while, break

Syntax

while (condition) {
    body
}

where:

• condition: an MQL expression that evaluates to a boolean value.
• body: any set of MQL statements.

Description

The while statement processes the code between the braces while the condition evaluates to true.

You may leave the while loop using the break directive.

Examples

This code processes a UML element and its owners and calls a rule with each name as argument:

element : uml21.Element = ...;
while (element != null)
    @myRule(element.name);
    element = element.owner;
}

We could decide to break the loop when we encouter the name 'AccountPackage':

myPackage : uml21.Package = ...;
element : uml21.Element = ...;
while (element != null)
    // break if we encounter an 'AccountPackage' name
    if (element.name == "AccountPackage") {
        break;
    }

    @myRule(element.name);
    element = element.owner;
}