Make lc/uc/lcfirst/ucfirst warn when passed undef.

[p5sagit/p5-mst-13.2.git] / t / lib / warnings / op

  op.c		AOK

     Found = in conditional, should be ==
	1 if $a = 1 ;

     Use of implicit split to @_ is deprecated
	split ;

     Use of implicit split to @_ is deprecated
	$a = split ;

     Useless use of time in void context
     Useless use of a variable in void context
     Useless use of a constant in void context
	time ;
	$a ;
	"abc"

     Useless use of sort in scalar context
	my $x = sort (2,1,3);

     Applying %s to %s will act on scalar(%s)
	my $a ; my @a = () ; my %a = () ; my $b = \@a ; my $c = \%a ;
	@a =~ /abc/ ;
	@a =~ s/a/b/ ;
	@a =~ tr/a/b/ ;
	@$b =~ /abc/ ;
	@$b =~ s/a/b/ ;
	@$b =~ tr/a/b/ ;
	%a =~ /abc/ ;
	%a =~ s/a/b/ ;
	%a =~ tr/a/b/ ;
	%$c =~ /abc/ ;
	%$c =~ s/a/b/ ;
	%$c =~ tr/a/b/ ;


     Parentheses missing around "my" list at -e line 1.
       my $a, $b = (1,2);
 
     Parentheses missing around "local" list at -e line 1.
       local $a, $b = (1,2);
 
     Bareword found in conditional at -e line 1.
       use warnings 'bareword'; my $x = print(ABC || 1);
 
     Value of %s may be \"0\"; use \"defined\" 
	$x = 1 if $x = <FH> ;
	$x = 1 while $x = <FH> ;

     Subroutine fred redefined at -e line 1.
       sub fred{1;} sub fred{1;}
 
     Constant subroutine %s redefined 
        sub fred() {1;} sub fred() {1;}
 
     Format FRED redefined at /tmp/x line 5.
       format FRED =
       .
       format FRED =
       .
 
     Array @%s missing the @ in argument %d of %s() 
	push fred ;
 
     Hash %%%s missing the %% in argument %d of %s() 
	keys joe ;
 
     Statement unlikely to be reached
     	(Maybe you meant system() when you said exec()?
 	exec "true" ; my $a

     defined(@array) is deprecated
     	(Maybe you should just omit the defined()?)
	my @a ; defined @a ;
	defined (@a = (1,2,3)) ;

     defined(%hash) is deprecated
     	(Maybe you should just omit the defined()?)
	my %h ; defined %h ;
    
     /---/ should probably be written as "---"
        join(/---/, @foo);

    %s() called too early to check prototype		[Perl_peep]
        fred() ; sub fred ($$) {}


    Package `%s' not found (did you use the incorrect case?)

    Use of /g modifier is meaningless in split

    Possible precedence problem on bitwise %c operator	[Perl_ck_bitop]

    Mandatory Warnings 
    ------------------
    Prototype mismatch:		[cv_ckproto]
        sub fred() ;
        sub fred($) {}

    Runaway prototype		[newSUB]	TODO
    oops: oopsAV		[oopsAV]	TODO
    oops: oopsHV		[oopsHV]	TODO
    
