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carbon-lang/toolchain/check/testdata/interop/cpp/function/import/function.carbon
T
Dana Jansens 24766e213e Defer evaluation of witnesses substituted while identifying a facet type (#7930) 
When identifying a facet type, defer evaluation of LookupImplWitnesses
by redirecting them to evaluate into IdentifiedWitness. Then the caller
of identify will need to substitute the IdentifiedWitnesses, either with
witnesses of their own, or with LookupImplWitness to cause a lookup
operation.

This allows:
- An `impl as` on a named constraint can subst the witnesses in
designators from the named constraint with a witness to the impl itself.
This prevents them from looking for and finding some other overlapping
impl. (This PR)
- Impl lookup to collect rewrite/equality requirements from all named
constraints and then use the impls it has already found to evaluate any
designators in those requirements instead of performing impl lookup
again (creating a cycle). (Done in
https://github.com/carbon-language/carbon-lang/pull/7944)
- Similarly, an `impl as` can collect impls and equality requirements
from all named constraints and verify them correctly by replacing
witnesses that should refer to the impl with the correct witness instead
of performing a lookup and finding an overlapping impl. (Done in
https://github.com/carbon-language/carbon-lang/pull/7937)
- ImplWitnessAccess to be able to find rewrites from a named constraint,
not just from the initial DeclaredFacetType. (TBD)

To do this we need to introduce the concept of "identified" specifics.
In order to identify a facet type, we must construct a specific for each
require decl in a named constraint. These specifics will have
IdentifiedWitnesses inside them, but their args would otherwise match a
specific for the require decl constructed in another context. To avoid
polluting the canonical specific namespace, we introduce a second
namespace of specifics that are "identified" since they are created by
identifying.

As we have introduced a new global state that modifies eval behaviour,
we must disable that state when resolving a specific (as per
https://github.com/carbon-language/carbon-lang/pull/7923). But inside an
"identified" specific, we preserve the behaviour so that the witnesses
modified by identify (through SubstPeriodSelf or through evaluating a
require specific) have their evaluation deferred.
2026-10-14 14:12:56 +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/primitives.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/function/import/function.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/function/import/function.carbon
// ============================================================================
// Global
// ============================================================================
// --- global.h
auto global_foo() -> void;
// --- import_global.carbon
library "[[@TEST_NAME]]";
import Cpp library "global.h";
fn MyF() {
//@dump-sem-ir-begin
Cpp.global_foo();
//@dump-sem-ir-end
}
// --- fail_import_global_use_different_name.carbon
library "[[@TEST_NAME]]";
import Cpp library "global.h";
fn MyF() {
// CHECK:STDERR: fail_import_global_use_different_name.carbon:[[@LINE+4]]:3: error: member name `bar` not found in `Cpp` [MemberNameNotFoundInInstScope]
// CHECK:STDERR: Cpp.bar();
// CHECK:STDERR: ^~~~~~~
// CHECK:STDERR:
Cpp.bar();
}
// ============================================================================
// Carbon keyword name
// ============================================================================
// --- special_name.h
auto base() -> void;
// --- fail_import_special_name_call_unescaped.carbon
library "[[@TEST_NAME]]";
import Cpp library "special_name.h";
fn MyF() {
// CHECK:STDERR: fail_import_special_name_call_unescaped.carbon:[[@LINE+4]]:3: error: member name `base` not found in `Cpp` [MemberNameNotFoundInInstScope]
// CHECK:STDERR: Cpp.base();
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR:
Cpp.base();
}
// --- import_special_name_call_escaped.carbon
library "[[@TEST_NAME]]";
import Cpp library "special_name.h";
fn MyF() {
//@dump-sem-ir-begin
Cpp.r#base();
//@dump-sem-ir-end
}
// --- fail_import_special_name_call_escaped_no_match.carbon
library "[[@TEST_NAME]]";
import Cpp library "special_name.h";
fn MyF() {
// CHECK:STDERR: fail_import_special_name_call_escaped_no_match.carbon:[[@LINE+8]]:15: error: no matching function for call to 'base' [CppInteropParseError]
// CHECK:STDERR: 15 | Cpp.r#base(1);
// CHECK:STDERR: | ^
// CHECK:STDERR: fail_import_special_name_call_escaped_no_match.carbon:[[@LINE-6]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./special_name.h:2:6: note: candidate function not viable: requires 0 arguments, but 1 was provided [CppInteropParseNote]
