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Jon Ross-Perkins
91f0c23124
Building on #3636 which handles the general import case, add special casing for namespaces. Namespaces can be combined cross-IR, so it's a little more complex. The implementation adds import_id to the Namespace instruction as a reference to find the original using the normal structure. This is achieved by moving the name_id to NameScope to free up space. --- I considered a few alternatives... I considered adding import_id to NameScope, but: 1. It's more consistent with things such as Function or Class that provide name_id on the info object rather than the instruction. 2. I thought it more likely that there would be more NameScope cases that might want a name_id rather than the import_id, since ImportRef will typically be used. I considered putting the import source (cross-ref IR id + inst id) on the NameScope versus a separate ImportRef, which seems like the strongest argument towards the NameScope approach because it removes an instruction. That just felt inconsistent though, and the overhead of instruction-per-imported-namespace should be low (theoretically few namespaces should be used). Plus I feel a bit odd adding two generally-unused ids to NameScope. A specialized Namespace structure could also have been created to store the import_id, but that would add an indirection to the NameScope.
45 lines
1.4 KiB
Plaintext
45 lines
1.4 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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namespace Foo;
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namespace Foo.Bar;
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fn Foo.Bar.Wiz() {
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}
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fn Foo.Bar.Baz() {
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Foo.Bar.Wiz();
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}
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// CHECK:STDOUT: --- nested.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %.1: type = tuple_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 {.Foo = %.loc7} [template]
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// CHECK:STDOUT: %.loc7: <namespace> = namespace {.Bar = %.loc8} [template]
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// CHECK:STDOUT: %.loc8: <namespace> = namespace {.Wiz = %Wiz, .Baz = %Baz} [template]
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// CHECK:STDOUT: %Wiz: <function> = fn_decl @Wiz [template]
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// CHECK:STDOUT: %Baz: <function> = fn_decl @Baz [template]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @Wiz() {
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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 @Baz() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %Foo.ref: <namespace> = name_ref Foo, file.%.loc7 [template = file.%.loc7]
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// CHECK:STDOUT: %Bar.ref: <namespace> = name_ref Bar, file.%.loc8 [template = file.%.loc8]
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// CHECK:STDOUT: %Wiz.ref: <function> = name_ref Wiz, file.%Wiz [template = file.%Wiz]
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// CHECK:STDOUT: %.loc14: init () = call %Wiz.ref()
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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