diff options
Diffstat (limited to 'doc/Tcl.n')
| -rw-r--r-- | doc/Tcl.n | 10 |
1 files changed, 9 insertions, 1 deletions
@@ -5,7 +5,7 @@ '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" -'\" RCS: @(#) $Id: Tcl.n,v 1.24 2010/01/13 12:08:30 dkf Exp $ +'\" RCS: @(#) $Id: Tcl.n,v 1.25 2010/11/04 13:51:41 dkf Exp $ '\" .so man.macros .TH Tcl n "8.5" Tcl "Tcl Built-In Commands" @@ -110,6 +110,8 @@ Variable substitution may take any of the following forms: \fIName\fR is the name of a scalar variable; the name is a sequence of one or more characters that are a letter, digit, underscore, or namespace separators (two or more colons). +Letters and digits are \fIonly\fR the standard ASCII ones (\fB0\fR\-\fB9\fR, +\fBA\fR\-\fBZ\fR and \fBa\fR\-\fBz\fR). .TP 15 \fB$\fIname\fB(\fIindex\fB)\fR . @@ -117,6 +119,8 @@ or namespace separators (two or more colons). the name of an element within that array. \fIName\fR must contain only letters, digits, underscores, and namespace separators, and may be an empty string. +Letters and digits are \fIonly\fR the standard ASCII ones (\fB0\fR\-\fB9\fR, +\fBA\fR\-\fBZ\fR and \fBa\fR\-\fBz\fR). Command substitutions, variable substitutions, and backslash substitutions are performed on the characters of \fIindex\fR. .TP 15 @@ -136,6 +140,10 @@ substitutions are performed during the parsing of \fIname\fR. .PP There may be any number of variable substitutions in a single word. Variable substitution is not performed on words enclosed in braces. +.PP +Note that variables may contain character sequences other than those listed +above, but in that case other mechanisms must be used to access them (e.g., +via the \fBset\fR command's single-argument form). .RE .IP "[9] \fBBackslash substitution.\fR" If a backslash |