VDM-10 Language Manual

VDM-10 Language Manual
A.7.25
History Expressions (VDM++ and VDM-RT)
act expression = ‘#act’, ‘(’, name, ‘)’
| ‘#act’, ‘(’, name list, ‘)’ ;
fin expression = ‘#fin’, ‘(’, name, ‘)’
| ‘#fin’, ‘(’, name list, ‘)’ ;
active expression = ‘#active’, ‘(’, name, ‘)’
| ‘#active’, ‘(’, name list, ‘)’ ;
req expression = ‘#req’, ‘(’, name, ‘)’
| ‘#req’, ‘(’, name list, ‘)’ ;
waiting expression = ‘#waiting’, ‘(’, name, ‘)’
| ‘#waiting’, ‘(’, name list, ‘)’ ;
A.7.26
Time Expressions (VDM-RT)
time expression = ‘time’ ;
A.7.27
Names
name = identifier, [ ‘‘’, identifier ] ;
name list = name, { ‘,’, name } ;
old name = identifier, ‘˜’ ;
A.8 State Designators
state designator = name
| field reference
| map or sequence reference ;
field reference = state designator, ‘.’, identifier ;
map or sequence reference = state designator, ‘(’, expression, ‘)’ ;
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