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carbon-lang/toolchain/check/testdata/interop/cpp/class/import/template.carbon
T
Geoff RomerandRichard Smith e023f75254 Implement thunking in terms of constant evaluation (#7332) 
The bulk of this change is changing most pattern insts to be `Always`
rather than `AlwaysUnique` constants, so that they can be wrapped in
`SpecificConstant`s to perform substitution. That then lets thunking
rely much more on `SpecificConstant` wrappers instead of deep-copying
the inst tree with modified types.

This approach to thunking should scale better, particularly as things
like form generics make function signatures more complex, because we can
leverage the existing support for constant evaluation and substitution.
Unfortunately, applying this approach to binding patterns will require
more work; see the TODO near the top of `thunk.cpp` for details.

---------

Co-authored-by: Richard Smith <richard@metafoo.co.uk>
2026-06-13 00:22:00 +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/int.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/class/import/template.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/class/import/template.carbon
// --- class_template.h
struct Base {};
template<typename T> struct A : Base {
void f() const;
T n;
};
using Aint = A<int>;
using Along = A<long>;
// --- use_class_template.carbon
library "[[@TEST_NAME]]";
import Cpp library "class_template.h";
fn F(x: Cpp.Aint) -> i32 {
// Trigger instantiation through name lookup.
//@dump-sem-ir-begin
x.f();
return x.n;
//@dump-sem-ir-end
}
fn G(p: Cpp.Along*) -> Cpp.Base* {
// Trigger instantiation through type completion.
//@dump-sem-ir-begin
return p;
//@dump-sem-ir-end
}
// --- instantiation_error.h
template<typename T> struct X {
using type = typename T::member;
};
struct Y {
using member = int;
};
using XY = X<Y>;
using Xint = X<int>;
// --- fail_use_instantiation_error.carbon
library "[[@TEST_NAME]]";
import Cpp library "instantiation_error.h";
//@dump-sem-ir-begin
var x: Cpp.XY.r#type = 0;
// CHECK:STDERR: fail_use_instantiation_error.carbon:[[@LINE+12]]:8: error: member access into incomplete class `Cpp.X` [QualifiedExprInIncompleteClassScope]
// CHECK:STDERR: var y: Cpp.Xint.r#type = 0;
// CHECK:STDERR: ^~~~~~~~~~~~~~~
// CHECK:STDERR: fail_use_instantiation_error.carbon:[[@LINE-8]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./instantiation_error.h:3:25: note: type 'int' cannot be used prior to '::' because it has no members [CppInteropParseError]
// CHECK:STDERR: 3 | using type = typename T::member;
// CHECK:STDERR: | ^
// CHECK:STDERR: fail_use_instantiation_error.carbon:[[@LINE-12]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./instantiation_error.h:2:29: note: in instantiation of template class 'X<int>' requested here [CppInteropParseNote]
// CHECK:STDERR: 2 | template<typename T> struct X {
// CHECK:STDERR: | ^
// CHECK:STDERR:
var y: Cpp.Xint.r#type = 0;
//@dump-sem-ir-end
// --- use_indirect_class_template.carbon
library "[[@TEST_NAME]]";
import Cpp;
inline Cpp '''
template<typename T> struct wrap_iter {};
template<typename T> struct vector {
using iterator = wrap_iter<T*>;
iterator begin();
};
''';
fn F() {
var v: Cpp.vector(i32);
v.begin();
}
// CHECK:STDOUT: --- use_class_template.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %A.614: type = class_type @A.1 [concrete]
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %N: Core.IntLiteral = symbolic_binding N, 0 [symbolic]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT: %Base: type = class_type @Base [concrete]
// CHECK:STDOUT: %A.elem.708: type = unbound_element_type %A.614, %i32 [concrete]
// CHECK:STDOUT: %A.f.cpp_overload_set.type: type = cpp_overload_set_type @A.f.cpp_overload_set [concrete]
// CHECK:STDOUT: %A.f.cpp_overload_set.value: %A.f.cpp_overload_set.type = cpp_overload_set_value @A.f.cpp_overload_set [concrete]
// CHECK:STDOUT: %f__carbon_thunk.type: type = fn_type @f__carbon_thunk [concrete]
