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carbon-lang/toolchain/check/testdata/interop/cpp/function/import/variadic.carbon
T
Richard Smith cefa0397bb More fixes to package and library fingerprinting. (#7297) 
Fix import logic to make all imported packages be children of the
`NameScopeId::Package` scope. Previously, indirectly-imported packages
would end up as children of their importing package's scope, which
resulted in them not being treated as packages at all, and in particular
not being fingerprinted as packages.

Fixing that caused a failure in the fingerprinting logic as we started
to encounter packages with no correspoding import scopes. Instead of
looking for import scopes, use a simpler mechanism to map packages to
their package names, and clean up.

Unfortunately the latter change churns all the fingerprints again :(
Hopefully this is the last time for a while.
2026-06-04 17:41:46 +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/function/import/variadic.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/function/import/variadic.carbon
// --- variadic.h
template<typename ...T>
auto foo(int, T...) -> void;
// --- call_variadic.carbon
library "[[@TEST_NAME]]";
import Cpp library "variadic.h";
fn Call1() {
//@dump-sem-ir-begin
Cpp.foo(1);
//@dump-sem-ir-end
}
fn Call2() {
//@dump-sem-ir-begin
Cpp.foo(1, 2);
//@dump-sem-ir-end
}
fn Call3() {
//@dump-sem-ir-begin
Cpp.foo(1, 2, 3);
//@dump-sem-ir-end
}
// CHECK:STDOUT: --- call_variadic.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %foo.cpp_overload_set.type: type = cpp_overload_set_type @foo.cpp_overload_set [concrete]
// CHECK:STDOUT: %foo.cpp_overload_set.value: %foo.cpp_overload_set.type = cpp_overload_set_value @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: %foo.type.6d9caa.1: type = fn_type @foo.1 [concrete]
// CHECK:STDOUT: %foo.627376.1: %foo.type.6d9caa.1 = struct_value () [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.094: <bound method> = bound_method %int_1.5b8, %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.953: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT: %int_1.0c6: %i32 = int_value 1 [concrete]
// CHECK:STDOUT: %int_2.ecc: Core.IntLiteral = int_value 2 [concrete]
// CHECK:STDOUT: %foo.type.6d9caa.2: type = fn_type @foo.2 [concrete]
// CHECK:STDOUT: %foo.627376.2: %foo.type.6d9caa.2 = struct_value () [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.9f3: <bound method> = bound_method %int_2.ecc, %Core.IntLiteral.as.ImplicitAs.impl.Convert.e39 [concrete]
// CHECK:STDOUT: %bound_method.3cb: <bound method> = bound_method %int_2.ecc, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT: %int_2.295: %i32 = int_value 2 [concrete]
// CHECK:STDOUT: %int_3.1ba: Core.IntLiteral = int_value 3 [concrete]
// CHECK:STDOUT: %foo.type.6d9caa.3: type = fn_type @foo.3 [concrete]
// CHECK:STDOUT: %foo.627376.3: %foo.type.6d9caa.3 = struct_value () [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.485: <bound method> = bound_method %int_3.1ba, %Core.IntLiteral.as.ImplicitAs.impl.Convert.e39 [concrete]
// CHECK:STDOUT: %bound_method.763: <bound method> = bound_method %int_3.1ba, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT: %int_3.410: %i32 = int_value 3 [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT: .foo = %foo.cpp_overload_set.value
// CHECK:STDOUT: import Cpp//...
// CHECK:STDOUT: }
// CHECK:STDOUT: %foo.cpp_overload_set.value: %foo.cpp_overload_set.type = cpp_overload_set_value @foo.cpp_overload_set [concrete = constants.%foo.cpp_overload_set.value]
// CHECK:STDOUT: %foo.decl.6431a3.1: %foo.type.6d9caa.1 = fn_decl @foo.1 [concrete = constants.%foo.627376.1] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// 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: %foo.decl.6431a3.2: %foo.type.6d9caa.2 = fn_decl @foo.2 [concrete = constants.%foo.627376.2] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: %foo.decl.6431a3.3: %foo.type.6d9caa.3 = fn_decl @foo.3 [concrete = constants.%foo.627376.3] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Call1() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %foo.ref: %foo.cpp_overload_set.type = name_ref foo, imports.%foo.cpp_overload_set.value [concrete = constants.%foo.cpp_overload_set.value]
// CHECK:STDOUT: %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT: %impl.elem0: %.1c5 = impl_witness_access constants.%ImplicitAs.impl_witness.a23, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.e39]
// CHECK:STDOUT: %bound_method.loc8_11.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.094]
// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc8_11.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method.953]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call: init %i32 = call %bound_method.loc8_11.2(%int_1) [concrete = constants.%int_1.0c6]
// CHECK:STDOUT: %.loc8_11.1: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call [concrete = constants.%int_1.0c6]
// CHECK:STDOUT: %.loc8_11.2: %i32 = converted %int_1, %.loc8_11.1 [concrete = constants.%int_1.0c6]
// CHECK:STDOUT: %foo.call: init %empty_tuple.type = call imports.%foo.decl.6431a3.1(%.loc8_11.2)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Call2() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %foo.ref: %foo.cpp_overload_set.type = name_ref foo, imports.%foo.cpp_overload_set.value [concrete = constants.%foo.cpp_overload_set.value]
// CHECK:STDOUT: %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT: %int_2: Core.IntLiteral = int_value 2 [concrete = constants.%int_2.ecc]
