org.jawk.intermediate
Interface HasFunctionAddress

public interface HasFunctionAddress

A placeholder for an object which has a reference to a function address, but which may not be realized yet. This is particularly important for forward-referenced functions. For example:

 BEGIN { f(3) }
 function f(x) { print x*x }
 

f() is refered to prior to its definition. Therefore, the getFunctionAddress() call within the BEGIN block will not return a meaningful address. However, anytime after f(x) is defined, getFunctionAddress() will return the correct function address.

Method Summary

Address

getFunctionAddress() Get an address to the tuple where this function is defined.

Method Detail

getFunctionAddress

Address getFunctionAddress()

Get an address to the tuple where this function is defined.

If getFunctionAddress() is called prior to defining the function address (prior to parsing the function block), the result is undefined. (As of this writing, a NullPointerException is thrown.)