Check strict vars functionality

__END__

# no strict, should build & run ok.
Fred ;
my $fred ;
$b = "fred" ;
$a = $$b ;
EXPECT

########

use strict qw(subs refs) ;
$fred ;
EXPECT

########

use strict ;
no strict 'vars' ;
$fred ;
EXPECT

########

# strict vars - no error
use strict 'vars' ;
use vars qw( $freddy) ;
BEGIN { *freddy = \$joe::shmoe; }
$freddy = 2 ;
EXPECT

########

# strict vars - no error
use strict 'vars' ;
use vars qw( $freddy) ;
local $abc::joe ;
my $fred ;
my $b = \$fred ;
$Fred::ABC = 1 ;
$freddy = 2 ;
EXPECT

########

# strict vars - error
use strict ;
$fred ;
EXPECT
Global symbol "$fred" requires explicit package name at - line 4.
Execution of - aborted due to compilation errors.
########

# strict vars - error
use strict 'vars' ;
<$fred> ;
EXPECT
Global symbol "$fred" requires explicit package name at - line 4.
Execution of - aborted due to compilation errors.
########

# strict vars - error
use strict 'vars' ;
local $fred ;
EXPECT
Global symbol "$fred" requires explicit package name at - line 4.
Execution of - aborted due to compilation errors.
########

# Check compile time scope of strict vars pragma
use strict 'vars' ;
{
    no strict ;
    $joe = 1 ;
}
$joe = 1 ;
EXPECT
Variable "$joe" is not imported at - line 8.
Global symbol "$joe" requires explicit package name at - line 8.
Execution of - aborted due to compilation errors.
########

# Check compile time scope of strict vars pragma
no strict;
{
    use strict 'vars' ;
    $joe = 1 ;
}
$joe = 1 ;
EXPECT
Global symbol "$joe" requires explicit package name at - line 6.
Execution of - aborted due to compilation errors.
########

--FILE-- abc
$joe = 1 ;
1;
--FILE-- 
use strict 'vars' ;
require "./abc";
EXPECT

########

--FILE-- abc
use strict 'vars' ;
1;
--FILE-- 
require "./abc";
$joe = 1 ;
EXPECT

########

--FILE-- abc
use strict 'vars' ;
$joe = 1 ;
1;
--FILE-- 
$joe = 1 ;
require "./abc";
EXPECT
Variable "$joe" is not imported at ./abc line 2.
Global symbol "$joe" requires explicit package name at ./abc line 2.
Compilation failed in require at - line 2.
########

--FILE-- abc.pm
use strict 'vars' ;
$joe = 1 ;
1;
--FILE-- 
$joe = 1 ;
use abc;
EXPECT
Variable "$joe" is not imported at abc.pm line 2.
Global symbol "$joe" requires explicit package name at abc.pm line 2.
Compilation failed in require at - line 2.
BEGIN failed--compilation aborted at - line 2.
########

--FILE-- abc.pm
package Burp;
use strict;
$a = 1;$f = 1;$k = 1; # just to get beyond the limit...
$b = 1;$g = 1;$l = 1;
$c = 1;$h = 1;$m = 1;
$d = 1;$i = 1;$n = 1;
$e = 1;$j = 1;$o = 1;
$p = 0b12;
--FILE-- 
# known scalar leak
BEGIN { $ENV{PERL_DESTRUCT_LEVEL} = 0 unless $ENV{PERL_DESTRUCT_LEVEL} > 3; }
use abc;
EXPECT
Global symbol "$f" requires explicit package name at abc.pm line 3.
Global symbol "$k" requires explicit package name at abc.pm line 3.
Global symbol "$g" requires explicit package name at abc.pm line 4.
Global symbol "$l" requires explicit package name at abc.pm line 4.
Global symbol "$c" requires explicit package name at abc.pm line 5.
Global symbol "$h" requires explicit package name at abc.pm line 5.
Global symbol "$m" requires explicit package name at abc.pm line 5.
Global symbol "$d" requires explicit package name at abc.pm line 6.
Global symbol "$i" requires explicit package name at abc.pm line 6.
Global symbol "$n" requires explicit package name at abc.pm line 6.
Global symbol "$e" requires explicit package name at abc.pm line 7.
Global symbol "$j" requires explicit package name at abc.pm line 7.
Global symbol "$o" requires explicit package name at abc.pm line 7.
Global symbol "$p" requires explicit package name at abc.pm line 8.
Illegal binary digit '2' at abc.pm line 8, at end of line
abc.pm has too many errors.
Compilation failed in require at - line 3.
BEGIN failed--compilation aborted at - line 3.
########

