92 lines · c
1// RUN: %clang_cc1 -fsyntax-only -pedantic -verify %s2struct 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 7struct one x2 = { 5, 1, 2, 3 }; // expected-warning{{flexible array initialization is a GNU extension}}8 9void test(void) {10 struct one x3 = {5, {1, 2, 3}}; // expected-error{{initialization of flexible array member is not allowed}}11 struct one x3a = { 5 };12 struct one x3b = { .a = 5 };13 struct one x3c = { 5, {} }; // expected-warning{{use of an empty initializer is a C23 extension}} \14 // expected-warning{{flexible array initialization is a GNU extension}} \15 // expected-warning{{zero size arrays are an extension}}16}17 18struct foo { 19 int x; 20 int y[]; // expected-note 8 {{initialized flexible array member 'y' is here}}21}; 22struct bar { struct foo z; }; // expected-warning {{'z' may not be nested in a struct due to flexible array member}}23 24struct foo a = { 1, { 2, 3, 4 } }; // expected-warning{{flexible array initialization is a GNU extension}}25struct bar b = { { 1, { 2, 3, 4 } } }; // expected-error{{initialization of flexible array member is not allowed}}26struct bar c = { { 1, { } } }; // // expected-warning{{flexible array initialization is a GNU extension}} \27 // expected-warning{{use of an empty initializer is a C23 extension}} \28 // expected-warning{{zero size arrays are an extension}}29struct foo d[1] = { { 1, { 2, 3, 4 } } }; // expected-warning{{'struct foo' may not be used as an array element due to flexible array member}} \30 // expected-error{{initialization of flexible array member is not allowed}}31 32struct foo desig_foo = { .y = {2, 3, 4} }; // expected-warning{{flexible array initialization is a GNU extension}}33struct bar desig_bar = { .z.y = { } }; // expected-warning{{use of an empty initializer is a C23 extension}} \34 // expected-warning{{zero size arrays are an extension}} \35 // expected-warning{{flexible array initialization is a GNU extension}}36struct bar desig_bar2 = { .z.y = { 2, 3, 4} }; // expected-error{{initialization of flexible array member is not allowed}}37struct foo design_foo2 = { .y = 2 }; // expected-error{{flexible array requires brace-enclosed initializer}}38 39struct point {40 int x, y;41};42 43struct polygon {44 int numpoints;45 struct point points[]; // expected-note{{initialized flexible array member 'points' is here}}46};47struct polygon poly = { 48 .points[2] = { 1, 2} }; // expected-error{{designator into flexible array member subobject}}49 50// PR354051struct X {52 int a;53 int b;54 char data[];55};56 57struct Y {58 int a:4;59 int b:4;60 int c;61 int d;62 int e;63 struct X xs[]; // expected-warning{{'struct X' may not be used as an array element due to flexible array member}}64};65 66 67// PR821768struct PR8217a {69 int i;70 char v[]; // expected-note 2 {{initialized flexible array member 'v' is here}}71};72 73void PR8217(void) {74 struct PR8217a foo1 = { .i = 0, .v = "foo" }; // expected-error {{initialization of flexible array member is not allowed}}75 struct PR8217a foo2 = { .i = 0 };76 struct PR8217a foo3 = { .i = 0, .v = { 'b', 'a', 'r', '\0' } }; // expected-error {{initialization of flexible array member is not allowed}}77 struct PR8217a bar;78}79 80typedef struct PR10648 {81 unsigned long n;82 int v[]; // expected-note {{initialized flexible array member 'v' is here}}83} PR10648;84int f10648(void) { 85 return (PR10648){2, {3, 4}}.v[1]; // expected-error {{initialization of flexible array member is not allowed}}86}87 88struct FlexWithUnnamedBitfield { int : 10; int x; int y[]; }; // expected-note {{initialized flexible array member 'y' is here}}89void TestFlexWithUnnamedBitfield(void) {90 struct FlexWithUnnamedBitfield x = {10, {3}}; // expected-error {{initialization of flexible array member is not allowed}}91}92