Files
carbon-lang/toolchain/check/testdata/impl/fail_undefined_interface.carbon
T
Dana Jansens fe020ee08b Make FacetAccessType evaluate to SymbolicBindingType for type-of a BindSymbolicName (#6115)
The SymbolicBindingType refers to the type value that will be
substituted in for the BindSymbolicName, but holds onto the EntityNameId
from the BindSymbolicName instead of (or in addition to, for now) the
instruction.

The EntityNameId will be used to look in the ScopeStack to find the
witnesses either from the BindSymbolicName instruction, or other
instructions that specify `impls` constraints against the EntityName.

This will allow us to have the `T` in `I(T)` resolve to a `.Self`
reference in the type so that we get type equality with the binding's
type: `T:! I(.Self)`.
2025-10-06 18:56:43 +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
// TODO: Add ranges and switch to "--dump-sem-ir-ranges=only".
// EXTRA-ARGS: --dump-sem-ir-ranges=if-present
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/impl/fail_undefined_interface.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/impl/fail_undefined_interface.carbon
// --- fail_empty_struct.carbon
library "[[@TEST_NAME]]";
interface I;
// CHECK:STDERR: fail_empty_struct.carbon:[[@LINE+7]]:1: error: definition of impl as incomplete facet type `I` [ImplAsIncompleteFacetTypeDefinition]
// CHECK:STDERR: impl {} as I {}
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR: fail_empty_struct.carbon:[[@LINE-4]]:1: note: interface was forward declared here [InterfaceForwardDeclaredHere]
// CHECK:STDERR: interface I;
// CHECK:STDERR: ^~~~~~~~~~~~
// CHECK:STDERR:
impl {} as I {}
// --- fail_class.carbon
library "[[@TEST_NAME]]";
interface J;
class C {}
// CHECK:STDERR: fail_class.carbon:[[@LINE+7]]:1: error: definition of impl as incomplete facet type `J` [ImplAsIncompleteFacetTypeDefinition]
// CHECK:STDERR: impl C as J {}
// CHECK:STDERR: ^~~~~~~~~~~~~
// CHECK:STDERR: fail_class.carbon:[[@LINE-5]]:1: note: interface was forward declared here [InterfaceForwardDeclaredHere]
// CHECK:STDERR: interface J;
// CHECK:STDERR: ^~~~~~~~~~~~
// CHECK:STDERR:
impl C as J {}
// --- fail_incomplete_where.carbon
library "[[@TEST_NAME]]";
class C {}
interface I {}
interface Incomplete;
// CHECK:STDERR: fail_incomplete_where.carbon:[[@LINE+7]]:1: error: definition of impl as incomplete facet type `I where .Self impls Incomplete` [ImplAsIncompleteFacetTypeDefinition]
// CHECK:STDERR: impl C as I where .Self impls Incomplete {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR: fail_incomplete_where.carbon:[[@LINE-5]]:1: note: interface was forward declared here [InterfaceForwardDeclaredHere]
// CHECK:STDERR: interface Incomplete;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
impl C as I where .Self impls Incomplete {}
// --- fail_declaration_incomplete_where_rewrite.carbon
library "[[@TEST_NAME]]";
class C {}
interface J { let T:! type; }
interface Incomplete;
// CHECK:STDERR: fail_declaration_incomplete_where_rewrite.carbon:[[@LINE+7]]:1: error: declaration of impl as incomplete facet type `J where .Self impls Incomplete and .(J.T) = ()` with rewrites [ImplAsIncompleteFacetTypeRewrites]
// CHECK:STDERR: impl C as J where .Self impls Incomplete and .T = ();
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR: fail_declaration_incomplete_where_rewrite.carbon:[[@LINE-5]]:1: note: interface was forward declared here [InterfaceForwardDeclaredHere]
// CHECK:STDERR: interface Incomplete;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
impl C as J where .Self impls Incomplete and .T = ();
// CHECK:STDOUT: --- fail_empty_struct.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %I.type: type = facet_type <@I> [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .I = %I.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %I.decl: type = interface_decl @I [concrete = constants.%I.type] {} {}
// CHECK:STDOUT: impl_decl @empty_struct_type.as.I.impl [concrete] {} {
