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(print-quoted): New variable.

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(print): Print certain expressions more compactly when set.
Also use XCAR and XCDR directly -- we know we have conses.
This commit is contained in:
Erik Naggum 1996-08-24 19:39:34 +00:00
parent 20c5a87d0b
commit 2f100b5c7a
1 changed files with 46 additions and 6 deletions
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52
src/print.c
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@ -39,6 +39,9 @@ Boston, MA 02111-1307, USA. */
Lisp_Object Vstandard_output, Qstandard_output;
/* These are used to print like we read. */
extern Lisp_Object Qbackquote, Qcomma, Qcomma_at, Qcomma_dot, Qfunction;
#ifdef LISP_FLOAT_TYPE
Lisp_Object Vfloat_output_format, Qfloat_output_format;
#endif /* LISP_FLOAT_TYPE */
@ -75,6 +78,12 @@ int print_escape_newlines;
Lisp_Object Qprint_escape_newlines;
/* Nonzero means print (quote foo) forms as 'foo, etc. */
int print_quoted;
Lisp_Object Qprint_quoted;
/* Nonzero means print newline to stdout before next minibuffer message.
Defined in xdisp.c */
@ -991,6 +1000,28 @@ print (obj, printcharfun, escapeflag)
if (INTEGERP (Vprint_level)
&& print_depth > XINT (Vprint_level))
strout ("...", -1, printcharfun);
else if (print_quoted && CONSP (XCDR (obj)) && NILP (XCDR (XCDR (obj)))
&& (EQ (XCAR (obj), Qquote)))
{
PRINTCHAR ('\'');
print (XCAR (XCDR (obj)), printcharfun, escapeflag);
}
else if (print_quoted && CONSP (XCDR (obj)) && NILP (XCDR (XCDR (obj)))
&& (EQ (XCAR (obj), Qfunction)))
{
PRINTCHAR ('#');
PRINTCHAR ('\'');
print (XCAR (XCDR (obj)), printcharfun, escapeflag);
}
else if (print_quoted && CONSP (XCDR (obj)) && NILP (XCDR (XCDR (obj)))
&& ((EQ (XCAR (obj), Qbackquote)
|| EQ (XCAR (obj), Qcomma)
|| EQ (XCAR (obj), Qcomma_at)
|| EQ (XCAR (obj), Qcomma_dot))))
{
print (XCAR (obj), printcharfun, 0);
print (XCAR (XCDR (obj)), printcharfun, escapeflag);
}
else
{
PRINTCHAR ('(');
@ -1012,11 +1043,11 @@ print (obj, printcharfun, escapeflag)
strout ("...", 3, printcharfun);
break;
}
print (Fcar (obj), printcharfun, escapeflag);
obj = Fcdr (obj);
print (XCAR (obj), printcharfun, escapeflag);
obj = XCDR (obj);
}
}
if (!NILP (obj) && !CONSP (obj))
if (!NILP (obj))
{
strout (" . ", 3, printcharfun);
print (obj, printcharfun, escapeflag);
@ -1317,9 +1348,6 @@ print_interval (interval, printcharfun)
void
syms_of_print ()
{
staticpro (&Qprint_escape_newlines);
Qprint_escape_newlines = intern ("print-escape-newlines");
DEFVAR_LISP ("standard-output", &Vstandard_output,
"Output stream `print' uses by default for outputting a character.\n\
This may be any function of one argument.\n\
@ -1365,6 +1393,12 @@ A value of nil means no limit.");
Also print formfeeds as backslash-f.");
print_escape_newlines = 0;
DEFVAR_BOOL ("print-quoted", &print_quoted,
"Non-nil means print quoted forms with reader syntax.\n\
I.e., (quote foo) prints as 'foo, (function foo) as #'foo, and, backquoted\n\
forms print in the new syntax.");
print_quoted = 0;
/* prin1_to_string_buffer initialized in init_buffer_once in buffer.c */
staticpro (&Vprin1_to_string_buffer);
@ -1380,6 +1414,12 @@ Also print formfeeds as backslash-f.");
Qexternal_debugging_output = intern ("external-debugging-output");
staticpro (&Qexternal_debugging_output);
Qprint_escape_newlines = intern ("print-escape-newlines");
staticpro (&Qprint_escape_newlines);
Qprint_quoted = intern ("print-quoted");
staticpro (&Qprint_quoted);
#ifndef standalone
defsubr (&Swith_output_to_temp_buffer);
#endif /* not standalone */