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Source for ticket #20
cc
changetime
2012-10-05 00:05:34
component
WG1 - Numerics
description
R6RS provides support for inexact infinities
and NaN objects. Do we keep these, and if so
do we use the same literal syntax and arithmetic
as in R6RS?
id
20
keywords
milestone
owner
alexshinn
priority
major
reporter
alexshinn
resolution
fixed
severity
status
closed
summary
inexact infinities
time
2010-02-23 16:45:06
type
defect
Changes
Change at time 2012-10-05 00:05:34
author
cowan
field
comment
newvalue
oldvalue
8
raw-time
1349370334625312
ticket
20
time
2012-10-05 00:05:34
Change at time 2012-10-05 00:05:34
author
cowan
field
resolution
newvalue
fixed
oldvalue
raw-time
1349370334625312
ticket
20
time
2012-10-05 00:05:34
Change at time 2012-10-05 00:05:34
author
cowan
field
status
newvalue
closed
oldvalue
writing
raw-time
1349370334625312
ticket
20
time
2012-10-05 00:05:34
Change at time 2011-03-03 22:58:16
author
alexshinn
field
comment
newvalue
oldvalue
7
raw-time
1299164296000000
ticket
20
time
2011-03-03 22:58:16
Change at time 2011-03-03 22:58:16
author
alexshinn
field
owner
newvalue
alexshinn
oldvalue
raw-time
1299164296000000
ticket
20
time
2011-03-03 22:58:16
Change at time 2011-03-03 22:58:16
author
alexshinn
field
status
newvalue
writing
oldvalue
decided
raw-time
1299164296000000
ticket
20
time
2011-03-03 22:58:16
Change at time 2011-01-29 11:39:12
author
alexshinn
field
comment
newvalue
oldvalue
6
raw-time
1296272352000000
ticket
20
time
2011-01-29 11:39:12
Change at time 2011-01-29 11:39:12
author
alexshinn
field
status
newvalue
decided
oldvalue
assigned
raw-time
1296272352000000
ticket
20
time
2011-01-29 11:39:12
Change at time 2011-01-29 11:39:01
author
alexshinn
field
comment
newvalue
oldvalue
5
raw-time
1296272341000000
ticket
20
time
2011-01-29 11:39:01
Change at time 2011-01-29 11:39:01
author
alexshinn
field
owner
newvalue
oldvalue
alexshinn
raw-time
1296272341000000
ticket
20
time
2011-01-29 11:39:01
Change at time 2011-01-29 11:39:01
author
alexshinn
field
status
newvalue
assigned
oldvalue
reopened
raw-time
1296272341000000
ticket
20
time
2011-01-29 11:39:01
Change at time 2011-01-29 11:38:47
author
alexshinn
field
comment
newvalue
oldvalue
4
raw-time
1296272327000000
ticket
20
time
2011-01-29 11:38:47
Change at time 2011-01-29 11:38:47
author
alexshinn
field
resolution
newvalue
oldvalue
fixed
raw-time
1296272327000000
ticket
20
time
2011-01-29 11:38:47
Change at time 2011-01-29 11:38:47
author
alexshinn
field
status
newvalue
reopened
oldvalue
closed
raw-time
1296272327000000
ticket
20
time
2011-01-29 11:38:47
Change at time 2010-10-18 03:00:42
author
cowan
field
comment
newvalue
The WG voted to accept this feature just as in R6RS.
oldvalue
3
raw-time
1287345642000000
ticket
20
time
2010-10-18 03:00:42
Change at time 2010-10-18 03:00:42
author
cowan
field
resolution
newvalue
fixed
oldvalue
raw-time
1287345642000000
ticket
20
time
2010-10-18 03:00:42
Change at time 2010-10-18 03:00:42
author
cowan
field
status
newvalue
closed
oldvalue
new
raw-time
1287345642000000
ticket
20
time
2010-10-18 03:00:42
Change at time 2010-03-16 06:12:32
author
kumoyuki
field
comment
newvalue
Larceny certainly handles the +info.0 syntax. I am in favor of having explicit representations for infinities and NaN in any case...
oldvalue
2
raw-time
1268694752000000
ticket
20
time
2010-03-16 06:12:32
Change at time 2010-03-16 06:12:32
author
kumoyuki
field
milestone
newvalue
oldvalue
raw-time
1268694752000000
ticket
20
time
2010-03-16 06:12:32
Change at time 2010-03-01 08:50:24
author
cowan
field
comment
newvalue
Testing Schemes with +inf.0 -inf.0 +nan.0, and if required (/ 1.0, 0.0) (/ 0.0 0.0):
PLT, Gauche, Gambit, Chicken[1], Bigloo, Guile, Chez, Chibi understand the syntaxes.
MIT, Scheme48/scsh, Kawa[2], SISC[3], SCM[4], Scheme 9, Scheme 7, VSCM do not.
SSCM doesn't seem to support anything but small exact integers.
[1] Chicken accepts the standard syntax, but outputs +inf, -inf, +nan without the .0
[2] Kawa uses the syntax #i1/0, #i-1/0, #i0/0
[3] SISC outputs infinity.0, -infinity.0, nan.0 but does not accept them on input
[4] SCM accepts and outputs +inf.0 and -inf.0, but uses 0/0 for NaNs.
I recommend that we accept the R6RS syntax.
oldvalue
1
raw-time
1267404624000000
ticket
20
time
2010-03-01 08:50:24