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* io.c (IO#new):

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Documentation for IO#open modes and formatting
  [ruby-core#48052] [Bug #7179]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37443 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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zzak 2012-11-03 04:27:56 +00:00
parent dbfb5deab6
commit 4d42277823
1 changed files with 19 additions and 18 deletions
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io.c
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@ -6962,31 +6962,32 @@ rb_io_stdio_file(rb_io_t *fptr)
*
* Ruby allows the following open modes:
*
* "r" :: Read-only, starts at beginning of file (default mode).
* "r" Read-only, starts at beginning of file (default mode).
*
* "r+" :: Read-write, starts at beginning of file.
* "r+" Read-write, starts at beginning of file.
*
* "w" :: Write-only, truncates existing file
* to zero length or creates a new file for writing.
* "w" Write-only, truncates existing file
* to zero length or creates a new file for writing.
*
* "w+" :: Read-write, truncates existing file to zero length
* or creates a new file for reading and writing.
* "w+" Read-write, truncates existing file to zero length
* or creates a new file for reading and writing.
*
* "a" :: Write-only, starts at end of file if file exists,
* otherwise creates a new file for writing.
* "a" Write-only, starts at end of file if file exists,
* otherwise creates a new file for writing.
*
* "a+" :: Read-write, starts at end of file if file exists,
* otherwise creates a new file for reading and
* writing.
* "a+" Read-write, starts at end of file if file exists,
* otherwise creates a new file for reading and
* writing.
*
* "b" :: Binary file mode (may appear with
* any of the key letters listed above).
* Suppresses EOL <-> CRLF conversion on Windows. And
* sets external encoding to ASCII-8BIT unless explicitly
* specified.
* The following modes must be used separately, and along with one or more of
* the modes seen above.
*
* "t" :: Text file mode (may appear with
* any of the key letters listed above except "b").
* "b" Binary file mode
* Suppresses EOL <-> CRLF conversion on Windows. And
* sets external encoding to ASCII-8BIT unless explicitly
* specified.
*
* "t" Text file mode
*
* When the open mode of original IO is read only, the mode cannot be
* changed to be writable. Similarly, the open mode cannot be changed from