Expression
(AbsTime) defining the time of the value occurrence (optional
parameter).
Description
The time of a value created by an assignment
is the current time. If the parameter
TIME
is
defined, then the value of the parameter timeExpression
will be used for the time of when the value is generated.
dstIdent is the identifier of one value of:
object or local variable of INT, BOOL, REAL, TIME
and TEXT types.
The parameter expression must be given
type. If not, the script will attempt to convert the value into the
correct type. If it is not successful, then the result value will be invalid.
local variable of RECORD type or object of Structured variable
type.
You can carry out an assignment just to one item of the particular structure
row. Other assignment rules are compliant with simple type.
RECORD (SD.RecordDef) _lArr
REDIM _lArr[10]
_lArr[2]^Int := 1
local variable of ALIAS type (untyped).
If it is not assigned to a D2000 system object, the error
_ERR_NO_ASSIGNED_ALIAS will occur. Otherwise, the expression is
evaluated and the result value is assigned to the object with the local variable
assigned.
ALIAS _a
SET _a AS U.Int
_a := 1
WAIT
local variable of ALIAS type (typed)
You can carry out an assignment just to one item of the particular structure
row. If the local variable is not linked to an D2000 system object, the
error _ERR_NO_ASSIGNED_ALIAS will occur. Otherwise, the expression is
evaluated and the result value is assigned to the object item.
ALIAS (SD.RecordDef) _aArr
SET _aArr AS SV.Structure
_aArr[2]^Int := 1
WAIT
Note
If an assignment changes the value of a D2000 system object, in principle
it is just a ''request'' for changing the value. After the assignment is
executed the script continues in the execution of next actions and there is no warranty,
that the object value has been changed (it depends on the current
situation - the system load).
Example:
INT _prevValue
_prevValue := U.Int ; assign previous value
U.Int := U.Int + 1 ; add the value of 1 to object value
IF U.Int = _prevValue THEN ; check the value
; the assignment has not been executed
ELSE
; the assignment has been executed
ENDIF
The case that assignment is not still executed, is more probably. WAIT
action allows to wait for the assignment execution (its completion).
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