Re: Syntax changes in 7.2

Here some hacky code to generate diffs of the grammar rules. Maybe it
appears to be usefull:

#! /bin/sh

# shell script to diff grammars
# usage: $0 grammar-old.y grammar-new.y

TMPDIR="/tmp/diffgrammar.$$"

PWD=`pwd`

AWKCODE='
BEGIN { RULE=""; }
/^rule/ {
if ( RULE != $3 ) { print $3" ->"; RULE = $3 };
match($0,/^rule[\ \t]*[0-9]+[\ \t]*[(at)A-Za-z_0-9]+[\ \t]*->[\ \t]*/);
print "\t\t"substr($0,RLENGTH);
}
'
mkdir -p ${TMPDIR}/old ${TMPDIR}/new

cp $1 ${TMPDIR}/old
cp $2 ${TMPDIR}/new

cd ${TMPDIR}/old
bison -v `basename $1`

awk "${AWKCODE}" *.output > grammar.rules

cd ${TMPDIR}/new
bison -v `basename $2`

awk "${AWKCODE}" *.output > grammar.rules

cd ${TMPDIR}
diff -u old/grammar.rules new/grammar.rules

cd ${PWD}
rm -rf ${TMPDIR}

--
Holger Krug
hkrug(at)rationalizer(dot)com