// CHECK:STDOUT: %f__carbon_thunk: %f__carbon_thunk.type = struct_value () [concrete]
// CHECK:STDOUT: %Copy.type: type = facet_type <@Copy> [concrete]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.type.ac8: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%N) [symbolic]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.5e0: %Int.as.Copy.impl.Op.type.ac8 = 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.0e0: <witness> = impl_witness imports.%Copy.impl_witness_table.367, @Int.as.Copy.impl(%int_32) [concrete]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.type.3f6: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%int_32) [concrete]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.4f6: %Int.as.Copy.impl.Op.type.3f6 = struct_value () [concrete]
// CHECK:STDOUT: %Copy.facet.987: %Copy.type = facet_value %i32, (%Copy.impl_witness.0e0) [concrete]
// CHECK:STDOUT: %Copy.WithSelf.Op.type.d09: type = fn_type @Copy.WithSelf.Op, @Copy.WithSelf(%Copy.facet.987) [concrete]
// CHECK:STDOUT: %.7a6: type = fn_type_with_self_type %Copy.WithSelf.Op.type.d09, %Copy.facet.987 [concrete]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %Int.as.Copy.impl.Op.4f6, @Int.as.Copy.impl.Op(%int_32) [concrete]
// CHECK:STDOUT: %A.26b: type = class_type @A.2 [concrete]
// CHECK:STDOUT: %ptr.f2d: type = ptr_type %A.26b [concrete]
// CHECK:STDOUT: %ptr.0e0: type = ptr_type %Base [concrete]
// CHECK:STDOUT: %Copy.impl_witness.428: <witness> = impl_witness imports.%Copy.impl_witness_table.4f1, @ptr.as.Copy.impl(%Base) [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.type.136: type = fn_type @ptr.as.Copy.impl.Op, @ptr.as.Copy.impl(%Base) [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.377: %ptr.as.Copy.impl.Op.type.136 = struct_value () [concrete]
// CHECK:STDOUT: %Copy.facet.abc: %Copy.type = facet_value %ptr.0e0, (%Copy.impl_witness.428) [concrete]
// CHECK:STDOUT: %Copy.WithSelf.Op.type.be3: type = fn_type @Copy.WithSelf.Op, @Copy.WithSelf(%Copy.facet.abc) [concrete]
// CHECK:STDOUT: %.6e4: type = fn_type_with_self_type %Copy.WithSelf.Op.type.be3, %Copy.facet.abc [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %ptr.as.Copy.impl.Op.377, @ptr.as.Copy.impl.Op(%Base) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %A.f.cpp_overload_set.value: %A.f.cpp_overload_set.type = cpp_overload_set_value @A.f.cpp_overload_set [concrete = constants.%A.f.cpp_overload_set.value]
// CHECK:STDOUT: %f__carbon_thunk.decl: %f__carbon_thunk.type = fn_decl @f__carbon_thunk [concrete = constants.%f__carbon_thunk] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import_ref.cd6: @Int.as.Copy.impl.%Int.as.Copy.impl.Op.type (%Int.as.Copy.impl.Op.type.ac8) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Int.as.Copy.impl.%Int.as.Copy.impl.Op (constants.%Int.as.Copy.impl.Op.5e0)]
// CHECK:STDOUT: %Copy.impl_witness_table.367 = impl_witness_table (%Core.import_ref.cd6), @Int.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: fn @F(%x.param: %A.614) -> out %return.param: %i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %x.ref.loc9: %A.614 = name_ref x, %x
// CHECK:STDOUT: %f.ref: %A.f.cpp_overload_set.type = name_ref f, imports.%A.f.cpp_overload_set.value [concrete = constants.%A.f.cpp_overload_set.value]
// CHECK:STDOUT: %bound_method.loc9: <bound method> = bound_method %x.ref.loc9, %f.ref
// CHECK:STDOUT: %f__carbon_thunk.call: init %empty_tuple.type = call imports.%f__carbon_thunk.decl(%x.ref.loc9)
// CHECK:STDOUT: %x.ref.loc10: %A.614 = name_ref x, %x
// CHECK:STDOUT: %n.ref: %A.elem.708 = name_ref n, @A.1.%.2 [concrete = @A.1.%.2]
// CHECK:STDOUT: %.loc10_11.1: ref %i32 = class_element_access %x.ref.loc10, element1
// CHECK:STDOUT: %.loc10_11.2: %i32 = acquire_value %.loc10_11.1
// CHECK:STDOUT: %impl.elem0: %.7a6 = impl_witness_access constants.%Copy.impl_witness.0e0, element0 [concrete = constants.%Int.as.Copy.impl.Op.4f6]
// CHECK:STDOUT: %bound_method.loc10_11.1: <bound method> = bound_method %.loc10_11.2, %impl.elem0
// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @Int.as.Copy.impl.Op(constants.%int_32) [concrete = constants.%Int.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc10_11.2: <bound method> = bound_method %.loc10_11.2, %specific_fn
// CHECK:STDOUT: %Int.as.Copy.impl.Op.call: init %i32 = call %bound_method.loc10_11.2(%.loc10_11.2)
// CHECK:STDOUT: return %Int.as.Copy.impl.Op.call
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @G(%p.param: %ptr.f2d) -> out %return.param: %ptr.0e0 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %p.ref: %ptr.f2d = name_ref p, %p
// CHECK:STDOUT: %.loc17_11.1: ref %A.26b = deref %p.ref
// CHECK:STDOUT: %.loc17_11.2: ref %Base = class_element_access %.loc17_11.1, element0
// CHECK:STDOUT: %addr: %ptr.0e0 = addr_of %.loc17_11.2
// CHECK:STDOUT: %.loc17_11.3: %ptr.0e0 = converted %p.ref, %addr
// CHECK:STDOUT: %impl.elem0: %.6e4 = impl_witness_access constants.%Copy.impl_witness.428, element0 [concrete = constants.%ptr.as.Copy.impl.Op.377]
// CHECK:STDOUT: %bound_method.loc17_11.1: <bound method> = bound_method %.loc17_11.3, %impl.elem0
// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @ptr.as.Copy.impl.Op(constants.%Base) [concrete = constants.%ptr.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc17_11.2: <bound method> = bound_method %.loc17_11.3, %specific_fn
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.call: init %ptr.0e0 = call %bound_method.loc17_11.2(%.loc17_11.3)
// CHECK:STDOUT: return %ptr.as.Copy.impl.Op.call
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_use_instantiation_error.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %X.816: type = class_type @X.1 [concrete]
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT: %pattern_type.6b6: type = pattern_type %i32 [concrete]
// CHECK:STDOUT: %x.patt: %pattern_type.6b6 = ref_binding_pattern x [concrete]
// CHECK:STDOUT: %x.var_patt: %pattern_type.6b6 = var_pattern %x.patt [concrete]
// CHECK:STDOUT: %int_0.5c6: Core.IntLiteral = int_value 0 [concrete]
// CHECK:STDOUT: %ImplicitAs.type.914: type = facet_type <@ImplicitAs, @ImplicitAs(%i32)> [concrete]
// CHECK:STDOUT: %To: Core.IntLiteral = symbolic_binding To, 0 [symbolic]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.e74: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl(%To) [symbolic]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.845: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.e74 = struct_value () [symbolic]
// CHECK:STDOUT: %ImplicitAs.impl_witness.a23: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.b3c, @Core.IntLiteral.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.2ba: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.e39: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.2ba = struct_value () [concrete]
// CHECK:STDOUT: %ImplicitAs.facet: %ImplicitAs.type.914 = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.a23) [concrete]
// CHECK:STDOUT: %ImplicitAs.WithSelf.Convert.type.740: type = fn_type @ImplicitAs.WithSelf.Convert, @ImplicitAs.WithSelf(%i32, %ImplicitAs.facet) [concrete]
// CHECK:STDOUT: %.1c5: type = fn_type_with_self_type %ImplicitAs.WithSelf.Convert.type.740, %ImplicitAs.facet [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound: <bound method> = bound_method %int_0.5c6, %Core.IntLiteral.as.ImplicitAs.impl.Convert.e39 [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn: <specific function> = specific_function %Core.IntLiteral.as.ImplicitAs.impl.Convert.e39, @Core.IntLiteral.as.ImplicitAs.impl.Convert(%int_32) [concrete]
// CHECK:STDOUT: %bound_method: <bound method> = bound_method %int_0.5c6, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT: %int_0.3c0: %i32 = int_value 0 [concrete]
// CHECK:STDOUT: %X.c92: type = class_type @X.2 [concrete]
// CHECK:STDOUT: %y.patt: %pattern_type.6b6 = ref_binding_pattern y [concrete]
// CHECK:STDOUT: %y.var_patt: %pattern_type.6b6 = var_pattern %y.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT: .XY = %X.decl.8c4
// CHECK:STDOUT: .Xint = %X.decl.b67
// CHECK:STDOUT: import Cpp//...
