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clang-p2996/clang/test/SemaCXX/calling-conv-compat.cpp
Matheus Izvekov 15f3cd6bfc [clang] Implement ElaboratedType sugaring for types written bare 
Without this patch, clang will not wrap in an ElaboratedType node types written
without a keyword and nested name qualifier, which goes against the intent that
we should produce an AST which retains enough details to recover how things are
written.

The lack of this sugar is incompatible with the intent of the type printer
default policy, which is to print types as written, but to fall back and print
them fully qualified when they are desugared.

An ElaboratedTypeLoc without keyword / NNS uses no storage by itself, but still
requires pointer alignment due to pre-existing bug in the TypeLoc buffer
handling.

---

Troubleshooting list to deal with any breakage seen with this patch:

1) The most likely effect one would see by this patch is a change in how
   a type is printed. The type printer will, by design and default,
   print types as written. There are customization options there, but
   not that many, and they mainly apply to how to print a type that we
   somehow failed to track how it was written. This patch fixes a
   problem where we failed to distinguish between a type
   that was written without any elaborated-type qualifiers,
   such as a 'struct'/'class' tags and name spacifiers such as 'std::',
   and one that has been stripped of any 'metadata' that identifies such,
   the so called canonical types.
   Example:
   ```
   namespace foo {
     struct A {};
     A a;
   };
   ```
   If one were to print the type of `foo::a`, prior to this patch, this
   would result in `foo::A`. This is how the type printer would have,
   by default, printed the canonical type of A as well.
   As soon as you add any name qualifiers to A, the type printer would
   suddenly start accurately printing the type as written. This patch
   will make it print it accurately even when written without
   qualifiers, so we will just print `A` for the initial example, as
   the user did not really write that `foo::` namespace qualifier.

2) This patch could expose a bug in some AST matcher. Matching types
   is harder to get right when there is sugar involved. For example,
   if you want to match a type against being a pointer to some type A,
   then you have to account for getting a type that is sugar for a
   pointer to A, or being a pointer to sugar to A, or both! Usually
   you would get the second part wrong, and this would work for a
   very simple test where you don't use any name qualifiers, but
   you would discover is broken when you do. The usual fix is to
   either use the matcher which strips sugar, which is annoying
   to use as for example if you match an N level pointer, you have
   to put N+1 such matchers in there, beginning to end and between
   all those levels. But in a lot of cases, if the property you want
   to match is present in the canonical type, it's easier and faster
   to just match on that... This goes with what is said in 1), if
   you want to match against the name of a type, and you want
   the name string to be something stable, perhaps matching on
   the name of the canonical type is the better choice.

3) This patch could expose a bug in how you get the source range of some
   TypeLoc. For some reason, a lot of code is using getLocalSourceRange(),
   which only looks at the given TypeLoc node. This patch introduces a new,
   and more common TypeLoc node which contains no source locations on itself.
   This is not an inovation here, and some other, more rare TypeLoc nodes could
   also have this property, but if you use getLocalSourceRange on them, it's not
   going to return any valid locations, because it doesn't have any. The right fix
   here is to always use getSourceRange() or getBeginLoc/getEndLoc which will dive
   into the inner TypeLoc to get the source range if it doesn't find it on the
   top level one. You can use getLocalSourceRange if you are really into
   micro-optimizations and you have some outside knowledge that the TypeLocs you are
   dealing with will always include some source location.

4) Exposed a bug somewhere in the use of the normal clang type class API, where you
   have some type, you want to see if that type is some particular kind, you try a
   `dyn_cast` such as `dyn_cast<TypedefType>` and that fails because now you have an
   ElaboratedType which has a TypeDefType inside of it, which is what you wanted to match.
   Again, like 2), this would usually have been tested poorly with some simple tests with
   no qualifications, and would have been broken had there been any other kind of type sugar,
   be it an ElaboratedType or a TemplateSpecializationType or a SubstTemplateParmType.
   The usual fix here is to use `getAs` instead of `dyn_cast`, which will look deeper
   into the type. Or use `getAsAdjusted` when dealing with TypeLocs.
   For some reason the API is inconsistent there and on TypeLocs getAs behaves like a dyn_cast.

5) It could be a bug in this patch perhaps.

Let me know if you need any help!