// CHECK:STDOUT: %.loc12_7.1: %empty_struct_type = struct_literal ()
// CHECK:STDOUT: %.loc12_7.2: type = converted %.loc12_7.1, constants.%empty_struct_type [concrete = constants.%empty_struct_type]
// CHECK:STDOUT: %I.ref: type = name_ref I, file.%I.decl [concrete = constants.%I.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @I;
// CHECK:STDOUT:
// CHECK:STDOUT: impl @empty_struct_type.as.I.impl: %.loc12_7.2 as %I.ref {
// CHECK:STDOUT: !members:
// CHECK:STDOUT: witness = <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_class.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %J.type: type = facet_type <@J> [concrete]
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .J = %J.decl
// CHECK:STDOUT: .C = %C.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %J.decl: type = interface_decl @J [concrete = constants.%J.type] {} {}
// CHECK:STDOUT: %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT: impl_decl @C.as.J.impl [concrete] {} {
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %J.ref: type = name_ref J, file.%J.decl [concrete = constants.%J.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @J;
// CHECK:STDOUT:
// CHECK:STDOUT: impl @C.as.J.impl: %C.ref as %J.ref {
// CHECK:STDOUT: !members:
// CHECK:STDOUT: witness = <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness constants.%empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT: complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_incomplete_where.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT: %I.type: type = facet_type <@I> [concrete]
// CHECK:STDOUT: %Self: %I.type = bind_symbolic_name Self, 0 [symbolic]
// CHECK:STDOUT: %Incomplete.type: type = facet_type <@Incomplete> [concrete]
// CHECK:STDOUT: %.Self: %I.type = bind_symbolic_name .Self [symbolic_self]
// CHECK:STDOUT: %.Self.binding.as_type: type = symbolic_binding_type .Self, %.Self [symbolic_self]
// CHECK:STDOUT: %I_where.type: type = facet_type <@I where .Self impls @Incomplete> [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .C = %C.decl
// CHECK:STDOUT: .I = %I.decl
// CHECK:STDOUT: .Incomplete = %Incomplete.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT: %I.decl: type = interface_decl @I [concrete = constants.%I.type] {} {}
// CHECK:STDOUT: %Incomplete.decl: type = interface_decl @Incomplete [concrete = constants.%Incomplete.type] {} {}
// CHECK:STDOUT: impl_decl @C.as.I.impl [concrete] {} {
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %I.ref: type = name_ref I, file.%I.decl [concrete = constants.%I.type]
// CHECK:STDOUT: %.Self: %I.type = bind_symbolic_name .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %.Self.ref: %I.type = name_ref .Self, %.Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %Incomplete.ref: type = name_ref Incomplete, file.%Incomplete.decl [concrete = constants.%Incomplete.type]
// CHECK:STDOUT: %.Self.as_type: type = facet_access_type %.Self.ref [symbolic_self = constants.%.Self.binding.as_type]
// CHECK:STDOUT: %.loc15_19: type = converted %.Self.ref, %.Self.as_type [symbolic_self = constants.%.Self.binding.as_type]
// CHECK:STDOUT: %.loc15_13: type = where_expr %.Self [concrete = constants.%I_where.type] {
// CHECK:STDOUT: requirement_base_facet_type constants.%I.type
// CHECK:STDOUT: requirement_impls %.loc15_19, %Incomplete.ref
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @I {
// CHECK:STDOUT: %Self: %I.type = bind_symbolic_name Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: witness = ()
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @Incomplete;
// CHECK:STDOUT:
// CHECK:STDOUT: impl @C.as.I.impl: %C.ref as %.loc15_13 {
// CHECK:STDOUT: !members:
// CHECK:STDOUT: witness = <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness constants.%empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT: complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_declaration_incomplete_where_rewrite.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT: %J.type: type = facet_type <@J> [concrete]
