RETURN operator

The RETURN operator creates an action that implements exit from an action created by the EXEC operator.

Syntax

RETURN [resultExpr]

Description

The RETURN operator creates an action that exits from the most nested action call. When resultExpr is supplied, the value of that expression becomes the result of the call; this form is used in actions whose result class is declared (for example, in abstract actions with a return class). Without resultExpr the call simply exits and produces no value.

Parameters

• resultExpr

  Optional expression. Its value is returned to the caller as the result of the surrounding action. The expression's class must match the result class declared for that action.

Examples

// bare RETURN — exits the surrounding action without producing a value
importFile  {
    LOCAL file = FILE ();
    INPUT f = FILE DO {
        file () <- f;
    }

    IF NOT file() THEN RETURN;
}

// RETURN with an expression — provides a value as the result of an abstract action with a return class
getLocalizedTitle(Issue issue) ABSTRACT STRING[100] (Language);
getLocalizedTitle (Issue issue) + {
    FOR Language l IS Language DO
        RETURN localizedTitle(issue, l);
}