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commit bash-20141128 snapshot

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Chet Ramey
2014-12-02 16:15:47 -05:00
parent 0a233f3ec4
commit 09f70f2f67
59 changed files with 54337 additions and 2021 deletions
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doc/bashref.texi
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@@ -2186,6 +2186,40 @@ If @var{parameter}
is an array variable subscripted with @samp{@@} or @samp{*},
the case modification operation is applied to each member of the
array in turn, and the expansion is the resultant list.
@item $@{@var{parameter}@@@var{operator}@}
The expansion is either a transformation of the value of @var{parameter}
or information about @var{parameter} itself, depending on the value of
@var{operator}. Each @var{operator} is a single letter:
@table @code
@item Q
The expansion is a string that is the value of @var{parameter} quoted in a
format that can be reused as input.
@item E
The expansion is a string that is the value of @var{parameter} with backslash
escape sequences expanded as with the @code{$'@dots{}'} quoting mechansim.
@item P
The expansion is a string that is the result of expanding the value of
@var{parameter} as if it were a prompt string (@pxref{Controlling the Prompt}).
@item A
The expansion is a string in the form of a @code{declare} command that, if
evaluated, will recreate @var{parameter} with its attributes and value.
@item a
The expansion is a string consisting of flag values representing
@var{parameter}'s attributes.
@end table
If @var{parameter} is @samp{@@} or @samp{*},
the operation is applied to each positional
parameter in turn, and the expansion is the resultant list.
If @var{parameter}
is an array variable subscripted with @samp{@@} or @samp{*},
the operation is applied to each member of the
array in turn, and the expansion is the resultant list.
The result of the expansion is subject to word splitting and pathname
expansion as described below.
@end table
@node Command Substitution
@@ -5185,6 +5219,7 @@ performing filename expansion.
If set, Bash matches patterns in a case-insensitive fashion when
performing matching while executing @code{case} or @code{[[}
conditional commands,
when performing pattern substitution word expansions,
or when filtering possible completions as part of programmable completion.
@item nullglob
@@ -6864,8 +6899,6 @@ expansion of the special parameters @samp{@@} and @samp{*}.
@code{$@{@var{name}[@var{subscript}]@}}.
If @var{subscript} is @samp{@@} or
@samp{*}, the expansion is the number of elements in the array.
Referencing an array variable without a subscript is equivalent to
referencing with a subscript of 0.
If the @var{subscript}
used to reference an element of an indexed array
evaluates to a number less than zero, it is
@@ -6873,6 +6906,11 @@ interpreted as relative to one greater than the maximum index of the array,
so negative indices count back from the end of the array,
and an index of -1 refers to the last element.
Referencing an array variable without a subscript is equivalent to
referencing with a subscript of 0.
Any reference to a variable using a valid subscript is legal, and
@code{bash} will create an array if necessary.
An array variable is considered set if a subscript has been assigned a
value. The null string is a valid value.