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| author | Chong Yidong <cyd@stupidchicken.com> | 2009-04-29 03:13:16 +0000 |
|---|---|---|
| committer | Chong Yidong <cyd@stupidchicken.com> | 2009-04-29 03:13:16 +0000 |
| commit | dd449674071bf59bfcb965f6909bec764e3c6257 (patch) | |
| tree | ea25a09021270c48efab070054fdb216eea34b36 | |
| parent | 91f68422d65d4fe746e4cd89cd274636a097c4ff (diff) | |
| download | emacs-dd449674071bf59bfcb965f6909bec764e3c6257.tar.gz | |
* variables.texi (File Local Variables): Note that read-circle is
bound to nil when reading file-local variables.
* streams.texi (Input Functions): Document read-circle.
(Output Variables): Add xref to Circular Objects.
| -rw-r--r-- | doc/lispref/ChangeLog | 8 | ||||
| -rw-r--r-- | doc/lispref/streams.texi | 10 | ||||
| -rw-r--r-- | doc/lispref/variables.texi | 5 |
3 files changed, 21 insertions, 2 deletions
diff --git a/doc/lispref/ChangeLog b/doc/lispref/ChangeLog index ff37666b776..5dda8f51cf8 100644 --- a/doc/lispref/ChangeLog +++ b/doc/lispref/ChangeLog @@ -1,3 +1,11 @@ +2009-04-29 Chong Yidong <cyd@stupidchicken.com> + + * variables.texi (File Local Variables): Note that read-circle is + bound to nil when reading file-local variables. + + * streams.texi (Input Functions): Document read-circle. + (Output Variables): Add xref to Circular Objects. + 2009-04-25 Chong Yidong <cyd@stupidchicken.com> * tips.texi (Coding Conventions): Copyedits. Add xref to Named diff --git a/doc/lispref/streams.texi b/doc/lispref/streams.texi index b350c53bfdb..df19cbee430 100644 --- a/doc/lispref/streams.texi +++ b/doc/lispref/streams.texi @@ -341,6 +341,12 @@ This variable holds the default input stream---the stream that The default is @code{t}, meaning use the minibuffer. @end defvar +@defvar read-circle +If non-@code{nil}, this variable enables the reading of circular and +shared structures. @xref{Circular Objects}. Its default value is +@code{t}. +@end defvar + @node Output Streams @section Output Streams @cindex stream (for printing) @@ -794,8 +800,8 @@ Emacs-Lisp Expressions, emacs, The GNU Emacs Manual}). and shared structure: @defvar print-circle -If non-@code{nil}, this variable enables detection of circular -and shared structure in printing. +If non-@code{nil}, this variable enables detection of circular and +shared structure in printing. @xref{Circular Objects} @end defvar @defvar print-gensym diff --git a/doc/lispref/variables.texi b/doc/lispref/variables.texi index 2f97c8c0b5b..75f0b182604 100644 --- a/doc/lispref/variables.texi +++ b/doc/lispref/variables.texi @@ -1539,6 +1539,11 @@ your Emacs. Emacs protects against this by automatically setting only those file-local variables whose specified values are known to be safe. Other file-local variables are set only if the user agrees. + For additional safety, @code{read-circle} is temporarily bound to +@code{nil} when Emacs reads file-local variables (@pxref{Input +Functions}). This prevents the Lisp reader from recognizing circular +and shared Lisp structures (@pxref{Circular Objects}). + @defopt enable-local-variables This variable controls whether to process file-local variables. The possible values are: |