Re: Length limit for variable names in your language?

[Cesar Rabak <csrabak@uol.com.br>]

Edward Rosten wrote:
> 
> > What this limit is for C++,Fortran,Lisp,Pascal etcetcetc ?
> 
> According to K&R 2nd edition, C guarntees that at least the first 31
> characters of an internal name are significant. The standard guarntees 6
> monocase characters for external identifiers, minimum.
> 
> -Ed

The present standard (a.k.a. C99) changes this to:

         -- 63  significant  initial  characters  in  an   internal
            identifier  or  a  macro name (each universal character
            name or  extended  source  character  is  considered  a
            single character)

         -- 31   significant  initial  characters  in  an  external
            identifier (each universal character name specifying  a
            character  short  identifier  of  0000FFFF  or  less is
            considered 6 characters, each universal character  name
            specifying  a character short identifier of 00010000 or
            more is considered 10  characters,  and  each  extended
            source  character  is  considered  the  same  number of
            characters as  the  corresponding  universal  character
            name, if any)

Since presently no C compiler is 100% compliant to the standard, YMMV.

HTH

Cesar