Create Type Problem

Hi
I am newbe so this problem may be too simple to be asked.please help me if
any new thing to be added in following:
I created data type IndChar The c functions are:
typedef struct IndChar
{
int32 len;
char c_in_str[1];
}IndChar;
then i defined input & output functions.
Input: Datum indcharin(PG_FUNCTION_ARGS);
Output: Datum indcharout(PG_FUNCTION_ARGS);
then i created a function of the same name(i.e. IndChar) as
Datum indchar(PG_FUNCTION_ARGS);//for applying indchar(n) form i.e.fixed length
and i created it using:
create function indchar(IndChar, integer) returns IndChar
language C as 'Path for indchar.so file'
immutable strict;
after these i created data type using:
create type indchar
(input = indcharin,
output = indcharout,
internallength = variable,
storage = extended);
the type is created...
when i use it in create table temp
(name IndChar(20));
it gives error at character '( '.....
please tell me why it is giving such error...
if some steps needed to alter or add tell me...
thanx in advance
Vinay jain

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