__END__
# op.c
use warnings 'syntax' ;
1 if $a = 1 ;
no warnings 'syntax' ;
1 if $a = 1 ;
EXPECT
Found = in conditional, should be == at - line 3.
########
# op.c
use warnings 'deprecated' ;
split ;
no warnings 'deprecated' ;
split ;
EXPECT
Use of implicit split to @_ is deprecated at - line 3.
########
# op.c
use warnings 'deprecated' ;
$a = split ;
no warnings 'deprecated' ;
$a = split ;
EXPECT
Use of implicit split to @_ is deprecated at - line 3.
########
# op.c
use warnings 'deprecated';
my (@foo, %foo);
%main::foo->{"bar"};
%foo->{"bar"};
@main::foo->[23];
@foo->[23];
$main::foo = {}; %$main::foo->{"bar"};
$foo = {}; %$foo->{"bar"};
$main::foo = []; @$main::foo->[34];
$foo = []; @$foo->[34];
no warnings 'deprecated';
%main::foo->{"bar"};
%foo->{"bar"};
@main::foo->[23];
@foo->[23];
$main::foo = {}; %$main::foo->{"bar"};
$foo = {}; %$foo->{"bar"};
$main::foo = []; @$main::foo->[34];
$foo = []; @$foo->[34];
EXPECT
Using a hash as a reference is deprecated at - line 4.
Using a hash as a reference is deprecated at - line 5.
Using an array as a reference is deprecated at - line 6.
Using an array as a reference is deprecated at - line 7.
Using a hash as a reference is deprecated at - line 8.
Using a hash as a reference is deprecated at - line 9.
Using an array as a reference is deprecated at - line 10.
Using an array as a reference is deprecated at - line 11.
########
# op.c
use warnings 'void' ; close STDIN ;
1 x 3 ;			# OP_REPEAT
			# OP_GVSV
wantarray ; 		# OP_WANTARRAY
			# OP_GV
			# OP_PADSV
			# OP_PADAV
			# OP_PADHV
			# OP_PADANY
			# OP_AV2ARYLEN
ref ;			# OP_REF
\@a ;			# OP_REFGEN
\$a ;			# OP_SREFGEN
defined $a ;		# OP_DEFINED
hex $a ;		# OP_HEX
oct $a ;		# OP_OCT
length $a ;		# OP_LENGTH
substr $a,1 ;		# OP_SUBSTR
vec $a,1,2 ;		# OP_VEC
index $a,1,2 ;		# OP_INDEX
rindex $a,1,2 ;		# OP_RINDEX
sprintf $a ;		# OP_SPRINTF
$a[0] ;			# OP_AELEM
			# OP_AELEMFAST
@a[0] ;			# OP_ASLICE
#values %a ;		# OP_VALUES
#keys %a ;		# OP_KEYS
$a{0} ;			# OP_HELEM
@a{0} ;			# OP_HSLICE
unpack "a", "a" ;	# OP_UNPACK
pack $a,"" ;		# OP_PACK
join "" ;		# OP_JOIN
(@a)[0,1] ;		# OP_LSLICE
			# OP_ANONLIST
			# OP_ANONHASH
sort(1,2) ;		# OP_SORT
reverse(1,2) ;		# OP_REVERSE
			# OP_RANGE
			# OP_FLIP
(1 ..2) ;		# OP_FLOP
caller ;		# OP_CALLER
fileno STDIN ;		# OP_FILENO
eof STDIN ;		# OP_EOF
tell STDIN ;		# OP_TELL
readlink 1;		# OP_READLINK
time ;			# OP_TIME
localtime ;		# OP_LOCALTIME
gmtime ;		# OP_GMTIME
eval { getgrnam 1 };	# OP_GGRNAM
eval { getgrgid 1 };	# OP_GGRGID
eval { getpwnam 1 };	# OP_GPWNAM
eval { getpwuid 1 };	# OP_GPWUID
prototype "foo";	# OP_PROTOTYPE
$a ~~ $b;		# OP_SMARTMATCH
$a <=> $b;		# OP_NCMP
EXPECT
Useless use of repeat (x) in void context at - line 3.
Useless use of wantarray in void context at - line 5.
Useless use of reference-type operator in void context at - line 12.
Useless use of reference constructor in void context at - line 13.
Useless use of single ref constructor in void context at - line 14.
Useless use of defined operator in void context at - line 15.
Useless use of hex in void context at - line 16.
Useless use of oct in void context at - line 17.
Useless use of length in void context at - line 18.
Useless use of substr in void context at - line 19.
Useless use of vec in void context at - line 20.
Useless use of index in void context at - line 21.
Useless use of rindex in void context at - line 22.
Useless use of sprintf in void context at - line 23.
Useless use of array element in void context at - line 24.
Useless use of array slice in void context at - line 26.
Useless use of hash element in void context at - line 29.
Useless use of hash slice in void context at - line 30.
Useless use of unpack in void context at - line 31.
Useless use of pack in void context at - line 32.
Useless use of join or string in void context at - line 33.
Useless use of list slice in void context at - line 34.
Useless use of sort in void context at - line 37.
Useless use of reverse in void context at - line 38.
Useless use of range (or flop) in void context at - line 41.
Useless use of caller in void context at - line 42.
Useless use of fileno in void context at - line 43.
Useless use of eof in void context at - line 44.
Useless use of tell in void context at - line 45.
Useless use of readlink in void context at - line 46.
Useless use of time in void context at - line 47.
Useless use of localtime in void context at - line 48.
Useless use of gmtime in void context at - line 49.
Useless use of getgrnam in void context at - line 50.
Useless use of getgrgid in void context at - line 51.
Useless use of getpwnam in void context at - line 52.
Useless use of getpwuid in void context at - line 53.
Useless use of subroutine prototype in void context at - line 54.
Useless use of smart match in void context at - line 55.
Useless use of numeric comparison (<=>) in void context at - line 56.
########
# op.c
use warnings 'void' ; close STDIN ;
my $x = sort (2,1,3);
no warnings 'void' ;
$x = sort (2,1,3);
EXPECT
Useless use of sort in scalar context at - line 3.
########
# op.c
no warnings 'void' ; close STDIN ;
1 x 3 ;			# OP_REPEAT
			# OP_GVSV
wantarray ; 		# OP_WANTARRAY
			# OP_GV
			# OP_PADSV
			# OP_PADAV
			# OP_PADHV
			# OP_PADANY
			# OP_AV2ARYLEN
ref ;			# OP_REF
\@a ;			# OP_REFGEN
\$a ;			# OP_SREFGEN
defined $a ;		# OP_DEFINED
hex $a ;		# OP_HEX
oct $a ;		# OP_OCT
length $a ;		# OP_LENGTH
substr $a,1 ;		# OP_SUBSTR
vec $a,1,2 ;		# OP_VEC
index $a,1,2 ;		# OP_INDEX
rindex $a,1,2 ;		# OP_RINDEX
sprintf $a ;		# OP_SPRINTF
$a[0] ;			# OP_AELEM
			# OP_AELEMFAST
@a[0] ;			# OP_ASLICE
#values %a ;		# OP_VALUES
#keys %a ;		# OP_KEYS
$a{0} ;			# OP_HELEM
@a{0} ;			# OP_HSLICE
unpack "a", "a" ;	# OP_UNPACK
pack $a,"" ;		# OP_PACK
join "" ;		# OP_JOIN
(@a)[0,1] ;		# OP_LSLICE
			# OP_ANONLIST
			# OP_ANONHASH
sort(1,2) ;		# OP_SORT
reverse(1,2) ;		# OP_REVERSE
			# OP_RANGE
			# OP_FLIP
(1 ..2) ;		# OP_FLOP
caller ;		# OP_CALLER
fileno STDIN ;		# OP_FILENO
eof STDIN ;		# OP_EOF
tell STDIN ;		# OP_TELL
readlink 1;		# OP_READLINK
time ;			# OP_TIME
localtime ;		# OP_LOCALTIME
gmtime ;		# OP_GMTIME
eval { getgrnam 1 };	# OP_GGRNAM
eval { getgrgid 1 };	# OP_GGRGID
eval { getpwnam 1 };	# OP_GPWNAM