// CHECK:STDOUT: %Self: %J.type = bind_symbolic_name Self, 0 [symbolic]
// CHECK:STDOUT: %J.assoc_type: type = assoc_entity_type @J [concrete]
// CHECK:STDOUT: %assoc0: %J.assoc_type = assoc_entity element0, @J.%T [concrete]
// CHECK:STDOUT: %Incomplete.type: type = facet_type <@Incomplete> [concrete]
// CHECK:STDOUT: %.Self: %J.type = bind_symbolic_name .Self [symbolic_self]
// CHECK:STDOUT: %.Self.binding.as_type: type = symbolic_binding_type .Self, %.Self [symbolic_self]
// CHECK:STDOUT: %J.lookup_impl_witness: <witness> = lookup_impl_witness %.Self, @J [symbolic_self]
// CHECK:STDOUT: %impl.elem0: type = impl_witness_access %J.lookup_impl_witness, element0 [symbolic_self]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %J_where.type: type = facet_type <@J where .Self impls @Incomplete and %impl.elem0 = %empty_tuple.type> [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .C = %C.decl
// CHECK:STDOUT: .J = %J.decl
// CHECK:STDOUT: .Incomplete = %Incomplete.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT: %J.decl: type = interface_decl @J [concrete = constants.%J.type] {} {}
// CHECK:STDOUT: %Incomplete.decl: type = interface_decl @Incomplete [concrete = constants.%Incomplete.type] {} {}
// CHECK:STDOUT: impl_decl @C.as.J.impl [concrete] {} {
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %J.ref: type = name_ref J, file.%J.decl [concrete = constants.%J.type]
// CHECK:STDOUT: %.Self: %J.type = bind_symbolic_name .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %.Self.ref.loc15_19: %J.type = name_ref .Self, %.Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %Incomplete.ref: type = name_ref Incomplete, file.%Incomplete.decl [concrete = constants.%Incomplete.type]
// CHECK:STDOUT: %.Self.as_type.loc15_19: type = facet_access_type %.Self.ref.loc15_19 [symbolic_self = constants.%.Self.binding.as_type]
// CHECK:STDOUT: %.loc15_19: type = converted %.Self.ref.loc15_19, %.Self.as_type.loc15_19 [symbolic_self = constants.%.Self.binding.as_type]
// CHECK:STDOUT: %.Self.ref.loc15_46: %J.type = name_ref .Self, %.Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %T.ref: %J.assoc_type = name_ref T, @T.%assoc0 [concrete = constants.%assoc0]
// CHECK:STDOUT: %.Self.as_type.loc15_46: type = facet_access_type %.Self.ref.loc15_46 [symbolic_self = constants.%.Self.binding.as_type]
// CHECK:STDOUT: %.loc15_46: type = converted %.Self.ref.loc15_46, %.Self.as_type.loc15_46 [symbolic_self = constants.%.Self.binding.as_type]
// CHECK:STDOUT: %impl.elem0: type = impl_witness_access constants.%J.lookup_impl_witness, element0 [symbolic_self = constants.%impl.elem0]
// CHECK:STDOUT: %.loc15_52.1: %empty_tuple.type = tuple_literal ()
// CHECK:STDOUT: %.loc15_52.2: type = converted %.loc15_52.1, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT: %.loc15_13: type = where_expr %.Self [concrete = constants.%J_where.type] {
// CHECK:STDOUT: requirement_base_facet_type constants.%J.type
// CHECK:STDOUT: requirement_impls %.loc15_19, %Incomplete.ref
// CHECK:STDOUT: requirement_rewrite %impl.elem0, %.loc15_52.2
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @J {
// CHECK:STDOUT: %Self: %J.type = bind_symbolic_name Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT: %T: type = assoc_const_decl @T [concrete] {
// CHECK:STDOUT: %assoc0: %J.assoc_type = assoc_entity element0, @J.%T [concrete = constants.%assoc0]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .T = @T.%assoc0
// CHECK:STDOUT: witness = (%T)
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @Incomplete;
// CHECK:STDOUT:
// CHECK:STDOUT: generic assoc_const @T(@J.%Self: %J.type) {
// CHECK:STDOUT: assoc_const T:! type;
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @C.as.J.impl: %C.ref as %.loc15_13;
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness constants.%empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT: complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T(constants.%Self) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T(constants.%.Self) {}
// CHECK:STDOUT: