Anyone can help me declaration data structures?

I am writing an ATLAS Interpreter. It has Pascal like declarations.
kind of like:


DECLARE, VARIABLE 'PATTERN' IS RECORD OF
          [ 'PART1' IS STRING OF CHAR; 'PART2' IS INTEGER] $


DECLARE, VARIABLE 'PAT-ARRAY' IS ARRAY (1 THRU 3, 2 THRU 8) OF
                                RECORD OF ['AA' IS INTEGER;'BB' IS CHAR]
                                      INITIAL = (3 OF ( 7 OF (1,C'A'))) $


  The question I have is , does anyone know any interpreters I can
    look at that creates data structures for this kind of definitions
(C++ and Abstract class types are preferred).Also I am using
Lex and Yacc.


Thanx


Sinan
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