eval { getpwuid 1 };	# OP_GPWUID
prototype "foo";	# OP_PROTOTYPE
EXPECT
########
# op.c
use warnings 'void' ;
for (@{[0]}) { "$_" }		# check warning isn't duplicated
no warnings 'void' ;
for (@{[0]}) { "$_" }		# check warning isn't duplicated
EXPECT
Useless use of string in void context at - line 3.
########
# op.c
use warnings 'void' ;
use Config ;
BEGIN {
    if ( ! $Config{d_telldir}) {
        print <<EOM ;
SKIPPED
# telldir not present
EOM
        exit 
    }
}
telldir 1 ;		# OP_TELLDIR
no warnings 'void' ;
telldir 1 ;		# OP_TELLDIR
EXPECT
Useless use of telldir in void context at - line 13.
########
# op.c
use warnings 'void' ;
use Config ;
BEGIN {
    if ( ! $Config{d_getppid}) {
        print <<EOM ;
SKIPPED
# getppid not present
EOM
        exit 
    }
}
getppid ;		# OP_GETPPID
no warnings 'void' ;
getppid ;		# OP_GETPPID
EXPECT
Useless use of getppid in void context at - line 13.
########
# op.c
use warnings 'void' ;
use Config ;
BEGIN {
    if ( ! $Config{d_getpgrp}) {
        print <<EOM ;
SKIPPED
# getpgrp not present
EOM
        exit 
    }
}
getpgrp ;		# OP_GETPGRP
no warnings 'void' ;
getpgrp ;		# OP_GETPGRP
EXPECT
Useless use of getpgrp in void context at - line 13.
########
# op.c
use warnings 'void' ;
use Config ;
BEGIN {
    if ( ! $Config{d_times}) {
        print <<EOM ;
SKIPPED
# times not present
EOM
        exit 
    }
}
times ;			# OP_TMS
no warnings 'void' ;
times ;			# OP_TMS
EXPECT
Useless use of times in void context at - line 13.
########
# op.c
use warnings 'void' ;
use Config ;
BEGIN {
    if ( ! $Config{d_getprior} or $^O eq 'os2') { # Locks before fixpak22
        print <<EOM ;
SKIPPED
# getpriority not present
EOM
        exit 
    }
}
getpriority 1,2;	# OP_GETPRIORITY
no warnings 'void' ;
getpriority 1,2;	# OP_GETPRIORITY
EXPECT
Useless use of getpriority in void context at - line 13.
########
# op.c
use warnings 'void' ;
use Config ;
BEGIN {
    if ( ! $Config{d_getlogin}) {
        print <<EOM ;
SKIPPED
# getlogin not present
EOM
        exit 
    }
}
getlogin ;			# OP_GETLOGIN
no warnings 'void' ;
getlogin ;			# OP_GETLOGIN
EXPECT
Useless use of getlogin in void context at - line 13.
########
# op.c
use warnings 'void' ;
use Config ; BEGIN {
if ( ! $Config{d_socket}) {
    print <<EOM ;
SKIPPED
# getsockname not present
# getpeername not present
# gethostbyname not present
# gethostbyaddr not present
# gethostent not present
# getnetbyname not present
# getnetbyaddr not present
# getnetent not present
# getprotobyname not present
# getprotobynumber not present
# getprotoent not present
# getservbyname not present
# getservbyport not present
# getservent not present
EOM
    exit 
} }
getsockname STDIN ;	# OP_GETSOCKNAME
getpeername STDIN ;	# OP_GETPEERNAME
gethostbyname 1 ;	# OP_GHBYNAME
gethostbyaddr 1,2;	# OP_GHBYADDR
gethostent ;		# OP_GHOSTENT
getnetbyname 1 ;	# OP_GNBYNAME
getnetbyaddr 1,2 ;	# OP_GNBYADDR
getnetent ;		# OP_GNETENT
getprotobyname 1;	# OP_GPBYNAME
getprotobynumber 1;	# OP_GPBYNUMBER
getprotoent ;		# OP_GPROTOENT
getservbyname 1,2;	# OP_GSBYNAME
getservbyport 1,2;	# OP_GSBYPORT
getservent ;		# OP_GSERVENT

