the first explicit parameter.
Because a method is just a function whose first parameter is `self`, it
can also be called as an ordinary function with the receiver passed
explicitly (`Type.M(obj, ...)`), not only as `obj.M(...)`. A new
`SemIR::CallArgParamPatterns` helper chooses the parameters matched
against the explicit arguments, excluding a leading `self` only when it
is supplied as a method-call receiver; arity checking, conversion, and
generic deduction use it. The resulting SemIR and lowering are
unchanged: `self` is still `call_param0`, and witnesses, thunks, and
vtables are unaffected.

An omitted `self` type is parsed as a `SelfBindingPattern` node with no
type expression; checking synthesizes the `Self` type so it behaves
exactly like `self: Self`. However, the exact spelling used must match
between a forward declaration and a definition, following #3763's rules
around declaration matching.

Generated functions, thunks, and C++ interop import/export build `self`
as the first explicit parameter, and the `self`-type override (e.g.
Derived->Base for a virtual override) applies to the explicit `self`.
Placement is validated by new diagnostics: `SelfInImplicitParamList`,
`SelfNotFirstParam`, and `SelfOutsideParamList`. The benchmark source
generator and the documentation adopt the `(self)` shorthand; the
prelude, the examples, and the test data are migrated in the following
commits.

Assisted-by: Claude Code with Claude Opus 4.7

---------

Co-authored-by: josh11b <15258583+josh11b@users.noreply.github.com>
2026-06-10 15:30:43 +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/const/basics.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/const/basics.carbon
// --- basic.carbon
library "[[@TEST_NAME]]";
class C;
//@dump-sem-ir-begin
fn A(p: const C**) -> const C** {
return p;
}
fn B(p: const (C*)) -> const (C*) {
return p;
}
//@dump-sem-ir-end
// --- collapse.carbon
library "[[@TEST_NAME]]";
class C;
// OK, `const (const C)` is the same type as `const C`.
//@dump-sem-ir-begin
// CHECK:STDERR: collapse.carbon:[[@LINE+4]]:23: warning: `const` applied repeatedly to the same type has no additional effect [RepeatedConst]
// CHECK:STDERR: fn F(p: const C**) -> const (const C)** {
// CHECK:STDERR: ^~~~~~~~~~~~~~~
// CHECK:STDERR:
fn F(p: const C**) -> const (const C)** {
return p;
}
//@dump-sem-ir-end
// --- fail_collapse_in_error.carbon
library "[[@TEST_NAME]]";
class C;
// CHECK:STDERR: fail_collapse_in_error.carbon:[[@LINE+4]]:9: warning: `const` applied repeatedly to the same type has no additional effect [RepeatedConst]
// CHECK:STDERR: fn G(p: const (const C)**) -> C** {
// CHECK:STDERR: ^~~~~~~~~~~~~~~
// CHECK:STDERR:
fn G(p: const (const C)**) -> C** {
// CHECK:STDERR: fail_collapse_in_error.carbon:[[@LINE+7]]:3: error: cannot implicitly convert expression of type `const C**` to `C**` [ConversionFailure]
// CHECK:STDERR: return p;
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR: fail_collapse_in_error.carbon:[[@LINE+4]]:3: note: type `const C**` does not implement interface `Core.ImplicitAs(C**)` [MissingImplInMemberAccessInContext]
// CHECK:STDERR: return p;
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR:
return p;
}
// --- add_or_remove_while_forming_value.carbon
library "[[@TEST_NAME]]";
class X {}
fn TakeValue(unused x: X) {}
fn TakeConstValue(unused x: const X) {}
fn PassConstValueToValue(a: const X) {
TakeValue(a);
}
fn PassValueToConstValue(a: X) {
TakeConstValue(a);
}
fn PassConstReferenceToValue(p: const X*) {
TakeValue(*p);
}
fn PassReferenceToConstValue(p: X*) {
TakeConstValue(*p);
}
// --- add_or_remove_while_initializing.carbon
library "[[@TEST_NAME]]";
class X {}
var init_non_const_from_non_const: X = {} as X;
var init_non_const_from_const: X = ({} as X) as const X;