Signed-off-by: Matheus Izvekov <mizvekov@gmail.com>

Differential Revision: https://reviews.llvm.org/D112374
2022-07-27 11:10:54 +02:00

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// RUN: %clang_cc1 -fsyntax-only -std=c++11 -fms-extensions -verify -triple i686-pc-win32 %s
// RUN: %clang_cc1 -fsyntax-only -std=c++11 -fms-extensions -verify -triple x86_64-pc-win32 %s
// FIXME: Extend this portion of the test to cover the 64-bit case.
#if !_M_X64
// Pointers to free functions
void free_func_default();
void __cdecl free_func_cdecl();
void __stdcall free_func_stdcall();
void __fastcall free_func_fastcall();
typedef void ( *fptr_default)();
typedef void (__cdecl *fptr_cdecl)();
typedef void (__stdcall *fptr_stdcall)();
typedef void (__fastcall *fptr_fastcall)();
// expected-note@+4 {{candidate function not viable: no known conversion from 'void () __attribute__((stdcall))' to 'fptr_default' (aka 'void (*)()') for 1st argument}}
// expected-note@+3 {{candidate function not viable: no known conversion from 'void () __attribute__((fastcall))' to 'fptr_default' (aka 'void (*)()') for 1st argument}}
// expected-note@+2 {{candidate function not viable: no known conversion from 'void (*)() __attribute__((stdcall))' to 'fptr_default' (aka 'void (*)()') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void (*)() __attribute__((fastcall))' to 'fptr_default' (aka 'void (*)()') for 1st argument}}
void cb_fptr_default(fptr_default ptr);
// expected-note@+4 {{candidate function not viable: no known conversion from 'void () __attribute__((stdcall))' to 'fptr_cdecl' (aka 'void (*)()') for 1st argument}}
// expected-note@+3 {{candidate function not viable: no known conversion from 'void () __attribute__((fastcall))' to 'fptr_cdecl' (aka 'void (*)()') for 1st argument}}
// expected-note@+2 {{candidate function not viable: no known conversion from 'void (*)() __attribute__((stdcall))' to 'fptr_cdecl' (aka 'void (*)()') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void (*)() __attribute__((fastcall))' to 'fptr_cdecl' (aka 'void (*)()') for 1st argument}}
void cb_fptr_cdecl(fptr_cdecl ptr);
// expected-note@+3 {{candidate function not viable: no known conversion from 'void ()' to 'fptr_stdcall' (aka 'void (*)() __attribute__((stdcall))') for 1st argument}}
// expected-note@+2 {{candidate function not viable: no known conversion from 'void () __attribute__((cdecl))' to 'fptr_stdcall' (aka 'void (*)() __attribute__((stdcall))') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void () __attribute__((fastcall))' to 'fptr_stdcall' (aka 'void (*)() __attribute__((stdcall))') for 1st argument}}
void cb_fptr_stdcall(fptr_stdcall ptr);
// expected-note@+3 {{candidate function not viable: no known conversion from 'void ()' to 'fptr_fastcall' (aka 'void (*)() __attribute__((fastcall))') for 1st argument}}
// expected-note@+2 {{candidate function not viable: no known conversion from 'void () __attribute__((cdecl))' to 'fptr_fastcall' (aka 'void (*)() __attribute__((fastcall))') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void () __attribute__((stdcall))' to 'fptr_fastcall' (aka 'void (*)() __attribute__((fastcall))') for 1st argument}}
void cb_fptr_fastcall(fptr_fastcall ptr);
// expected-note@+2 {{candidate function not viable: no known conversion from 'void () __attribute__((stdcall))' to 'const fptr_default' (aka 'void (*const)()') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void () __attribute__((fastcall))' to 'const fptr_default' (aka 'void (*const)()') for 1st argument}}
void cb_fptr_const_default(const fptr_default ptr);
void call_free_func() {
cb_fptr_default(free_func_default);
cb_fptr_default(free_func_cdecl);
cb_fptr_default(free_func_stdcall); // expected-error {{no matching function for call to 'cb_fptr_default'}}
