#!/usr/bin/perl
## Licensed under the terms of http://www.apache.org/licenses/LICENSE-2.0

# Extract tokens (will need more editting)

$/ = undef ;
$_ = <> ;
s!//.*!!g ;

# Not greedy to find end brace
@t = m/TOKEN\s*(?:\[IGNORE_CASE\])?\s*:\s*\n\{(.*?)\n\}/sg ;

#{\s*([^{}]*)}/sg ;

# Fixups:

for $t (@t)
{
    $t =~ s/\r//g ;

    #print "\nTEXT:\nT:",$t,":\n" ;


    @s = split(/\n\|/,$t) ;
    for $s (@s)
    {
	($name, $rule) = split(/:/,$s,2) ;

	## Leading < and excess whitespace
	$name =~ s/^\s*\<\s*// ;
	$name =~ s/\s+$// ;
	
	## Trailing > and excess whitespace
	$rule =~ s/^\s+// ;
	$rule =~ s/\s*\>\s*$// ;

	$rule =~ s/\|\s*\n\s*/\|/sg ;
	$rule =~ s/\n\s*\|/\|/sg ;

## 	print "NAME: /",$name , "/\n" ;
## 	print "-->   ", $rule , "\n" ;

	$spc = ' ' x (10-length($name)) ;

	print "<",$name,">", $spc, " ::= ",$rule,"\n" ;
    }
}