var init_const_from_non_const: const X = {} as X;
var init_const_from_const: const X = ({} as X) as const X;
// --- add_while_forming_reference.carbon
library "[[@TEST_NAME]]";
class X {
fn TakeConstSelf(ref self: const Self);
}
fn PassReferenceToConstReference(p: X*) {
p->TakeConstSelf();
}
// --- fail_remove_while_forming_reference.carbon
library "[[@TEST_NAME]]";
class X {
fn TakeSelf(ref self);
}
fn PassConstReferenceToReference(p: const X*) {
// CHECK:STDERR: fail_remove_while_forming_reference.carbon:[[@LINE+10]]:3: error: cannot implicitly convert expression of type `const X` to `X` [ConversionFailure]
// CHECK:STDERR: p->(X.TakeSelf)();
// CHECK:STDERR: ^~~~~~~~~~~~~~~
// CHECK:STDERR: fail_remove_while_forming_reference.carbon:[[@LINE+7]]:3: note: type `const X` does not implement interface `Core.ImplicitAs(X)` [MissingImplInMemberAccessInContext]
// CHECK:STDERR: p->(X.TakeSelf)();
// CHECK:STDERR: ^~~~~~~~~~~~~~~
// CHECK:STDERR: fail_remove_while_forming_reference.carbon:[[@LINE-10]]:15: note: initializing function parameter [InCallToFunctionParam]
// CHECK:STDERR: fn TakeSelf(ref self);
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR:
p->(X.TakeSelf)();
}
// CHECK:STDOUT: --- basic.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %const.13f: type = const_type %C [concrete]
// CHECK:STDOUT: %ptr.77f: type = ptr_type %const.13f [concrete]
// CHECK:STDOUT: %ptr.0c8: type = ptr_type %ptr.77f [concrete]
// CHECK:STDOUT: %pattern_type.803: type = pattern_type %ptr.0c8 [concrete]
// CHECK:STDOUT: %.5f5: Core.Form = init_form %ptr.0c8 [concrete]
// CHECK:STDOUT: %A.type: type = fn_type @A [concrete]
// CHECK:STDOUT: %A: %A.type = struct_value () [concrete]
// CHECK:STDOUT: %Copy.type: type = facet_type <@Copy> [concrete]
// CHECK:STDOUT: %T.f84: %Copy.type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %const.as.Copy.impl.Op.type.145: type = fn_type @const.as.Copy.impl.Op, @const.as.Copy.impl(%T.f84) [symbolic]
// CHECK:STDOUT: %const.as.Copy.impl.Op.093: %const.as.Copy.impl.Op.type.145 = struct_value () [symbolic]
// CHECK:STDOUT: %T.67d: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.type.ff5: type = fn_type @ptr.as.Copy.impl.Op, @ptr.as.Copy.impl(%T.67d) [symbolic]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.ce9: %ptr.as.Copy.impl.Op.type.ff5 = struct_value () [symbolic]
// CHECK:STDOUT: %Copy.impl_witness.e58: <witness> = impl_witness imports.%Copy.impl_witness_table.4f1, @ptr.as.Copy.impl(%ptr.77f) [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.type.7d8: type = fn_type @ptr.as.Copy.impl.Op, @ptr.as.Copy.impl(%ptr.77f) [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.2de: %ptr.as.Copy.impl.Op.type.7d8 = struct_value () [concrete]
// CHECK:STDOUT: %Copy.facet.6e5: %Copy.type = facet_value %ptr.0c8, (%Copy.impl_witness.e58) [concrete]
// CHECK:STDOUT: %Copy.WithSelf.Op.type.795: type = fn_type @Copy.WithSelf.Op, @Copy.WithSelf(%Copy.facet.6e5) [concrete]
// CHECK:STDOUT: %.709: type = fn_type_with_self_type %Copy.WithSelf.Op.type.795, %Copy.facet.6e5 [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.specific_fn.f37: <specific function> = specific_function %ptr.as.Copy.impl.Op.2de, @ptr.as.Copy.impl.Op(%ptr.77f) [concrete]
// CHECK:STDOUT: %ptr.6b6: type = ptr_type %C [concrete]
// CHECK:STDOUT: %const.0f8: type = const_type %ptr.6b6 [concrete]
// CHECK:STDOUT: %pattern_type.76c: type = pattern_type %const.0f8 [concrete]
// CHECK:STDOUT: %.fdf: Core.Form = init_form %const.0f8 [concrete]
// CHECK:STDOUT: %B.type: type = fn_type @B [concrete]
// CHECK:STDOUT: %B: %B.type = struct_value () [concrete]
// CHECK:STDOUT: %Copy.impl_witness.65f: <witness> = impl_witness imports.%Copy.impl_witness_table.4f1, @ptr.as.Copy.impl(%C) [concrete]
