VDM-10 Language Manual

Appendix A. The Syntax of the VDM Languages
A.9.5
A.9.6
The Nondeterministic Statement
nondeterministic statement = ‘||’, ‘(’, statement,
{ ‘,’, statement }, ‘)’ ;
Call and Return Statements
In VDM-SL a call statement looks like:
call statement = name, ‘(’,
[ expression list ], ‘)’ ;
In VDM++ and VDM-RT a call statement looks like:
A.9.7
A.9.8
A.9.9
call statement = [ object designator, ‘.’ ],
name, ‘(’, [ expression list ], ‘)’, ;
object designator = name
| self expression
| new expression
| object field reference
| object apply ;
object field reference = object designator, ‘.’, identifier ;
object apply = object designator, ‘(’, [ expression list ], ‘)’ ;
return statement = ‘return’, [ expression ] ;
The Specification Statement
specification statement = ‘[’, implicit operation body, ‘]’ ;
Start and Start List Statements (VDM++ and VDM-RT)
start statement = ‘start’, ‘(’, expression, ‘)’ ;
start list statement = ‘startlist’, ‘(’, expression, ‘)’ ;
The Duration and Cycles Statements (VDM-RT)
duration statement = ‘duration’, ‘(’, numeric literal, ‘)’,
statement ;
cycles statement = ‘cycles’, ‘(’, numeral, ‘)’,
statement ;
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