Flexible array members of structures
To be compatible with GNU C/C++, the XL C/C++ compiler
extends Standard C and C++, to ease the restrictions
on flexible array members and allow the following situations:
- Structures containing flexible array members can be members of other structures.
Flexible array members can be statically initialized
only if either of the following two conditions is true:- The flexible array member is the last member of the structure,
for example:
struct f { int a; int b[]; } f1 = {1,{1,2,3}}; // Fine. struct a { int b; int c[]; int d[]; } e = { 1,{1,2},3}; // Error, c is not the last member // of structure a. - Flexible array members are contained in the outermost structure
of nested structures. Members of inner structures cannot be statically
initialized, for example:
struct b { int c; int d[]; }; struct c { struct b f; int g[]; } h ={{1,{1,2}},{1,2}}; // Error, member d of structure b is // in the inner nested structure.
- The flexible array member is the last member of the structure,
for example:
