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fdb188ccfd
Implementation of unused pattern bindings #2022, continued. Whereas previous PR #6460 took care of parsing, and PR #6479 prepared the stage by using _ in some test cases, this PR has the the actual implementation, using a simple dataflow analysis. --------- Co-authored-by: Burak Emir <bqe@google.com> Co-authored-by: jonmeow <jperkins@google.com>
78 lines
2.3 KiB
Plaintext
78 lines
2.3 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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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/none.carbon
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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/interop/cpp/var/namespace.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/interop/cpp/var/namespace.carbon
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// --- namespace.h
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namespace N {
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class C {};
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C global;
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} // namespace N
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// --- import_namespace.carbon
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library "[[@TEST_NAME]]";
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import Cpp library "namespace.h";
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fn MyF() {
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let unused local: Cpp.N.C = Cpp.N.global;
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}
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// --- type_in_namespace.carbon
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import Cpp inline '''
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namespace N {
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class C {};
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}
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extern N::C c;
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''';
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//@dump-sem-ir-begin
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fn F() {
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// Import `::c` and its type `N::C` without having ever mentioned `N`.
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// This used to cause a crash.
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Cpp.c;
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}
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//@dump-sem-ir-end
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// CHECK:STDOUT: --- type_in_namespace.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %F.type: type = fn_type @F [concrete]
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// CHECK:STDOUT: %F: %F.type = struct_value () [concrete]
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// CHECK:STDOUT: %C: type = class_type @C [concrete]
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// CHECK:STDOUT: %pattern_type: type = pattern_type %C [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: %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
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// CHECK:STDOUT: .c = %c.var
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// CHECK:STDOUT: import Cpp//...
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %c.patt: %pattern_type = ref_binding_pattern c [concrete]
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// CHECK:STDOUT: %c.var_patt: %pattern_type = var_pattern %c.patt [concrete]
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// CHECK:STDOUT: %c.var: ref %C = var %c.var_patt [concrete]
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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: %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @F() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
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// CHECK:STDOUT: %c.ref: ref %C = name_ref c, imports.%c.var [concrete = imports.%c.var]
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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