// CHECK:STDOUT: %Copy.facet.3f0: %Copy.type = facet_value %ptr.6b6, (%Copy.impl_witness.65f) [concrete]
// CHECK:STDOUT: %Copy.impl_witness.8b4: <witness> = impl_witness imports.%Copy.impl_witness_table.554, @const.as.Copy.impl(%Copy.facet.3f0) [concrete]
// CHECK:STDOUT: %const.as.Copy.impl.Op.type.0ae: type = fn_type @const.as.Copy.impl.Op, @const.as.Copy.impl(%Copy.facet.3f0) [concrete]
// CHECK:STDOUT: %const.as.Copy.impl.Op.714: %const.as.Copy.impl.Op.type.0ae = struct_value () [concrete]
// CHECK:STDOUT: %Copy.facet.471: %Copy.type = facet_value %const.0f8, (%Copy.impl_witness.8b4) [concrete]
// CHECK:STDOUT: %Copy.WithSelf.Op.type.be3: type = fn_type @Copy.WithSelf.Op, @Copy.WithSelf(%Copy.facet.471) [concrete]
// CHECK:STDOUT: %.8c4: type = fn_type_with_self_type %Copy.WithSelf.Op.type.be3, %Copy.facet.471 [concrete]
// CHECK:STDOUT: %const.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %const.as.Copy.impl.Op.714, @const.as.Copy.impl.Op(%Copy.facet.3f0) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core.import_ref.f89: @const.as.Copy.impl.%const.as.Copy.impl.Op.type (%const.as.Copy.impl.Op.type.145) = import_ref Core//prelude/parts/copy, loc{{\d+_\d+}}, loaded [symbolic = @const.as.Copy.impl.%const.as.Copy.impl.Op (constants.%const.as.Copy.impl.Op.093)]
// CHECK:STDOUT: %Copy.impl_witness_table.554 = impl_witness_table (%Core.import_ref.f89), @const.as.Copy.impl [concrete]
// CHECK:STDOUT: %Core.import_ref.e5f: @ptr.as.Copy.impl.%ptr.as.Copy.impl.Op.type (%ptr.as.Copy.impl.Op.type.ff5) = 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.ce9)]
// CHECK:STDOUT: %Copy.impl_witness_table.4f1 = impl_witness_table (%Core.import_ref.e5f), @ptr.as.Copy.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %A.decl: %A.type = fn_decl @A [concrete = constants.%A] {
// CHECK:STDOUT: %p.param_patt: %pattern_type.803 = value_param_pattern [concrete]
// CHECK:STDOUT: %p.patt: %pattern_type.803 = at_binding_pattern p, %p.param_patt [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.803 = out_param_pattern [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.803 = return_slot_pattern %return.param_patt, %ptr.loc6_31 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %C.ref.loc6_29: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %const.loc6_23: type = const_type %C.ref.loc6_29 [concrete = constants.%const.13f]
// CHECK:STDOUT: %ptr.loc6_30: type = ptr_type %const.loc6_23 [concrete = constants.%ptr.77f]
// CHECK:STDOUT: %ptr.loc6_31: type = ptr_type %ptr.loc6_30 [concrete = constants.%ptr.0c8]
// CHECK:STDOUT: %.loc6_31: Core.Form = init_form %ptr.loc6_31 [concrete = constants.%.5f5]
// CHECK:STDOUT: %p.param: %ptr.0c8 = value_param call_param0
// CHECK:STDOUT: %.loc6_17: type = splice_block %ptr.loc6_17 [concrete = constants.%ptr.0c8] {
// CHECK:STDOUT: %C.ref.loc6_15: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %const.loc6_9: type = const_type %C.ref.loc6_15 [concrete = constants.%const.13f]
// CHECK:STDOUT: %ptr.loc6_16: type = ptr_type %const.loc6_9 [concrete = constants.%ptr.77f]
// CHECK:STDOUT: %ptr.loc6_17: type = ptr_type %ptr.loc6_16 [concrete = constants.%ptr.0c8]
// CHECK:STDOUT: }
// CHECK:STDOUT: %p: %ptr.0c8 = value_binding p, %p.param
// CHECK:STDOUT: %return.param: ref %ptr.0c8 = out_param call_param1
// CHECK:STDOUT: %return: ref %ptr.0c8 = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %B.decl: %B.type = fn_decl @B [concrete = constants.%B] {
// CHECK:STDOUT: %p.param_patt: %pattern_type.76c = value_param_pattern [concrete]
