In Itanium
An identifier may contain letters, digits, and a few special characters. Identifiers may not begin with a digit.
The following table summarizes the rules for character usage in identifiers.
Character Types |
First Characters |
Remaining Characters |
Letters |
a-z or A-Z |
a-z or A-Z |
Special Characters |
@ _ $ ? . |
@ _ $ ? . |
Digits |
not allowed |
0-9 |
The assembler may place a limit on the length of an identifier, but this limit must be no less than 256 characters.