INPUT/OUTPUT FUNCTIONS

Note that when printing objects, printing is accomplished by sending the message :prin1 to the object.

READ AN EXPRESSION

(read [<stream> [<eofp> [<eof> [<rflag>]]]])

NOTE: there has been an incompatible change in arguments from prior versions.

MODIFY READ TABLE

(set-macro-character <ch> <fcn> [ T ])

defined in init.lsp

EXAMINE READ TABLE

(get-macro-character <ch>)

defined in init.lsp

PRINT AN EXPRESSION ON A NEW LINE

(print <expr> [<stream>])

The expression is printed using prin1, then current line is terminated (Note: this is backwards from Common Lisp).

PRINT AN EXPRESSION

(prin1 <expr> [<stream>])

symbols, cons cells (without circularities), arrays, strings, numbers, and characters are printed in a format generally acceptable to the read function. Printing format can be affected by the global formatting variables: *print-level* and *print-length* for lists and arrays, *integer-format* for fixnums, *float-format* for flonums, *ratio-format* for ratios, and *print-case* and *readtable-case* for symbols.

PRINT AN EXPRESSION WITHOUT QUOTING

(princ <expr> [<stream>])

Like PRIN1 except symbols (including uninterned), strings, and characters are printed without using any quoting mechanisms.

PRETTY PRINT AN EXPRESSION

(pprint <expr> [<stream>])

Uses prin1 for printing.

TERMINATE THE CURRENT PRINT LINE

(terpri [<stream>])

START A NEW LINE

(fresh-line [<stream>])

LENGTH OF PRINTED REPRESENTATION USING PRIN1

(flatsize <expr>)

LENGTH OF PRINTED REPRESENTATION USING PRINC

(flatc <expr>)

ASK A YES OR NO QUESTION

(y-or-n-p [<fmt> [<arg>...]])

(yes-or-no-p [<fmt> [<arg>...]])

defined in common.lsp. Uses *terminal-io* stream for interaction. y-or-n-p strives for a single character answer, using get-key if defined.

XLISP-PLUS - Version 2.1g - Tom Almy tom.almy@tek.com - 18 JUL 94
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