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document more differences to ksh93; here: static vs dynamic scoping

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tg 2009-09-05 17:12:49 +00:00
parent 4a4be7d313
commit 574d6725aa
1 changed files with 8 additions and 2 deletions
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mksh.1
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@ -1,4 +1,4 @@
.\" $MirOS: src/bin/mksh/mksh.1,v 1.179 2009/08/30 21:02:00 tg Exp $ .\" $MirOS: src/bin/mksh/mksh.1,v 1.180 2009/09/05 17:12:49 tg Exp $
.\" $OpenBSD: ksh.1,v 1.129 2009/05/28 06:09:06 jmc Exp $ .\" $OpenBSD: ksh.1,v 1.129 2009/05/28 06:09:06 jmc Exp $
.\"- .\"-
.\" Copyright © 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 .\" Copyright © 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
@ -48,7 +48,7 @@
.el .xD \\$1 \\$2 \\$3 \\$4 \\$5 \\$6 \\$7 \\$8 .el .xD \\$1 \\$2 \\$3 \\$4 \\$5 \\$6 \\$7 \\$8
.. ..
.\"- .\"-
.Dd $Mdocdate: August 30 2009 $ .Dd $Mdocdate: September 5 2009 $
.Dt MKSH 1 .Dt MKSH 1
.Os MirBSD .Os MirBSD
.Sh NAME .Sh NAME
@ -2454,6 +2454,12 @@ assignments made inside functions are visible after the function completes.
If this is not the desired effect, the If this is not the desired effect, the
.Ic typeset .Ic typeset
command can be used inside a function to create a local parameter. command can be used inside a function to create a local parameter.
Note that
.At
.Nm ksh93
uses static scoping (one global scope, one local scope per function), whereas
.Nm mksh
uses dynamic scoping (nested scopes of varying locality).
Note that special parameters (e.g.\& Note that special parameters (e.g.\&
.Ic \&$$ , $! ) .Ic \&$$ , $! )
can't be scoped in this way. can't be scoped in this way.