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      1 // RUN: %clang_cc1 -fsyntax-only -pedantic -verify %s
      2 struct one {
      3   int a;
      4   int values[]; // expected-note 4{{initialized flexible array member 'values' is here}}
      5 } x = {5, {1, 2, 3}}; // expected-warning{{flexible array initialization is a GNU extension}}
      6 
      7 struct one x2 = { 5, 1, 2, 3 }; // expected-warning{{flexible array initialization is a GNU extension}}
      8 
      9 void test() {
     10   struct one x3 = {5, {1, 2, 3}}; // \
     11    // expected-warning{{flexible array initialization is a GNU extension}} \
     12    // expected-error {{non-static initialization of a variable with flexible array member}}
     13   struct one x3a = { 5 };
     14   struct one x3b = { .a = 5 };
     15   struct one x3c = { 5, {} }; // expected-warning{{use of GNU empty initializer extension}} \
     16   // expected-warning{{flexible array initialization is a GNU extension}} \
     17   // expected-warning{{zero size arrays are an extension}}
     18 }
     19 
     20 struct foo {
     21   int x;
     22   int y[]; // expected-note 6 {{initialized flexible array member 'y' is here}}
     23 };
     24 struct bar { struct foo z; }; // expected-warning {{'z' may not be nested in a struct due to flexible array member}}
     25 
     26 struct foo a = { 1, { 2, 3, 4 } };        // expected-warning{{flexible array initialization is a GNU extension}}
     27 struct bar b = { { 1, { 2, 3, 4 } } };    // expected-error{{non-empty initialization of flexible array member inside subobject}}
     28 struct bar c = { { 1, { } } };            // // expected-warning{{flexible array initialization is a GNU extension}} \
     29               // expected-warning{{use of GNU empty initializer extension}} \
     30               // expected-warning{{zero size arrays are an extension}}
     31 struct foo d[1] = { { 1, { 2, 3, 4 } } };  // expected-warning{{'struct foo' may not be used as an array element due to flexible array member}} \
     32               // expected-error{{non-empty initialization of flexible array member inside subobject}}
     33 
     34 struct foo desig_foo = { .y = {2, 3, 4} };
     35 struct bar desig_bar = { .z.y = { } }; // expected-warning{{use of GNU empty initializer extension}} \
     36   // expected-warning{{zero size arrays are an extension}}
     37 struct bar desig_bar2 = { .z.y = { 2, 3, 4} }; // expected-error{{non-empty initialization of flexible array member inside subobject}}
     38 struct foo design_foo2 = { .y = 2 }; // expected-error{{flexible array requires brace-enclosed initializer}}
     39 
     40 struct point {
     41   int x, y;
     42 };
     43 
     44 struct polygon {
     45   int numpoints;
     46   struct point points[]; // expected-note{{initialized flexible array member 'points' is here}}
     47 };
     48 struct polygon poly = {
     49   .points[2] = { 1, 2} }; // expected-error{{designator into flexible array member subobject}}
     50 
     51 // PR3540
     52 struct X {
     53   int a;
     54   int b;
     55   char data[];
     56 };
     57 
     58 struct Y {
     59   int a:4;
     60   int b:4;
     61   int c;
     62   int d;
     63   int e;
     64   struct X xs[]; // expected-warning{{'struct X' may not be used as an array element due to flexible array member}}
     65 };
     66 
     67 
     68 // PR8217
     69 struct PR8217a {
     70   int  i;
     71   char v[];
     72 };
     73 
     74 void PR8217() {
     75   struct PR8217a foo1 = { .i = 0, .v = "foo" }; // expected-error {{non-static initialization of a variable with flexible array member}}
     76   struct PR8217a foo2 = { .i = 0 };
     77   struct PR8217a foo3 = { .i = 0, .v = { 'b', 'a', 'r', '\0' } }; // expected-error {{non-static initialization of a variable with flexible array member}}
     78   struct PR8217a bar;
     79 }
     80 
     81