cb_fptr_default(free_func_fastcall); // expected-error {{no matching function for call to 'cb_fptr_default'}}
cb_fptr_default(&free_func_default);
cb_fptr_default(&free_func_cdecl);
cb_fptr_default(&free_func_stdcall); // expected-error {{no matching function for call to 'cb_fptr_default'}}
cb_fptr_default(&free_func_fastcall); // expected-error {{no matching function for call to 'cb_fptr_default'}}
cb_fptr_cdecl(free_func_default);
cb_fptr_cdecl(free_func_cdecl);
cb_fptr_cdecl(free_func_stdcall); // expected-error {{no matching function for call to 'cb_fptr_cdecl'}}
cb_fptr_cdecl(free_func_fastcall); // expected-error {{no matching function for call to 'cb_fptr_cdecl'}}
cb_fptr_cdecl(&free_func_default);
cb_fptr_cdecl(&free_func_cdecl);
cb_fptr_cdecl(&free_func_stdcall); // expected-error {{no matching function for call to 'cb_fptr_cdecl'}}
cb_fptr_cdecl(&free_func_fastcall); // expected-error {{no matching function for call to 'cb_fptr_cdecl'}}
cb_fptr_stdcall(free_func_default); // expected-error {{no matching function for call to 'cb_fptr_stdcall'}}
cb_fptr_stdcall(free_func_cdecl); // expected-error {{no matching function for call to 'cb_fptr_stdcall'}}
cb_fptr_stdcall(free_func_stdcall);
cb_fptr_stdcall(free_func_fastcall); // expected-error {{no matching function for call to 'cb_fptr_stdcall'}}
cb_fptr_fastcall(free_func_default); // expected-error {{no matching function for call to 'cb_fptr_fastcall'}}
cb_fptr_fastcall(free_func_cdecl); // expected-error {{no matching function for call to 'cb_fptr_fastcall'}}
cb_fptr_fastcall(free_func_stdcall); // expected-error {{no matching function for call to 'cb_fptr_fastcall'}}
cb_fptr_fastcall(free_func_fastcall);
cb_fptr_const_default(free_func_default);
cb_fptr_const_default(free_func_cdecl);
cb_fptr_const_default(free_func_stdcall); // expected-error {{no matching function for call to 'cb_fptr_const_default'}}
cb_fptr_const_default(free_func_fastcall); // expected-error {{no matching function for call to 'cb_fptr_const_default'}}
}
// Pointers to variadic functions
// variadic function can't declared stdcall or fastcall
void free_func_variadic_default(int, ...);
void __cdecl free_func_variadic_cdecl(int, ...);
typedef void ( *fptr_variadic_default)(int, ...);
typedef void (__cdecl *fptr_variadic_cdecl)(int, ...);
void cb_fptr_variadic_default(fptr_variadic_default ptr);
void cb_fptr_variadic_cdecl(fptr_variadic_cdecl ptr);
void call_free_variadic_func() {
cb_fptr_variadic_default(free_func_variadic_default);
cb_fptr_variadic_default(free_func_variadic_cdecl);
cb_fptr_variadic_default(&free_func_variadic_default);
cb_fptr_variadic_default(&free_func_variadic_cdecl);
cb_fptr_variadic_cdecl(free_func_variadic_default);
cb_fptr_variadic_cdecl(free_func_variadic_cdecl);
cb_fptr_variadic_cdecl(&free_func_variadic_default);
cb_fptr_variadic_cdecl(&free_func_variadic_cdecl);
}
// References to functions
typedef void ( &fref_default)();
typedef void (__cdecl &fref_cdecl)();
typedef void (__stdcall &fref_stdcall)();
typedef void (__fastcall &fref_fastcall)();
// expected-note@+2 {{candidate function not viable: no known conversion from 'void () __attribute__((stdcall))' to 'fref_default' (aka 'void (&)()') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void () __attribute__((fastcall))' to 'fref_default' (aka 'void (&)()') for 1st argument}}
void cb_fref_default(fref_default ptr);
// expected-note@+2 {{candidate function not viable: no known conversion from 'void () __attribute__((stdcall))' to 'fref_cdecl' (aka 'void (&)()') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void () __attribute__((fastcall))' to 'fref_cdecl' (aka 'void (&)()') for 1st argument}}
void cb_fref_cdecl(fref_cdecl ptr);
// expected-note@+3 {{candidate function not viable: no known conversion from 'void ()' to 'fref_stdcall' (aka 'void (&)() __attribute__((stdcall))') for 1st argument}}
