Syntax Notes

This section describes the XDR language syntax.

The following considerations pertain to XDR language syntax:

• The following keywords cannot be used as identifiers:
  • bool
  • case
  • const
  • default
  • double
  • enum
  • float
  • hyper
  • opaque
  • string
  • struct
  • switch
  • typedef
  • union
  • unsigned
  • void
• Only unsigned constants can be used as size specifications for arrays. If an identifier is used, it must be declared previously as an unsigned constant in a const definition.
• In the scope of a specification, constant and type identifiers are in the same name space and must be declared uniquely.
• Variable names must be unique in the scope of struct and union declarations. Nested struct and union declarations create new scopes.