1. Another dynamic include library
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Greetings, all...
The attached .zip file contains a library which allows you to dynamically i=
nclude files into your program. This is very similar to the dynamic include=
method Mark Honnor posted to the list on 3/28, but with several improvemen=
ts:
* You can use as many dynamic include files as you want
* Already-included names are caught to prevent hard-to-trace problems
* Temporary include file names can be restricted to prevent accidental
overwriting of permanent include files
Basically, here's how you use it:
------
include dynincl.e
sequence list, another_list
list =3D incl_file_function()
create_include("_temp.e", list)
include _temp.e
delete_include("_temp.e")
another_list =3D once_again()
create_include("_temp2.e", another_list)
include _temp2.e
delete_include("_temp2.e")
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If the programmer had tried this...
create_include("_temp.e", another_list) -- the second time
..the program would have aborted with a "_temp.e has already been included=
" message.
Additionally, if the programmer had tried this...
create_include("temp.e", list)
..the program would have aborted with a type-check failure on the include =
file name. The default rule is that the file name's first character must be=
'_' (an underscore). This rule can be changed to whatever you want; simply=
modify valid_include_name().
See example.ex in the .zip file for an immediately-executable demonstration=
.
Be sure to let me know if you find this useful. Many thanks to Mark Honnor =
for the original idea! :)
Also, Robert Craig: please add this to the contributions page. Thanks!
Be seeing you,
Gabriel Boehme
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"I can't understand why people are frightened by new ideas. I'm frightened =
of old ones." - John Cage
"Men invent new ideals because they dare not attempt old ideals. They look =
forward with enthusiasm, because they are afraid to look back." - G.K. Ches=
terton
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