Question related to enum

[g_p]

Hi to all!

I'm confused as far as "enum" is concerned!

typedef struct TableRecord {

union {
variable* var;
function* fun;
} t;
enum symbolType;  /* What does enum do here with the variable symbolType??? */

} TableRecord;

Thanks in advance

[dwks]

It doesn't do anything, or perhaps it's a forward declaration for the enum symbolType.

Perhaps it would help if you knew what an enum was: http://www.cprogramming.com/tutorial/enum.html

enums have much the same syntax as structs and unions. An enum has the basic form

enum tag {
    data
} variable;

If the tag is present, it declares the enum as a type, but it doesn't actually create a variable. If the variable nam is present, an instance of the enu is declared, but you can't reference the enum type anywhere else because it doesn't have a tag. Both the tag and the variable can be present. (You can get anonymous enums, too, with neither a tag nor a variable name.) And you can have multiple variable names, just like structures.

The data in the enum is a list of names, with this basic form:

enum { value1, value2, valueN } ;

The first is assigned zero, unless you change it:

enum {
    two = 2,
    three
};

Succeeding values are one greater than the previous value, unless they are also assigned a value.

enum {
    negative = -1,
    positive = 1
};