no warnings 'void' ;
getsockname STDIN ;	# OP_GETSOCKNAME
getpeername STDIN ;	# OP_GETPEERNAME
gethostbyname 1 ;	# OP_GHBYNAME
gethostbyaddr 1,2;	# OP_GHBYADDR
gethostent ;		# OP_GHOSTENT
getnetbyname 1 ;	# OP_GNBYNAME
getnetbyaddr 1,2 ;	# OP_GNBYADDR
getnetent ;		# OP_GNETENT
getprotobyname 1;	# OP_GPBYNAME
getprotobynumber 1;	# OP_GPBYNUMBER
getprotoent ;		# OP_GPROTOENT
getservbyname 1,2;	# OP_GSBYNAME
getservbyport 1,2;	# OP_GSBYPORT
getservent ;		# OP_GSERVENT
INIT {
   # some functions may not be there, so we exit without running
   exit;
}
EXPECT
Useless use of getsockname in void context at - line 24.
Useless use of getpeername in void context at - line 25.
Useless use of gethostbyname in void context at - line 26.
Useless use of gethostbyaddr in void context at - line 27.
Useless use of gethostent in void context at - line 28.
Useless use of getnetbyname in void context at - line 29.
Useless use of getnetbyaddr in void context at - line 30.
Useless use of getnetent in void context at - line 31.
Useless use of getprotobyname in void context at - line 32.
Useless use of getprotobynumber in void context at - line 33.
Useless use of getprotoent in void context at - line 34.
Useless use of getservbyname in void context at - line 35.
Useless use of getservbyport in void context at - line 36.
Useless use of getservent in void context at - line 37.
########
# op.c
use warnings 'void' ;
*a ; # OP_RV2GV
$a ; # OP_RV2SV
@a ; # OP_RV2AV
%a ; # OP_RV2HV
no warnings 'void' ;
*a ; # OP_RV2GV
$a ; # OP_RV2SV
@a ; # OP_RV2AV
%a ; # OP_RV2HV
EXPECT
Useless use of a variable in void context at - line 3.
Useless use of a variable in void context at - line 4.
Useless use of a variable in void context at - line 5.
Useless use of a variable in void context at - line 6.
########
# op.c
use warnings 'void' ;
"abc"; # OP_CONST
7 ; # OP_CONST
5 || print "bad\n";	# test OPpCONST_SHORTCIRCUIT
use constant U => undef;
print "boo\n" if U;	# test OPpCONST_SHORTCIRCUIT
$[ = 2; # should not warn
no warnings 'void' ;
"abc"; # OP_CONST
7 ; # OP_CONST
EXPECT
Useless use of a constant in void context at - line 3.
Useless use of a constant in void context at - line 4.
########
# op.c
#
use warnings 'misc' ;
my $a ; my @a = () ; my %a = () ; my $b = \@a ; my $c = \%a ;
@a =~ /abc/ ;
@a =~ s/a/b/ ;
@a =~ tr/a/b/ ;
@$b =~ /abc/ ;
@$b =~ s/a/b/ ;
@$b =~ tr/a/b/ ;
%a =~ /abc/ ;
%a =~ s/a/b/ ;
%a =~ tr/a/b/ ;
%$c =~ /abc/ ;
%$c =~ s/a/b/ ;
%$c =~ tr/a/b/ ;
{
no warnings 'misc' ;
my $a ; my @a = () ; my %a = () ; my $b = \@a ; my $c = \%a ;
@a =~ /abc/ ;
@a =~ s/a/b/ ;
@a =~ tr/a/b/ ;
@$b =~ /abc/ ;
@$b =~ s/a/b/ ;
@$b =~ tr/a/b/ ;
%a =~ /abc/ ;
%a =~ s/a/b/ ;
%a =~ tr/a/b/ ;
%$c =~ /abc/ ;
%$c =~ s/a/b/ ;
%$c =~ tr/a/b/ ;
}
EXPECT
Applying pattern match (m//) to @array will act on scalar(@array) at - line 5.
Applying substitution (s///) to @array will act on scalar(@array) at - line 6.
Applying transliteration (tr///) to @array will act on scalar(@array) at - line 7.
Applying pattern match (m//) to @array will act on scalar(@array) at - line 8.
Applying substitution (s///) to @array will act on scalar(@array) at - line 9.
Applying transliteration (tr///) to @array will act on scalar(@array) at - line 10.
Applying pattern match (m//) to %hash will act on scalar(%hash) at - line 11.
Applying substitution (s///) to %hash will act on scalar(%hash) at - line 12.
Applying transliteration (tr///) to %hash will act on scalar(%hash) at - line 13.
Applying pattern match (m//) to %hash will act on scalar(%hash) at - line 14.
Applying substitution (s///) to %hash will act on scalar(%hash) at - line 15.
Applying transliteration (tr///) to %hash will act on scalar(%hash) at - line 16.
Can't modify private array in substitution (s///) at - line 6, near "s/a/b/ ;"
BEGIN not safe after errors--compilation aborted at - line 18.
########
# op.c
use warnings 'parenthesis' ;
my $a, $b = (1,2);
my @foo,%bar,	$quux; # there's a TAB here
my $x, $y or print;
no warnings 'parenthesis' ;
my $c, $d = (1,2);
EXPECT
Parentheses missing around "my" list at - line 3.
Parentheses missing around "my" list at - line 4.
########
# op.c
use warnings 'parenthesis' ;
our $a, $b = (1,2);
no warnings 'parenthesis' ;
our $c, $d = (1,2);
EXPECT
Parentheses missing around "our" list at - line 3.
########
# op.c
use warnings 'parenthesis' ;
local $a, $b = (1,2);
local *f, *g;
no warnings 'parenthesis' ;
local $c, $d = (1,2);
EXPECT
Parentheses missing around "local" list at - line 3.
Parentheses missing around "local" list at - line 4.
########
# op.c
use warnings 'bareword' ;
print (ABC || 1) ;
no warnings 'bareword' ;
print (ABC || 1) ;
EXPECT
Bareword found in conditional at - line 3.
########
--FILE-- abc