// expected-note@+2 {{candidate function not viable: no known conversion from 'void () __attribute__((cdecl))' to 'fref_stdcall' (aka 'void (&)() __attribute__((stdcall))') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void () __attribute__((fastcall))' to 'fref_stdcall' (aka 'void (&)() __attribute__((stdcall))') for 1st argument}}
void cb_fref_stdcall(fref_stdcall ptr);
// expected-note@+3 {{candidate function not viable: no known conversion from 'void ()' to 'fref_fastcall' (aka 'void (&)() __attribute__((fastcall))') for 1st argument}}
// expected-note@+2 {{candidate function not viable: no known conversion from 'void () __attribute__((cdecl))' to 'fref_fastcall' (aka 'void (&)() __attribute__((fastcall))') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void () __attribute__((stdcall))' to 'fref_fastcall' (aka 'void (&)() __attribute__((fastcall))') for 1st argument}}
void cb_fref_fastcall(fref_fastcall ptr);
void call_free_func_ref() {
cb_fref_default(free_func_default);
cb_fref_default(free_func_cdecl);
cb_fref_default(free_func_stdcall); // expected-error {{no matching function for call to 'cb_fref_default'}}
cb_fref_default(free_func_fastcall); // expected-error {{no matching function for call to 'cb_fref_default'}}
cb_fref_cdecl(free_func_default);
cb_fref_cdecl(free_func_cdecl);
cb_fref_cdecl(free_func_stdcall); // expected-error {{no matching function for call to 'cb_fref_cdecl'}}
cb_fref_cdecl(free_func_fastcall); // expected-error {{no matching function for call to 'cb_fref_cdecl'}}
cb_fref_stdcall(free_func_default); // expected-error {{no matching function for call to 'cb_fref_stdcall'}}
cb_fref_stdcall(free_func_cdecl); // expected-error {{no matching function for call to 'cb_fref_stdcall'}}
cb_fref_stdcall(free_func_stdcall);
cb_fref_stdcall(free_func_fastcall); // expected-error {{no matching function for call to 'cb_fref_stdcall'}}
cb_fref_fastcall(free_func_default); // expected-error {{no matching function for call to 'cb_fref_fastcall'}}
cb_fref_fastcall(free_func_cdecl); // expected-error {{no matching function for call to 'cb_fref_fastcall'}}
cb_fref_fastcall(free_func_stdcall); // expected-error {{no matching function for call to 'cb_fref_fastcall'}}
cb_fref_fastcall(free_func_fastcall);
}
// References to variadic functions
// variadic function can't declared stdcall or fastcall
typedef void ( &fref_variadic_default)(int, ...);
typedef void (__cdecl &fref_variadic_cdecl)(int, ...);
void cb_fref_variadic_default(fptr_variadic_default ptr);
void cb_fref_variadic_cdecl(fptr_variadic_cdecl ptr);
void call_free_variadic_func_ref() {
cb_fref_variadic_default(free_func_variadic_default);
cb_fref_variadic_default(free_func_variadic_cdecl);
cb_fref_variadic_cdecl(free_func_variadic_default);
cb_fref_variadic_cdecl(free_func_variadic_cdecl);
}
// Pointers to members
namespace NonVariadic {
struct A {
void member_default();
void __cdecl member_cdecl();
void __thiscall member_thiscall();
};
struct B : public A {
};
struct C {
void member_default();
void __cdecl member_cdecl();
void __thiscall member_thiscall();
};
typedef void ( A::*memb_a_default)();
typedef void (__cdecl A::*memb_a_cdecl)();
typedef void (__thiscall A::*memb_a_thiscall)();
typedef void ( B::*memb_b_default)();
typedef void (__cdecl B::*memb_b_cdecl)();
typedef void (__thiscall B::*memb_b_thiscall)();
typedef void ( C::*memb_c_default)();
typedef void (__cdecl C::*memb_c_cdecl)();
typedef void (__thiscall C::*memb_c_thiscall)();
// expected-note@+1 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((cdecl))' to 'memb_a_default' (aka 'void (NonVariadic::A::*)() __attribute__((thiscall))') for 1st argument}}
void cb_memb_a_default(memb_a_default ptr);
