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// { dg-do compile }
// { dg-options "-Wno-error=pedantic" }
// Test to verify flexible array members handling in base and derived
// classes.
#include "flexary.h"
template <class T>
struct S_no_diag: T {
char a[]; // cannot be diagnosed unless/until T is known
};
template <class T>
struct STx_1: T {
char a[]; // { dg-error "flexible array member" }
};
template <class T, int I>
struct STI: T {
char a[I]; // cannot be diagnosed unless/until T and I are known
};
template <class T, int I>
struct STIx: T {
char a[I];
};
template <int> struct E { };
STx_1<E<0> > stx_empty_1;
STIx<E<0>, 0> stix_empty_1;
// Verify that a sole flexible array member in a class with all empty
// base classes is diagnosed.
struct E1: E<0>, E<1> { };
struct E2: E<2>, E<3> { };
struct D1: E1, E2
{
char a[]; // { dg-error "flexible array member" }
};
struct NE { size_t i; };
struct A1x { int n, a[]; };
struct D2: A1x, E1, E2 { };
// Verify that the offset of the flexible array member is equal
// to the size of each of the valid structs.
ASSERT_AT_END (D2, a);
struct D3: E1, A1x, E2 { };
ASSERT_AT_END (D3, a);
struct D4: E1, E2, A1x { };
ASSERT_AT_END (D4, a);
// Class with non-static data members and at least one base class
// with such a member is not a standard layout class. The warning
// below is benign since GCC computes the expected value.
struct D5: E1, E2, NE { char a[]; };
ASSERT_AT_END (D5, a); // { dg-warning "offsetof within non-standard-layout" }
struct A2x {
size_t n;
size_t a[]; // { dg-error "not at end of .struct D6.| D7.| D8." }
};
// Verify that the flexible array member in A2x above is diagnosed
// for each of the three struct defintions below which also derive
// from another struct with a flexible array member.
struct D6: A2x, E1, A1x { };
struct D7: E1, A2x, E2, A1x { };
struct D8: E1, E2, A2x, A1x { };
struct DA2x: A2x { };
struct D9: DA2x, E1, E2 { };
ASSERT_AT_END (D9, a);
struct D10: E1, DA2x, E2 { };
ASSERT_AT_END (D10, a);
struct D11: E1, E2, DA2x { };
ASSERT_AT_END (D11, a);
struct A3x {
size_t n;
size_t a[]; // { dg-error "not at end of .struct D12.| D13.| D14.| D15." }
};
// Verify that the flexible array member in A3x above is diagnosed
// for each of the three struct defintions below which also derive
// from another struct with a non-static member.
struct D12: A3x, E1, NE { };
struct D13: E1, A3x, NE { };
struct D14: E1, E2, A3x, NE { };
struct D15: E1, E2, NE, A3x { };
struct A4x {
A4x ();
~A4x ();
size_t n;
struct AS {
AS (int);
~AS ();
size_t i;
} a[];
};
struct D16: A4x, E1, E2 { };
ASSERT_AT_END (D16, a);
struct D17: E1, A4x, E2 { };
ASSERT_AT_END (D17, a);
struct D18: E1, E2, A4x { };
ASSERT_AT_END (D18, a);
struct DA4x: A4x { };
struct D19: DA4x, E1, E2 { };
ASSERT_AT_END (D19, a);
struct D20: E1, DA4x, E2 { };
ASSERT_AT_END (D20, a);
struct D21: E1, E2, DA4x { };
ASSERT_AT_END (D21, a);
struct A5x {
A5x (int);
virtual ~A5x ();
size_t n;
struct AS {
AS (int);
~AS ();
size_t i;
} a[];
};
struct D22: A5x, E1, E2 { };
ASSERT_AT_END (D22, a); // { dg-warning "offsetof within non-standard-layout" }
struct D23: E1, A5x, E2 { };
ASSERT_AT_END (D23, a); // { dg-warning "offsetof within non-standard-layout" }
struct D24: E1, E2, A5x { };
ASSERT_AT_END (D24, a); // { dg-warning "offsetof within non-standard-layout" }
struct DA5x: A5x { };
struct D25: DA5x, E1, E2 { };
ASSERT_AT_END (D25, a); // { dg-warning "offsetof within non-standard-layout" }
struct D26: E1, DA5x, E2 { };
ASSERT_AT_END (D26, a); // { dg-warning "offsetof within non-standard-layout" }
struct D27: E1, E2, DA5x { };
ASSERT_AT_END (D27, a); // { dg-warning "offsetof within non-standard-layout" }
// Verfify that a flexible array member is diagnosed even when deep
// in the base class hierarchy.
struct A6x {
size_t n;
size_t a[]; // { dg-error "not at end of .struct D28.| D29." }
};
struct AA6x: A6x { };
struct NE1: NE { };
struct NE2: NE { };
struct D28: NE1, AA6x { };
struct D29: AA6x, NE1 { };
// Verify that a flexible array member in a virtual base class is not
// diagnosed.
struct A7x {
size_t n;
size_t a[];
};
struct DA7xV1: virtual A7x { };
struct DA7xV2: virtual A7x { };
struct D30: DA7xV1, DA7xV2 { };
struct D31: DA7xV1, DA7xV2 { };
struct D32: D30, D31 { };
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