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a69c2630f9
This does a few things: * Replaces the single `TypeId` in the `FacetTypeInfo` struct with a vector of `InterfaceId`, `SpecificId` pairs (sorted in id order) representing the set of interface requirements of the facet type. This will later be used to support facet types with multiple interface requirements (as in `I & J` or `I where .Self impls J`). * Replace `InterfaceType` instructions (used as the type of an `InterfaceDecl` instruction) with `FacetType` instructions (introduced in #4460) with a (newly introduced) `FacetTypeFromInterface()` function. * Replace code that consumed `InterfaceType` values with code that consumed `FaceType` values. I've generally left the assumption in the code that it is dealing with a single interface, using the (newly introduced) `FacetTypeInfo::TryAsSingleInterface`, and producing an error otherwise. There isn't yet support for the `&` operator or `where .Self impls`, so this is generally a good assumption for now, except you can get a facet type with no associated interfaces from a `type where`... expression. In some cases, the facet type value is pulled from the evaluation of an `InterfaceDecl` instruction, where the single interface assumption will hold permanently. * Some related cleans up: nicer stringification and formatting of facet types, suppression of some errors when there already was an error. There is still a lot left to do, including: * Type `type` should be a facet type with a reserved id, replacing the built-in instruction. * Code using `TryAsSingleInterface` should generally be upgraded to handle more than (or less than) one interface. Name lookup should be particularly exciting. * Operator `&` should be defined on facet types, unioning their interface and other requirements. * Requirements from a `where` clause don't do anything yet. * Impls and impl lookup need to resolve facet types, and do things like determine if all the associated constants are given values. --------- Co-authored-by: Josh L <josh11b@users.noreply.github.com> Co-authored-by: Geoff Romer <gromer@google.com>
66 lines
2.8 KiB
Plaintext
66 lines
2.8 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/impl/fail_extend_undefined_interface.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/impl/fail_extend_undefined_interface.carbon
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interface I;
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class C {
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// CHECK:STDERR: fail_extend_undefined_interface.carbon:[[@LINE+6]]:3: error: `extend impl` requires a definition for interface `I` [ExtendUndefinedInterface]
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// CHECK:STDERR: extend impl as I;
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~
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// CHECK:STDERR: fail_extend_undefined_interface.carbon:[[@LINE-6]]:1: note: interface was forward declared here [InterfaceForwardDeclaredHere]
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// CHECK:STDERR: interface I;
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// CHECK:STDERR: ^~~~~~~~~~~~
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extend impl as I;
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}
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// CHECK:STDOUT: --- fail_extend_undefined_interface.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %I.type: type = facet_type <@I> [template]
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// CHECK:STDOUT: %C: type = class_type @C [template]
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// CHECK:STDOUT: %.1: type = struct_type {} [template]
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// CHECK:STDOUT: %.2: <witness> = complete_type_witness %.1 [template]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: imports {
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// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [template] {
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// CHECK:STDOUT: import Core//prelude
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// CHECK:STDOUT: import Core//prelude/...
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: file {
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// CHECK:STDOUT: package: <namespace> = namespace [template] {
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// CHECK:STDOUT: .Core = imports.%Core
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// CHECK:STDOUT: .I = %I.decl
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// CHECK:STDOUT: .C = %C.decl
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Core.import = import Core
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// CHECK:STDOUT: %I.decl: type = interface_decl @I [template = constants.%I.type] {} {}
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// CHECK:STDOUT: %C.decl: type = class_decl @C [template = constants.%C] {} {}
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: interface @I;
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// CHECK:STDOUT:
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// CHECK:STDOUT: impl @impl: %Self.ref as %I.ref;
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// CHECK:STDOUT:
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// CHECK:STDOUT: class @C {
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// CHECK:STDOUT: impl_decl @impl [template] {} {
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// CHECK:STDOUT: %Self.ref: type = name_ref Self, constants.%C [template = constants.%C]
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// CHECK:STDOUT: %I.ref: type = name_ref I, file.%I.decl [template = constants.%I.type]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %.loc21: <witness> = complete_type_witness %.1 [template = constants.%.2]
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: .Self = constants.%C
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// CHECK:STDOUT: has_error
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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