// expected-note@+2 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((thiscall))' to 'memb_a_cdecl' (aka 'void (NonVariadic::A::*)() __attribute__((cdecl))') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((thiscall))' to 'memb_a_cdecl' (aka 'void (NonVariadic::A::*)() __attribute__((cdecl))') for 1st argument}}
void cb_memb_a_cdecl(memb_a_cdecl ptr);
// expected-note@+1 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((cdecl))' to 'memb_a_thiscall' (aka 'void (NonVariadic::A::*)() __attribute__((thiscall))') for 1st argument}}
void cb_memb_a_thiscall(memb_a_thiscall ptr);
// expected-note@+1 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((cdecl))' to 'memb_b_default' (aka 'void (NonVariadic::B::*)() __attribute__((thiscall))') for 1st argument}}
void cb_memb_b_default(memb_b_default ptr);
// expected-note@+2 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((thiscall))' to 'memb_b_cdecl' (aka 'void (NonVariadic::B::*)() __attribute__((cdecl))') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((thiscall))' to 'memb_b_cdecl' (aka 'void (NonVariadic::B::*)() __attribute__((cdecl))') for 1st argument}}
void cb_memb_b_cdecl(memb_b_cdecl ptr);
// expected-note@+1 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((cdecl))' to 'memb_b_thiscall' (aka 'void (NonVariadic::B::*)() __attribute__((thiscall))') for 1st argument}}
void cb_memb_b_thiscall(memb_b_thiscall ptr);
// expected-note@+3 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((thiscall))' to 'memb_c_default' (aka 'void (NonVariadic::C::*)() __attribute__((thiscall))') for 1st argument}}
// expected-note@+2 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((cdecl))' to 'memb_c_default' (aka 'void (NonVariadic::C::*)() __attribute__((thiscall))') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((thiscall))' to 'memb_c_default' (aka 'void (NonVariadic::C::*)() __attribute__((thiscall))') for 1st argument}}
void cb_memb_c_default(memb_c_default ptr);
// expected-note@+3 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((thiscall))' to 'memb_c_cdecl' (aka 'void (NonVariadic::C::*)() __attribute__((cdecl))') for 1st argument}}
// expected-note@+2 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((cdecl))' to 'memb_c_cdecl' (aka 'void (NonVariadic::C::*)() __attribute__((cdecl))') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((thiscall))' to 'memb_c_cdecl' (aka 'void (NonVariadic::C::*)() __attribute__((cdecl))') for 1st argument}}
void cb_memb_c_cdecl(memb_c_cdecl ptr);
// expected-note@+3 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((thiscall))' to 'memb_c_thiscall' (aka 'void (NonVariadic::C::*)() __attribute__((thiscall))') for 1st argument}}
// expected-note@+2 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((cdecl))' to 'memb_c_thiscall' (aka 'void (NonVariadic::C::*)() __attribute__((thiscall))') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void (NonVariadic::A::*)() __attribute__((thiscall))' to 'memb_c_thiscall' (aka 'void (NonVariadic::C::*)() __attribute__((thiscall))') for 1st argument}}
void cb_memb_c_thiscall(memb_c_thiscall ptr);
void call_member() {
cb_memb_a_default(&A::member_default);
cb_memb_a_default(&A::member_cdecl); // expected-error {{no matching function for call to 'cb_memb_a_default'}}
cb_memb_a_default(&A::member_thiscall);
cb_memb_a_cdecl(&A::member_default); // expected-error {{no matching function for call to 'cb_memb_a_cdecl'}}
cb_memb_a_cdecl(&A::member_cdecl);
cb_memb_a_cdecl(&A::member_thiscall); // expected-error {{no matching function for call to 'cb_memb_a_cdecl'}}
cb_memb_a_thiscall(&A::member_default);
cb_memb_a_thiscall(&A::member_cdecl); // expected-error {{no matching function for call to 'cb_memb_a_thiscall'}}
cb_memb_a_thiscall(&A::member_thiscall);
}
void call_member_inheritance() {