// CHECK:STDERR: 2 | auto base() -> void;
// CHECK:STDERR: | ^
// CHECK:STDERR:
Cpp.r#base(1);
}
// ============================================================================
// Overloaded
// ============================================================================
// --- overloaded.h
auto overloaded_foo() -> void;
auto overloaded_foo(int value) -> void;
// --- import_overloaded.carbon
library "[[@TEST_NAME]]";
import Cpp library "overloaded.h";
fn F() {
//@dump-sem-ir-begin
Cpp.overloaded_foo();
//@dump-sem-ir-end
}
// ============================================================================
// Variadic arguments
// ============================================================================
// --- variadic.h
auto variadic_foo(int x, ...) -> void;
// --- fail_todo_import_variadic.carbon
library "[[@TEST_NAME]]";
import Cpp library "variadic.h";
fn F() {
//@dump-sem-ir-begin
// CHECK:STDERR: fail_todo_import_variadic.carbon:[[@LINE+4]]:3: error: semantics TODO: `Unsupported: Variadic function` [SemanticsTodo]
// CHECK:STDERR: Cpp.variadic_foo(8);
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
Cpp.variadic_foo(8);
//@dump-sem-ir-end
}
// ============================================================================
// Static
// ============================================================================
// --- static.h
// TODO: Promote this warning to an error by default.
// CHECK:STDERR: ./static.h:[[@LINE+3]]:13: warning: function 'static_foo' has internal linkage but is not defined [CppInteropParseWarning]
// CHECK:STDERR: 6 | static auto static_foo() -> void;
// CHECK:STDERR: | ^
static auto static_foo() -> void;
// --- todo_fail_import_static.carbon
library "[[@TEST_NAME]]";
import Cpp library "static.h";
fn F() {
//@dump-sem-ir-begin
// CHECK:STDERR: todo_fail_import_static.carbon:[[@LINE+4]]:18: note: used here [CppInteropParseNote]
// CHECK:STDERR: 12 | Cpp.static_foo();
// CHECK:STDERR: | ^
// CHECK:STDERR:
Cpp.static_foo();
//@dump-sem-ir-end
}
// --- template_function.h
template<typename T>
auto template_foo(T a) -> void;
template<typename T>
auto template_bar(T a) -> T;
// --- import_template_function.carbon
library "[[@TEST_NAME]]";
import Cpp library "template_function.h";
fn F() {
//@dump-sem-ir-begin
Cpp.template_foo(1 as i32);
//@dump-sem-ir-end
}
fn G() -> i32 {
//@dump-sem-ir-begin
return Cpp.template_bar(1 as i32);
//@dump-sem-ir-end
}
// TODO: Add a test per unsupported param type. See https://github.com/carbon-language/carbon-lang/pull/5477/files/4321e21ed27d987fd71be182d292973fd9849df8#r2094655176
// TODO: Add a test per unsupported return type. See https://github.com/carbon-language/carbon-lang/pull/5477/files/4321e21ed27d987fd71be182d292973fd9849df8#r2094655176
// CHECK:STDOUT: --- import_global.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: type: type = facet_type <type> [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %global_foo.cpp_overload_set.type: type = cpp_overload_set_type @global_foo.cpp_overload_set [concrete]
// CHECK:STDOUT: %global_foo.cpp_overload_set.value: %global_foo.cpp_overload_set.type = cpp_overload_set_value @global_foo.cpp_overload_set [concrete]
// CHECK:STDOUT: %global_foo.type: type = fn_type @global_foo [concrete]
// CHECK:STDOUT: %global_foo: %global_foo.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT: .global_foo = %global_foo.cpp_overload_set.value
// CHECK:STDOUT: import Cpp//...
// CHECK:STDOUT: }
// CHECK:STDOUT: %global_foo.cpp_overload_set.value: %global_foo.cpp_overload_set.type = cpp_overload_set_value @global_foo.cpp_overload_set [concrete = constants.%global_foo.cpp_overload_set.value]
// CHECK:STDOUT: %global_foo.decl: %global_foo.type = fn_decl @global_foo [concrete = constants.%global_foo] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @MyF() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %global_foo.ref: %global_foo.cpp_overload_set.type = name_ref global_foo, imports.%global_foo.cpp_overload_set.value [concrete = constants.%global_foo.cpp_overload_set.value]
// CHECK:STDOUT: %global_foo.call: init %empty_tuple.type = call imports.%global_foo.decl()
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- import_special_name_call_escaped.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: type: type = facet_type <type> [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %base.cpp_overload_set.type: type = cpp_overload_set_type @base.cpp_overload_set [concrete]
// CHECK:STDOUT: %base.cpp_overload_set.value: %base.cpp_overload_set.type = cpp_overload_set_value @base.cpp_overload_set [concrete]
// CHECK:STDOUT: %base.type: type = fn_type @base [concrete]
// CHECK:STDOUT: %base: %base.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT: .r#base = %base.cpp_overload_set.value
// CHECK:STDOUT: import Cpp//...