// CHECK:STDOUT: }
// CHECK:STDOUT: %X.decl.8c4: type = class_decl @X.1 [concrete = constants.%X.816] {} {}
// CHECK:STDOUT: %Core.import_ref.edf: @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert.type (%Core.IntLiteral.as.ImplicitAs.impl.Convert.type.e74) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert (constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.845)]
// CHECK:STDOUT: %ImplicitAs.impl_witness_table.b3c = impl_witness_table (%Core.import_ref.edf), @Core.IntLiteral.as.ImplicitAs.impl [concrete]
// CHECK:STDOUT: %X.decl.b67: type = class_decl @X.2 [concrete = constants.%X.c92] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %x.patt: %pattern_type.6b6 = ref_binding_pattern x [concrete = constants.%x.patt]
// CHECK:STDOUT: %x.var_patt: %pattern_type.6b6 = var_pattern %x.patt [concrete = constants.%x.var_patt]
// CHECK:STDOUT: }
// CHECK:STDOUT: %x.var: ref %i32 = var %x.var_patt [concrete]
// CHECK:STDOUT: %.loc7: type = splice_block %type.ref.loc7 [concrete = constants.%i32] {
// CHECK:STDOUT: %Cpp.ref.loc7: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %XY.ref: type = name_ref XY, imports.%X.decl.8c4 [concrete = constants.%X.816]
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %type.ref.loc7: type = name_ref r#type, %i32.4 [concrete = constants.%i32]
// CHECK:STDOUT: }
// CHECK:STDOUT: %x: ref %i32 = ref_binding x, %x.var [concrete = %x.var]
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %y.patt: %pattern_type.6b6 = ref_binding_pattern y [concrete = constants.%y.patt]
// CHECK:STDOUT: %y.var_patt: %pattern_type.6b6 = var_pattern %y.patt [concrete = constants.%y.var_patt]
// CHECK:STDOUT: }
// CHECK:STDOUT: %y.var: ref %i32 = var %y.var_patt [concrete]
// CHECK:STDOUT: %.loc21: type = splice_block %type.ref.loc21 [concrete = constants.%i32] {
// CHECK:STDOUT: %Cpp.ref.loc21: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %Xint.ref: type = name_ref Xint, imports.%X.decl.b67 [concrete = constants.%X.c92]
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %type.ref.loc21: type = name_ref r#type, %i32.2 [concrete = constants.%i32]
// CHECK:STDOUT: }
// CHECK:STDOUT: %y: ref %i32 = ref_binding y, %y.var [concrete = %y.var]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %int_0.loc7: Core.IntLiteral = int_value 0 [concrete = constants.%int_0.5c6]
// CHECK:STDOUT: %impl.elem0.loc7: %.1c5 = impl_witness_access constants.%ImplicitAs.impl_witness.a23, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.e39]
// CHECK:STDOUT: %bound_method.loc7_1.1: <bound method> = bound_method %int_0.loc7, %impl.elem0.loc7 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound]
// CHECK:STDOUT: %specific_fn.loc7: <specific function> = specific_function %impl.elem0.loc7, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc7_1.2: <bound method> = bound_method %int_0.loc7, %specific_fn.loc7 [concrete = constants.%bound_method]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc7: init %i32 = call %bound_method.loc7_1.2(%int_0.loc7) [concrete = constants.%int_0.3c0]
// CHECK:STDOUT: %.loc7: init %i32 = converted %int_0.loc7, %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc7 [concrete = constants.%int_0.3c0]
// CHECK:STDOUT: assign file.%x.var, %.loc7
// CHECK:STDOUT: %int_0.loc21: Core.IntLiteral = int_value 0 [concrete = constants.%int_0.5c6]
// CHECK:STDOUT: %impl.elem0.loc21: %.1c5 = impl_witness_access constants.%ImplicitAs.impl_witness.a23, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.e39]
// CHECK:STDOUT: %bound_method.loc21_1.1: <bound method> = bound_method %int_0.loc21, %impl.elem0.loc21 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound]
// CHECK:STDOUT: %specific_fn.loc21: <specific function> = specific_function %impl.elem0.loc21, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc21_1.2: <bound method> = bound_method %int_0.loc21, %specific_fn.loc21 [concrete = constants.%bound_method]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc21: init %i32 = call %bound_method.loc21_1.2(%int_0.loc21) [concrete = constants.%int_0.3c0]
// CHECK:STDOUT: %.loc21: init %i32 = converted %int_0.loc21, %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc21 [concrete = constants.%int_0.3c0]
// CHECK:STDOUT: assign file.%y.var, %.loc21
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
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