cb_memb_b_default(&A::member_default);
cb_memb_b_default(&A::member_cdecl); // expected-error {{no matching function for call to 'cb_memb_b_default'}}
cb_memb_b_default(&A::member_thiscall);
cb_memb_c_default(&A::member_default); // expected-error {{no matching function for call to 'cb_memb_c_default'}}
cb_memb_c_default(&A::member_cdecl); // expected-error {{no matching function for call to 'cb_memb_c_default'}}
cb_memb_c_default(&A::member_thiscall); // expected-error {{no matching function for call to 'cb_memb_c_default'}}
cb_memb_b_cdecl(&A::member_default); // expected-error {{no matching function for call to 'cb_memb_b_cdecl'}}
cb_memb_b_cdecl(&A::member_cdecl);
cb_memb_b_cdecl(&A::member_thiscall); // expected-error {{no matching function for call to 'cb_memb_b_cdecl'}}
cb_memb_c_cdecl(&A::member_default); // expected-error {{no matching function for call to 'cb_memb_c_cdecl'}}
cb_memb_c_cdecl(&A::member_cdecl); // expected-error {{no matching function for call to 'cb_memb_c_cdecl'}}
cb_memb_c_cdecl(&A::member_thiscall); // expected-error {{no matching function for call to 'cb_memb_c_cdecl'}}
cb_memb_b_thiscall(&A::member_default);
cb_memb_b_thiscall(&A::member_cdecl); // expected-error {{no matching function for call to 'cb_memb_b_thiscall'}}
cb_memb_b_thiscall(&A::member_thiscall);
cb_memb_c_thiscall(&A::member_default); // expected-error {{no matching function for call to 'cb_memb_c_thiscall'}}
cb_memb_c_thiscall(&A::member_cdecl); // expected-error {{no matching function for call to 'cb_memb_c_thiscall'}}
cb_memb_c_thiscall(&A::member_thiscall); // expected-error {{no matching function for call to 'cb_memb_c_thiscall'}}
}
} // end namespace NonVariadic
#endif // !_M_X64
namespace Variadic {
struct A {
void member_default(int, ...);
void __cdecl member_cdecl(int, ...);
void __thiscall member_thiscall(int, ...);
#if !_M_X64
// expected-error@-2 {{variadic function cannot use thiscall calling convention}}
#endif
};
struct B : public A {
};
struct C {
void member_default(int, ...);
void __cdecl member_cdecl(int, ...);
};
typedef void ( A::*memb_a_default)(int, ...);
typedef void (__cdecl A::*memb_a_cdecl)(int, ...);
typedef void ( B::*memb_b_default)(int, ...);
typedef void (__cdecl B::*memb_b_cdecl)(int, ...);
typedef void ( C::*memb_c_default)(int, ...);
typedef void (__cdecl C::*memb_c_cdecl)(int, ...);
void cb_memb_a_default(memb_a_default ptr);
void cb_memb_a_cdecl(memb_a_cdecl ptr);
void cb_memb_b_default(memb_b_default ptr);
void cb_memb_b_cdecl(memb_b_cdecl ptr);
// expected-note@+2 {{candidate function not viable: no known conversion from 'void (Variadic::A::*)(int, ...)' to 'memb_c_default' (aka 'void (Variadic::C::*)(int, ...)') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void (Variadic::A::*)(int, ...) __attribute__((cdecl))' to 'memb_c_default' (aka 'void (Variadic::C::*)(int, ...)') for 1st argument}}
void cb_memb_c_default(memb_c_default ptr);
// expected-note@+2 {{candidate function not viable: no known conversion from 'void (Variadic::A::*)(int, ...)' to 'memb_c_cdecl' (aka 'void (Variadic::C::*)(int, ...) __attribute__((cdecl))') for 1st argument}}
// expected-note@+1 {{candidate function not viable: no known conversion from 'void (Variadic::A::*)(int, ...) __attribute__((cdecl))' to 'memb_c_cdecl' (aka 'void (Variadic::C::*)(int, ...) __attribute__((cdecl))') for 1st argument}}
void cb_memb_c_cdecl(memb_c_cdecl ptr);
void call_member() {
cb_memb_a_default(&A::member_default);
cb_memb_a_default(&A::member_cdecl);
cb_memb_a_cdecl(&A::member_default);
cb_memb_a_cdecl(&A::member_cdecl);
}
void call_member_inheritance() {
cb_memb_b_default(&A::member_default);
cb_memb_b_default(&A::member_cdecl);
cb_memb_c_default(&A::member_default); // expected-error {{no matching function for call to 'cb_memb_c_default'}}
