Question: The Ruby case statement is similar to the switch statement in Java. It has the following syntax: case expression when expression1 then code ... when

The Ruby case statement is similar to the switch statement in Java. It has the following syntax:

case expression

when expression1 then code ...

when expression2 then code ...

when expression3 then code ... ...

else code

end

a.

Describe the syntax in BNF

b.Using the virtual machine instructions (refer to textbook section 3.5.1), give an operational semantic definition of the case statement.

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