diff options
Diffstat (limited to 'Doc/Zsh')
| -rw-r--r-- | Doc/Zsh/expn.yo | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/Doc/Zsh/expn.yo b/Doc/Zsh/expn.yo index ebb95a833..7baa42b8c 100644 --- a/Doc/Zsh/expn.yo +++ b/Doc/Zsh/expn.yo @@ -486,7 +486,7 @@ is set to tt(LPAR())var(a b c)tt(RPAR()), are substituted with Internally, each such expansion is converted into the equivalent list for brace expansion. E.g., tt(${^var}) becomes tt({$var[1],$var[2],)...tt(}), and is processed as described in -noderef(Brace Expansion) above. +noderef(Brace Expansion) below. If word splitting is also in effect the tt($var[)var(N)tt(]) may themselves be split into different list elements. @@ -948,6 +948,14 @@ In that case, it is expanded to a sorted list of the individual characters between the braces, in the manner of a search set. `tt(-)' is treated specially as in a search set, but `tt(^)' or `tt(!)' as the first character is treated normally. + +Note that brace expansion is not part of filename generation (globbing); an +expression such as tt(*/{foo,bar}) is split into two separate words +tt(*/foo) and tt(*/bar) before filename generation takes place. In +particular, note that this is liable to produce a `no match' error if +em(either) of the two expressions does not match; this is to be contrasted +with tt(*/(foo|bar)), which is treated as a single pattern but otherwise +has similar effects. texinode(Filename Expansion)(Filename Generation)(Brace Expansion)(Expansion) sect(Filename Expansion) cindex(filename expansion) @@ -1099,9 +1107,9 @@ If the tt(KSH_GLOB) option is set, then a the `tt(LPAR())' is treated specially, as detailed below. The option tt(SH_GLOB) prevents bare parentheses from being used in this way, though the tt(KSH_GLOB) option is still available. -Note that grouping cannot currently extend over multiple directories: -a `tt(/)' separating a directory terminates processing of the current -group; processing resumes after the end of the group. +Note that grouping cannot extend over multiple directories: it is an error +to have a `tt(/)' within a group (this only applies for patterns which +match filenames). ) item(var(x)tt(|)var(y))( Matches either var(x) or var(y). @@ -1290,7 +1298,10 @@ subsect(Recursive Globbing) A pathname component of the form `tt(LPAR())var(foo)tt(/RPAR()#)' matches a path consisting of zero or more directories matching the pattern var(foo). -As a shorthand, `tt(**/)' is equivalent to `tt((*/)#)'. + +As a shorthand, `tt(**/)' is equivalent to `tt((*/)#)'; note that this +therefore matches files in the current directory as well as +subdirectories. Thus: example(ls (*/)#bar) @@ -1299,8 +1310,11 @@ or example(ls **/bar) -does a recursive directory search for files named `tt(bar)', not following -symbolic links. To follow links, use `tt(***/)'. +does a recursive directory search for files named `tt(bar)' (potentially +including the file `tt(bar)' in the current directory), not following +symbolic links. To follow links, use `tt(***/)'. Neither of these can be +combined with other forms of globbing within the same filename segment; in +that case, the `tt(*)' operators revert to their usual effect. subsect(Glob Qualifiers) cindex(globbing, qualifiers) cindex(qualifiers, globbing) |