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author | Peter Stephenson <pws@users.sourceforge.net> | 2010-11-18 13:57:18 +0000 |
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committer | Peter Stephenson <pws@users.sourceforge.net> | 2010-11-18 13:57:18 +0000 |
commit | 8f20b2361cc2e3911ba67b92f6aa89e7457d17de (patch) | |
tree | b65be3bf863eb33c6118d0b6326be99832049684 /Doc/Zsh/expn.yo | |
parent | 23bdfc7fd2a012d5205ed22d18eb39e41c8fbc95 (diff) | |
download | zsh-8f20b2361cc2e3911ba67b92f6aa89e7457d17de.tar.gz zsh-8f20b2361cc2e3911ba67b92f6aa89e7457d17de.tar.xz zsh-8f20b2361cc2e3911ba67b92f6aa89e7457d17de.zip |
28419: Doc/Zsh/expn.yo, Src/subst.c, Test/D04parameter.ztst:
KSH_ARRAY ${*:0:1} gives $0, etc.
Diffstat (limited to 'Doc/Zsh/expn.yo')
-rw-r--r-- | Doc/Zsh/expn.yo | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Doc/Zsh/expn.yo b/Doc/Zsh/expn.yo index 6f29a8778..416d46407 100644 --- a/Doc/Zsh/expn.yo +++ b/Doc/Zsh/expn.yo @@ -623,6 +623,16 @@ tt(${)var(name)tt(:-)var(word)tt(}) form of substitution; a space may be inserted before the tt(-). Furthermore, neither var(offset) nor var(length) may begin with an alphabetic character or tt(&) as these are used to indicate history-style modifiers. + +For further compatibility with other shells there is a special case +when the tt(KSH_ARRAYS) option is active, as in emulation of +Bourne-style shells. In this case array subscript 0 usually refers to the +first element of the array. However, if the substitution refers to the +positional parameter array, e.g. tt($@) or tt($*), then offset 0 +instead refers to tt($0), offset 1 refers to tt($1), and so on. In +other words, the positional parameter array is effectively extended by +prepending tt($0). Hence tt(${*:0:1}) substitutes tt($0) and +tt(${*:1:1}) substitutes tt($1). ) xitem(tt(${)var(name)tt(/)var(pattern)tt(/)var(repl)tt(})) item(tt(${)var(name)tt(//)var(pattern)tt(/)var(repl)tt(}))( |