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carbon-lang/toolchain/check/testdata/interface/incomplete.carbon
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Dana JansensandJon Ross-Perkins ff0cea55f6 Add require decls to Interface and NamedConstraint (#6321) 
They are not used for impl lookup or verifying anything yet, but now
they appear in the textual semir.

---------

Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
2025-11-11 16:36:15 +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/interface/incomplete.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interface/incomplete.carbon
// --- fail_incomplete_type.carbon
library "[[@TEST_NAME]]";
class C;
interface I {
// CHECK:STDERR: fail_incomplete_type.carbon:[[@LINE+7]]:11: error: associated constant has incomplete type `C` [IncompleteTypeInAssociatedConstantDecl]
// CHECK:STDERR: let T:! C;
// CHECK:STDERR: ^
// CHECK:STDERR: fail_incomplete_type.carbon:[[@LINE-6]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
// CHECK:STDERR: class C;
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR:
let T:! C;
}
// --- fail_incomplete_constraint.carbon
library "[[@TEST_NAME]]";
constraint A;
interface B {
// CHECK:STDERR: fail_incomplete_constraint.carbon:[[@LINE+7]]:17: error: facet type `A` cannot be identified in `require` declaration [RequireImplsUnidentifiedFacetType]
// CHECK:STDERR: require impls A;
// CHECK:STDERR: ^
// CHECK:STDERR: fail_incomplete_constraint.carbon:[[@LINE-6]]:1: note: constraint was forward declared here [NamedConstraintForwardDeclaredHere]
// CHECK:STDERR: constraint A;
// CHECK:STDERR: ^~~~~~~~~~~~~
// CHECK:STDERR:
require impls A;
}
// --- incomplete_interface.carbon
library "[[@TEST_NAME]]";
interface A;
interface B {
require impls A;
}
// --- fail_incomplete_interface_in_where.carbon
library "[[@TEST_NAME]]";
interface A;
interface B {
// CHECK:STDERR: fail_incomplete_interface_in_where.carbon:[[@LINE+7]]:25: error: member access into object of incomplete type `A` [IncompleteTypeInMemberAccess]
// CHECK:STDERR: require impls A where .X = {};
// CHECK:STDERR: ^~
// CHECK:STDERR: fail_incomplete_interface_in_where.carbon:[[@LINE-6]]:1: note: interface was forward declared here [InterfaceForwardDeclaredHere]
// CHECK:STDERR: interface A;
// CHECK:STDERR: ^~~~~~~~~~~~
// CHECK:STDERR:
require impls A where .X = {};
}
// CHECK:STDOUT: --- fail_incomplete_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %I.type: type = facet_type <@I> [concrete]
// CHECK:STDOUT: %Self: %I.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: %I.assoc_type: type = assoc_entity_type @I [concrete]
// CHECK:STDOUT: %assoc0: %I.assoc_type = assoc_entity element0, @I.%T [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: }
// 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: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @I {
// CHECK:STDOUT: %Self: %I.type = symbolic_binding Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT: %T: <error> = assoc_const_decl @T [concrete] {
// CHECK:STDOUT: %assoc0: %I.assoc_type = assoc_entity element0, @I.%T [concrete = constants.%assoc0]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .C = <poisoned>
// CHECK:STDOUT: .T = @T.%assoc0
// CHECK:STDOUT: witness = (%T)
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic assoc_const @T(@I.%Self: %I.type) {
// CHECK:STDOUT: assoc_const T:! <error>;
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C;
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T(constants.%Self) {}
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_incomplete_constraint.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %A.type: type = facet_type <@A> [concrete]
// CHECK:STDOUT: %B.type: type = facet_type <@B> [concrete]
// CHECK:STDOUT: %Self: %B.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .A = %A.decl
// CHECK:STDOUT: .B = %B.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %A.decl: type = constraint_decl @A [concrete = constants.%A.type] {} {}
// CHECK:STDOUT: %B.decl: type = interface_decl @B [concrete = constants.%B.type] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @B {
// CHECK:STDOUT: %Self: %B.type = symbolic_binding Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .A = <poisoned>
// CHECK:STDOUT: witness = ()
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: constraint @A;
// CHECK:STDOUT:
// CHECK:STDOUT: --- incomplete_interface.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %A.type: type = facet_type <@A> [concrete]
// CHECK:STDOUT: %B.type: type = facet_type <@B> [concrete]
// CHECK:STDOUT: %Self: %B.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: %Self.binding.as_type: type = symbolic_binding_type Self, 0, %Self [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .A = %A.decl
// CHECK:STDOUT: .B = %B.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %A.decl: type = interface_decl @A [concrete = constants.%A.type] {} {}
// CHECK:STDOUT: %B.decl: type = interface_decl @B [concrete = constants.%B.type] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @A;
// CHECK:STDOUT:
// CHECK:STDOUT: interface @B {
// CHECK:STDOUT: %Self: %B.type = symbolic_binding Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT: %B.require0.decl = require_decl @B.require0 [concrete] {
// CHECK:STDOUT: require %Self.as_type impls <@A>
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Self.as_type: type = facet_access_type @B.%Self [symbolic = %Self.binding.as_type (constants.%Self.binding.as_type)]
// CHECK:STDOUT: %A.ref: type = name_ref A, file.%A.decl [concrete = constants.%A.type]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .A = <poisoned>
// CHECK:STDOUT: witness = ()
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: @B.require0
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic require @B.require0(@B.%Self: %B.type) {
// CHECK:STDOUT: %Self: %B.type = symbolic_binding Self, 0 [symbolic = %Self (constants.%Self)]
// CHECK:STDOUT: %Self.binding.as_type: type = symbolic_binding_type Self, 0, %Self [symbolic = %Self.binding.as_type (constants.%Self.binding.as_type)]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @B.require0(constants.%Self) {
// CHECK:STDOUT: %Self => constants.%Self
// CHECK:STDOUT: %Self.binding.as_type => constants.%Self.binding.as_type
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_incomplete_interface_in_where.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %A.type: type = facet_type <@A> [concrete]
// CHECK:STDOUT: %B.type: type = facet_type <@B> [concrete]
// CHECK:STDOUT: %Self: %B.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .A = %A.decl
// CHECK:STDOUT: .B = %B.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %A.decl: type = interface_decl @A [concrete = constants.%A.type] {} {}
// CHECK:STDOUT: %B.decl: type = interface_decl @B [concrete = constants.%B.type] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @A;
// CHECK:STDOUT:
// CHECK:STDOUT: interface @B {
// CHECK:STDOUT: %Self: %B.type = symbolic_binding Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .A = <poisoned>
// CHECK:STDOUT: witness = ()
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
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