37 lines
4.5 KiB
HTML
37 lines
4.5 KiB
HTML
|
<!-- Common Lisp HyperSpec (TM), version 7.0 generated by Kent M. Pitman on Mon, 11-Apr-2005 2:31am EDT -->
|
||
|
|
<HTML>
|
||
|
|
<HEAD>
|
||
|
|
<TITLE>CLHS: Section 22.3.3.3</TITLE>
|
||
|
|
<LINK HREF="../Data/clhs.css" REL="stylesheet" TYPE="text/css" />
|
||
|
|
<META HTTP-EQUIV="Author" CONTENT="Kent M. Pitman">
|
||
|
|
<META HTTP-EQUIV="Organization" CONTENT="LispWorks Ltd.">
|
||
|
|
<LINK REL=TOP HREF="../Front/index.htm">
|
||
|
|
<LINK REL=COPYRIGHT HREF="../Front/Help.htm#Legal">
|
||
|
|
<LINK REL=DISCLAIMER HREF="../Front/Help.htm#Disclaimer">
|
||
|
|
<LINK REL=PREV HREF="22_ccb.htm">
|
||
|
|
<LINK REL=UP HREF="22_cc.htm">
|
||
|
|
<LINK REL=NEXT HREF="22_ccd.htm">
|
||
|
|
</HEAD>
|
||
|
|
<BODY>
|
||
|
|
<H1><A REV=MADE HREF="http://www.lispworks.com/"><IMG WIDTH=80 HEIGHT=65 ALT="[LISPWORKS]" SRC="../Graphics/LWSmall.gif" ALIGN=Bottom></A><A REL=TOP HREF="../Front/index.htm"><IMG WIDTH=237 HEIGHT=65 ALT="[Common Lisp HyperSpec (TM)]" SRC="../Graphics/CLHS_Sm.gif" ALIGN=Bottom></A> <A REL=PREV HREF="22_ccb.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="22_cc.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="22_ccd.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
|
||
|
|
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<H2>
|
||
|
|
22.3.3.3 Tilde G: General Floating-Point</H2> <P>
|
||
|
|
The next <I>arg</I> is printed as a <A REL=DEFINITION HREF="26_glo_f.htm#float"><I>float</I></A> in either fixed-format or exponential notation as appropriate. <P>
|
||
|
|
The full form is <TT>~</TT><I>w</I><TT>,</TT><I>d</I><TT>,</TT><I>e</I><TT>,</TT><I>k</I><TT>,</TT><I>overflowchar</I><TT>,</TT><I>padchar</I><TT>,</TT><I>exponentchar</I><TT>G</TT>. The format in which to print <I>arg</I> depends on the magnitude (absolute value) of the <I>arg</I>. Let <I>n</I> be an integer such that 10^<I>n</I>-1 <= |<I>arg</I>| < 10^<I>n</I>. Let <I>ee</I> equal <I>e</I>+2, or 4 if <I>e</I> is omitted. Let <I>ww</I> equal <I>w</I>-<I>ee</I>, or <A REL=DEFINITION HREF="a_nil.htm#nil"><B>nil</B></A> if <I>w</I> is omitted. If <I>d</I> is omitted, first let <I>q</I> be the number of digits needed to print <I>arg</I> with no loss of information and without leading or trailing zeros; then let <I>d</I> equal <TT>(max </TT><I>q</I><TT> (min </TT><I>n</I><TT> 7))</TT>. Let <I>dd</I> equal <I>d</I>-<I>n</I>. <P>
|
||
|
|
If 0 <= <I>dd</I> <= <I>d</I>, then <I>arg</I> is printed as if by the format directives <P>
|
||
|
|
<TT>~</TT><I>ww</I><TT>,</TT><I>dd</I><TT>,,</TT><I>overflowchar</I><TT>,</TT><I>padchar</I><TT>F~</TT><I>ee</I><TT>@T</TT> <P>
|
||
|
|
Note that the scale factor <I>k</I> is not passed to the <TT>~F</TT> directive. For all other values of <I>dd</I>, <I>arg</I> is printed as if by the format directive <P>
|
||
|
|
<TT>~</TT><I>w</I><TT>,</TT><I>d</I><TT>,</TT><I>e</I><TT>,</TT><I>k</I><TT>,</TT><I>overflowchar</I><TT>,</TT><I>padchar</I><TT>,</TT><I>exponentchar</I><TT>E</TT> <P>
|
||
|
|
In either case, an <TT>@</TT> modifier is supplied to the <TT>~F</TT> or <TT>~E</TT> directive if and only if one was supplied to the <TT>~G</TT> directive. <P>
|
||
|
|
<TT>~G</TT> binds <A REL=DEFINITION HREF="v_pr_esc.htm#STprint-escapeST"><B>*print-escape*</B></A> to <A REL=DEFINITION HREF="26_glo_f.htm#false"><I>false</I></A> and <A REL=DEFINITION HREF="v_pr_rda.htm#STprint-readablyST"><B>*print-readably*</B></A> to <A REL=DEFINITION HREF="26_glo_f.htm#false"><I>false</I></A>. <P>
|
||
|
|
<P><HR>The following <A REL=META HREF="../Front/X3J13Iss.htm">X3J13 cleanup issues</A>, <I>not part of the specification</I>, apply to this section:<P><UL><LI> <A REL=CHILD HREF="../Issues/iss271.htm">PRINC-READABLY:X3J13-DEC-91</A><LI> <A REL=CHILD HREF="../Issues/iss169.htm">FORMAT-PRETTY-PRINT:YES</A><P></UL><HR>
|
||
|
|
|
||
|
|
<A REL=NAVIGATOR HREF="../Front/StartPts.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Starting Points]" SRC="../Graphics/StartPts.gif" ALIGN=Bottom></A><A REL=TOC HREF="../Front/Contents.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Contents]" SRC="../Graphics/Contents.gif" ALIGN=Bottom></A><A REL=INDEX HREF="../Front/X_Master.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Index]" SRC="../Graphics/Index.gif" ALIGN=Bottom></A><A REL=INDEX HREF="../Front/X_Symbol.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Symbols]" SRC="../Graphics/Symbols.gif" ALIGN=Bottom></A><A REL=GLOSSARY HREF="../Body/26_a.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Glossary]" SRC="../Graphics/Glossary.gif" ALIGN=Bottom></A><A HREF="../Front/X3J13Iss.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Issues]" SRC="../Graphics/Issues.gif" ALIGN=Bottom></A><BR>
|
||
|
|
|
||
|
|
<A REL=COPYRIGHT HREF="../Front/Help.htm#Legal"><I>Copyright 1996-2005, LispWorks Ltd. All rights reserved.</I></A><P>
|
||
|
|
</BODY>
|
||
|
|
</HTML>
|