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b9ec68431b
A file scope declaration without an initializer which is neither extern nor thread_local is a tentative definition. If the declaration of an identifier for an object is a tentative definition and has internal linkage, the declared type shall not be an incomplete type. Clang was previously failing to diagnose this in -pedantic mode. Fixes #50661 --------- Co-authored-by: Mariya Podchishchaeva <mariya.podchishchaeva@intel.com>
51 lines
2.4 KiB
C
51 lines
2.4 KiB
C
// RUN: %clang_cc1 -fsyntax-only -verify=c,expected %s
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// RUN: %clang_cc1 -x c++ -fsyntax-only -verify=cxx,expected %s
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struct foo; // c-note 4 {{forward declaration of 'struct foo'}} \
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cxx-note 3 {{forward declaration of 'foo'}}
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void b; // expected-error {{variable has incomplete type 'void'}}
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struct foo f; // c-error {{tentative definition has type 'struct foo' that is never completed}} \
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cxx-error {{variable has incomplete type 'struct foo'}}
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static void c; // expected-error {{variable has incomplete type 'void'}}
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static struct foo g; // c-error {{tentative definition has type 'struct foo' that is never completed}} \
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cxx-error {{variable has incomplete type 'struct foo'}}
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extern void d; // cxx-error {{variable has incomplete type 'void'}}
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extern struct foo e;
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int ary[]; // c-warning {{tentative array definition assumed to have one element}} \
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cxx-error {{definition of variable with array type needs an explicit size or an initializer}}
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struct foo bary[]; // c-error {{array has incomplete element type 'struct foo'}} \
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cxx-error {{definition of variable with array type needs an explicit size or an initializer}}
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void func(void) {
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int ary[]; // expected-error {{definition of variable with array type needs an explicit size or an initializer}}
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void b; // expected-error {{variable has incomplete type 'void'}}
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struct foo f; // expected-error {{variable has incomplete type 'struct foo'}}
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}
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int h[]; // c-warning {{tentative array definition assumed to have one element}} \
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cxx-error {{definition of variable with array type needs an explicit size or an initializer}}
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int (*i)[] = &h+1; // c-error {{arithmetic on a pointer to an incomplete type 'int[]'}}
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struct bar j = {1}; // expected-error {{variable has incomplete type 'struct bar'}} \
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c-note {{forward declaration of 'struct bar'}} \
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cxx-note 2 {{forward declaration of 'bar'}}
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struct bar k; // cxx-error {{variable has incomplete type 'struct bar'}}
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struct bar { int a; };
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struct x y; //c-note 2 {{forward declaration of 'struct x'}} \
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cxx-error {{variable has incomplete type 'struct x'}} \
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cxx-note {{forward declaration of 'x'}}
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void foo() {
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(void)(1 ? y : y); // c-error 2 {{incomplete type 'struct x' where a complete type is required}}
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}
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struct x{
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int a;
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};
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