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#!/usr/bin/perl
use strict;
use warnings;
my $integer = '[+-]?[0-9]+';
my $real = '[+-]?[0-9]+\.[0-9]+';
my $RANGE = '(\.\.)(\.)?';
my $PLUMIN = q(\'\+\-\');
my $FLOAT = "(($integer)|($real))([eE]($integer))?";
my $EXTENSION = '<|>|~';
my $boundary = "($EXTENSION)?$FLOAT";
my $deviation = $FLOAT;
my $rule_1 = $boundary . $PLUMIN . $deviation;
my $rule_2 = $boundary . $RANGE . $boundary;
my $rule_3 = $boundary . $RANGE;
my $rule_4 = $RANGE . $boundary;
my $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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