diff options
| -rw-r--r-- | lispref/nonascii.texi | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/lispref/nonascii.texi b/lispref/nonascii.texi index 47d14018a3a..39848a0969f 100644 --- a/lispref/nonascii.texi +++ b/lispref/nonascii.texi @@ -615,12 +615,15 @@ you will want to find out afterwards which coding system was chosen. @defvar buffer-file-coding-system This variable records the coding system that was used for visiting the current buffer. It is used for saving the buffer, and for writing part -of the buffer with @code{write-region}. When those operations ask the -user to specify a different coding system, -@code{buffer-file-coding-system} is updated to the coding system -specified. - -However, @code{buffer-file-coding-system} does not affect sending text +of the buffer with @code{write-region}. If the text to be written +cannot be safely encoded using the coding system specified by this +variable, these operations select an alternative encoding by calling +the function @code{select-safe-coding-system} (@pxref{User-Chosen +Coding Systems}). If selecting a different encoding requires to ask +the user to specify a coding system, @code{buffer-file-coding-system} +is updated to the newly selected coding system. + +@code{buffer-file-coding-system} does @emph{not} affect sending text to a subprocess. @end defvar @@ -633,9 +636,10 @@ When a command to save the buffer starts out to use @code{buffer-file-coding-system} (or @code{save-buffer-coding-system}), and that coding system cannot handle the actual text in the buffer, the command asks the user to choose -another coding system. After that happens, the command also updates -@code{buffer-file-coding-system} to represent the coding system that the -user specified. +another coding system (by calling @code{select-safe-coding-system}). +After that happens, the command also updates +@code{buffer-file-coding-system} to represent the coding system that +the user specified. @end defvar @defvar last-coding-system-used @@ -739,6 +743,7 @@ systems used for I/O to a subprocess. @node User-Chosen Coding Systems @subsection User-Chosen Coding Systems +@cindex select safe coding system @defun select-safe-coding-system from to &optional default-coding-system accept-default-p This function selects a coding system for encoding specified text, asking the user to choose if necessary. Normally the specified text |