--FILE--
# op.c
use warnings 'misc' ;
open FH, "<abc" ;
$x = 1 if $x = <FH> ;
no warnings 'misc' ;
$x = 1 if $x = <FH> ;
EXPECT
Value of <HANDLE> construct can be "0"; test with defined() at - line 4.
########
# op.c
use warnings 'misc' ;
opendir FH, "." ;
$x = 1 if $x = readdir FH ;
no warnings 'misc' ;
$x = 1 if $x = readdir FH ;
closedir FH ;
EXPECT
Value of readdir() operator can be "0"; test with defined() at - line 4.
########
# op.c
use warnings 'misc' ;
$x = 1 if $x = <*> ;
no warnings 'misc' ;
$x = 1 if $x = <*> ;
EXPECT
Value of glob construct can be "0"; test with defined() at - line 3.
########
# op.c
use warnings 'misc' ;
%a = (1,2,3,4) ;
$x = 1 if $x = each %a ;
no warnings 'misc' ;
$x = 1 if $x = each %a ;
EXPECT
Value of each() operator can be "0"; test with defined() at - line 4.
########
# op.c
use warnings 'misc' ;
$x = 1 while $x = <*> and 0 ;
no warnings 'misc' ;
$x = 1 while $x = <*> and 0 ;
EXPECT
Value of glob construct can be "0"; test with defined() at - line 3.
########
# op.c
use warnings 'misc' ;
opendir FH, "." ;
$x = 1 while $x = readdir FH and 0 ;
no warnings 'misc' ;
$x = 1 while $x = readdir FH and 0 ;
closedir FH ;
EXPECT
Value of readdir() operator can be "0"; test with defined() at - line 4.
########
# op.c
use warnings 'misc';
open FH, "<abc";
($_ = <FH>) // ($_ = 1);
opendir DH, ".";
%a = (1,2,3,4) ;
EXPECT
########
# op.c
use warnings 'redefine' ;
sub fred {}
sub fred {}
no warnings 'redefine' ;
sub fred {}
EXPECT
Subroutine fred redefined at - line 4.
########
# op.c
use warnings 'redefine' ;
sub fred () { 1 }
sub fred () { 1 }
no warnings 'redefine' ;
sub fred () { 1 }
EXPECT
Constant subroutine fred redefined at - line 4.
########
# op.c
no warnings 'redefine' ;
sub fred () { 1 }
sub fred () { 2 }
EXPECT
Constant subroutine fred redefined at - line 4.
########
# op.c
no warnings 'redefine' ;
sub fred () { 1 }
*fred = sub () { 2 };
EXPECT
Constant subroutine main::fred redefined at - line 4.
########
# op.c
use warnings 'redefine' ;
format FRED =
.
format FRED =
.
no warnings 'redefine' ;
format FRED =
.
EXPECT
Format FRED redefined at - line 5.
########
# op.c
use warnings 'deprecated' ;
push FRED;
no warnings 'deprecated' ;
push FRED;
EXPECT
Array @FRED missing the @ in argument 1 of push() at - line 3.
########
# op.c
use warnings 'deprecated' ;
@a = keys FRED ;
no warnings 'deprecated' ;
@a = keys FRED ;
EXPECT
Hash %FRED missing the % in argument 1 of keys() at - line 3.
########
# op.c
BEGIN {
    if ($^O eq 'MacOS') {
	print <<EOM;
SKIPPED
# no exec on Mac OS
EOM
	exit;
    }
}
use warnings 'syntax' ;
exec "$^X -e 1" ; 
my $a
EXPECT
Statement unlikely to be reached at - line 13.
	(Maybe you meant system() when you said exec()?)
########
# op.c
use warnings 'deprecated' ;
my @a; defined(@a);
EXPECT
defined(@array) is deprecated at - line 3.
	(Maybe you should just omit the defined()?)
########
# op.c
use warnings 'deprecated' ;
defined(@a = (1,2,3));
EXPECT
defined(@array) is deprecated at - line 3.
	(Maybe you should just omit the defined()?)
########
# op.c
use warnings 'deprecated' ;
my %h; defined(%h);
EXPECT
defined(%hash) is deprecated at - line 3.
	(Maybe you should just omit the defined()?)
########
# op.c
BEGIN {
    if ($^O eq 'MacOS') {
	print <<EOM;
SKIPPED
# no exec on Mac OS
EOM
	exit;
    }
}
no warnings 'syntax' ;
exec "$^X -e 1" ; 
my $a
EXPECT