// CHECK:STDOUT: %impl.elem0.loc14_11: %.1c5 = impl_witness_access constants.%ImplicitAs.impl_witness.a23, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.e39]
// CHECK:STDOUT: %bound_method.loc14_11.1: <bound method> = bound_method %int_1, %impl.elem0.loc14_11 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.094]
// CHECK:STDOUT: %specific_fn.loc14_11: <specific function> = specific_function %impl.elem0.loc14_11, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc14_11.2: <bound method> = bound_method %int_1, %specific_fn.loc14_11 [concrete = constants.%bound_method.953]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc14_11: init %i32 = call %bound_method.loc14_11.2(%int_1) [concrete = constants.%int_1.0c6]
// CHECK:STDOUT: %.loc14_11.1: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc14_11 [concrete = constants.%int_1.0c6]
// CHECK:STDOUT: %.loc14_11.2: %i32 = converted %int_1, %.loc14_11.1 [concrete = constants.%int_1.0c6]
// CHECK:STDOUT: %impl.elem0.loc14_14: %.1c5 = impl_witness_access constants.%ImplicitAs.impl_witness.a23, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.e39]
// CHECK:STDOUT: %bound_method.loc14_14.1: <bound method> = bound_method %int_2, %impl.elem0.loc14_14 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.9f3]
// CHECK:STDOUT: %specific_fn.loc14_14: <specific function> = specific_function %impl.elem0.loc14_14, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc14_14.2: <bound method> = bound_method %int_2, %specific_fn.loc14_14 [concrete = constants.%bound_method.3cb]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc14_14: init %i32 = call %bound_method.loc14_14.2(%int_2) [concrete = constants.%int_2.295]
// CHECK:STDOUT: %.loc14_14.1: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc14_14 [concrete = constants.%int_2.295]
// CHECK:STDOUT: %.loc14_14.2: %i32 = converted %int_2, %.loc14_14.1 [concrete = constants.%int_2.295]
// CHECK:STDOUT: %foo.call: init %empty_tuple.type = call imports.%foo.decl.6431a3.2(%.loc14_11.2, %.loc14_14.2)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Call3() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %foo.ref: %foo.cpp_overload_set.type = name_ref foo, imports.%foo.cpp_overload_set.value [concrete = constants.%foo.cpp_overload_set.value]
// CHECK:STDOUT: %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT: %int_2: Core.IntLiteral = int_value 2 [concrete = constants.%int_2.ecc]
// CHECK:STDOUT: %int_3: Core.IntLiteral = int_value 3 [concrete = constants.%int_3.1ba]
// CHECK:STDOUT: %impl.elem0.loc20_11: %.1c5 = impl_witness_access constants.%ImplicitAs.impl_witness.a23, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.e39]
// CHECK:STDOUT: %bound_method.loc20_11.1: <bound method> = bound_method %int_1, %impl.elem0.loc20_11 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.094]
// CHECK:STDOUT: %specific_fn.loc20_11: <specific function> = specific_function %impl.elem0.loc20_11, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc20_11.2: <bound method> = bound_method %int_1, %specific_fn.loc20_11 [concrete = constants.%bound_method.953]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc20_11: init %i32 = call %bound_method.loc20_11.2(%int_1) [concrete = constants.%int_1.0c6]
// CHECK:STDOUT: %.loc20_11.1: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc20_11 [concrete = constants.%int_1.0c6]
// CHECK:STDOUT: %.loc20_11.2: %i32 = converted %int_1, %.loc20_11.1 [concrete = constants.%int_1.0c6]
// CHECK:STDOUT: %impl.elem0.loc20_14: %.1c5 = impl_witness_access constants.%ImplicitAs.impl_witness.a23, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.e39]
// CHECK:STDOUT: %bound_method.loc20_14.1: <bound method> = bound_method %int_2, %impl.elem0.loc20_14 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.9f3]
// CHECK:STDOUT: %specific_fn.loc20_14: <specific function> = specific_function %impl.elem0.loc20_14, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc20_14.2: <bound method> = bound_method %int_2, %specific_fn.loc20_14 [concrete = constants.%bound_method.3cb]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc20_14: init %i32 = call %bound_method.loc20_14.2(%int_2) [concrete = constants.%int_2.295]
// CHECK:STDOUT: %.loc20_14.1: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc20_14 [concrete = constants.%int_2.295]
// CHECK:STDOUT: %.loc20_14.2: %i32 = converted %int_2, %.loc20_14.1 [concrete = constants.%int_2.295]
// CHECK:STDOUT: %impl.elem0.loc20_17: %.1c5 = impl_witness_access constants.%ImplicitAs.impl_witness.a23, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.e39]
// CHECK:STDOUT: %bound_method.loc20_17.1: <bound method> = bound_method %int_3, %impl.elem0.loc20_17 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.485]
// CHECK:STDOUT: %specific_fn.loc20_17: <specific function> = specific_function %impl.elem0.loc20_17, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc20_17.2: <bound method> = bound_method %int_3, %specific_fn.loc20_17 [concrete = constants.%bound_method.763]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc20_17: init %i32 = call %bound_method.loc20_17.2(%int_3) [concrete = constants.%int_3.410]
// CHECK:STDOUT: %.loc20_17.1: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc20_17 [concrete = constants.%int_3.410]
// CHECK:STDOUT: %.loc20_17.2: %i32 = converted %int_3, %.loc20_17.1 [concrete = constants.%int_3.410]
// CHECK:STDOUT: %foo.call: init %empty_tuple.type = call imports.%foo.decl.6431a3.3(%.loc20_11.2, %.loc20_14.2, %.loc20_17.2)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
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