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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>
178 lines
7.8 KiB
Plaintext
178 lines
7.8 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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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/convert.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/class/fail_incomplete.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/class/fail_incomplete.carbon
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// --- fail_forward_decl.carbon
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library "[[@TEST_NAME]]";
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class Class;
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE+7]]:4: error: cannot declare a member of incomplete class `Class` [QualifiedDeclInIncompleteClassScope]
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// CHECK:STDERR: fn Class.Function() {}
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// CHECK:STDERR: ^~~~~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-5]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
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// CHECK:STDERR: class Class;
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// CHECK:STDERR: ^~~~~~~~~~~~
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// CHECK:STDERR:
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fn Class.Function() {}
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fn CallClassFunction() {
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE+7]]:3: error: member access into incomplete class `Class` [QualifiedExprInIncompleteClassScope]
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// CHECK:STDERR: Class.Function();
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// CHECK:STDERR: ^~~~~~~~~~~~~~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-15]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
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// CHECK:STDERR: class Class;
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// CHECK:STDERR: ^~~~~~~~~~~~
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// CHECK:STDERR:
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Class.Function();
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}
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE+7]]:17: error: binding pattern has incomplete type `Class` in name binding declaration [IncompleteTypeInBindingDecl]
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// CHECK:STDERR: var global_var: Class;
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// CHECK:STDERR: ^~~~~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-25]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
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// CHECK:STDERR: class Class;
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// CHECK:STDERR: ^~~~~~~~~~~~
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// CHECK:STDERR:
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var global_var: Class;
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE+7]]:27: error: function returns incomplete type `Class` [IncompleteTypeInFunctionReturnType]
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// CHECK:STDERR: fn ConvertFromStruct() -> Class { return {}; }
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// CHECK:STDERR: ^~~~~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-34]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
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// CHECK:STDERR: class Class;
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// CHECK:STDERR: ^~~~~~~~~~~~
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// CHECK:STDERR:
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fn ConvertFromStruct() -> Class { return {}; }
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fn G(p: Class*) -> () {
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE+7]]:10: error: member access into object of incomplete type `Class` [IncompleteTypeInMemberAccess]
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// CHECK:STDERR: return p->n;
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// CHECK:STDERR: ^~~~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-44]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
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// CHECK:STDERR: class Class;
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// CHECK:STDERR: ^~~~~~~~~~~~
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// CHECK:STDERR:
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return p->n;
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}
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fn MemberAccess(p: Class*) -> () {
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE+7]]:11: error: member access into object of incomplete type `Class` [IncompleteTypeInMemberAccess]
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// CHECK:STDERR: return (*p).n;
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// CHECK:STDERR: ^~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-55]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
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// CHECK:STDERR: class Class;
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// CHECK:STDERR: ^~~~~~~~~~~~
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// CHECK:STDERR:
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return (*p).n;
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}
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE+7]]:23: error: function returns incomplete type `Class` [IncompleteTypeInFunctionReturnType]
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// CHECK:STDERR: fn Copy(p: Class*) -> Class {
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// CHECK:STDERR: ^~~~~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-65]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
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// CHECK:STDERR: class Class;
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// CHECK:STDERR: ^~~~~~~~~~~~
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// CHECK:STDERR:
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fn Copy(p: Class*) -> Class {
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return *p;
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}
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fn Let(p: Class*) {
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE+7]]:17: error: binding pattern has incomplete type `Class` in name binding declaration [IncompleteTypeInBindingDecl]
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// CHECK:STDERR: let unused c: Class = *p;
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// CHECK:STDERR: ^~~~~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-77]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
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// CHECK:STDERR: class Class;
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// CHECK:STDERR: ^~~~~~~~~~~~
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// CHECK:STDERR:
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let unused c: Class = *p;
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}
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fn TakeIncomplete(c: Class);
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fn ReturnIncomplete() -> Class;
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fn CallTakeIncomplete(p: Class*) {
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE+10]]:18: error: forming value of incomplete type `Class` [IncompleteTypeInValueConversion]
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// CHECK:STDERR: TakeIncomplete(*p);
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// CHECK:STDERR: ^~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-92]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
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// CHECK:STDERR: class Class;
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// CHECK:STDERR: ^~~~~~~~~~~~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-11]]:19: note: initializing function parameter [InCallToFunctionParam]
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// CHECK:STDERR: fn TakeIncomplete(c: Class);
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// CHECK:STDERR: ^~~~~~~~
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// CHECK:STDERR:
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TakeIncomplete(*p);
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE+10]]:18: error: forming value of incomplete type `Class` [IncompleteTypeInValueConversion]
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// CHECK:STDERR: TakeIncomplete({});
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// CHECK:STDERR: ^~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-104]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
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// CHECK:STDERR: class Class;
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// CHECK:STDERR: ^~~~~~~~~~~~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-23]]:19: note: initializing function parameter [InCallToFunctionParam]
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// CHECK:STDERR: fn TakeIncomplete(c: Class);
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// CHECK:STDERR: ^~~~~~~~
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// CHECK:STDERR:
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TakeIncomplete({});
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}
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fn CallReturnIncomplete() {
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE+10]]:3: error: function returns incomplete type `Class` [IncompleteTypeInFunctionReturnType]
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// CHECK:STDERR: ReturnIncomplete();
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-118]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
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// CHECK:STDERR: class Class;
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// CHECK:STDERR: ^~~~~~~~~~~~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-35]]:26: note: return type declared here [IncompleteReturnTypeHere]
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// CHECK:STDERR: fn ReturnIncomplete() -> Class;
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// CHECK:STDERR: ^~~~~
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// CHECK:STDERR:
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ReturnIncomplete();
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}
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class IncompleteRefSelf {
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fn F[ref self: Class]();
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}
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fn CallIncompleteAddrSelf(p: Class*) {
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// TODO: Should this be valid?
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE+10]]:3: error: invalid use of incomplete type `Class` [IncompleteTypeInConversion]
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// CHECK:STDERR: p->(IncompleteRefSelf.F)();
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-137]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
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// CHECK:STDERR: class Class;
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// CHECK:STDERR: ^~~~~~~~~~~~
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// CHECK:STDERR: fail_forward_decl.carbon:[[@LINE-11]]:8: note: initializing function parameter [InCallToFunctionParam]
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// CHECK:STDERR: fn F[ref self: Class]();
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// CHECK:STDERR: ^~~~~~~~~~~~~~~
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// CHECK:STDERR:
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p->(IncompleteRefSelf.F)();
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}
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// --- fail_in_definition.carbon
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library "[[@TEST_NAME]]";
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class C {
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// CHECK:STDERR: fail_in_definition.carbon:[[@LINE+7]]:10: error: field has incomplete type `C` [IncompleteTypeInFieldDecl]
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// CHECK:STDERR: var c: C;
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// CHECK:STDERR: ^
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// CHECK:STDERR: fail_in_definition.carbon:[[@LINE-4]]:1: note: class is incomplete within its definition [ClassIncompleteWithinDefinition]
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// CHECK:STDERR: class C {
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// CHECK:STDERR: ^~~~~~~~~
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// CHECK:STDERR:
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var c: C;
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}
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