carbon-lang/toolchain/check/testdata/interop/cpp/function/in_template.carbon

// 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/function/in_template.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/function/in_template.carbon

// --- class_template.h

template<typename T> struct X {
  static void f(T t);
};

// TODO: We should be able to instantiate the class when needed.
template struct X<int>;

using Y = X<int>;

// --- use_class_template.carbon

library "[[@TEST_NAME]]";

import Cpp library "class_template.h";

fn F() {
  //@dump-sem-ir-begin
  Cpp.Y.f(42);
  //@dump-sem-ir-end
}

// CHECK:STDOUT: --- use_class_template.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT:   %X: type = class_type @X [concrete]
// CHECK:STDOUT:   %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT:   %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT:   %f.type: type = fn_type @f [concrete]
// CHECK:STDOUT:   %f: %f.type = struct_value () [concrete]
// CHECK:STDOUT:   %int_42.20e: Core.IntLiteral = int_value 42 [concrete]
// CHECK:STDOUT:   %ImplicitAs.type.205: type = facet_type <@ImplicitAs, @ImplicitAs(%i32)> [concrete]
// CHECK:STDOUT:   %Convert.type.1b6: type = fn_type @Convert.1, @ImplicitAs(%i32) [concrete]
// CHECK:STDOUT:   %To: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
// CHECK:STDOUT:   %Convert.type.0f9: type = fn_type @Convert.2, @ImplicitAs.impl.4f9(%To) [symbolic]
// CHECK:STDOUT:   %Convert.f06: %Convert.type.0f9 = struct_value () [symbolic]
// CHECK:STDOUT:   %ImplicitAs.impl_witness.c75: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.a2f, @ImplicitAs.impl.4f9(%int_32) [concrete]
// CHECK:STDOUT:   %Convert.type.035: type = fn_type @Convert.2, @ImplicitAs.impl.4f9(%int_32) [concrete]
// CHECK:STDOUT:   %Convert.956: %Convert.type.035 = struct_value () [concrete]
// CHECK:STDOUT:   %ImplicitAs.facet: %ImplicitAs.type.205 = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.c75) [concrete]
// CHECK:STDOUT:   %.9c3: type = fn_type_with_self_type %Convert.type.1b6, %ImplicitAs.facet [concrete]
// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_42.20e, %Convert.956 [concrete]
// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.956, @Convert.2(%int_32) [concrete]
// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_42.20e, %Convert.specific_fn [concrete]
// CHECK:STDOUT:   %int_42.c68: %i32 = int_value 42 [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .Y = %X.decl
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %X.decl: type = class_decl @X [concrete = constants.%X] {} {}
// CHECK:STDOUT:   %f.decl: %f.type = fn_decl @f [concrete = constants.%f] {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import_ref.a5b: @ImplicitAs.impl.4f9.%Convert.type (%Convert.type.0f9) = import_ref Core//prelude/parts/int, loc16_39, loaded [symbolic = @ImplicitAs.impl.4f9.%Convert (constants.%Convert.f06)]
// CHECK:STDOUT:   %ImplicitAs.impl_witness_table.a2f = impl_witness_table (%Core.import_ref.a5b), @ImplicitAs.impl.4f9 [concrete]
// 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:   <elided>
// CHECK:STDOUT:   %Y.ref: type = name_ref Y, imports.%X.decl [concrete = constants.%X]
// CHECK:STDOUT:   %f.ref: %f.type = name_ref f, imports.%f.decl [concrete = constants.%f]
// CHECK:STDOUT:   %int_42: Core.IntLiteral = int_value 42 [concrete = constants.%int_42.20e]
// CHECK:STDOUT:   %impl.elem0: %.9c3 = impl_witness_access constants.%ImplicitAs.impl_witness.c75, element0 [concrete = constants.%Convert.956]
// CHECK:STDOUT:   %bound_method.loc8_11.1: <bound method> = bound_method %int_42, %impl.elem0 [concrete = constants.%Convert.bound]
// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.2(constants.%int_32) [concrete = constants.%Convert.specific_fn]
// CHECK:STDOUT:   %bound_method.loc8_11.2: <bound method> = bound_method %int_42, %specific_fn [concrete = constants.%bound_method]
// CHECK:STDOUT:   %int.convert_checked: init %i32 = call %bound_method.loc8_11.2(%int_42) [concrete = constants.%int_42.c68]
// CHECK:STDOUT:   %.loc8_11.1: %i32 = value_of_initializer %int.convert_checked [concrete = constants.%int_42.c68]
// CHECK:STDOUT:   %.loc8_11.2: %i32 = converted %int_42, %.loc8_11.1 [concrete = constants.%int_42.c68]
// CHECK:STDOUT:   %f.call: init %empty_tuple.type = call %f.ref(%.loc8_11.2)
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: