diff options
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/Zsh/cond.yo | 30 | ||||
| -rw-r--r-- | Doc/Zsh/expn.yo | 6 |
2 files changed, 33 insertions, 3 deletions
diff --git a/Doc/Zsh/cond.yo b/Doc/Zsh/cond.yo index 26c0eaa58..d04ceb258 100644 --- a/Doc/Zsh/cond.yo +++ b/Doc/Zsh/cond.yo @@ -196,8 +196,34 @@ where possible. Normal shell expansion is performed on the var(file), var(string) and var(pattern) arguments, but the result of each expansion is constrained to be a single word, similar to the effect of double quotes. -Filename generation is not performed on any form of argument to conditions. -However, pattern metacharacters are active for the var(pattern) arguments; + +Filename generation is not performed on any form of argument to +conditions. However, it can be forced in any case where normal shell +expansion is valid and when the option tt(EXTENDED_GLOB) is in effect by +using an explicit glob qualifier of the form tt(LPAR()#q+RPAR()) at the +end of the string. A normal glob qualifier expression may appear +between the `tt(q)' and the closing parenthesis; if none appears the +expression has no effect beyond causing filename generation. The +results of filename generation are joined together to form a single +word, as with the results of other forms of expansion. + +This special use of filename generation is only available with the +tt([[) syntax. If the condition occurs within the tt([) or tt(test) +builtin commands then globbing occurs instead as part of normal command +line expansion before the condition is evaluated. In this case it may +generate multiple words which are likely to confuse the syntax of the +test command. + +For example, + +tt([[ -n file*(#qN) ]]) + +produces status zero if and only if there is at least one file in the +current directory beginning with the string `tt(file)'. The globbing +qualifier tt(N) ensures that the expression is empty if there is +no matching file. + +Pattern metacharacters are active for the var(pattern) arguments; the patterns are the same as those used for filename generation, see ifzman(\ zmanref(zshexpn)\ diff --git a/Doc/Zsh/expn.yo b/Doc/Zsh/expn.yo index de0f454c4..6de73ea93 100644 --- a/Doc/Zsh/expn.yo +++ b/Doc/Zsh/expn.yo @@ -2305,7 +2305,11 @@ contained within it are balanced; appearance of `tt(|)', `tt(LPAR())' or recognised in this form even if a bare glob qualifier exists at the end of the pattern, for example `tt(*(#q*)(.))' will recognise executable regular files if both options are set; however, mixed syntax should probably be -avoided for the sake of clarity. +avoided for the sake of clarity. Note that within conditions using the +`tt([[)' form the presence of a parenthesised expression +tt(LPAR()#q...+RPAR()) at the end of a string indicates that globbing +should be performed; the expression may include glob qualifiers, but +it is also valid if it is simply tt(LPAR()#q+RPAR()). A qualifier may be any one of the following: |