cb_memb_c_default(&A::member_cdecl); // expected-error {{no matching function for call to 'cb_memb_c_default'}}
cb_memb_b_cdecl(&A::member_default);
cb_memb_b_cdecl(&A::member_cdecl);
cb_memb_c_cdecl(&A::member_default); // expected-error {{no matching function for call to 'cb_memb_c_cdecl'}}
cb_memb_c_cdecl(&A::member_cdecl); // expected-error {{no matching function for call to 'cb_memb_c_cdecl'}}
}
} // end namespace Variadic
namespace MultiChunkDecls {
// Try to test declarators that have multiple DeclaratorChunks.
struct A {
void __thiscall member_thiscall(int);
};
void (A::*return_mptr(short))(int) {
return &A::member_thiscall;
}
void (A::*(*return_fptr_mptr(char))(short))(int) {
return return_mptr;
}
typedef void (A::*mptr_t)(int);
mptr_t __stdcall return_mptr_std(short) {
return &A::member_thiscall;
}
void (A::*(*return_fptr_std_mptr(char))(short))(int) {
return return_mptr_std;
#if !_M_X64
// expected-error@-2 {{cannot initialize return object of type 'void (MultiChunkDecls::A::*(*)(short))(int) __attribute__((thiscall))' with an lvalue of type 'mptr_t (short) __attribute__((stdcall))'}}
#endif
}
void call_return() {
A o;
void (A::*(*fptr)(short))(int) = return_fptr_mptr('a');
void (A::*mptr)(int) = fptr(1);
(o.*mptr)(2);
}
} // end namespace MultiChunkDecls
namespace MemberPointers {
struct A {
void __thiscall method_thiscall();
void __cdecl method_cdecl();
void __stdcall method_stdcall();
void __fastcall method_fastcall();
};
void ( A::*mp1)() = &A::method_thiscall;
void (__cdecl A::*mp2)() = &A::method_cdecl;
void (__stdcall A::*mp3)() = &A::method_stdcall;
void (__fastcall A::*mp4)() = &A::method_fastcall;
// Use a typedef to form the member pointer and verify that cdecl is adjusted.
typedef void ( fun_default)();
typedef void (__cdecl fun_cdecl)();
typedef void (__stdcall fun_stdcall)();
typedef void (__fastcall fun_fastcall)();
fun_default A::*td1 = &A::method_thiscall;
fun_cdecl A::*td2 = &A::method_thiscall;
fun_stdcall A::*td3 = &A::method_stdcall;
fun_fastcall A::*td4 = &A::method_fastcall;
// Round trip the function type through a template, and verify that only cdecl
// gets adjusted.
template<typename Fn> struct X { typedef Fn A::*p; };
X<void ()>::p tmpl1 = &A::method_thiscall;
X<void __cdecl ()>::p tmpl2 = &A::method_thiscall;
X<void __stdcall ()>::p tmpl3 = &A::method_stdcall;
X<void __fastcall ()>::p tmpl4 = &A::method_fastcall;
X<fun_default >::p tmpl5 = &A::method_thiscall;
X<fun_cdecl >::p tmpl6 = &A::method_thiscall;
X<fun_stdcall >::p tmpl7 = &A::method_stdcall;
X<fun_fastcall>::p tmpl8 = &A::method_fastcall;
// Make sure we adjust thiscall to cdecl when extracting the function type from
// a member pointer.
template <typename> struct Y;
template <typename Fn, typename C>
struct Y<Fn C::*> {
typedef Fn *p;
};
void __cdecl f_cdecl();
Y<decltype(&A::method_thiscall)>::p tmpl9 = &f_cdecl;
} // end namespace MemberPointers
// Test that lambdas that capture nothing convert to cdecl function pointers.
namespace Lambdas {
void pass_fptr_cdecl (void (__cdecl *fp)());
void pass_fptr_stdcall (void (__stdcall *fp)());
void pass_fptr_fastcall(void (__fastcall *fp)());
void conversion_to_fptr() {
pass_fptr_cdecl ([]() { } );
pass_fptr_stdcall ([]() { } );
#if !_M_X64
// expected-error@-2 {{no matching function for call}}
// expected-note@-9 {{candidate function not viable}}
#endif
pass_fptr_fastcall([]() { } );
#if !_M_X64
// expected-error@-2 {{no matching function for call}}
// expected-note@-14 {{candidate function not viable}}
#endif
}
}
namespace D50526 {
template<typename T, T (__stdcall f)()> void g();
void h() { g<void, h>(); }
#if !_M_X64
// expected-error@-2 {{no matching function for call to}}
// expected-note@-4 {{invalid explicitly-specified argument}}
#endif
}
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