###################################
#!/usr/local/bin/perl
package Parser;

use 5.008007;
use strict;
use warnings; 

require Exporter;
require DynaLoader;
our @ISA = qw(DynaLoader Exporter);
our %EXPORT_TAGS = ( 'all' => [ qw() ] );
our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } );
our @EXPORT = qw();
our $VERSION = '1.261';
bootstrap Parser $VERSION;

# Preloaded methods go here.
##########################################################
sub new {
    my $class = shift;  $class = ref $class if ref $class;
    my $self = { strip_autos=>0, @_};

    bless $self, $class;
    return $self;
}

sub read {
    my $self = shift;
    my %param = (@_);
    if (!-r $param{filename}) { print "%Error: file not found: $param{filename}, stopped";}
    $self->_read_xs($param{filename}, $param{strip_autos}||$self->{strip_autos});##  error comes 
}
...
#In Parser.XS:
# sub _read_xs {class}
# sub filename {class}
# sub lineno {class}
...

##</code><code>##

int 
_read_xs (CLASS, filename, strip_autos)
SV *CLASS
char *filename
int strip_autos
PROTOTYPE: $$$
CODE:
{
    static int/*bool*/ in_parser = 0;
    if (!SvROK(CLASS)) {
          in_parser = 0;
          croak (" Parser::read() not called as class member") ;
    }
    if (!filename) {
          in_parser = 0;
          croak (" Parser::read() filename=> parameter not passed") ;
    }
    if (in_parser) {
          croak (" Parser::read() called recursively") ;
    }
    in_parser = 1;
    scparse_init (CLASS, filename, strip_autos) ;
    if (!sclex_open (filename)) {
          in_parser = 0;
          croak (" Parser::read() file not found") ;
    }
    scgrammerparse();
    fclose (sclexin);

    /* Emit final tokens */
    scparser_EmitPrefix ();
    if (scParserState.errors) {
          in_parser = 0;
          croak (" Parser::read() detected parse errors");
    }
    in_parser = 0;
    RETVAL = 1;
}
OUTPUT: RETVAL

##</code><code>##

#! /usr/local/bin/perl
use ExtUtils::testlib; 
package Trialparser;
use Parser;
@ISA = qw(Parser);

package main;
my $sp = Trialparser->new();
$sp->read (filename =>'ExParse.sp');

##</code><code>##

Can't locate auto/Trialparser/class.al in @INC (@INC contains: /cygdrive/d/parser/blib/arch /cygdrive/d/parser/blib/lib /usr/lib/perl5/5.8/cygwin /usr/lib/perl5/5.8 /usr/lib/perl5/site_perl/5.8/cygwin /usr/lib/perl5/site_perl/5.8 /usr/lib/perl5/vendor_perl/5.8/cygwin /usr/lib/perl5/vendor_perl/5.8 .) at /cygdrive/d/parser/blib/lib/Parser.pm line 51