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carbon-lang/toolchain/check/testdata/interop/cpp/template/concept.carbon
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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/bool.carbon
// EXTRA-ARGS: --clang-arg=--std=c++20
//
// 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/concept.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/template/concept.carbon
// --- concept.h
struct Small {};
struct Large { int n; };
template<typename T> concept IsLarge = sizeof(T) > 1;
// --- use_concept.carbon
library "[[@TEST_NAME]]";
import Cpp library "concept.h";
class X(B:! bool) {
fn Make() -> Self { return {}; }
}
//@dump-sem-ir-begin
var x1: X(Cpp.IsLarge(Cpp.Small)) = X(false).Make();
var x2: X(Cpp.IsLarge(Cpp.Large)) = X(true).Make();
//@dump-sem-ir-end
// CHECK:STDOUT: --- use_concept.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %X.type: type = generic_class_type @X [concrete]
// CHECK:STDOUT: %X.generic: %X.type = struct_value () [concrete]
// CHECK:STDOUT: %IsLarge.type: type = cpp_type_template_type IsLarge [concrete]
// CHECK:STDOUT: %IsLarge.template: %IsLarge.type = struct_value () [concrete]
// CHECK:STDOUT: %Small: type = class_type @Small [concrete]
// CHECK:STDOUT: %false: bool = bool_literal false [concrete]
// CHECK:STDOUT: %X.541: type = class_type @X, @X(%false) [concrete]
// CHECK:STDOUT: %X.Make.type.243: type = fn_type @X.Make, @X(%false) [concrete]
// CHECK:STDOUT: %X.Make.d05: %X.Make.type.243 = struct_value () [concrete]
// CHECK:STDOUT: %pattern_type.26c: type = pattern_type %X.541 [concrete]
// CHECK:STDOUT: %X.Make.specific_fn.932: <specific function> = specific_function %X.Make.d05, @X.Make(%false) [concrete]
// CHECK:STDOUT: %Large: type = class_type @Large [concrete]
// CHECK:STDOUT: %true: bool = bool_literal true [concrete]
// CHECK:STDOUT: %X.7b4: type = class_type @X, @X(%true) [concrete]
// CHECK:STDOUT: %X.Make.type.4b0: type = fn_type @X.Make, @X(%true) [concrete]
// CHECK:STDOUT: %X.Make.42d: %X.Make.type.4b0 = struct_value () [concrete]
// CHECK:STDOUT: %pattern_type.795: type = pattern_type %X.7b4 [concrete]
// CHECK:STDOUT: %X.Make.specific_fn.8a7: <specific function> = specific_function %X.Make.42d, @X.Make(%true) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT: .IsLarge = %IsLarge.template
// CHECK:STDOUT: .Small = %Small.decl
// CHECK:STDOUT: .Large = %Large.decl
// CHECK:STDOUT: import Cpp//...
// CHECK:STDOUT: }
// CHECK:STDOUT: %IsLarge.template: %IsLarge.type = struct_value () [concrete = constants.%IsLarge.template]
// CHECK:STDOUT: %Small.decl: type = class_decl @Small [concrete = constants.%Small] {} {}
// CHECK:STDOUT: %Large.decl: type = class_decl @Large [concrete = constants.%Large] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %x1.patt: %pattern_type.26c = ref_binding_pattern x1 [concrete]
// CHECK:STDOUT: %x1.var_patt: %pattern_type.26c = var_pattern %x1.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %x1.var: ref %X.541 = var %x1.var_patt [concrete]
// CHECK:STDOUT: %.loc11: type = splice_block %X.loc11 [concrete = constants.%X.541] {
// CHECK:STDOUT: %X.ref.loc11: %X.type = name_ref X, %X.decl [concrete = constants.%X.generic]
// CHECK:STDOUT: %Cpp.ref.loc11_11: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %IsLarge.ref.loc11: %IsLarge.type = name_ref IsLarge, imports.%IsLarge.template [concrete = constants.%IsLarge.template]
// CHECK:STDOUT: %Cpp.ref.loc11_23: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %Small.ref: type = name_ref Small, imports.%Small.decl [concrete = constants.%Small]
