Re: Errata for SRFI 48: Intermediate Format Strings

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I've just published another refinement, also submitted by Mr. Hamayama, to
the reference implementation of SRFI 48.  (Thanks yet again!)

Here's his description:

  I found that the behavior of format ~F is
  determined by the implementation of
  'number->string'.

  If (number->string (exact->inexact 0.0003))
  returns "0.0003", (format "~1,2F" 0.0003)
  returns "0.00".

  If (number->string (exact->inexact 0.0003))
  returns "3.0e-4", (format "~1,2F" 0.0003)
  returns "3.00e-4".

  I think this behavior should be customizable but
  it seems difficult.

  So, I defined three procedures near the top of
  code and added a comment that explains them.

  If system provides a kind of 'number->string'
  that can select whether output is fixed-point
  notation or exponential notation, user can use
  it by overwriting these procedures.

  Also, I refactored some code and confirmed all
  tests are passed in the following environment.

  OS: Windows 8.1 (64bit) DevTool: MSYS2/MinGW-w64
  (64bit) (gcc version 7.1.0 (Rev2, Built by MSYS2
  project)) Scheme: Gauche v0.9.6_pre4,
  Sagittarius v0.8.4, Racket v6.7

Here's the diff:

  <
https://github.com/scheme-requests-for-implementation/srfi-48/compare/e19da08d310454ce5c52f2aa28683abfe0490e50...d35962746b6ccf25ce7490fdf059305e8c5d5949
>

Regards,


SRFI Editor

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<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote">I&#3=
9;ve just published another refinement, also submitted by Mr. Hamayama, to =
the reference implementation of SRFI 48.=C2=A0 (Thanks yet again!)</div><di=
v class=3D"gmail_quote"><br></div><div class=3D"gmail_quote">Here&#39;s his=
 description:</div><div class=3D"gmail_quote"><br></div><div class=3D"gmail=
_quote"><div class=3D"gmail_quote">=C2=A0 I found that the behavior of form=
at ~F is</div><div class=3D"gmail_quote">=C2=A0 determined by the implement=
ation of</div><div class=3D"gmail_quote">=C2=A0 &#39;number-&gt;string&#39;=
.</div><div class=3D"gmail_quote"><br></div><div class=3D"gmail_quote">=C2=
=A0 If (number-&gt;string (exact-&gt;inexact 0.0003))</div><div class=3D"gm=
ail_quote">=C2=A0 returns &quot;0.0003&quot;, (format &quot;~1,2F&quot; 0.0=
003)</div><div class=3D"gmail_quote">=C2=A0 returns &quot;0.00&quot;.</div>=
<div class=3D"gmail_quote"><br></div><div class=3D"gmail_quote">=C2=A0 If (=
number-&gt;string (exact-&gt;inexact 0.0003))</div><div class=3D"gmail_quot=
e">=C2=A0 returns &quot;3.0e-4&quot;, (format &quot;~1,2F&quot; 0.0003)</di=
v><div class=3D"gmail_quote">=C2=A0 returns &quot;3.00e-4&quot;.</div><div =
class=3D"gmail_quote"><br></div><div class=3D"gmail_quote">=C2=A0 I think t=
his behavior should be customizable but</div><div class=3D"gmail_quote">=C2=
=A0 it seems difficult.</div><div class=3D"gmail_quote"><br></div><div clas=
s=3D"gmail_quote">=C2=A0 So, I defined three procedures near the top of</di=
v><div class=3D"gmail_quote">=C2=A0 code and added a comment that explains =
them.</div><div class=3D"gmail_quote"><br></div><div class=3D"gmail_quote">=
=C2=A0 If system provides a kind of &#39;number-&gt;string&#39;</div><div c=
lass=3D"gmail_quote">=C2=A0 that can select whether output is fixed-point</=
div><div class=3D"gmail_quote">=C2=A0 notation or exponential notation, use=
r can use</div><div class=3D"gmail_quote">=C2=A0 it by overwriting these pr=
ocedures.</div><div class=3D"gmail_quote"><br></div><div class=3D"gmail_quo=
te">=C2=A0 Also, I refactored some code and confirmed all</div><div class=
=3D"gmail_quote">=C2=A0 tests are passed in the following environment.</div=
><div class=3D"gmail_quote"><br></div><div class=3D"gmail_quote">=C2=A0 OS:=
 Windows 8.1 (64bit) DevTool: MSYS2/MinGW-w64</div><div class=3D"gmail_quot=
e">=C2=A0 (64bit) (gcc version 7.1.0 (Rev2, Built by MSYS2</div><div class=
=3D"gmail_quote">=C2=A0 project)) Scheme: Gauche v0.9.6_pre4,</div><div cla=
ss=3D"gmail_quote">=C2=A0 Sagittarius v0.8.4, Racket v6.7</div></div><div c=
lass=3D"gmail_quote"><br></div><div class=3D"gmail_quote">Here&#39;s=C2=A0t=
he diff:<br><br>=C2=A0 &lt;<a href=3D"https://github.com/scheme-requests-fo=
r-implementation/srfi-48/compare/e19da08d310454ce5c52f2aa28683abfe0490e50..=
.d35962746b6ccf25ce7490fdf059305e8c5d5949">https://github.com/scheme-reques=
ts-for-implementation/srfi-48/compare/e19da08d310454ce5c52f2aa28683abfe0490=
e50...d35962746b6ccf25ce7490fdf059305e8c5d5949</a>&gt;<br>=C2=A0<br>Regards=
,<br><br></div><div class=3D"gmail_quote"><br></div><div class=3D"gmail_quo=
te">SRFI Editor</div></div></div>

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