// CHECK:STDOUT: }
// CHECK:STDOUT: %base.cpp_overload_set.value: %base.cpp_overload_set.type = cpp_overload_set_value @base.cpp_overload_set [concrete = constants.%base.cpp_overload_set.value]
// CHECK:STDOUT: %base.decl: %base.type = fn_decl @base [concrete = constants.%base] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @MyF() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %base.ref: %base.cpp_overload_set.type = name_ref r#base, imports.%base.cpp_overload_set.value [concrete = constants.%base.cpp_overload_set.value]
// CHECK:STDOUT: %base.call: init %empty_tuple.type = call imports.%base.decl()
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- import_overloaded.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: type: type = facet_type <type> [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %overloaded_foo.cpp_overload_set.type: type = cpp_overload_set_type @overloaded_foo.cpp_overload_set [concrete]
// CHECK:STDOUT: %overloaded_foo.cpp_overload_set.value: %overloaded_foo.cpp_overload_set.type = cpp_overload_set_value @overloaded_foo.cpp_overload_set [concrete]
// CHECK:STDOUT: %overloaded_foo.type: type = fn_type @overloaded_foo [concrete]
// CHECK:STDOUT: %overloaded_foo: %overloaded_foo.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT: .overloaded_foo = %overloaded_foo.cpp_overload_set.value
// CHECK:STDOUT: import Cpp//...
// CHECK:STDOUT: }
// CHECK:STDOUT: %overloaded_foo.cpp_overload_set.value: %overloaded_foo.cpp_overload_set.type = cpp_overload_set_value @overloaded_foo.cpp_overload_set [concrete = constants.%overloaded_foo.cpp_overload_set.value]
// CHECK:STDOUT: %overloaded_foo.decl: %overloaded_foo.type = fn_decl @overloaded_foo [concrete = constants.%overloaded_foo] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %overloaded_foo.ref: %overloaded_foo.cpp_overload_set.type = name_ref overloaded_foo, imports.%overloaded_foo.cpp_overload_set.value [concrete = constants.%overloaded_foo.cpp_overload_set.value]
// CHECK:STDOUT: %overloaded_foo.call: init %empty_tuple.type = call imports.%overloaded_foo.decl()
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_todo_import_variadic.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: type: type = facet_type <type> [concrete]
// CHECK:STDOUT: %variadic_foo.cpp_overload_set.type: type = cpp_overload_set_type @variadic_foo.cpp_overload_set [concrete]
// CHECK:STDOUT: %variadic_foo.cpp_overload_set.value: %variadic_foo.cpp_overload_set.type = cpp_overload_set_value @variadic_foo.cpp_overload_set [concrete]
// CHECK:STDOUT: %int_8: Core.IntLiteral = int_value 8 [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT: .variadic_foo = %variadic_foo.cpp_overload_set.value
// CHECK:STDOUT: import Cpp//...
// CHECK:STDOUT: }
// CHECK:STDOUT: %variadic_foo.cpp_overload_set.value: %variadic_foo.cpp_overload_set.type = cpp_overload_set_value @variadic_foo.cpp_overload_set [concrete = constants.%variadic_foo.cpp_overload_set.value]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %variadic_foo.ref: %variadic_foo.cpp_overload_set.type = name_ref variadic_foo, imports.%variadic_foo.cpp_overload_set.value [concrete = constants.%variadic_foo.cpp_overload_set.value]
// CHECK:STDOUT: %int_8: Core.IntLiteral = int_value 8 [concrete = constants.%int_8]
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- todo_fail_import_static.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: type: type = facet_type <type> [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %static_foo.cpp_overload_set.type: type = cpp_overload_set_type @static_foo.cpp_overload_set [concrete]
// CHECK:STDOUT: %static_foo.cpp_overload_set.value: %static_foo.cpp_overload_set.type = cpp_overload_set_value @static_foo.cpp_overload_set [concrete]
// CHECK:STDOUT: %static_foo.type: type = fn_type @static_foo [concrete]
// CHECK:STDOUT: %static_foo: %static_foo.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT: .static_foo = %static_foo.cpp_overload_set.value
// CHECK:STDOUT: import Cpp//...
