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carbon-lang/toolchain/check/testdata/interop/cpp/template/alias_template.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/none.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/template/alias_template.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/template/alias_template.carbon
// --- alias_template.h
struct A {};
struct B {};
template<typename T, typename U> using First = T;
template<typename T, typename U> using Second = U;
// --- use_alias_template.carbon
library "[[@TEST_NAME]]";
import Cpp library "alias_template.h";
//@dump-sem-ir-begin
var a1: Cpp.First(Cpp.A, Cpp.B) = Cpp.A.A();
var b1: Cpp.First(Cpp.B, Cpp.A) = Cpp.B.B();
var b2: Cpp.Second(Cpp.A, Cpp.B) = Cpp.B.B();
var a2: Cpp.Second(Cpp.B, Cpp.A) = Cpp.A.A();
//@dump-sem-ir-end
// CHECK:STDOUT: --- use_alias_template.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %First.type: type = cpp_type_template_type First [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %First.template: %First.type = struct_value () [concrete]
// CHECK:STDOUT: %A: type = class_type @A [concrete]
// CHECK:STDOUT: %B: type = class_type @B [concrete]
// CHECK:STDOUT: %pattern_type.3fa: type = pattern_type %A [concrete]
// CHECK:STDOUT: %A.A.cpp_overload_set.type: type = cpp_overload_set_type @A.A.cpp_overload_set [concrete]
// CHECK:STDOUT: %A.A.cpp_overload_set.value: %A.A.cpp_overload_set.type = cpp_overload_set_value @A.A.cpp_overload_set [concrete]
// CHECK:STDOUT: %ptr.25f: type = ptr_type %A [concrete]
// CHECK:STDOUT: %A__carbon_thunk.type: type = fn_type @A__carbon_thunk [concrete]
// CHECK:STDOUT: %A__carbon_thunk: %A__carbon_thunk.type = struct_value () [concrete]
// CHECK:STDOUT: %pattern_type.65a: type = pattern_type %B [concrete]
// CHECK:STDOUT: %B.B.cpp_overload_set.type: type = cpp_overload_set_type @B.B.cpp_overload_set [concrete]
// CHECK:STDOUT: %B.B.cpp_overload_set.value: %B.B.cpp_overload_set.type = cpp_overload_set_value @B.B.cpp_overload_set [concrete]
// CHECK:STDOUT: %ptr.dc0: type = ptr_type %B [concrete]
// CHECK:STDOUT: %B__carbon_thunk.type: type = fn_type @B__carbon_thunk [concrete]
// CHECK:STDOUT: %B__carbon_thunk: %B__carbon_thunk.type = struct_value () [concrete]
// CHECK:STDOUT: %Second.type: type = cpp_type_template_type Second [concrete]
// CHECK:STDOUT: %Second.template: %Second.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT: .First = %First.template
// CHECK:STDOUT: .A = %A.decl
// CHECK:STDOUT: .B = %B.decl
// CHECK:STDOUT: .Second = %Second.template
// CHECK:STDOUT: import Cpp//...
// CHECK:STDOUT: }
// CHECK:STDOUT: %First.template: %First.type = struct_value () [concrete = constants.%First.template]
// CHECK:STDOUT: %A.decl: type = class_decl @A [concrete = constants.%A] {} {}
// CHECK:STDOUT: %B.decl: type = class_decl @B [concrete = constants.%B] {} {}
// CHECK:STDOUT: %A.A.cpp_overload_set.value: %A.A.cpp_overload_set.type = cpp_overload_set_value @A.A.cpp_overload_set [concrete = constants.%A.A.cpp_overload_set.value]
// CHECK:STDOUT: %A__carbon_thunk.decl: %A__carbon_thunk.type = fn_decl @A__carbon_thunk [concrete = constants.%A__carbon_thunk] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: %B.B.cpp_overload_set.value: %B.B.cpp_overload_set.type = cpp_overload_set_value @B.B.cpp_overload_set [concrete = constants.%B.B.cpp_overload_set.value]
// CHECK:STDOUT: %B__carbon_thunk.decl: %B__carbon_thunk.type = fn_decl @B__carbon_thunk [concrete = constants.%B__carbon_thunk] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: } {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: %Second.template: %Second.type = struct_value () [concrete = constants.%Second.template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %a1.patt: %pattern_type.3fa = ref_binding_pattern a1 [concrete]
// CHECK:STDOUT: %a1.var_patt: %pattern_type.3fa = var_pattern %a1.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a1.var: ref %A = var %a1.var_patt [concrete]
// CHECK:STDOUT: %a1: ref %A = ref_binding a1, %a1.var [concrete = %a1.var]
