From: Kevin Ryde <user42@zip.com.au>
Subject: real-part frac
Date: Sat, 22 Nov 2003 06:56:09 +1000 [thread overview]
Message-ID: <87brr5qw46.fsf@zip.com.au> (raw)
[-- Attachment #1: Type: text/plain, Size: 237 bytes --]
Is there a reason for real-part to return a flonum when given a
fraction? Eg. (real-part 1/2) => 0.5.
With exact fractions I might have expected to get back the fraction
unchanged, the same way an exact integer is returned unchanged.
[-- Attachment #2: numbers.c.real-frac.diff --]
[-- Type: text/plain, Size: 388 bytes --]
--- numbers.c.~1.215.~ 1970-01-01 10:00:01.000000000 +1000
+++ numbers.c 2003-11-21 16:43:46.000000000 +1000
@@ -4972,7 +4972,7 @@
else if (SCM_COMPLEXP (z))
return scm_make_real (SCM_COMPLEX_REAL (z));
else if (SCM_FRACTIONP (z))
- return scm_make_real (scm_i_fraction2double (z));
+ return z;
else
SCM_WTA_DISPATCH_1 (g_real_part, z, SCM_ARG1, s_real_part);
}
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next reply other threads:[~2003-11-21 20:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-21 20:56 Kevin Ryde [this message]
2003-11-30 1:30 ` real-part frac Marius Vollmer
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