#!/usr/bin/perl

=begin

   Functions for SCALARs or strings
        "chomp", "chop", "chr", "crypt", "fc", "hex", "index", "lc",
        "lcfirst", "length", "oct", "ord", "pack", "q//", "qq//", "reverse",
        "rindex", "sprintf", "substr", "tr///", "uc", "ucfirst", "y///"

        "fc" is available only if the "fc" feature is enabled or if it is
        prefixed with "CORE::". The "fc" feature is enabled automatically
        with a "use v5.16" (or higher) declaration in the current scope.

    Regular expressions and pattern matching
        "m//", "pos", "qr//", "quotemeta", "s///", "split", "study"

    Numeric functions
        "abs", "atan2", "cos", "exp", "hex", "int", "log", "oct", "rand",
        "sin", "sqrt", "srand"

    Functions for real @ARRAYs
        "each", "keys", "pop", "push", "shift", "splice", "unshift",
        "values"

    Functions for list data
        "grep", "join", "map", "qw//", "reverse", "sort", "unpack"

    Functions for real %HASHes
        "delete", "each", "exists", "keys", "values"

    Input and output functions
        "binmode", "close", "closedir", "dbmclose", "dbmopen", "die", "eof",
        "fileno", "flock", "format", "getc", "print", "printf", "read",
        "readdir", "readline", "rewinddir", "say", "seek", "seekdir",
        "select", "syscall", "sysread", "sysseek", "syswrite", "tell",
        "telldir", "truncate", "warn", "write"

        "say" is available only if the "say" feature is enabled or if it is
        prefixed with "CORE::". The "say" feature is enabled automatically
        with a "use v5.10" (or higher) declaration in the current scope.

    Functions for fixed-length data or records
        "pack", "read", "syscall", "sysread", "sysseek", "syswrite",
        "unpack", "vec"

    Functions for filehandles, files, or directories
        "-*X*", "chdir", "chmod", "chown", "chroot", "fcntl", "glob",
        "ioctl", "link", "lstat", "mkdir", "open", "opendir", "readlink",
        "rename", "rmdir", "select", "stat", "symlink", "sysopen", "umask",
        "unlink", "utime"

    Keywords related to the control flow of your Perl program
        "break", "caller", "continue", "die", "do", "dump", "eval",
        "evalbytes", "exit", "__FILE__", "goto", "last", "__LINE__", "next",
        "__PACKAGE__", "redo", "return", "sub", "__SUB__", "wantarray"

   Miscellaneous functions
        "defined", "formline", "lock", "prototype", "reset", "scalar",
        "undef"

    Functions for processes and process groups
        "alarm", "exec", "fork", "getpgrp", "getppid", "getpriority",
        "kill", "pipe", "qx//", "readpipe", "setpgrp", "setpriority",
        "sleep", "system", "times", "wait", "waitpid"

    Keywords related to Perl modules
        "do", "import", "no", "package", "require", "use"

    Keywords related to classes and object-orientation
        "bless", "dbmclose", "dbmopen", "package", "ref", "tie", "tied",
        "untie", "use"

    Low-level socket functions
        "accept", "bind", "connect", "getpeername", "getsockname",
        "getsockopt", "listen", "recv", "send", "setsockopt", "shutdown",
        "socket", "socketpair"

    System V interprocess communication functions
        "msgctl", "msgget", "msgrcv", "msgsnd", "semctl", "semget", "semop",
        "shmctl", "shmget", "shmread", "shmwrite"

    Fetching user and group info
        "endgrent", "endhostent", "endnetent", "endpwent", "getgrent",
        "getgrgid", "getgrnam", "getlogin", "getpwent", "getpwnam",
        "getpwuid", "setgrent", "setpwent"

    Fetching network info
        "endprotoent", "endservent", "gethostbyaddr", "gethostbyname",
        "gethostent", "getnetbyaddr", "getnetbyname", "getnetent",
        "getprotobyname", "getprotobynumber", "getprotoent",
        "getservbyname", "getservbyport", "getservent", "sethostent",
        "setnetent", "setprotoent", "setservent"

=cut