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| -rw-r--r-- | Doc/lib/libstdtypes.tex | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/Doc/lib/libstdtypes.tex b/Doc/lib/libstdtypes.tex index da7ef0d..0cb8264 100644 --- a/Doc/lib/libstdtypes.tex +++ b/Doc/lib/libstdtypes.tex @@ -1079,7 +1079,12 @@ Files have the following methods: The \var{whence} argument is optional and defaults to \code{0} (absolute file positioning); other values are \code{1} (seek relative to the current position) and \code{2} (seek relative to the - file's end). There is no return value. + file's end). There is no return value. Note that if the file is + opened for appending (mode \code{'a'} or \code{'a+'}), any + \method{seek()} operations will be undone at the next write. If the + file is only opened for writing in append mode (mode \code{'a'}), + this method is essentially a no-op, but it remains useful for files + opened in append mode with reading enabled (mode \code{'a+'}). \end{methoddesc} \begin{methoddesc}[file]{tell}{} |