########
# op.c
sub fred();
sub fred($) {}
EXPECT
Prototype mismatch: sub main::fred () vs ($) at - line 3.
########
# op.c
$^W = 0 ;
sub fred() ;
sub fred($) {}
{
    no warnings 'prototype' ;
    sub Fred() ;
    sub Fred($) {}
    use warnings 'prototype' ;
    sub freD() ;
    sub freD($) {}
}
sub FRED() ;
sub FRED($) {}
EXPECT
Prototype mismatch: sub main::fred () vs ($) at - line 4.
Prototype mismatch: sub main::freD () vs ($) at - line 11.
Prototype mismatch: sub main::FRED () vs ($) at - line 14.
########
# op.c
use warnings 'syntax' ;
join /---/, 'x', 'y', 'z';
EXPECT
/---/ should probably be written as "---" at - line 3.
########
# op.c [Perl_peep]
use warnings 'prototype' ;
fred() ; 
sub fred ($$) {}
no warnings 'prototype' ;
joe() ; 
sub joe ($$) {}
EXPECT
main::fred() called too early to check prototype at - line 3.
########
# op.c [Perl_newATTRSUB]
--FILE-- abc.pm
use warnings 'void' ;
BEGIN { $| = 1; print "in begin\n"; }
CHECK { print "in check\n"; }
INIT { print "in init\n"; }
END { print "in end\n"; }
print "in mainline\n";
1;
--FILE--
use abc;
delete $INC{"abc.pm"};
require abc;
do "abc.pm";
EXPECT
in begin
in mainline
in check
in init
in begin
Too late to run CHECK block at abc.pm line 3.
Too late to run INIT block at abc.pm line 4.
in mainline
in begin
Too late to run CHECK block at abc.pm line 3.
Too late to run INIT block at abc.pm line 4.
in mainline
in end
in end
in end
########
# op.c [Perl_newATTRSUB]
--FILE-- abc.pm
no warnings 'void' ;
BEGIN { $| = 1; print "in begin\n"; }
CHECK { print "in check\n"; }
INIT { print "in init\n"; }
END { print "in end\n"; }
print "in mainline\n";
1;
--FILE--
require abc;
do "abc.pm";
EXPECT
in begin
in mainline
in begin
in mainline
in end
in end
########
# op.c
my @x;
use warnings 'syntax' ;
push(@x);
unshift(@x);
no warnings 'syntax' ;
push(@x);
unshift(@x);
EXPECT
Useless use of push with no values at - line 4.
Useless use of unshift with no values at - line 5.
########
# op.c
# 20020401 mjd@plover.com at suggestion of jfriedl@yahoo.com
use warnings 'regexp';
split /blah/g, "blah";
no warnings 'regexp';
split /blah/g, "blah";
EXPECT
Use of /g modifier is meaningless in split at - line 4.
########
# op.c
use warnings 'precedence';
$a = $b & $c == $d;
$a = $b ^ $c != $d;
$a = $b | $c > $d;
$a = $b < $c & $d;
$a = $b >= $c ^ $d;
$a = $b <= $c | $d;
$a = $b <=> $c & $d;
$a &= $b == $c; $a |= $b == $c; $a ^= $b == $c; # shouldn't warn
no warnings 'precedence';
$a = $b & $c == $d;
$a = $b ^ $c != $d;
$a = $b | $c > $d;
$a = $b < $c & $d;
$a = $b >= $c ^ $d;
$a = $b <= $c | $d;
$a = $b <=> $c & $d;
EXPECT
Possible precedence problem on bitwise & operator at - line 3.
Possible precedence problem on bitwise ^ operator at - line 4.
Possible precedence problem on bitwise | operator at - line 5.
Possible precedence problem on bitwise & operator at - line 6.
Possible precedence problem on bitwise ^ operator at - line 7.
Possible precedence problem on bitwise | operator at - line 8.
Possible precedence problem on bitwise & operator at - line 9.
########
# op.c
use integer;
use warnings 'precedence';
$a = $b & $c == $d;
$a = $b ^ $c != $d;
$a = $b | $c > $d;
$a = $b < $c & $d;
$a = $b >= $c ^ $d;
$a = $b <= $c | $d;
$a = $b <=> $c & $d;
no warnings 'precedence';
$a = $b & $c == $d;
$a = $b ^ $c != $d;
$a = $b | $c > $d;
$a = $b < $c & $d;
$a = $b >= $c ^ $d;
$a = $b <= $c | $d;
$a = $b <=> $c & $d;
EXPECT
Possible precedence problem on bitwise & operator at - line 4.
Possible precedence problem on bitwise ^ operator at - line 5.
Possible precedence problem on bitwise | operator at - line 6.
Possible precedence problem on bitwise & operator at - line 7.
Possible precedence problem on bitwise ^ operator at - line 8.
Possible precedence problem on bitwise | operator at - line 9.
Possible precedence problem on bitwise & operator at - line 10.
########
# op.c

