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| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | Doc/Zsh/grammar.yo | 21 |
2 files changed, 26 insertions, 1 deletions
@@ -1,3 +1,7 @@ +2010-11-17 Peter Stephenson <pws@csr.com> + + * 28377: Doc/Zsh/grammar.yo: document more alias problems. + 2010-11-14 Clint Adams <clint@zsh.org> * 28411: Completion/Unix/Command/_git: complete submodule @@ -13815,5 +13819,5 @@ ***************************************************** * This is used by the shell to define $ZSH_PATCHLEVEL -* $Revision: 1.5120 $ +* $Revision: 1.5121 $ ***************************************************** diff --git a/Doc/Zsh/grammar.yo b/Doc/Zsh/grammar.yo index 27683fc70..5c803a681 100644 --- a/Doc/Zsh/grammar.yo +++ b/Doc/Zsh/grammar.yo @@ -500,6 +500,27 @@ is too late to expand the newly defined alias. This is often a problem in shell scripts, functions, and code executed with `tt(source)' or `tt(.)'. Consequently, use of functions rather than aliases is recommended in non-interactive code. + +Note also the unhelpful interaction of aliases and function definitions: + +example(alias func='noglob func' +func+LPAR()RPAR() { + echo Do something with $* +}) + +Because aliases are expanded in function defintions, this causes the +following command to be executed: + +example(noglob func+LPAR()RPAR() { + echo Do something with $* +}) + +which defines tt(noglob) as well as tt(func) as functions with the +body given. To avoid this, either quote the name tt(func) or use the +alternative function definition form `tt(function func)'. Ensuring the +alias is defined after the function works but is problematic if the +code fragment might be re-executed. + texinode(Quoting)()(Aliasing)(Shell Grammar) sect(Quoting) cindex(quoting) |