test/Sema/flexible-array-init.c

   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