--- search.texi 21 May 2004 00:24:35 +0200 1.44 +++ search.texi 24 Jun 2004 15:19:43 +0200 @@ -977,9 +977,9 @@ What if you want to exchange @samp{x} and @samp{y}: replace every @samp{x} with a @samp{y} and vice versa? You can do it this way: @example -M-x query-replace @key{RET} x @key{RET} @@TEMP@@ @key{RET} -M-x query-replace @key{RET} y @key{RET} x @key{RET} -M-x query-replace @key{RET} @@TEMP@@ @key{RET} y @key{RET} +M-x replace-string @key{RET} x @key{RET} @@TEMP@@ @key{RET} +M-< M-x replace-string @key{RET} y @key{RET} x @key{RET} +M-< M-x replace-string @key{RET} @@TEMP@@ @key{RET} y @key{RET} @end example @noindent @@ -1016,6 +1016,49 @@ @noindent performs the inverse transformation. + You can also use arbitrary Lisp expressions evaluated at replacement +time by placing @samp{\,} before them in the replacement string. Inside +of those expressions, the symbols @samp{\&} and @address@hidden refer to +match and submatch strings like described above (a submatch not matching +anything will be @samp{nil}), and @samp{\&#} and @address@hidden to +those strings converted to numbers. @samp{\#} is short for address@hidden, the number of already completed replacements. +This particular shorthand can also be used outside of @samp{\,}. + + Repeating our example to exchange @samp{x} and @samp{y}, we can thus +do it also this way: + address@hidden +M-x replace-regexp @key{RET} \(x\)\|y @key{RET} +\,(if \1 "y" "x") @key{RET} address@hidden example + + Another feature you can use in the replacement string of Regexp +commands is @samp{\?}. In that case you will be allowed to edit the +replacement string at the given position before the replacement gets +performed. Lisp style replacements have already been done before address@hidden is executed. For example, + address@hidden +M-x replace-regexp @key{RET} address@hidden @key{RET} +\&address@hidden:address@hidden @key{RET} address@hidden example + address@hidden +will add labels starting with @address@hidden:address@hidden to occurences of address@hidden@{}, but letting you edit each replacement before +performing it. If you want labels starting at 1, use @samp{\,(1+ \#)} +instead of @samp{\#}. + +As another example, to add consecutively numbered strings like address@hidden to column 73 to~80 (unless they are already occupied), +you can use + address@hidden +M-x replace-regexp @key{RET} address@hidden,address@hidden @key{RET} +\,(format "%-72sABC%05d" \& \#) @key{RET} address@hidden example + @node Replacement and Case, Query Replace, Regexp Replace, Replace @subsection Replace Commands and Case @@ -1126,9 +1169,8 @@ @item ^ to go back to the position of the previous occurrence (or what used to -be an occurrence), in case you changed it by mistake. This works by -popping the mark ring. Only one @kbd{^} in a row is meaningful, because -only one previous replacement position is kept during @code{query-replace}. +be an occurrence), in case you changed it by mistake or want to +reexamine it. @item C-r to enter a recursive editing level, in case the occurrence needs to be