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carbon-lang/toolchain/check/testdata/impl/fail_extend_undefined_interface.carbon
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josh11bJosh LRichard SmithDana Jansens
 eb69d7420e First iteration of completing and resolving facet types (#4920) 
* Add `RequireCompleteFacetType` and `ResolveFacetTypeImplWitness` to
`check::Context`. Goal was to move code from `impl.cpp` (mostly) without
functional changes.
* Complete type information is cached with the facet type, and is stored
in a `complete_facet_types()` table.
* Main functional change is to diagnose attempts to use a rewrite
constraint on an associated function. Some existing diagnostics have
been updated.
* Remove `check::Context::RequireDefinedType`:
  * For class types, use `RequireCompleteType`
  * For facet types, use `RequireCompleteFacetType`
* Introduce a `SemIR::SpecificInterface` to hold an interface and
specific id pair.
* Keep the specific interface ids in the impl object.
* Avoid some extra copies in `Dump` functions.
* Future work missing from this PR:
  * Resolving for member access or actions that require impl lookup.
  * Resolving rewrites constraints that refer to non-concrete values.
* Any support for adding implied constraints that result from a `where`
clause (though TODOs have been added).

---------

Co-authored-by: Josh L <josh11b@users.noreply.github.com>
Co-authored-by: Richard Smith <richard@metafoo.co.uk>
Co-authored-by: Dana Jansens <danakj@orodu.net>
2025-02-19 22:10:11 +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
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/impl/fail_extend_undefined_interface.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/impl/fail_extend_undefined_interface.carbon
interface I;
class C {
// CHECK:STDERR: fail_extend_undefined_interface.carbon:[[@LINE+7]]:18: error: impl of undefined interface I [ResolveFacetTypeWithUndefinedInterface]
// CHECK:STDERR: extend impl as I;
// CHECK:STDERR: ^
// CHECK:STDERR: fail_extend_undefined_interface.carbon:[[@LINE-6]]:1: note: interface was forward declared here [InterfaceForwardDeclaredHere]
// CHECK:STDERR: interface I;
// CHECK:STDERR: ^~~~~~~~~~~~
// CHECK:STDERR:
extend impl as I;
}
fn F(c: C) {
// CHECK:STDERR: fail_extend_undefined_interface.carbon:[[@LINE+10]]:3: error: member access into undefined interface I [ResolveFacetTypeWithUndefinedInterface]
// CHECK:STDERR: C.F();
// CHECK:STDERR: ^~~
// CHECK:STDERR: fail_extend_undefined_interface.carbon:[[@LINE-17]]:1: note: interface was forward declared here [InterfaceForwardDeclaredHere]
// CHECK:STDERR: interface I;
// CHECK:STDERR: ^~~~~~~~~~~~
// CHECK:STDERR: fail_extend_undefined_interface.carbon:[[@LINE-10]]:18: note: declared as an extended scope here [FromExtendHere]
// CHECK:STDERR: extend impl as I;
// CHECK:STDERR: ^
// CHECK:STDERR:
C.F();
// CHECK:STDERR: fail_extend_undefined_interface.carbon:[[@LINE+14]]:3: error: member access into undefined interface I [ResolveFacetTypeWithUndefinedInterface]
// CHECK:STDERR: c.F();
// CHECK:STDERR: ^~~
// CHECK:STDERR: fail_extend_undefined_interface.carbon:[[@LINE-28]]:1: note: interface was forward declared here [InterfaceForwardDeclaredHere]
// CHECK:STDERR: interface I;
// CHECK:STDERR: ^~~~~~~~~~~~
// CHECK:STDERR: fail_extend_undefined_interface.carbon:[[@LINE-21]]:18: note: declared as an extended scope here [FromExtendHere]
// CHECK:STDERR: extend impl as I;
// CHECK:STDERR: ^
// CHECK:STDERR:
// CHECK:STDERR: fail_extend_undefined_interface.carbon:[[@LINE-25]]:3: error: impl declared but not defined [ImplMissingDefinition]
// CHECK:STDERR: extend impl as I;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~
// CHECK:STDERR:
c.F();
}
// CHECK:STDOUT: --- fail_extend_undefined_interface.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %I.type: type = facet_type <@I> [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: %F.type: type = fn_type @F [concrete]
// CHECK:STDOUT: %F: %F.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .I = %I.decl
// CHECK:STDOUT: .C = %C.decl
// CHECK:STDOUT: .F = %F.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %I.decl: type = interface_decl @I [concrete = constants.%I.type] {} {}
// CHECK:STDOUT: %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {
// CHECK:STDOUT: %c.patt: %C = binding_pattern c
// CHECK:STDOUT: %c.param_patt: %C = value_param_pattern %c.patt, runtime_param0
// CHECK:STDOUT: } {
// CHECK:STDOUT: %c.param: %C = value_param runtime_param0
// CHECK:STDOUT: %C.ref.loc24: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %c: %C = bind_name c, %c.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @I;
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl: %Self.ref as %I.ref;
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT: impl_decl @impl [concrete] {} {
// CHECK:STDOUT: %Self.ref: type = name_ref Self, constants.%C [concrete = constants.%C]
// CHECK:STDOUT: %I.ref: type = name_ref I, file.%I.decl [concrete = constants.%I.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %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: .I = <poisoned>
// CHECK:STDOUT: .F = <poisoned>
// CHECK:STDOUT: extend @impl.%I.ref
// CHECK:STDOUT: has_error
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%c.param_patt: %C) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %C.ref.loc35: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %F.ref.loc35: <error> = name_ref F, <error> [concrete = <error>]
// CHECK:STDOUT: %c.ref: %C = name_ref c, %c
// CHECK:STDOUT: %F.ref.loc50: <error> = name_ref F, <error> [concrete = <error>]
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
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