..
  Copyright 1988-2022 Free Software Foundation, Inc.
  This is part of the GCC manual.
  For copying conditions, see the copyright.rst file.

.. index:: data structures

.. _frontend-data-structures:

Frontend Data Structures
------------------------

This chapter should describe the details necessary to understand how
the various ``gfc_*`` data are used and interact.  In general it is
advisable to read the code in :samp:`dump-parse-tree.cc` as its routines
should exhaust all possible valid combinations of content for these
structures.

.. toctree::
  :maxdepth: 2

  gfccode
  gfcexpr