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#!/usr/bin/perl
$integer = '[+-]?[0-9]+';
$real = '[+-]?[0-9]+\.[0-9]+';
$RANGE = '(\.\.)(\.)?';
$PLUMIN = q(\'\+\-\');
$FLOAT = "(($integer)|($real))([eE]($integer))?";
$EXTENSION = '<|>|~';
$boundary = "($EXTENSION)?$FLOAT";
$deviation = $FLOAT;
$rule_1 = $boundary . $PLUMIN . $deviation;
$rule_2 = $boundary . $RANGE . $boundary;
$rule_3 = $boundary . $RANGE;
$rule_4 = $RANGE . $boundary;
$rule_5 = $boundary;
print "$rule_5\n";
while (<>) {
# s/ +//g;
if ( /^($rule_1)$/ ) {
print;
}
elsif ( /^($rule_2)$/ ) {
print;
}
elsif ( /^($rule_3)$/ ) {
print;
}
elsif ( /^($rule_4)$/ ) {
print;
}
elsif ( /^($rule_5)$/ ) {
print;
}
else {
print STDERR "error in $_\n";
}
}
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