mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-03 19:25:50 +01:00
Dana JansensandRichard Smith
0e8d354567
This allows us to import the table for a given impl only once, while we can import many ImplWitness instructions with different specifics for a generic impl. For example in convert_facet_value_to_narrowed_facet_type.carbon we see that a single witness table is imported for the BitAnd interface, with multiple witnesses (for different specifics) imported and sharing the same table. The ImplWitnessTable now contains a back-link to the Impl the witness is for, allowing inst namer to name that interface in the textual semir, and allowing the interface to be found when debugging from a witness. --------- Co-authored-by: Richard Smith <richard@metafoo.co.uk>
84 lines
4.0 KiB
Plaintext
84 lines
4.0 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_redefinition.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_redefinition.carbon
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interface I {}
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impl i32 as I {}
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// CHECK:STDERR: fail_redefinition.carbon:[[@LINE+7]]:1: error: redefinition of `impl i32 as I` [ImplRedefinition]
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// CHECK:STDERR: impl i32 as I {}
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// CHECK:STDERR: ^~~~~~~~~~~~~~~
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// CHECK:STDERR: fail_redefinition.carbon:[[@LINE-5]]:1: note: previous definition was here [ImplPreviousDefinition]
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// CHECK:STDERR: impl i32 as I {}
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// CHECK:STDERR: ^~~~~~~~~~~~~~~
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// CHECK:STDERR:
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impl i32 as I {}
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// CHECK:STDOUT: --- fail_redefinition.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> [concrete]
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// CHECK:STDOUT: %Self: %I.type = bind_symbolic_name Self, 0 [symbolic]
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// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
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// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
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// CHECK:STDOUT: %I.impl_witness.684cdb.1: <witness> = impl_witness file.%I.impl_witness_table.loc13 [concrete]
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// CHECK:STDOUT: %I.impl_witness.684cdb.2: <witness> = impl_witness file.%I.impl_witness_table.loc22 [concrete]
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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, [concrete] {
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// CHECK:STDOUT: .Int = %Core.Int
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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 [concrete] {
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// CHECK:STDOUT: .Core = imports.%Core
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// CHECK:STDOUT: .I = %I.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 [concrete = constants.%I.type] {} {}
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// CHECK:STDOUT: impl_decl @impl.a9ac64.1 [concrete] {} {
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// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
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// CHECK:STDOUT: %i32: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
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// CHECK:STDOUT: %I.ref: type = name_ref I, file.%I.decl [concrete = constants.%I.type]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %I.impl_witness_table.loc13 = impl_witness_table (), @impl.a9ac64.1 [concrete]
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// CHECK:STDOUT: %I.impl_witness.loc13: <witness> = impl_witness %I.impl_witness_table.loc13 [concrete = constants.%I.impl_witness.684cdb.1]
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// CHECK:STDOUT: impl_decl @impl.a9ac64.2 [concrete] {} {
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// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
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// CHECK:STDOUT: %i32: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
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// CHECK:STDOUT: %I.ref: type = name_ref I, file.%I.decl [concrete = constants.%I.type]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %I.impl_witness_table.loc22 = impl_witness_table (), @impl.a9ac64.2 [concrete]
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// CHECK:STDOUT: %I.impl_witness.loc22: <witness> = impl_witness %I.impl_witness_table.loc22 [concrete = constants.%I.impl_witness.684cdb.2]
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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: %Self: %I.type = bind_symbolic_name Self, 0 [symbolic = constants.%Self]
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: .Self = %Self
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// CHECK:STDOUT: witness = ()
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: impl @impl.a9ac64.1: %i32 as %I.ref {
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: witness = file.%I.impl_witness.loc13
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: impl @impl.a9ac64.2: %i32 as %I.ref {
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: witness = file.%I.impl_witness.loc22
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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