Size of anonymous struct standard conformant?

Question

In C89 and C99: Is sizeof on anonymous structs standard conformant?

sizeof(struct{long l; void* ptr;})

Answer 1

The expression sizeof(struct{long l; void* ptr;}) is syntactically valid in all versions of the C standard. Syntactically, sizeof(struct{long; void *ptr;}) conforms to sizeof ( type-name ). A type name is syntactically a declaration of a function or an object of that type that omits the identifier.