Leopold Toetsch:
# The questions are (and this is IMHO the same problem with PMCs):
# - set vs assign
# - what should this program do
This idea may be totally on crack, but why do we even have S and P
registers as pointers? What if the S registers were basically just
STRING[32] and the Ps were
Peter Gibbs wrote:
Leopold Toetsch wrote:
Fine. But how do we know, which version we could take. Please read again
Peter's example. It depends on the semantics of Sx register usage all
over the program IMHO.
In an attempt to clarify the positions here, let us start with a shorter
example:
Brent Dax wrote:
Leopold Toetsch:
# The questions are (and this is IMHO the same problem with PMCs):
# - set vs assign
# - what should this program do
This idea may be totally on crack, but why do we even have S and P
registers as pointers? What if the S registers were basically just
Peter Gibbs wrote:
An extended version of my previous example follows, as it points
out some more inconsistent behaviour.
Here is a simple example, which shows inconsistent WRT strings:
set S0, not
set S1, S0
set S0, ok
print S1
print \n
new P0, .PerlString
set
As suggested by Brent, string_set gives us a big improvement, where
strings are heavily used. One examples is life.pasm, where the generate
loop does:
substr S0, S15, I3, 1
~10^6 times. Till now, S0 (the result of substr) was constructed every
time, now it get's just reused.
This improves
Leopold Toetsch wrote:
[ substr in life.pasm ]
~10^6 times.
10^7
set S0, S1 { $1 = $2 }
would become string_set(interpreter, $1, $2)
Exactly this example is wrong, because here these 2 registers just point
to the same string.
leo
Leopold Toetsch wrote:
string_set is currently only used in string_substr, but, when people are
ok with this, can be used everywhere in core.ops, where a string
register is globbered.
The behaviour of the following program has changed, is this correct?
set S0, test
set S1, S0
set S2,
Peter Gibbs wrote:
Leopold Toetsch wrote:
string_set is currently only used in string_substr, but, when people are
ok with this, can be used everywhere in core.ops, where a string
register is globbered.
The behaviour of the following program has changed, is this correct?
set S0, test
At 2:13 PM +0100 11/6/02, Leopold Toetsch wrote:
Peter Gibbs wrote:
Leopold Toetsch wrote:
string_set is currently only used in string_substr, but, when
people are ok with this, can be used everywhere in core.ops, where
a string register is globbered.
The behaviour of the following
Dan Sugalski wrote:
Substr should generate a new string and stick that into S0.
If we want to build a fast version that reuses a string register, I'm
fine with that--it's definitely useful in a large number of
circumstances, large enough to warrant expressing both sets of semantics.
Fine.
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