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %b1.patt: %pattern_type.65a = ref_binding_pattern b1 [concrete]
// CHECK:STDOUT: %b1.var_patt: %pattern_type.65a = var_pattern %b1.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %b1.var: ref %B = var %b1.var_patt [concrete]
// CHECK:STDOUT: %b1: ref %B = ref_binding b1, %b1.var [concrete = %b1.var]
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %b2.patt: %pattern_type.65a = ref_binding_pattern b2 [concrete]
// CHECK:STDOUT: %b2.var_patt: %pattern_type.65a = var_pattern %b2.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %b2.var: ref %B = var %b2.var_patt [concrete]
// CHECK:STDOUT: %b2: ref %B = ref_binding b2, %b2.var [concrete = %b2.var]
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %a2.patt: %pattern_type.3fa = ref_binding_pattern a2 [concrete]
// CHECK:STDOUT: %a2.var_patt: %pattern_type.3fa = var_pattern %a2.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a2.var: ref %A = var %a2.var_patt [concrete]
// CHECK:STDOUT: %a2: ref %A = ref_binding a2, %a2.var [concrete = %a2.var]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Cpp.ref.loc7: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %A.ref.loc7_38: type = name_ref A, imports.%A.decl [concrete = constants.%A]
// CHECK:STDOUT: %A.ref.loc7_40: %A.A.cpp_overload_set.type = name_ref A, imports.%A.A.cpp_overload_set.value [concrete = constants.%A.A.cpp_overload_set.value]
// CHECK:STDOUT: %.loc7_1: ref %A = splice_block file.%a1.var [concrete = file.%a1.var] {}
// CHECK:STDOUT: %addr.loc7: %ptr.25f = addr_of %.loc7_1
// CHECK:STDOUT: %A__carbon_thunk.call.loc7: init %empty_tuple.type = call imports.%A__carbon_thunk.decl(%addr.loc7)
// CHECK:STDOUT: %.loc7_43: init %A to %.loc7_1 = mark_in_place_init %A__carbon_thunk.call.loc7
// CHECK:STDOUT: assign file.%a1.var, %.loc7_43
// CHECK:STDOUT: %Cpp.ref.loc8: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %B.ref.loc8_38: type = name_ref B, imports.%B.decl [concrete = constants.%B]
// CHECK:STDOUT: %B.ref.loc8_40: %B.B.cpp_overload_set.type = name_ref B, imports.%B.B.cpp_overload_set.value [concrete = constants.%B.B.cpp_overload_set.value]
// CHECK:STDOUT: %.loc8_1: ref %B = splice_block file.%b1.var [concrete = file.%b1.var] {}
// CHECK:STDOUT: %addr.loc8: %ptr.dc0 = addr_of %.loc8_1
// CHECK:STDOUT: %B__carbon_thunk.call.loc8: init %empty_tuple.type = call imports.%B__carbon_thunk.decl(%addr.loc8)
// CHECK:STDOUT: %.loc8_43: init %B to %.loc8_1 = mark_in_place_init %B__carbon_thunk.call.loc8
// CHECK:STDOUT: assign file.%b1.var, %.loc8_43
// CHECK:STDOUT: %Cpp.ref.loc9: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %B.ref.loc9_39: type = name_ref B, imports.%B.decl [concrete = constants.%B]
// CHECK:STDOUT: %B.ref.loc9_41: %B.B.cpp_overload_set.type = name_ref B, imports.%B.B.cpp_overload_set.value [concrete = constants.%B.B.cpp_overload_set.value]
// CHECK:STDOUT: %.loc9_1: ref %B = splice_block file.%b2.var [concrete = file.%b2.var] {}
// CHECK:STDOUT: %addr.loc9: %ptr.dc0 = addr_of %.loc9_1
// CHECK:STDOUT: %B__carbon_thunk.call.loc9: init %empty_tuple.type = call imports.%B__carbon_thunk.decl(%addr.loc9)
// CHECK:STDOUT: %.loc9_44: init %B to %.loc9_1 = mark_in_place_init %B__carbon_thunk.call.loc9
// CHECK:STDOUT: assign file.%b2.var, %.loc9_44
// CHECK:STDOUT: %Cpp.ref.loc10: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %A.ref.loc10_39: type = name_ref A, imports.%A.decl [concrete = constants.%A]
// CHECK:STDOUT: %A.ref.loc10_41: %A.A.cpp_overload_set.type = name_ref A, imports.%A.A.cpp_overload_set.value [concrete = constants.%A.A.cpp_overload_set.value]
// CHECK:STDOUT: %.loc10_1: ref %A = splice_block file.%a2.var [concrete = file.%a2.var] {}
// CHECK:STDOUT: %addr.loc10: %ptr.25f = addr_of %.loc10_1
// CHECK:STDOUT: %A__carbon_thunk.call.loc10: init %empty_tuple.type = call imports.%A__carbon_thunk.decl(%addr.loc10)
// CHECK:STDOUT: %.loc10_44: init %A to %.loc10_1 = mark_in_place_init %A__carbon_thunk.call.loc10
// CHECK:STDOUT: assign file.%a2.var, %.loc10_44
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
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