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https://github.com/carbon-language/carbon-lang.git
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Richard SmithandJon Ross-Perkins
33c1e9ca95
When declaring an associated entity in an interface -- just associated functions for now -- create an associated entity value and corresponding type to represent a "slot in a witness table". Also track the list of associated entities on the interface so that we will eventually be able to check impls against them. Associated entities are represented as the integer index of their slot in a witness table. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
88 lines
3.2 KiB
Plaintext
88 lines
3.2 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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interface HasF {
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fn F();
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}
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class C {
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extend impl as HasF {
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fn F() {}
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}
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}
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fn G(c: C) {
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// TODO: These should do impl lookup. Because that's not implemented yet, they
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// refer to the interface members rather than to the impl members.
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// CHECK:STDERR: fail_todo_extend_impl.carbon:[[@LINE+3]]:3: ERROR: Value of type `<associated <function> in HasF>` is not callable.
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// CHECK:STDERR: C.F();
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// CHECK:STDERR: ^~~~
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C.F();
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// CHECK:STDERR: fail_todo_extend_impl.carbon:[[@LINE+3]]:3: ERROR: Value of type `<associated <function> in HasF>` is not callable.
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// CHECK:STDERR: c.F();
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// CHECK:STDERR: ^~~~
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c.F();
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}
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// CHECK:STDOUT: --- fail_todo_extend_impl.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %.1: type = interface_type @HasF [template]
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// CHECK:STDOUT: %.2: type = assoc_entity_type @HasF, <function> [template]
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// CHECK:STDOUT: %.3: <associated <function> in HasF> = assoc_entity element0, @HasF.%F [template]
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// CHECK:STDOUT: %C: type = class_type @C [template]
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// CHECK:STDOUT: %.4: type = struct_type {} [template]
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// CHECK:STDOUT: %.5: type = tuple_type () [template]
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// CHECK:STDOUT: %.6: type = ptr_type {} [template]
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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 {.HasF = %HasF.decl, .C = %C.decl, .G = %G} [template]
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// CHECK:STDOUT: %HasF.decl = interface_decl @HasF, () [template = constants.%.1]
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// CHECK:STDOUT: %C.decl = class_decl @C, () [template = constants.%C]
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// CHECK:STDOUT: %G: <function> = fn_decl @G [template]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: interface @HasF {
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// CHECK:STDOUT: %F: <function> = fn_decl @F.1 [template]
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// CHECK:STDOUT: %.loc8: <associated <function> in HasF> = assoc_entity element0, %F [template = constants.%.3]
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: .F = %.loc8
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// CHECK:STDOUT: witness = (%F)
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: impl @impl: C as HasF {
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// CHECK:STDOUT: %F: <function> = fn_decl @F.2 [template]
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: .F = %F
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: class @C {
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// CHECK:STDOUT: impl_decl @impl, (<unexpected instref inst+9>)
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: extend name_scope1
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @F.1();
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @F.2() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @G(%c: C) {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [template = constants.%C]
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// CHECK:STDOUT: %F.ref.loc23: <associated <function> in HasF> = name_ref F, @HasF.%.loc8 [template = constants.%.3]
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// CHECK:STDOUT: %c.ref: C = name_ref c, %c
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// CHECK:STDOUT: %F.ref.loc27: <associated <function> in HasF> = name_ref F, @HasF.%.loc8 [template = constants.%.3]
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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