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warn-1global
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1998-03-05
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Check existing $^W functionality
__END__
# warnable code, warnings disabled
$a =+ 3 ;
EXPECT
########
-w
# warnable code, warnings enabled via command line switch
$a =+ 3 ;
EXPECT
Reversed += operator at - line 3.
########
#! perl -w
# warnable code, warnings enabled via #! line
$a =+ 3 ;
EXPECT
Reversed += operator at - line 3.
########
# warnable code, warnings enabled via compile time $^W
BEGIN { $^W = 1 }
$a =+ 3 ;
EXPECT
Reversed += operator at - line 4.
########
# compile-time warnable code, warnings enabled via runtime $^W
# so no warning printed.
$^W = 1 ;
$a =+ 3 ;
EXPECT
########
# warnable code, warnings enabled via runtime $^W
$^W = 1 ;
my $b ; chop $b ;
EXPECT
Use of uninitialized value at - line 4.
########
# warnings enabled at compile time, disabled at run time
BEGIN { $^W = 1 }
$^W = 0 ;
my $b ; chop $b ;
EXPECT
########
# warnings disabled at compile time, enabled at run time
BEGIN { $^W = 0 }
$^W = 1 ;
my $b ; chop $b ;
EXPECT
Use of uninitialized value at - line 5.
########
-w
--FILE-- abcd
my $b ; chop $b ;
1 ;
--FILE--
require "./abcd";
EXPECT
Use of uninitialized value at ./abcd line 1.
########
--FILE-- abcd
my $b ; chop $b ;
1 ;
--FILE--
#! perl -w
require "./abcd";
EXPECT
Use of uninitialized value at ./abcd line 1.
########
--FILE-- abcd
my $b ; chop $b ;
1 ;
--FILE--
$^W =1 ;
require "./abcd";
EXPECT
Use of uninitialized value at ./abcd line 1.
########
--FILE-- abcd
$^W = 0;
my $b ; chop $b ;
1 ;
--FILE--
$^W =1 ;
require "./abcd";
EXPECT
########
--FILE-- abcd
$^W = 1;
1 ;
--FILE--
$^W =0 ;
require "./abcd";
my $b ; chop $b ;
EXPECT
Use of uninitialized value at - line 3.
########
$^W = 1;
eval "my $b ; chop $b ;" ;
EXPECT
Use of uninitialized value at - line 3.
Use of uninitialized value at - line 3.
########
eval "$^W = 1;" ;
my $b ; chop $b ;
EXPECT
########
eval {$^W = 1;} ;
my $b ; chop $b ;
EXPECT
Use of uninitialized value at - line 3.
########
{
local ($^W) = 1;
}
my $b ; chop $b ;
EXPECT
########
my $a ; chop $a ;
{
local ($^W) = 1;
my $b ; chop $b ;
}
my $c ; chop $c ;
EXPECT
Use of uninitialized value at - line 5.
########
-w
-e undef
EXPECT
Use of uninitialized value at - line 2.