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317 lines
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<!DOCTYPE HTML>
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<HTML LANG="en-us"
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>*print-case* | Common Lisp Nova Spec</TITLE
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><BODY
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><DIV
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><DIV CLASS="breadcrumb"
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><SPAN CLASS="breadcrumb-item"
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><A HREF="index.html"
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>Common Lisp Nova Spec</A
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></SPAN
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="22_Printer.html"
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>22. Printer</A
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="22_4_Printer_Dictionary.html"
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>22.4 Printer Dictionary</A
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="v_print-case.html"
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>*print-case*</A
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><A HREF="v_print-base.html" CLASS="prev"
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>←</A
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><SPAN ID="apropos-label"
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>Apropos </SPAN
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><INPUT ID="apropos" AUTOFOCUS="AUTOFOCUS" PLACEHOLDER="Type here to search" ONINPUT="aproposInput(this);" ONKEYUP="aproposKeyup(event);" ONCHANGE="aproposChange(this);" ONFOCUS="aproposFocus(this);" ONFOCUSOUT="aproposFocusout(this);"
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></DIV
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><DIV CLASS="matter"
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><DIV CLASS="com"
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><DIV CLASS="begincom"
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><HR
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><TABLE WIDTH="100%" CELLSPACING="0" CELLPADDING="0"
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><TR
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><TD ALIGN="LEFT" VALIGN="BASELINE" WIDTH="100%" CLASS="name"
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><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="*print-case*"
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></SPAN
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><SPAN CLASS="cmsy"
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>*</SPAN
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><B
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>print-case</B
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><SPAN CLASS="cmsy"
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>*</SPAN
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></TD
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><TD ALIGN="RIGHT" VALIGN="BASELINE" WIDTH="0" NOWRAP="NOWRAP" CLASS="ftype"
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><I
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>Variable</I
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></TD
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></TR
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></TABLE
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><HR
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></DIV
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><UL CLASS="subtoc"
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></UL
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><DL
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><DT
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><B
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>Value Type</B
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></DT
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><DD
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><P CLASS="j"
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>One of the <A HREF="26_1_Glossary.html#symbol"
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><EM CLASS="term"
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>symbols</EM
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></A
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> <SPAN CLASS="kwd"
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><SPAN CLASS="cmtt"
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>:upcase</SPAN
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></SPAN
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>, <SPAN CLASS="kwd"
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><SPAN CLASS="cmtt"
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>:downcase</SPAN
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></SPAN
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>, or <SPAN CLASS="kwd"
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><SPAN CLASS="cmtt"
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>:capitalize</SPAN
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></SPAN
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>.</P
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></DD
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><DT
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><B
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>Initial Value</B
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></DT
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><DD
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><P CLASS="j"
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>The <A HREF="26_1_Glossary.html#symbol"
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><EM CLASS="term"
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>symbol</EM
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></A
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> <SPAN CLASS="kwd"
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><SPAN CLASS="cmtt"
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>:upcase</SPAN
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></SPAN
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>.</P
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></DD
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><DT
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><B
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>Description</B
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></DT
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><DD
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><P CLASS="j"
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>The <A HREF="26_1_Glossary.html#value"
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><EM CLASS="term"
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>value</EM
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></A
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> of <A HREF="v_print-case.html" CLASS="misc"
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><B
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>*print-case*</B
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></A
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> controls the case (upper, lower, or mixed) in which to print any uppercase characters in the names of <A HREF="26_1_Glossary.html#symbol"
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><EM CLASS="term"
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>symbols</EM
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></A
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> when vertical-bar syntax is not used. </P
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><P CLASS="j"
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><A HREF="v_print-case.html" CLASS="varref"
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><B
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>*print-case*</B
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></A
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> has an effect at all times when the <A HREF="26_1_Glossary.html#value"
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><EM CLASS="term"
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>value</EM
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></A
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> of <A HREF="v_print-escape.html" CLASS="misc"
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><B
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>*print-escape*</B
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></A
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> is <A HREF="26_1_Glossary.html#false"
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><EM CLASS="term"
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>false</EM
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></A
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>. <A HREF="v_print-case.html" CLASS="varref"
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><B
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>*print-case*</B
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></A
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> also has an effect when the <A HREF="26_1_Glossary.html#value"
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><EM CLASS="term"
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>value</EM
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></A
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> of <A HREF="v_print-escape.html" CLASS="misc"
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><B
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>*print-escape*</B
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></A
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> is <A HREF="26_1_Glossary.html#true"
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><EM CLASS="term"
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>true</EM
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></A
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> unless inside an escape context (<I CLASS="i"
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><I
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>i.e.</I
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></I
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>, unless between <A HREF="26_1_Glossary.html#vertical-bar"
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><EM CLASS="term"
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>vertical-bars</EM
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></A
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> or after a <A HREF="26_1_Glossary.html#slash"
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><EM CLASS="term"
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>slash</EM
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></A
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>).</P
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></DD
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><DT
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><B
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>Examples</B
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></DT
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><DD
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><PRE CLASS="screen"
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> (defun test-print-case ()
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(dolist (*print-case* '(:upcase :downcase :capitalize))
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(format t "~&~S ~S~%" 'this-and-that '|And-something-elSE|)))
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<SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> TEST-PC
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;; Although the choice of which characters to escape is specified by
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;; *PRINT-CASE*, the choice of how to escape those characters
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;; (i.e., whether single escapes or multiple escapes are used)
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;; is implementation-dependent. The examples here show two of the
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;; many valid ways in which escaping might appear.
