llvm-project/clang/test/SemaCXX/incomplete-call.cpp

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// RUN: %clang_cc1 -fsyntax-only -verify %s
struct A; // expected-note 15 {{forward declaration of 'A'}}
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A f(); // expected-note {{'f' declared here}}
template <typename T> A ft(T); // expected-note {{'ft' declared here}}
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struct B {
A f(); // expected-note {{'f' declared here}}
A operator()(); // expected-note 2 {{'operator()' declared here}}
operator A(); // expected-note {{'operator A' declared here}}
A operator!(); // expected-note 2 {{'operator!' declared here}}
A operator++(int); // expected-note {{'operator++' declared here}}
A operator[](int); // expected-note {{'operator[]' declared here}}
A operator+(int); // expected-note {{'operator+' declared here}}
A operator->(); // expected-note {{'operator->' declared here}}
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};
void g() {
f(); // expected-error {{calling 'f' with incomplete return type 'A'}}
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typedef A (*Func)();
Func fp;
fp(); // expected-error {{calling function with incomplete return type 'A'}}
((Func)0)(); // expected-error {{calling function with incomplete return type 'A'}}
B b;
b.f(); // expected-error {{calling 'f' with incomplete return type 'A'}}
b.operator()(); // expected-error {{calling 'operator()' with incomplete return type 'A'}}
b.operator A(); // expected-error {{calling 'operator A' with incomplete return type 'A'}}
b.operator!(); // expected-error {{calling 'operator!' with incomplete return type 'A'}}
!b; // expected-error {{calling 'operator!' with incomplete return type 'A'}}
b(); // expected-error {{calling 'operator()' with incomplete return type 'A'}}
b++; // expected-error {{calling 'operator++' with incomplete return type 'A'}}
b[0]; // expected-error {{calling 'operator[]' with incomplete return type 'A'}}
b + 1; // expected-error {{calling 'operator+' with incomplete return type 'A'}}
b->f(); // expected-error {{calling 'operator->' with incomplete return type 'A'}}
A (B::*mfp)() = 0;
(b.*mfp)(); // expected-error {{calling function with incomplete return type 'A'}}
[clang] Pass the NamedDecl* instead of the DeclarationName into many diagnostics. Background: ----------- There are two related argument types which can be sent into a diagnostic to display the name of an entity: DeclarationName (ak_declarationname) or NamedDecl* (ak_nameddecl) (there is also ak_identifierinfo for IdentifierInfo*, but we are not concerned with it here). A DeclarationName in a diagnostic will just be streamed to the output, which will directly result in a call to DeclarationName::print. A NamedDecl* in a diagnostic will also ultimately result in a call to DeclarationName::print, but with two customisation points along the way: The first customisation point is NamedDecl::getNameForDiagnostic which is overloaded by FunctionDecl, ClassTemplateSpecializationDecl and VarTemplateSpecializationDecl to print the template arguments, if any. The second customisation point is NamedDecl::printName. By default it just streams the stored DeclarationName into the output but it can be customised to provide a user-friendly name for an entity. It is currently overloaded by DecompositionDecl and MSGuidDecl. What this patch does: --------------------- For many diagnostics a DeclarationName is used instead of the NamedDecl*. This bypasses the two customisation points mentioned above. This patches fix this for diagnostics in Sema.cpp, SemaCast.cpp, SemaChecking.cpp, SemaDecl.cpp, SemaDeclAttr.cpp, SemaDecl.cpp, SemaOverload.cpp and SemaStmt.cpp. I have only modified diagnostics where I could construct a test-case which demonstrates that the change is appropriate (either with this patch or the next one). Reviewed By: erichkeane, aaron.ballman Differential Revision: https://reviews.llvm.org/D84656
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ft(42); // expected-error {{calling 'ft<int>' with incomplete return type 'A'}}
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}
struct C; // expected-note{{forward declaration}}
void test_incomplete_object_call(C& c) {
c(); // expected-error{{incomplete type in call to object of type}}
}
void test_incomplete_object_dtor(C *p) {
p.~C(); // expected-error{{member reference type 'C *' is a pointer; did you mean to use '->'?}}
}
namespace pr18542 {
struct X {
int count;
template<typename CharT> class basic_istream;
template<typename CharT>
void basic_istream<CharT>::read() { // expected-error{{out-of-line definition of 'read' from class 'basic_istream<CharT>' without definition}}
count = 0;
}
};
}