// CHECK:STDOUT: %p.patt: %pattern_type.76c = at_binding_pattern p, %p.param_patt [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.76c = out_param_pattern [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.76c = return_slot_pattern %return.param_patt, %const.loc10_24 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %C.ref.loc10_31: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %ptr.loc10_32: type = ptr_type %C.ref.loc10_31 [concrete = constants.%ptr.6b6]
// CHECK:STDOUT: %const.loc10_24: type = const_type %ptr.loc10_32 [concrete = constants.%const.0f8]
// CHECK:STDOUT: %.loc10_24: Core.Form = init_form %const.loc10_24 [concrete = constants.%.fdf]
// CHECK:STDOUT: %p.param: %const.0f8 = value_param call_param0
// CHECK:STDOUT: %.loc10_9: type = splice_block %const.loc10_9 [concrete = constants.%const.0f8] {
// CHECK:STDOUT: %C.ref.loc10_16: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %ptr.loc10_17: type = ptr_type %C.ref.loc10_16 [concrete = constants.%ptr.6b6]
// CHECK:STDOUT: %const.loc10_9: type = const_type %ptr.loc10_17 [concrete = constants.%const.0f8]
// CHECK:STDOUT: }
// CHECK:STDOUT: %p: %const.0f8 = value_binding p, %p.param
// CHECK:STDOUT: %return.param: ref %const.0f8 = out_param call_param1
// CHECK:STDOUT: %return: ref %const.0f8 = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @A(%p.param: %ptr.0c8) -> out %return.param: %ptr.0c8 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %p.ref: %ptr.0c8 = name_ref p, %p
// CHECK:STDOUT: %impl.elem0: %.709 = impl_witness_access constants.%Copy.impl_witness.e58, element0 [concrete = constants.%ptr.as.Copy.impl.Op.2de]
// CHECK:STDOUT: %bound_method.loc7_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.%ptr.77f) [concrete = constants.%ptr.as.Copy.impl.Op.specific_fn.f37]
// CHECK:STDOUT: %bound_method.loc7_10.2: <bound method> = bound_method %p.ref, %specific_fn
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.call: init %ptr.0c8 = call %bound_method.loc7_10.2(%p.ref)
// CHECK:STDOUT: return %ptr.as.Copy.impl.Op.call
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @B(%p.param: %const.0f8) -> out %return.param: %const.0f8 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %p.ref: %const.0f8 = name_ref p, %p
// CHECK:STDOUT: %impl.elem0: %.8c4 = impl_witness_access constants.%Copy.impl_witness.8b4, element0 [concrete = constants.%const.as.Copy.impl.Op.714]
// CHECK:STDOUT: %bound_method.loc11_10.1: <bound method> = bound_method %p.ref, %impl.elem0
// CHECK:STDOUT: %Copy.facet: %Copy.type = facet_value constants.%ptr.6b6, (constants.%Copy.impl_witness.65f) [concrete = constants.%Copy.facet.3f0]
// CHECK:STDOUT: %.loc11: %Copy.type = converted constants.%ptr.6b6, %Copy.facet [concrete = constants.%Copy.facet.3f0]
// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @const.as.Copy.impl.Op(constants.%Copy.facet.3f0) [concrete = constants.%const.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc11_10.2: <bound method> = bound_method %p.ref, %specific_fn
// CHECK:STDOUT: %const.as.Copy.impl.Op.call: init %const.0f8 = call %bound_method.loc11_10.2(%p.ref)
// CHECK:STDOUT: return %const.as.Copy.impl.Op.call
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- collapse.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %const.13f: type = const_type %C [concrete]
// CHECK:STDOUT: %ptr.77f: type = ptr_type %const.13f [concrete]
// CHECK:STDOUT: %ptr.0c8: type = ptr_type %ptr.77f [concrete]
// CHECK:STDOUT: %pattern_type.803: type = pattern_type %ptr.0c8 [concrete]
// CHECK:STDOUT: %.5f5: Core.Form = init_form %ptr.0c8 [concrete]
// CHECK:STDOUT: %F.type: type = fn_type @F [concrete]
// CHECK:STDOUT: %F: %F.type = struct_value () [concrete]
// CHECK:STDOUT: %Copy.type: type = facet_type <@Copy> [concrete]
// CHECK:STDOUT: %T.67d: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.type.ff5: type = fn_type @ptr.as.Copy.impl.Op, @ptr.as.Copy.impl(%T.67d) [symbolic]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.ce9: %ptr.as.Copy.impl.Op.type.ff5 = struct_value () [symbolic]
