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    Copyright
    Preface
    Pt. I. Getting Started
    Pt. II. Language Basics
    Pt. III. Modules
    Ch. 7. Packages, Modules, and Objects
    Ch. 8. Standard Modules
    AnyDBM_File
    Attribute::Handlers
    attributes
    attrs
    AutoLoader
    AutoSplit
    autouse
    B
    B::Asmdata
    B::Assembler
    B::Bblock
    B::Bytecode
    B::C
    B::CC
    B::Concise
    B::Debug
    B::Deparse
    B::Disassembler
    B::Lint
    B::Showlex
    B::Stackobj
    B::Terse
    B::Xref
    base
    Benchmark
    bigint
    bignum
    bigrat
    blib
    bytes
    ByteLoader
    Carp
    CGI
    CGI::Apache
    CGI::Carp
    CGI::Cookie
    CGI::Fast
    CGI::Pretty
    CGI::Push
    CGI::Switch
    charnames
    Class::ISA
    Class::Struct
    Config
    constant
    CPAN
    CPAN::FirstTime
    CPAN::Nox
    Cwd
    Data::Dumper
    DB
    DB_File
    Devel::DProf
    Devel::PPPort
    Devel::SelfStubber
    diagnostics
    Digest
    Digest::MD5
    DirHandle
    Dumpvalue
    DynaLoader
    encoding
    English
    Env
    Errno
    Exporter
    ExtUtils::Command
    ExtUtils::Command::MM
    ExtUtils::Constant
    ExtUtils::Embed
    ExtUtils::Install
    ExtUtils::Installed
    ExtUtils::Liblist
    ExtUtils::MakeMaker
    ExtUtils::Manifest
    ExtUtils::Miniperl
    ExtUtils::Mkbootstrap
    ExtUtils::Mksymlists
    ExtUtils::MM
    ExtUtils::MM_Any
    ExtUtils::MM_BeOS
    ExtUtils::MM_DOS
    ExtUtils::MM_NW5
    ExtUtils::MM_OS2
    ExtUtils::MM_Unix
    ExtUtils::MM_UWIN
    ExtUtils::MM_VMS
    ExtUtils::MM_Win32
    ExtUtils::MY
    ExtUtils::Packlist
    ExtUtils::testlib
    Fatal
    Fcntl
    fields
    File::Basename
    File::CheckTree
    File::Compare
    File::Copy
    File::DosGlob
    File::Find
    File::Path
    File::Spec
    File::Spec::Cygwin
    File::Spec::Mac
    File::Spec::OS2
    File::Spec::Unix
    File::Spec::VMS
    File::Spec::Win32
    File::stat
    File::Temp
    FileCache
    FileHandle
    Filter::Simple
    Filter::Util::Call
    FindBin
    GDBM_File
    Getopt::Long
    Getopt::Std
    Hash::Util
    I18N::Collate
    I18N::Langinfo
    I18N::LangTags
    I18N::LangTags::List
    if
    integer
    IO
    IO::File
    IO::Handle
    IO::Pipe
    IO::Seekable
    IO::Select
    IO::Socket
    IPC::Msg
    IPC::Open2
    IPC::Open3
    IPC::Semaphore
    IPC::SysV
    less
    lib
    List::Util
    locale
    Math::BigFloat
    Math::BigInt
    Math::BigInt::Calc
    Math::BigRat
    Math::Complex
    Math::Trig
    MIME::Base64
    MIME::QuotedPrint
    NDBM_File
    Net::Cmd
    Net::Config
    Net::Domain
    Net::FTP
    Net::hostent
    Net::netent
    Net::Netrc
    Net::NNTP
    Net::Ping
    Net::POP3
    Net::protoent
    Net::servent
    Net::SMTP
    Net::Time
    O
    ODBM_File
    Opcode
    ops
    overload
    Method
    Overloaded
    StrVal
    PerlIO
    PerlIO::Scalar
    PerlIO::Via
    Pod::Functions
    Pod::Html
    Pod::ParseLink
    Pod::Text
    POSIX
    re
    Safe
    Scalar::Util
    SDBM_File
    Search::Dict
    SelectSaver
    SelfLoader
    Shell
    sigtrap
    Socket
    sort
    Storable
    strict
    subs
    Switch
    Symbol
    Sys::Hostname
    Sys::Syslog
    Term::Cap
    Term::Complete
    Term::ReadLine
    Test
    Test::Builder
    Test::Harness
    Test::More
    Test::Simple
    Text::Abbrev
    Text::Balanced
    Text::ParseWords
    Text::Soundex
    Text::Tabs
    Text::Wrap
    Thread
    Thread::Queue
    Thread::Semaphore
    Thread::Signal
    Thread::Specific
    Tie::Array, Tie::StdArray
    Tie::File
    Tie::Handle
    Tie::Hash
    Tie::Memoize
    Tie::RefHash
    Tie::Scalar
    Tie::SubstrHash
    Time::gmtime
    Time::HiRes
    Time::Local
    Time::localtime
    Time::tm
    UNIVERSAL
    User::grent
    User::pwent
    utf8
    vars
    vmsish
    XS::Typemap
    Pt. IV. CGI
    Pt. V. Databases
    Pt. VI. XML and SOAP
    Pt. VII. Network Programming
    Pt. VIII. LWP
    Pt. IX. Perl/Tk
    Pt. X. Win32
    Colophon
    Index
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    Help

    8.169. overload

    Lets you substitute class methods or your own subroutines for standard Perl operators. For example, the code:

    package Number;
use overload
    "+"  => \add,
    "*=" => "muas";


      

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