Compilation error "has no member named" for a union member

Question

I see this compilation error "has no member named" for some of the union elements.

snmp_xmas.c:129: error: 'xmas_datatype_value_t' has no member named 'int8'
snmp_xmas.c:132: error: 'xmas_datatype_value_t' has no member named 'int16'

I dont see any issue with the member definion. The union definion is as follows.

typedef union {
/**
 * Value for XMAS_ITEM_DATATYPE_BITS
 */
xmas_datatype_bits_t         bits;
/**
 * Value for XMAS_ITEM_DATATYPE_BOOL
 */
xmas_datatype_bool_t boolean;
/**
* Value for XMAS_ITEM_DATATYPE_CERRNO
 */
xmas_datatype_cerrno_t       cerrno;
/**
 * Value for XMAS_ITEM_DATATYPE_DATETIME
 */
xmas_datatype_datetime_t     datetime;
/**
 * Value for XMAS_ITEM_DATATYPE_EMPTY
 */
xmas_datatype_empty_t        empty;
/**
 * Value for XMAS_ITEM_DATATYPE_ENUM
 */
xmas_datatype_enum_t enumeration;
/**
 * Value for XMAS_ITEM_DATATYPE_IDENTITYREF
 */
xmas_datatype_identityref_t  identityref;
/**
 * Value for XMAS_ITEM_DATATYPE_INT16
 */
xmas_datatype_int16_t        int16;
/**
* Value for XMAS_ITEM_DATATYPE_INT32
*/
xmas_datatype_int32_t        int32;
/**
 * Value for XMAS_ITEM_DATATYPE_INT64
 */
xmas_datatype_int64_t        int64;
/**
 * Value for XMAS_ITEM_DATATYPE_INT8
 */
xmas_datatype_int8_t         int8;
/**
 * Value for XMAS_ITEM_DATATYPE_INTF
 */
xmas_datatype_intf_t        *intf;
/**
 * Value for XMAS_ITEM_DATATYPE_IPV4_ADDR
 */
xmas_datatype_ipv4_addr_t    ipv4_addr;
/**
 * Value for XMAS_ITEM_DATATYPE_IPV6_ADDR
 */
xmas_datatype_ipv6_addr_t   *ipv6_addr;
/**
 * Value for XMAS_ITEM_DATATYPE_IP_ADDR
 */
xmas_datatype_ip_addr_t     *ip_addr;
/**
} xmas_datatype_value_t;

All the xmas datatypes are defined in a single header file and is included in my .c file which refers the union members. The code snippet is pasted below.

cerrno
xmibd_convert_xmas_to_XXX(xmas_item_datatype_t    *xmas_datatype,
                       xmas_datatype_value_t   *xmas_value,
                       struct sa_do_value     **ret_value)
{
:
:
:

switch (*xmas_datatype) {
    case XMAS_ITEM_DATATYPE_BITS:
        out_value = sa_do_value_new_unsigned_long(xmas_value->bits);
        break;
    case XMAS_ITEM_DATATYPE_BOOL:
        out_value = sa_do_value_new_boolean(xmas_value->boolean);
        break;
    case XMAS_ITEM_DATATYPE_CERRNO:
        out_value = sa_do_value_new_unsigned_int(xmas_value->cerrno);
        break;
    case XMAS_ITEM_DATATYPE_EMPTY:
        out_value = sa_do_value_new_boolean(xmas_value->empty);
        break;
    case XMAS_ITEM_DATATYPE_DATETIME:
        out_value = sa_do_value_new_datetime(xmas_value->datetime);
        break;         
    case XMAS_ITEM_DATATYPE_INT8:
         out_value = sa_do_value_new_byte(xmas_value->int8);
         break;
     case XMAS_ITEM_DATATYPE_INT16:
         out_value = sa_do_value_new_short(xmas_value->int16);
         break;
:
:
}

Any pointers to the possible issue would be highly appreciated. Thanks,

You probably also have code elsewhere that does `#define int8` something. Try `#ifdef int8` followed by `#error aha`, in the header — M.M, Apr 28 '14 at 05:44
Alternatively, look up how `xmas_datatype_int8_t` is defined — M.M, Apr 28 '14 at 05:46
Please show the actual code you compile, not the extract. Your `typedef` shown won't compile because it doesn't end with a semicolon after the close brace, and there isn't a name there either. So, either you chopped off some crucial information or you're actually using something else. I'd be leery of using names like `int8` and `int16` as members; there's too much risk (in my book, based on experience) of there being data types of those names. (One of the systems I worked on had a set of data types like `int1`, `int2`, `int4` and … well, it ran into problems with `int8` — 8 bytes or 8 bits?) — Jonathan Leffler, Apr 28 '14 at 06:44
int8 and uint8 etc were very commonly used typedefs in C, before C99 standardized them to be called int8_t and uint8_t. — Lundin, Apr 28 '14 at 06:46
Even StackOverflow parser highlights your `int8` and `int16` members as types. Are you sure there is no other name you can use for those members ? — Dabo, Apr 28 '14 at 06:52
I tried renameing int8 to int8_temp etc. But the same error is coming. so, it doesnt seem to be related to the variable name. — Abhi V, Apr 28 '14 at 07:02

score 0 · Answer 1 · answered Apr 28 '14 at 10:00

0

The issue was related to a duplicate obsolete path for the header file mentioned in the Makefile. It was referring to the wrong path, so obviously my changes weren't getting affected.

answered Apr 28 '14 at 10:00

Abhi V

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Compilation error "has no member named" for a union member

1 Answers1