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(test-print-case) ;Implementation A
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<SPAN CLASS="cmr"
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>⊳</SPAN
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> THIS-AND-THAT |And-something-elSE|
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<SPAN CLASS="cmr"
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>⊳</SPAN
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> this-and-that a\n\d-\s\o\m\e\t\h\i\n\g-\e\lse
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<SPAN CLASS="cmr"
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>⊳</SPAN
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> This-And-That A\n\d-\s\o\m\e\t\h\i\n\g-\e\lse
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<SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> NIL
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(test-print-case) ;Implementation B
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<SPAN CLASS="cmr"
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>⊳</SPAN
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> THIS-AND-THAT |And-something-elSE|
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<SPAN CLASS="cmr"
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>⊳</SPAN
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> this-and-that a|nd-something-el|se
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<SPAN CLASS="cmr"
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>⊳</SPAN
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> This-And-That A|nd-something-el|se
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<SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> NIL</PRE
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></DD
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><DT
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><B
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>See Also</B
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></DT
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><DD
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><P CLASS="j"
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><A HREF="f_write.html" CLASS="funref"
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><B
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>write</B
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></A
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></P
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></DD
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><DT
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><B
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>Notes</B
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></DT
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><DD
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><P CLASS="j"
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><A HREF="f_read.html" CLASS="funref"
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><B
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>read</B
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></A
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> normally converts lowercase characters appearing in <A HREF="26_1_Glossary.html#symbol"
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><EM CLASS="term"
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>symbols</EM
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></A
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> to corresponding uppercase characters, so that internally print names normally contain only uppercase characters. </P
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><P CLASS="j"
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>If <A HREF="v_print-escape.html" CLASS="varref"
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><B
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>*print-escape*</B
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></A
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> is <A HREF="26_1_Glossary.html#true"
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><EM CLASS="term"
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>true</EM
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></A
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>, lowercase characters in the <A HREF="26_1_Glossary.html#name"
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><EM CLASS="term"
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>name</EM
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></A
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> of a <A HREF="26_1_Glossary.html#symbol"
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><EM CLASS="term"
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>symbol</EM
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></A
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> are always printed in lowercase, and are preceded by a single escape character or enclosed by multiple escape characters; uppercase characters in the <A HREF="26_1_Glossary.html#name"
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><EM CLASS="term"
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>name</EM
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></A
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> of a <A HREF="26_1_Glossary.html#symbol"
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><EM CLASS="term"
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>symbol</EM
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></A
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> are printed in upper case, in lower case, or in mixed case so as to capitalize words, according to the value of <A HREF="v_print-case.html" CLASS="varref"
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><B
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>*print-case*</B
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></A
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>. The convention for what constitutes a “word” is the same as for <A HREF="f_string-upcase.html" CLASS="funref"
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><B
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>string-capitalize</B
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></A
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>.</P
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></DD
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></DL
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></DIV
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></DIV
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><DIV CLASS="footer"
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><DIV CLASS="btmnav"
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><A HREF="v_print-base.html" CLASS="prev"
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>←</A
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>→</A
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><DIV CLASS="trail"
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>Conversion to HTML copyright 2023 by Gilbert Baumann</DIV
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