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[bpt/guile.git] / NEWS

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+++ b/NEWS
@@ -6,6 +6,71 @@ Please send Guile bug reports to bug-guile@gnu.org.
 \f
 Changes since Guile 1.3:
 
+* Changes to the stand-alone interpreter
+
+** New options interface: readline-options,
+readline-enable, readline-disable, readline-set!
+
+** Command line history is now restored from and saved to file
+
+If readline is used and the readline option `history-file' is enabled,
+the command line history is read from file when the interpreter is
+entered, and written to file on exit.  The filename used can be
+specified with the environment variable GUILE_HISTORY.  Default file
+name is "$HOME/.guile_history".  Nothing special happens if errors
+occur during read or write.
+
+** Command line history length can now be customized.
+Command line history length is now controlled by the readline option
+`history-length'.  Default is 200 lines.
+
+* Changes to Scheme functions and syntax
+
+** The range of logand, logior, logxor, logtest, and logbit? have changed.
+
+These functions now operate on numbers in the range of a C unsigned
+long.
+
+These functions used to operate on numbers in the range of a C signed
+long; however, this seems inappropriate, because Guile integers don't
+overflow.
+
+** All builtins now print as primitives.
+Previously builtin procedures not belonging to the fundamental subr
+types printed as #<compiled closure #<primitive-procedure gsubr-apply>>.
+Now, they print as #<primitive-procedure NAME>.
+
+** Backtraces slightly more intelligible.
+gsubr-apply and macro transformer application frames no longer appear
+in backtraces.
+
+* Changes to Scheme functions and syntax
+
+** New functions: delq1!, delv1!, delete1!
+These procedures behave similar to delq! and friends but delete only
+one object if at all.
+
+** New function: unread-string STRING PORT
+Unread STRING to PORT, that is, push it back onto the port so that
+next read operation will work on the pushed back characters.
+
+** unread-char can now be called multiple times
+If unread-char is called multiple times, the unread characters will be
+read again in last-in first-out order.
+
+** New function: serial-map PROC LIST1 LIST2 ...
+Version of `map' which guarantees that the procedure is applied to the
+lists in serial order.
+
+** New syntax: collect BODY1 ...
+Version of `begin' which returns a list of the results of the body
+forms instead of the result of the last body form.  In contrast to
+`begin', `collect' allows an empty body.
+
+** New functions: read-history FILENAME, write-history FILENAME
+Read/write command line history from/to file.  Returns #t on success
+and #f if an error occured.
+
 * Changes to the gh_ interface
 
 ** gh_scm2doubles
@@ -263,6 +328,14 @@ True iff OBJ is a macro object.
 Like (macro? OBJ), but true only if OBJ is one of the Guile primitive
 macro transformers, implemented in eval.c rather than Scheme code.
 
+Why do we have this function?
+- For symmetry with procedure? and primitive-procedure?,
+- to allow custom print procedures to tell whether a macro is
+  primitive, and display it differently, and
+- to allow compilers and user-written evaluators to distinguish
+  builtin special forms from user-defined ones, which could be
+  compiled.
+
 *** New function: (macro-type OBJ)
 Return a value indicating what kind of macro OBJ is.  Possible return
 values are: