| 1 | // RUN: %clang_cc1 -fsyntax-only -pedantic -verify %s |
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| 2 | |
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| 3 | // Simple form |
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| 4 | int ar1[10]; |
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| 5 | |
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| 6 | // Element type cannot be: |
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| 7 | // - (cv) void |
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| 8 | volatile void ar2[10]; // expected-error {{incomplete element type 'volatile void'}} |
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| 9 | // - a reference |
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| 10 | int& ar3[10]; // expected-error {{array of references}} |
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| 11 | // - a function type |
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| 12 | typedef void Fn(); |
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| 13 | Fn ar4[10]; // expected-error {{array of functions}} |
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| 14 | // - an abstract class |
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| 15 | struct Abstract { virtual void fn() = 0; }; // expected-note {{pure virtual}} |
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| 16 | Abstract ar5[10]; // expected-error {{abstract class}} |
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| 17 | |
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| 18 | // If we have a size, it must be greater than zero. |
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| 19 | int ar6[-1]; // expected-error {{array with a negative size}} |
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| 20 | int ar7[0u]; // expected-warning {{zero size arrays are an extension}} |
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| 21 | |
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| 22 | // An array with unknown bound is incomplete. |
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| 23 | int ar8[]; // expected-error {{needs an explicit size or an initializer}} |
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| 24 | // So is an array with an incomplete element type. |
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| 25 | struct Incomplete; // expected-note {{forward declaration}} |
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| 26 | Incomplete ar9[10]; // expected-error {{incomplete type}} |
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| 27 | // Neither of which should be a problem in situations where no complete type |
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| 28 | // is required. (PR5048) |
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| 29 | void fun(int p1[], Incomplete p2[10]); |
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| 30 | extern int ear1[]; |
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| 31 | extern Incomplete ear2[10]; |
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| 32 | |
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| 33 | // cv migrates to element type |
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| 34 | typedef const int cint; |
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| 35 | extern cint car1[10]; |
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| 36 | typedef int intar[10]; |
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| 37 | // thus this is a valid redeclaration |
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| 38 | extern const intar car1; |
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| 39 | |
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| 40 | // Check that instantiation works properly when the element type is a template. |
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| 41 | template <typename T> struct S { |
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| 42 | typename T::type x; // expected-error {{has no members}} |
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| 43 | }; |
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| 44 | S<int> ar10[10]; // expected-note {{requested here}} |
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| 45 | |
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| 46 | // Ensure that negative array size errors include the name of the declared |
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| 47 | // array as this is often used to simulate static_assert with template |
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| 48 | // instantiations, placing the 'error message' in the declarator name. |
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| 49 | int |
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| 50 | user_error_message |
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| 51 | [-1]; // expected-error {{user_error_message}} |
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| 52 | typedef int |
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| 53 | another_user_error_message |
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| 54 | [-1]; // expected-error {{another_user_error_message}} |
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| 55 | |
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