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[ruby/pp] [DOC] Update for PP.width_for [Feature #12913]

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https://github.com/ruby/pp/commit/cad3cc762c
This commit is contained in:
Nobuyoshi Nakada 2021-12-23 16:09:02 +09:00
parent 2da53b1468
commit c6cf19340a
1 changed files with 12 additions and 1 deletions
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13
lib/pp.rb
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@ -61,6 +61,16 @@ require 'prettyprint'
# Tanaka Akira <akr@fsij.org>
class PP < PrettyPrint
# Returns the usable width for +out+.
# As the width of +out+:
# 1. If +out+ is assigned to a tty device, its width is used.
# 2. Otherwise, or it could not get the value, the +COLUMN+
# environment variable is assumed to be set to the width.
# 3. If +COLUMN+ is not set to a non-zero number, 80 is assumed.
#
# And finally, returns the above width value - 1.
# * This -1 is for Windows command prompt, which moves the cursor to
# the next line if it reaches the last column.
def PP.width_for(out)
begin
require 'io/console'
@ -74,7 +84,8 @@ class PP < PrettyPrint
# +width+ columns in width.
#
# If +out+ is omitted, <code>$></code> is assumed.
# If +width+ is omitted, 79 is assumed.
# If +width+ is omitted, the width of +out+ is assumed (see
# width_for).
#
# PP.pp returns +out+.
def PP.pp(obj, out=$>, width=width_for(out))