Extract Example Index
This is an index file for some illustrative examples of extract usage.
It is not a reference, and pretty much no explanation of the extract
functions is given here. This file exists to give a quick impression of the
kinds of things extract can do, without taking a lot of time with
explanation, or even attempting to be comprehensive. If you want to
understand the Extract commands used in these examples,
Extract is documented in detail in the Extract User's Guide, available in
postscript] forms. The user's guide has additional examples as well.
Extract excels at essentially two functions:
The following examples highlight these functionalities. These examples are
essentially pared down versions of files I use everyday. I have reduced
their size and complexity for ease of understanding, but this is kind of
tricky. Since extract helps you more as things get more complex, this also
reduces the persuasive power of the examples. Therefore, these examples
represent a compromise between showing off the capabilities of extract, and
keeping the examples relatively straightforward.
- Producing repetitive text (code or otherwise) from a smaller, scripting
- Maintaining related routines out of the same source base
The available extract examples are:
If you are an extract user, and use extract in a way you'd like to share,
please send me a URL, so I can add it to the example list here, if
- The Makefile example, showing how
complex and repetitive Makefiles can be created and maintained with
very little effort. Extract concepts utilized include:
procedures, declare, whiledef, multidef and macros.
- The C renaming example, which
creates a cpp header file which renames C routines so that they may
be called from Fortran. Extract concepts utilized include:
procedures, multidef, whiledef and macros.
- The Fortran77 source maintainence
example, which shows how you can use extract to support multiple
instances of a given routine coming from the same file, as well as
using it to install headers, and so on. Extract concepts utilized
include: extract include files, keylines, and macros.
[User Guide (PDF)]
[User Guide (HTML)]