// CHECK:STDOUT: %Copy.impl_witness.e58: <witness> = impl_witness imports.%Copy.impl_witness_table.4f1, @ptr.as.Copy.impl(%ptr.77f) [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.type.7d8: type = fn_type @ptr.as.Copy.impl.Op, @ptr.as.Copy.impl(%ptr.77f) [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.2de: %ptr.as.Copy.impl.Op.type.7d8 = struct_value () [concrete]
// CHECK:STDOUT: %Copy.facet: %Copy.type = facet_value %ptr.0c8, (%Copy.impl_witness.e58) [concrete]
// CHECK:STDOUT: %Copy.WithSelf.Op.type.795: type = fn_type @Copy.WithSelf.Op, @Copy.WithSelf(%Copy.facet) [concrete]
// CHECK:STDOUT: %.709: type = fn_type_with_self_type %Copy.WithSelf.Op.type.795, %Copy.facet [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %ptr.as.Copy.impl.Op.2de, @ptr.as.Copy.impl.Op(%ptr.77f) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core.import_ref.e5f: @ptr.as.Copy.impl.%ptr.as.Copy.impl.Op.type (%ptr.as.Copy.impl.Op.type.ff5) = 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.ce9)]
// CHECK:STDOUT: %Copy.impl_witness_table.4f1 = impl_witness_table (%Core.import_ref.e5f), @ptr.as.Copy.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {
// CHECK:STDOUT: %p.param_patt: %pattern_type.803 = value_param_pattern [concrete]
// CHECK:STDOUT: %p.patt: %pattern_type.803 = at_binding_pattern p, %p.param_patt [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.803 = out_param_pattern [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.803 = return_slot_pattern %return.param_patt, %ptr.loc11_39 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %C.ref.loc11_36: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %const.loc11_30: type = const_type %C.ref.loc11_36 [concrete = constants.%const.13f]
// CHECK:STDOUT: %const.loc11_23: type = const_type %const.loc11_30 [concrete = constants.%const.13f]
// CHECK:STDOUT: %ptr.loc11_38: type = ptr_type %const.loc11_23 [concrete = constants.%ptr.77f]
// CHECK:STDOUT: %ptr.loc11_39: type = ptr_type %ptr.loc11_38 [concrete = constants.%ptr.0c8]
// CHECK:STDOUT: %.loc11_39: Core.Form = init_form %ptr.loc11_39 [concrete = constants.%.5f5]
// CHECK:STDOUT: %p.param: %ptr.0c8 = value_param call_param0
// CHECK:STDOUT: %.loc11_17: type = splice_block %ptr.loc11_17 [concrete = constants.%ptr.0c8] {
// CHECK:STDOUT: %C.ref.loc11_15: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %const.loc11_9: type = const_type %C.ref.loc11_15 [concrete = constants.%const.13f]
// CHECK:STDOUT: %ptr.loc11_16: type = ptr_type %const.loc11_9 [concrete = constants.%ptr.77f]
// CHECK:STDOUT: %ptr.loc11_17: type = ptr_type %ptr.loc11_16 [concrete = constants.%ptr.0c8]
// CHECK:STDOUT: }
// CHECK:STDOUT: %p: %ptr.0c8 = value_binding p, %p.param
// CHECK:STDOUT: %return.param: ref %ptr.0c8 = out_param call_param1
// CHECK:STDOUT: %return: ref %ptr.0c8 = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%p.param: %ptr.0c8) -> out %return.param: %ptr.0c8 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %p.ref: %ptr.0c8 = name_ref p, %p
// CHECK:STDOUT: %impl.elem0: %.709 = impl_witness_access constants.%Copy.impl_witness.e58, element0 [concrete = constants.%ptr.as.Copy.impl.Op.2de]
// CHECK:STDOUT: %bound_method.loc12_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.%ptr.77f) [concrete = constants.%ptr.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc12_10.2: <bound method> = bound_method %p.ref, %specific_fn
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.call: init %ptr.0c8 = call %bound_method.loc12_10.2(%p.ref)
// CHECK:STDOUT: return %ptr.as.Copy.impl.Op.call
// CHECK:STDOUT: }
// CHECK:STDOUT:
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