Determining dependencies during macro expansion

摘要

In certain embodiments, a parser parses a formula to yield one or more functions, at least one function comprising a dependent value of a dependent object. One or more macro handlers configured to execute the functions are determined. At least one macro handler is instructed to register with one or more dominant objects on behalf of the dependent object, where the dominant objects are used to evaluate the dependent value.

主权项

1. A method comprising:
receiving, at a macro handler, a register instruction to register with one or more dominant objects of a first function on behalf of at least one dependent object, a dependent value of the at least one dependent object depending on one or more dominant values of the one or more dominant objects; in response to receiving the register instruction:
identifying, by the macro handler, the one or more dominant objects comprising input for the first function;registering with the one or more dominant objects on behalf of the at least one dependent object; andinstructing the one or more dominant objects to notify the at least one dependent object of a change in a dominant value of the dominant object; receiving an instruction to remove the registration with the one or more dominant objects, the instruction sent in response to receiving a formula comprising a second function differing from the first function; and removing the registration.