| Navigation: Language Reference > 2 - Program Source Code Format > Program Format >====== PROCEDURE Calls ====== |    |
procname[(parameters)]
return = funcname[(parameters)]
| procname | The name of the PROCEDURE as declared in the procedure's prototype. |
| parameters | An optional parameter list passed to the PROCEDURE. A parameter list may be one or more variable labels or expressions. The parameters are delimited by commas and are declared in the prototype. |
| return | The label of a variable to receive the value returned by the PROCEDURE. |
| funcname | The name of a PROCEDURE which returns a value, as declared in the procedure's prototype. |
A PROCEDURE is called by its label (including any parameter list) as a statement in the CODE section of a PROGRAM or PROCEDURE. The parameter list must match the parameter list declared in the procedure's prototype. Procedures cannot be called in expressions.
A PROCEDURE which returns a value is called by its label (including any parameter list) as a component of an expression or parameter list passed to another PROCEDURE. The parameter list must match the parameter list declared in the procedure's prototype. A PROCEDURE which returns a value may also be called by its label (including any parameter list), in the same manner as a PROCEDURE which doesn't return a value, if its return value is not needed. This will generate a compiler warning that can be safely ignored (unless the PROC attribute is placed on its prototype).
If the PROCEDURE is a method of a CLASS, the procname must begin with the label of an object instance of the CLASS followed by a period then the label of the PROCEDURE (objectname.procname).
Example:
PROGRAM
MAP
ComputeTime PROCEDURE(*GROUP) !Passing a group parameter
!PROCEDURE returning a value and passing no parameters:
MatchMaster PROCEDURE,BYTE,PROC
END
ParmGroup GROUP !Declare a group
FieldOne STRING(10)
FieldTwo LONG
END
CODE
FieldTwo = CLOCK() !Built-in procedure called as expression
ComputeTime(ParmGroup) !Call the compute time procedure
MatchMaster() !Call the procedure as a procedure
See Also: