ed7a46a8de
Instead of emitting a redefinition error, check that definitions are equivalent and allow such scenario. A few non-obvious implementation details: * to avoid multiple definitions in the redeclaration chain we just drop the new definition after checking for equivalence; * for checking definition equivalence use ODR hash instead of ASTStructuralEquivalence because it avoids excessive recursive deserialization. Though after detecting a mismatch we do deserialize multiple entities to provide a better error message. rdar://82908223 Differential Revision: https://reviews.llvm.org/D124286
64 lines
2.1 KiB
Objective-C
64 lines
2.1 KiB
Objective-C
// XFAIL: target={{.*}}-aix{{.*}}, target={{.*}}-zos{{.*}}
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// RUN: rm -rf %t
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// RUN: split-file %s %t
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// RUN: %clang_cc1 -emit-llvm -o %t/test.bc -I %t/include %t/test.m -verify \
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// RUN: -fmodules -fimplicit-module-maps -fmodules-cache-path=%t/modules.cache
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// RUN: %clang_cc1 -emit-llvm -o %t/test.bc -I %t/include %t/test.m -verify -DTEST_MAKE_HIDDEN_VISIBLE=1 \
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// RUN: -fmodules -fimplicit-module-maps -fmodules-cache-path=%t/modules.cache
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// RUN: %clang_cc1 -emit-llvm -o %t/test.bc -I %t/include %t/test.m -verify -x objective-c++ \
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// RUN: -fmodules -fimplicit-module-maps -fmodules-cache-path=%t/modules.cache
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// RUN: %clang_cc1 -emit-llvm -o %t/test.bc -I %t/include %t/test.m -verify -DTEST_MAKE_HIDDEN_VISIBLE=1 -x objective-c++ \
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// RUN: -fmodules -fimplicit-module-maps -fmodules-cache-path=%t/modules.cache
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// Test parsing duplicate Objective-C entities when a previous entity is defined
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// in a hidden [sub]module and cannot be used.
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//
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// Testing with header guards and includes on purpose as tracking imports in
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// modules is a separate issue.
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//--- include/textual.h
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#ifndef TEXTUAL_H
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#define TEXTUAL_H
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@protocol TestProtocol
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- (void)someMethod;
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@end
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@protocol ForwardDeclaredProtocolWithoutDefinition;
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id<TestProtocol> protocolDefinition(id<TestProtocol> t);
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id<ForwardDeclaredProtocolWithoutDefinition> forwardDeclaredProtocol(
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id<ForwardDeclaredProtocolWithoutDefinition> t);
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@interface NSObject @end
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@class ForwardDeclaredInterfaceWithoutDefinition;
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NSObject *interfaceDefinition(NSObject *o);
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NSObject *forwardDeclaredInterface(NSObject *o);
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#endif
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//--- include/empty.h
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//--- include/initially_hidden.h
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#include "textual.h"
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//--- include/module.modulemap
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module Piecewise {
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module Empty {
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header "empty.h"
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}
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module InitiallyHidden {
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header "initially_hidden.h"
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export *
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}
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}
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//--- test.m
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// Including empty.h loads the entire module Piecewise but keeps InitiallyHidden hidden.
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#include "empty.h"
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#include "textual.h"
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#ifdef TEST_MAKE_HIDDEN_VISIBLE
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#include "initially_hidden.h"
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#endif
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// expected-no-diagnostics
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