// CHECK:STDOUT: }
// CHECK:STDOUT: %static_foo.cpp_overload_set.value: %static_foo.cpp_overload_set.type = cpp_overload_set_value @static_foo.cpp_overload_set [concrete = constants.%static_foo.cpp_overload_set.value]
// CHECK:STDOUT: %static_foo.decl: %static_foo.type = fn_decl @static_foo [concrete = constants.%static_foo] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %static_foo.ref: %static_foo.cpp_overload_set.type = name_ref static_foo, imports.%static_foo.cpp_overload_set.value [concrete = constants.%static_foo.cpp_overload_set.value]
// CHECK:STDOUT: %static_foo.call: init %empty_tuple.type = call imports.%static_foo.decl()
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- import_template_function.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: type: type = facet_type <type> [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %template_foo.cpp_overload_set.type: type = cpp_overload_set_type @template_foo.cpp_overload_set [concrete]
// CHECK:STDOUT: %template_foo.cpp_overload_set.value: %template_foo.cpp_overload_set.type = cpp_overload_set_value @template_foo.cpp_overload_set [concrete]
// CHECK:STDOUT: %int_1.5b8: Core.IntLiteral = int_value 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: %As.type.b93: type = facet_type <@As, @As(%i32)> [concrete]
// CHECK:STDOUT: %To: Core.IntLiteral = symbolic_binding To, 0 [symbolic]
// CHECK:STDOUT: %Core.IntLiteral.as.As.impl.Convert.type.396: type = fn_type @Core.IntLiteral.as.As.impl.Convert, @Core.IntLiteral.as.As.impl(%To) [symbolic]
// CHECK:STDOUT: %Core.IntLiteral.as.As.impl.Convert.84a: %Core.IntLiteral.as.As.impl.Convert.type.396 = struct_value () [symbolic]
// CHECK:STDOUT: %As.impl_witness.e09: <witness> = impl_witness imports.%As.impl_witness_table.1c2, @Core.IntLiteral.as.As.impl(%int_32) [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.As.impl.Convert.type.2b0: type = fn_type @Core.IntLiteral.as.As.impl.Convert, @Core.IntLiteral.as.As.impl(%int_32) [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.As.impl.Convert.94f: %Core.IntLiteral.as.As.impl.Convert.type.2b0 = struct_value () [concrete]
// CHECK:STDOUT: %As.facet: %As.type.b93 = facet_value Core.IntLiteral, (%As.impl_witness.e09) [concrete]
// CHECK:STDOUT: %As.WithSelf.Convert.type.2be: type = fn_type @As.WithSelf.Convert, @As.WithSelf(%i32, %As.facet) [concrete]
// CHECK:STDOUT: %.979: type = fn_type_with_self_type %As.WithSelf.Convert.type.2be, %As.facet [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.As.impl.Convert.bound: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.As.impl.Convert.94f [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.As.impl.Convert.specific_fn: <specific function> = specific_function %Core.IntLiteral.as.As.impl.Convert.94f, @Core.IntLiteral.as.As.impl.Convert(%int_32) [concrete]
// CHECK:STDOUT: %bound_method: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.As.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT: %int_1.68a: %i32 = int_value 1 [concrete]
// CHECK:STDOUT: %template_foo.type: type = fn_type @template_foo [concrete]
// CHECK:STDOUT: %template_foo: %template_foo.type = struct_value () [concrete]
// CHECK:STDOUT: %template_bar.cpp_overload_set.type: type = cpp_overload_set_type @template_bar.cpp_overload_set [concrete]
// CHECK:STDOUT: %template_bar.cpp_overload_set.value: %template_bar.cpp_overload_set.type = cpp_overload_set_value @template_bar.cpp_overload_set [concrete]
// CHECK:STDOUT: %template_bar.type: type = fn_type @template_bar [concrete]
// CHECK:STDOUT: %template_bar: %template_bar.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT: .template_foo = %template_foo.cpp_overload_set.value
// CHECK:STDOUT: .template_bar = %template_bar.cpp_overload_set.value
// CHECK:STDOUT: import Cpp//...
