From: 643-408-1753@kylheku.com
On 2025-11-08, Michael Sanders wrote:
> On Sat, 08 Nov 2025 14:57:35 -0800, Keith Thompson wrote:
>
>> (Pedantic quibble: It's not really an acronym, which is a word formed
>> from the initials of several words, like laser, radar, or scuba).
>
> Mnemonic? I don't know...
DFL is a pretty common abbreviation of "default".
Search for identifiers starting with "dfl" or "DFL" (or any mixutre of these)
in a project of mine that is maybe 90-100 KLOC.
That's just one project by one author.
ChangeLog-2009-2015: * gc.c (MALLOC_DELTA_THRESH): Macro remaned to
DFL_MALLOC_DELTA_THRESH.
gc.c:#define DFL_MALLOC_DELTA_THRESH (16L * 1024 * 1024)
gc.c:#define DFL_STACK_LIMIT (128 * 1024L)
gc.c:#define DFL_MALLOC_DELTA_THRESH (64L * 1024 * 1024)
gc.c:#define DFL_STACK_LIMIT (16384 * 1024L)
gc.c:alloc_bytes_t opt_gc_delta = DFL_MALLOC_DELTA_THRESH;
gc.c: gc_stack_limit = gc_stack_bottom - DFL_STACK_LIMIT / sizeof (val);
lib.c: dfl:
lib.c: goto dfl;
lib.c: val dfl = env->v.vec[2];
lib.c: return if3(pos, ref(rng, pos), dfl);
lib.c: cons_bind (hash, dfl, env);
lib.c: return if3(cell, cdr(cell), dfl);
lib.c:val relate(val domain_seq, val range_seq, val dfl_val)
lib.c: return if3(missingp(dfl_val),
lib.c: if3(null(dfl_val),
lib.c: func_f1(cons(hash, dfl_val), do_relate_hash_dfl)),
lib.c: func_f1(vec(domain_seq, range_seq, dfl_val, nao),
lib.h:val relate(val domain_seq, val range_seq, val dfl_val);
lib.h:#define default_arg(arg, dfl) if3(null_or_missing_p(arg), dfl, arg)
lib.h:#define default_arg_strict(arg, dfl) if3(missingp(arg), dfl, arg)
match.c: cons_bind (var, dfl, car(iter));
match.c: int is_dfl = (dfl != noval_s);
match.c: strictly_new_bindings = acons(var, dfl, stri
tly_new_bindings);
match.c: cons_bind (var, dfl_val, car(iter));
match.c: if (dfl_val == noval_s) {
match.c: c->bindings = acons(var, dfl_val, c->bindings);
match.c: val dfl = cadr(var);
match.c: val dfl_ex = expand(dfl, nil);
match.c: ptail = list_collect(ptail, if3(dfl == dfl_ex,
match.c: var, list(sym, dfl_ex, nao)));
match.c: cons_bind (var, dfl, car(iter));
match.c: int is_dfl = (dfl != noval_s);
match.c: strictly_new_bindings = acons(var, dfl, stri
tly_new_bindings);
stdlib/getopts.tl:(defmeth opts lambda (me key : dfl)
stdlib/getopts.tl: (iflet ((o [me.opt-hash key])) o.arg dfl))
stdlib/match.tl: (let ((dfl-cnt 0))
stdlib/match.tl: (inc dfl-cnt))]]]
stdlib/match.tl: (< dfl-cnt 2)
stdlib/match.tl: (or (zerop dfl-cnt)
stdlib/place.tl: dfl-sym)
stdlib/place.tl: (,dfl-sym ,',default))
stdlib/place.tl: ,dfl-sym)))
stream.c: int dfl_precision = 0, dfl_digits = 0, print_base = 0;
stream.c: if (!dfl_digits)
stream.c: dfl_digits = c_num(cdr(lookup_var(nil,
rint_flo_digits_s)), self);
stream.c: precision = dfl_digits;
stream.c: if (!dfl_precision)
stream.c: dfl_precision = c_num(cdr(lookup_var(nil,
stream.c: precision = dfl_precision;
txr.1:.code "[o \(dqv\(dq dfl]"
txr.1:.codn dfl .
I do not believe I'm influenced by SIG_DFL, or if so, certainly
not to a more significant degree by that than other exposure to "dfl"
in the wild.
--
TXR Programming Language: http://nongnu.org/txr
Cygnal: Cygwin Native Application Library: http://kylheku.com/cygnal
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