# ok	=> local() has desired effect;
# ignore=> local() silently ignored

use warnings 'syntax';

local(undef);		# OP_UNDEF		ignore
sub lval : lvalue {};
local(lval());		# OP_ENTERSUB
local($x **= 1);	# OP_POW
local($x *=  1);	# OP_MULTIPLY
local($x /=  1);	# OP_DIVIDE
local($x %=  1);	# OP_MODULO
local($x x=  1);	# OP_REPEAT
local($x +=  1);	# OP_ADD
local($x -=  1);	# OP_SUBTRACT
local($x .=  1);	# OP_CONCAT
local($x <<= 1);	# OP_LEFT_SHIFT
local($x >>= 1);	# OP_RIGHT_SHIFT
local($x &=  1);	# OP_BIT_AND
local($x ^=  1);	# OP_BIT_XOR
local($x |=  1);	# OP_BIT_OR
{
    use integer;
    local($x *= 1);	# OP_I_MULTIPLY
    local($x /= 1);	# OP_I_DIVIDE
    local($x %= 1);	# OP_I_MODULO
    local($x += 1);	# OP_I_ADD
    local($x -= 1);	# OP_I_SUBTRACT
}
local($x?$y:$z) = 1;	# OP_COND_EXPR		ok
# these two are fatal run-time errors instead
#local(@$a);		# OP_RV2AV		ok
#local(%$a);		# OP_RV2HV		ok
local(*a);		# OP_RV2GV		ok
local(@a[1,2]);		# OP_ASLICE		ok
local(@a{1,2});		# OP_HSLICE		ok
local(@a = (1,2));	# OP_AASSIGN
local($$x);		# OP_RV2SV		ok
local($#a);		# OP_AV2ARYLEN
local($x =   1);	# OP_SASSIGN
local($x &&= 1);	# OP_ANDASSIGN
local($x ||= 1);	# OP_ORASSIGN
local($x //= 1);	# OP_DORASSIGN
local($a[0]);		# OP_AELEMFAST		ok

local(substr($x,0,1));	# OP_SUBSTR
local(pos($x));		# OP_POS
local(vec($x,0,1));	# OP_VEC
local($a[$b]);		# OP_AELEM		ok
local($a{$b});		# OP_HELEM		ok
local($[);		# OP_CONST

no warnings 'syntax';
EXPECT
Useless localization of subroutine entry at - line 10.
Useless localization of exponentiation (**) at - line 11.
Useless localization of multiplication (*) at - line 12.
Useless localization of division (/) at - line 13.
Useless localization of modulus (%) at - line 14.
Useless localization of repeat (x) at - line 15.
Useless localization of addition (+) at - line 16.
Useless localization of subtraction (-) at - line 17.
Useless localization of concatenation (.) or string at - line 18.
Useless localization of left bitshift (<<) at - line 19.
Useless localization of right bitshift (>>) at - line 20.
Useless localization of bitwise and (&) at - line 21.
Useless localization of bitwise xor (^) at - line 22.
Useless localization of bitwise or (|) at - line 23.
Useless localization of integer multiplication (*) at - line 26.
Useless localization of integer division (/) at - line 27.
Useless localization of integer modulus (%) at - line 28.
Useless localization of integer addition (+) at - line 29.
Useless localization of integer subtraction (-) at - line 30.
Useless localization of list assignment at - line 39.
Useless localization of array length at - line 41.
Useless localization of scalar assignment at - line 42.
Useless localization of logical and assignment (&&=) at - line 43.
Useless localization of logical or assignment (||=) at - line 44.
Useless localization of defined or assignment (//=) at - line 45.
Useless localization of substr at - line 48.
Useless localization of match position at - line 49.
Useless localization of vec at - line 50.
########
# op.c
use warnings 'deprecated';
my $x1 if 0;
my @x2 if 0;
my %x3 if 0;
my ($x4) if 0;
my ($x5,@x6, %x7) if 0;
0 && my $z1;
0 && my (%z2);
# these shouldn't warn
our $x if 0;
our $x unless 0;
if (0) { my $w1 }
if (my $w2) { $a=1 }
if ($a && (my $w3 = 1)) {$a = 2}

EXPECT
Deprecated use of my() in false conditional at - line 3.
Deprecated use of my() in false conditional at - line 4.
Deprecated use of my() in false conditional at - line 5.
Deprecated use of my() in false conditional at - line 6.
Deprecated use of my() in false conditional at - line 7.
Deprecated use of my() in false conditional at - line 8.
Deprecated use of my() in false conditional at - line 9.