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Re: [Nmh-workers] nmh internals: argument processing

2013-01-09 10:30:50
ralph wrote:
Hi Paul,

does this solution lead to symbols that can't be found with
simple search tools?  a quick skim made me think it doesn't, but
wanted to check.  i.e., will i find a reference to, say, MARK_FOO
in the code that i can't grep for, because it was constructed with
    name ## _FOO
or something like that?

There's MARK_SWITCHES that's defined and never used directly.  But then
it's indirectly used immediately afterwards by the next two paragraphs.
The code that uses the array, e.g. `switches', uses the same identifier
as is passed to DEFINE_SWITCH_ARRAY() so there's a match for `grep -rw'
or similar there.  The enumerates are being specified in full;  although
they have a common `SW' suffix in the mark.c example I didn't think the
saving/obsfucation a good trade-off.

i see.  so the bulk of the symbols are findable.

i'm not sure moving the "_SWITCHES" suffix into DEFINE_SWITCH_ENUM and
DEFINE_SWITCH_ARRAY is worth it, and i don't see that it's necessary. 
if the invocations were:

    DEFINE_SWITCH_ENUM(MARK_SWITCHES);

and

    DEFINE_SWITCH_ARRAY(MARK_SWITCHES, switches);

then there would be one less hidden symbol in the world.  it would change
the auto-generated length token from LEN_MARK to LEN_MARK_SWITCHES, but
i'm not sure that matters.

(but perhaps i'm missing something else.)

paul


Cheers, Ralph.

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=---------------------
 paul fox, pgf(_at_)foxharp(_dot_)boston(_dot_)ma(_dot_)us (arlington, ma, 
where it's 34.2 degrees)

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