.. index:: Auxiliary modules; Code manager

Code Manager
------------

When generating code, our compiler will need to handle pieces of code created by different subtrees and combine them together to create more code (e.g. to create code for a *while*, the compiler will need to combine the code to compute the expression and the code of the instruction inside the loop with the right labels and jump instructions).

The Code Manager module provides a class ``code`` that can be used to handle this code combinations, and finally write it to the output file when it is complete. Objects of type ``code`` contain ``subroutine`` objects, which contain ``instructionList`` objects, which in turn contain ``instruction`` objects.

All these classes have methods to extend and combine them (e.g. add a ``subroutine`` to a ``code``, or add an ``instruction`` to an ``instructionList``, concatenate two ``instructionList`` objects, etc.)

Additionally, this module contains also a static class ``counters`` that manages counters to generate labels for jumps in *if* and *while* instructions, and well as for temporal registers.

.. literalinclude:: ../../../practica/common/code.h
   :language: c++
   :linenos:
   :lines: 38-210,219-243,251-259,266-283,289-295,301-