// CHECK:STDOUT: %false: bool = bool_literal false [concrete = constants.%false]
// CHECK:STDOUT: %X.loc11: type = class_type @X, @X(constants.%false) [concrete = constants.%X.541]
// CHECK:STDOUT: }
// CHECK:STDOUT: %x1: ref %X.541 = ref_binding x1, %x1.var [concrete = %x1.var]
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %x2.patt: %pattern_type.795 = ref_binding_pattern x2 [concrete]
// CHECK:STDOUT: %x2.var_patt: %pattern_type.795 = var_pattern %x2.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %x2.var: ref %X.7b4 = var %x2.var_patt [concrete]
// CHECK:STDOUT: %.loc12: type = splice_block %X.loc12 [concrete = constants.%X.7b4] {
// CHECK:STDOUT: %X.ref.loc12: %X.type = name_ref X, %X.decl [concrete = constants.%X.generic]
// CHECK:STDOUT: %Cpp.ref.loc12_11: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %IsLarge.ref.loc12: %IsLarge.type = name_ref IsLarge, imports.%IsLarge.template [concrete = constants.%IsLarge.template]
// CHECK:STDOUT: %Cpp.ref.loc12_23: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %Large.ref: type = name_ref Large, imports.%Large.decl [concrete = constants.%Large]
// CHECK:STDOUT: %true: bool = bool_literal true [concrete = constants.%true]
// CHECK:STDOUT: %X.loc12: type = class_type @X, @X(constants.%true) [concrete = constants.%X.7b4]
// CHECK:STDOUT: }
// CHECK:STDOUT: %x2: ref %X.7b4 = ref_binding x2, %x2.var [concrete = %x2.var]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %X.ref.loc11: %X.type = name_ref X, file.%X.decl [concrete = constants.%X.generic]
// CHECK:STDOUT: %false: bool = bool_literal false [concrete = constants.%false]
// CHECK:STDOUT: %X.loc11: type = class_type @X, @X(constants.%false) [concrete = constants.%X.541]
// CHECK:STDOUT: %.loc11_45: %X.Make.type.243 = specific_constant @X.%X.Make.decl, @X(constants.%false) [concrete = constants.%X.Make.d05]
// CHECK:STDOUT: %Make.ref.loc11: %X.Make.type.243 = name_ref Make, %.loc11_45 [concrete = constants.%X.Make.d05]
// CHECK:STDOUT: %X.Make.specific_fn.loc11: <specific function> = specific_function %Make.ref.loc11, @X.Make(constants.%false) [concrete = constants.%X.Make.specific_fn.932]
// CHECK:STDOUT: %.loc11_1: ref %X.541 = splice_block file.%x1.var [concrete = file.%x1.var] {}
// CHECK:STDOUT: %X.Make.call.loc11: init %X.541 to %.loc11_1 = call %X.Make.specific_fn.loc11()
// CHECK:STDOUT: assign file.%x1.var, %X.Make.call.loc11
// CHECK:STDOUT: %X.ref.loc12: %X.type = name_ref X, file.%X.decl [concrete = constants.%X.generic]
// CHECK:STDOUT: %true: bool = bool_literal true [concrete = constants.%true]
// CHECK:STDOUT: %X.loc12: type = class_type @X, @X(constants.%true) [concrete = constants.%X.7b4]
// CHECK:STDOUT: %.loc12_44: %X.Make.type.4b0 = specific_constant @X.%X.Make.decl, @X(constants.%true) [concrete = constants.%X.Make.42d]
// CHECK:STDOUT: %Make.ref.loc12: %X.Make.type.4b0 = name_ref Make, %.loc12_44 [concrete = constants.%X.Make.42d]
// CHECK:STDOUT: %X.Make.specific_fn.loc12: <specific function> = specific_function %Make.ref.loc12, @X.Make(constants.%true) [concrete = constants.%X.Make.specific_fn.8a7]
// CHECK:STDOUT: %.loc12_1: ref %X.7b4 = splice_block file.%x2.var [concrete = file.%x2.var] {}
// CHECK:STDOUT: %X.Make.call.loc12: init %X.7b4 to %.loc12_1 = call %X.Make.specific_fn.loc12()
// CHECK:STDOUT: assign file.%x2.var, %X.Make.call.loc12
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
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