parser: better compatibility with 'sed' script

Signed-off-by: Jean-Sebastien Gelinas <calestar@gmail.com>
Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/src/parser/prescc.sh b/src/parser/prescc.sh
index fba7063..d82fe6f 100755 (executable)
--- a/src/parser/prescc.sh
+++ b/src/parser/prescc.sh
@@ -1,6 +1,7 @@
 # This file is part of NIT ( http://www.nitlanguage.org ).
 #
 # Copyright 2009 Jean Privat <jean@pryen.org>
+# Copyright 2009 Jean-Sebastien Gelinas <calestar@gmail.com>
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -66,11 +67,28 @@ for token in `perl -ne 'if (/\~(\w+)/ && !$found{$1}) {print "$1\n"; $found{$1}=
 do
        echo "Parameter ~$token"
        # first, sed starts from first line to the AST line and removes ~xxx and !xxx
-       sed -n -e "1,/^Abstract Syntax Tree/{/^Abstract Syntax Tree/b;s/[\~!]$token//g;p}" "$outfile" > "$tmpfile"
+       sed -n -e "
+               1,/^Abstract Syntax Tree/{
+                       /^Abstract Syntax Tree/b
+                       s/[\~!]$token//g
+                       p
+               }
+       " "$outfile" > "$tmpfile"
        # second, sed clones ~xxx parametrized productions, substitute ~xxx with _xxx and delete !xxx lines
-       sed -n -e "/\~$token/,/;/{s/\~$token/_$token/g;/!$token/d;p}" "$outfile" >> "$tmpfile"
+       sed -n -e "
+               /\~$token/,/;/{
+                       s/\~$token/_$token/g
+                       /!$token/d
+                       p
+               }
+       " "$outfile" >> "$tmpfile"
        # third, sed continues fron AST line to last line and remove ~xxx and !xxx
-       sed -n -e "/^Abstract Syntax Tree/,\${s/[\~!]$token//g;p}" "$outfile" >> "$tmpfile"
+       sed -n -e "
+               /^Abstract Syntax Tree/,\${
+                       s/[\~!]$token//g
+                       p
+               }
+       " "$outfile" >> "$tmpfile"
        mv "$tmpfile" "$outfile"
 done