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commit bash-20180713 snapshot

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Chet Ramey
2018-07-18 10:23:04 -04:00
parent a078e04c3d
commit 96efdbb5b4
16 changed files with 106 additions and 27 deletions
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doc/bashref.texi
+7 -6
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@@ -1030,7 +1030,8 @@ to be matched as a string.
An additional binary operator, @samp{=~}, is available, with the same
precedence as @samp{==} and @samp{!=}.
When it is used, the string to the right of the operator is considered
an extended regular expression and matched accordingly (as in @i{regex}3)).
a @sc{POSIX} extended regular expression and matched accordingly
(as in @i{regex}3)).
The return value is 0 if the string matches
the pattern, and 1 otherwise.
If the regular expression is syntactically incorrect, the conditional
@@ -1973,11 +1974,11 @@ interpreted as part of its name.
If the first character of @var{parameter} is an exclamation point (!),
and @var{parameter} is not a @var{nameref},
it introduces a level of variable indirection.
Bash uses the value of the variable formed from the rest of
@var{parameter} as the name of the variable; this variable is then
expanded and that value is used in the rest of the substitution, rather
than the value of @var{parameter} itself.
it introduces a level of indirection.
Bash uses the value formed by expanding the rest of
@var{parameter} as the new @var{parameter}; this is then
expanded and that value is used in the rest of the expansion, rather
than the expansion of the original @var{parameter}.
This is known as @code{indirect expansion}.
The value is subject to tilde expansion,
parameter expansion, command substitution, and arithmetic expansion.