diff options
Diffstat (limited to 'doc/re_syntax.n')
| -rw-r--r-- | doc/re_syntax.n | 42 |
1 files changed, 16 insertions, 26 deletions
diff --git a/doc/re_syntax.n b/doc/re_syntax.n index cb5e32a..de584c0 100644 --- a/doc/re_syntax.n +++ b/doc/re_syntax.n @@ -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: re_syntax.n,v 1.6 2005/01/05 16:38:54 dkf Exp $ +'\" RCS: @(#) $Id: re_syntax.n,v 1.7 2005/04/06 09:34:04 dkf Exp $ '\" .so man.macros .TH re_syntax n "8.1" Tcl "Tcl Built-In Commands" @@ -48,7 +48,7 @@ an empty branch matches the empty string. .PP A quantified atom is an \fIatom\fR possibly followed by a single \fIquantifier\fR. -Without a quantifier, it matches a match for the atom. +Without a quantifier, it matches a single match for the atom. The quantifiers, and what a so-quantified atom matches, are: .RS 2 @@ -85,43 +85,33 @@ permissible values from 0 to 255 inclusive. .PP An atom is one of: .RS 2 -.TP 6 -\fB(\fIre\fB)\fR -(where \fIre\fR is any regular expression) matches a match for -\fIre\fR, with the match noted for possible reporting -.TP -\fB(?:\fIre\fB)\fR +.IP \fB(\fIre\fB)\fR 6 +matches a match for \fIre\fR (\fIre\fR is any regular expression) with +the match noted for possible reporting +.IP \fB(?:\fIre\fB)\fR as previous, but does no reporting (a ``non-capturing'' set of parentheses) -.TP -\fB()\fR +.IP \fB()\fR matches an empty string, noted for possible reporting -.TP -\fB(?:)\fR +.IP \fB(?:)\fR matches an empty string, without reporting -.TP -\fB[\fIchars\fB]\fR +.IP \fB[\fIchars\fB]\fR a \fIbracket expression\fR, matching any one of the \fIchars\fR (see \fBBRACKET EXPRESSIONS\fR for more detail) -.TP -\fB.\fR +.IP \fB.\fR matches any single character -.TP -\fB\e\fIk\fR -(where \fIk\fR is a non-alphanumeric character) matches that character -taken as an ordinary character, e.g. \e\e matches a backslash +.IP \fB\e\fIk\fR +matches the non-alphanumeric character \fIk\fR +taken as an ordinary character, e.g. \fB\e\e\fR matches a backslash character -.TP -\fB\e\fIc\fR +.IP \fB\e\fIc\fR where \fIc\fR is alphanumeric (possibly followed by other characters), an \fIescape\fR (AREs only), see \fBESCAPES\fR below -.TP -\fB{\fR +.IP \fB{\fR when followed by a character other than a digit, matches the left-brace character `\fB{\fR'; when followed by a digit, it is the beginning of a \fIbound\fR (see above) -.TP -\fIx\fR +.IP \fIx\fR where \fIx\fR is a single character with no other significance, matches that character. .RE |