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https://github.com/carbon-language/carbon-lang.git
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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.
43 lines
1.8 KiB
Plaintext
43 lines
1.8 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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fn Test() {
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// CHECK:STDERR: fail_address_of_error.carbon:[[@LINE+3]]:4: ERROR: Name `undeclared` not found.
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// CHECK:STDERR: &undeclared;
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// CHECK:STDERR: ^~~~~~~~~~
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&undeclared;
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// CHECK:STDERR: fail_address_of_error.carbon:[[@LINE+6]]:3: ERROR: Cannot take the address of non-reference expression.
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// CHECK:STDERR: &(&undeclared);
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// CHECK:STDERR: ^
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// CHECK:STDERR: fail_address_of_error.carbon:[[@LINE+3]]:6: ERROR: Name `undeclared` not found.
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// CHECK:STDERR: &(&undeclared);
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// CHECK:STDERR: ^~~~~~~~~~
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&(&undeclared);
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}
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// CHECK:STDOUT: --- fail_address_of_error.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %.1: type = ptr_type <error> [template]
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// CHECK:STDOUT: %.2: type = ptr_type <error>* [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 {.Test = %Test} [template]
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// CHECK:STDOUT: %Test: <function> = fn_decl @Test [template]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @Test() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %undeclared.ref.loc11: <error> = name_ref undeclared, <error> [template = <error>]
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// CHECK:STDOUT: %.loc11: <error>* = addr_of %undeclared.ref.loc11 [template = <error>]
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// CHECK:STDOUT: %undeclared.ref.loc18: <error> = name_ref undeclared, <error> [template = <error>]
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// CHECK:STDOUT: %.loc18_5: <error>* = addr_of %undeclared.ref.loc18 [template = <error>]
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// CHECK:STDOUT: %.loc18_3: <error>** = addr_of <error> [template = <error>]
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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