ea5092a3b0
Sema::MergeFunctionDecl attempts merging two decls even if the old decl is invalid. This can lead to interesting circumstances where we successfully merge the decls but the result makes no sense. Take the following for example: template <typename T> int main(void); int main(void); Sema will not consider these to be overloads of the same name because main can't be overloaded, which means that this must be a redeclaration. In this case the templated decl is compatible with the non-templated decl allowing the Sema::CheckFunctionDeclaration machinery to move on and do bizarre things like setting the previous decl of a non-templated decl to a templated decl! The way I see it, we should just bail from MergeFunctionDecl if the old decl is invalid. This fixes PR16531. llvm-svn: 185779
118 lines
2.4 KiB
C++
118 lines
2.4 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST1
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// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST2
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// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST3
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// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST4
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// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST5
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// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST6
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// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST7
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// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST8
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// RUN: cp %s %t
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// RUN: %clang_cc1 -x c++ %s -std=c++11 -fsyntax-only -verify -DTEST9
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// RUN: not %clang_cc1 -x c++ %t -std=c++11 -fixit -DTEST9
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// RUN: %clang_cc1 -x c++ %t -std=c++11 -fsyntax-only -DTEST9
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// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST10
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// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST11
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// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST12
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// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST13
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// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST14
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#if TEST1
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// expected-no-diagnostics
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typedef int Int;
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typedef char Char;
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typedef Char* Carp;
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Int main(Int argc, Carp argv[]) {
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}
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#elif TEST2
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// expected-no-diagnostics
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typedef int Int;
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typedef char Char;
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typedef Char* Carp;
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Int main(Int argc, Carp argv[], Char *env[]) {
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}
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#elif TEST3
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// expected-no-diagnostics
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int main() {
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}
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#elif TEST4
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static int main() { // expected-error {{'main' is not allowed to be declared static}}
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}
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#elif TEST5
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inline int main() { // expected-error {{'main' is not allowed to be declared inline}}
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}
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#elif TEST6
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void // expected-error {{'main' must return 'int'}}
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main( // expected-error {{first parameter of 'main' (argument count) must be of type 'int'}}
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float a
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) {
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}
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#elif TEST7
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// expected-no-diagnostics
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int main(int argc, const char* const* argv) {
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}
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#elif TEST8
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template<typename T>
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int main() { } // expected-error{{'main' cannot be a template}}
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#elif TEST9
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constexpr int main() { } // expected-error{{'main' is not allowed to be declared constexpr}}
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#elif TEST10
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// PR15100
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// expected-no-diagnostics
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typedef char charT;
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int main(int, const charT**) {}
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#elif TEST11
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// expected-no-diagnostics
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typedef char charT;
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int main(int, charT* const *) {}
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#elif TEST12
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// expected-no-diagnostics
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typedef char charT;
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int main(int, const charT* const *) {}
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#elif TEST13
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int main(void) {}
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template <typename T>
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int main(void); // expected-error{{'main' cannot be a template}}
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#elif TEST14
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template <typename T>
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int main(void); // expected-error{{'main' cannot be a template}}
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int main(void) {}
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#else
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#error Unknown test mode
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#endif
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