// CHECK:STDOUT: }
// CHECK:STDOUT: %template_foo.cpp_overload_set.value: %template_foo.cpp_overload_set.type = cpp_overload_set_value @template_foo.cpp_overload_set [concrete = constants.%template_foo.cpp_overload_set.value]
// CHECK:STDOUT: %Core.import_ref.9e0: @Core.IntLiteral.as.As.impl.%Core.IntLiteral.as.As.impl.Convert.type (%Core.IntLiteral.as.As.impl.Convert.type.396) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Core.IntLiteral.as.As.impl.%Core.IntLiteral.as.As.impl.Convert (constants.%Core.IntLiteral.as.As.impl.Convert.84a)]
// CHECK:STDOUT: %As.impl_witness_table.1c2 = impl_witness_table (%Core.import_ref.9e0), @Core.IntLiteral.as.As.impl [concrete]
// CHECK:STDOUT: %template_foo.decl: %template_foo.type = fn_decl @template_foo [concrete = constants.%template_foo] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: %template_bar.cpp_overload_set.value: %template_bar.cpp_overload_set.type = cpp_overload_set_value @template_bar.cpp_overload_set [concrete = constants.%template_bar.cpp_overload_set.value]
// CHECK:STDOUT: %template_bar.decl: %template_bar.type = fn_decl @template_bar [concrete = constants.%template_bar] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %template_foo.ref: %template_foo.cpp_overload_set.type = name_ref template_foo, imports.%template_foo.cpp_overload_set.value [concrete = constants.%template_foo.cpp_overload_set.value]
// CHECK:STDOUT: %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT: %i32: type = type_literal constants.%i32 [concrete = constants.%i32]
// CHECK:STDOUT: %impl.elem0: %.979 = impl_witness_access constants.%As.impl_witness.e09, element0 [concrete = constants.%Core.IntLiteral.as.As.impl.Convert.94f]
// CHECK:STDOUT: %bound_method.loc8_22.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Core.IntLiteral.as.As.impl.Convert.bound]
// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @Core.IntLiteral.as.As.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.As.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc8_22.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
// CHECK:STDOUT: %Core.IntLiteral.as.As.impl.Convert.call: init %i32 = call %bound_method.loc8_22.2(%int_1) [concrete = constants.%int_1.68a]
// CHECK:STDOUT: %.loc8_22.1: %i32 = value_of_initializer %Core.IntLiteral.as.As.impl.Convert.call [concrete = constants.%int_1.68a]
// CHECK:STDOUT: %.loc8_22.2: %i32 = converted %int_1, %.loc8_22.1 [concrete = constants.%int_1.68a]
// CHECK:STDOUT: %template_foo.call: init %empty_tuple.type = call imports.%template_foo.decl(%.loc8_22.2)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @G() -> out %return.param: %i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %template_bar.ref: %template_bar.cpp_overload_set.type = name_ref template_bar, imports.%template_bar.cpp_overload_set.value [concrete = constants.%template_bar.cpp_overload_set.value]
// CHECK:STDOUT: %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT: %i32.loc14: type = type_literal constants.%i32 [concrete = constants.%i32]
// CHECK:STDOUT: %impl.elem0: %.979 = impl_witness_access constants.%As.impl_witness.e09, element0 [concrete = constants.%Core.IntLiteral.as.As.impl.Convert.94f]
// CHECK:STDOUT: %bound_method.loc14_29.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Core.IntLiteral.as.As.impl.Convert.bound]
// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @Core.IntLiteral.as.As.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.As.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc14_29.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
// CHECK:STDOUT: %Core.IntLiteral.as.As.impl.Convert.call: init %i32 = call %bound_method.loc14_29.2(%int_1) [concrete = constants.%int_1.68a]
// CHECK:STDOUT: %.loc14_29.1: %i32 = value_of_initializer %Core.IntLiteral.as.As.impl.Convert.call [concrete = constants.%int_1.68a]
// CHECK:STDOUT: %.loc14_29.2: %i32 = converted %int_1, %.loc14_29.1 [concrete = constants.%int_1.68a]
// CHECK:STDOUT: %template_bar.call: init %i32 = call imports.%template_bar.decl(%.loc14_29.2)
// CHECK:STDOUT: return %template_bar.call
// CHECK:STDOUT: }
// CHECK:STDOUT:
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