# Check scope of pragma with eval
no strict ;
eval {
    $joe = 1 ;
};
print STDERR $@;
$joe = 1 ;
EXPECT

########

# Check scope of pragma with eval
no strict ;
eval {
    use strict 'vars' ;
    $joe = 1 ;
};
print STDERR $@;
$joe = 1 ;
EXPECT
Global symbol "$joe" requires explicit package name at - line 6.
Execution of - aborted due to compilation errors.
########

# Check scope of pragma with eval
use strict 'vars' ;
eval {
    $joe = 1 ;
};
print STDERR $@;
$joe = 1 ;
EXPECT
Global symbol "$joe" requires explicit package name at - line 5.
Global symbol "$joe" requires explicit package name at - line 8.
Execution of - aborted due to compilation errors.
########

# Check scope of pragma with eval
use strict 'vars' ;
eval {
    no strict ;
    $joe = 1 ;
};
print STDERR $@;
$joe = 1 ;
EXPECT
Variable "$joe" is not imported at - line 9.
Global symbol "$joe" requires explicit package name at - line 9.
Execution of - aborted due to compilation errors.
########

# Check scope of pragma with eval
no strict ;
eval '
    $joe = 1 ;
'; print STDERR $@ ;
$joe = 1 ;
EXPECT

########

# Check scope of pragma with eval
no strict ;
eval q[ 
    use strict 'vars' ;
    $joe = 1 ;
]; print STDERR $@;
EXPECT
Global symbol "$joe" requires explicit package name at (eval 1) line 3.
########

# Check scope of pragma with eval
use strict 'vars' ;
eval '
    $joe = 1 ;
'; print STDERR $@ ;
EXPECT
Global symbol "$joe" requires explicit package name at (eval 1) line 2.
########

# Check scope of pragma with eval
use strict 'vars' ;
eval '
    no strict ;
    $joe = 1 ;
'; print STDERR $@;
$joe = 1 ;
EXPECT
Global symbol "$joe" requires explicit package name at - line 8.
Execution of - aborted due to compilation errors.
########

# Check if multiple evals produce same errors
use strict 'vars';
my $ret = eval q{ print $x; };
print $@;
print "ok 1\n" unless defined $ret;
$ret = eval q{ print $x; };
print $@;
print "ok 2\n" unless defined $ret;
EXPECT
Global symbol "$x" requires explicit package name at (eval 1) line 1.
ok 1
Global symbol "$x" requires explicit package name at (eval 2) line 1.
ok 2
########

# strict vars with outer our - no error
use strict 'vars' ;
our $freddy;
local $abc::joe ;
my $fred ;
my $b = \$fred ;
$Fred::ABC = 1 ;
$freddy = 2 ;
EXPECT

########

# strict vars with inner our - no error
use strict 'vars' ;
sub foo {
    our $fred;
    $fred;
}
EXPECT

########

# strict vars with outer our, inner use - no error
use strict 'vars' ;
our $fred;
sub foo {
    $fred;
}
EXPECT

########

# strict vars with nested our - no error
use strict 'vars' ;
our $fred;
sub foo {
    our $fred;
    $fred;
}
$fred ;
EXPECT

########

# strict vars with elapsed our - error
use strict 'vars' ;
sub foo {
    our $fred;
    $fred;
}
$fred ;
EXPECT
Variable "$fred" is not imported at - line 8.
Global symbol "$fred" requires explicit package name at - line 8.
Execution of - aborted due to compilation errors.
########

# nested our with local - no error
$fred = 1;
use strict 'vars';
{
    local our $fred = 2;
    print $fred,"\n";
}
print our $fred,"\n";
EXPECT
2
1
########

# "nailed" our declaration visibility across package boundaries
use strict 'vars';
our $foo;
$foo = 20;
package Foo;
print $foo, "\n";
EXPECT
20
########

# multiple our declarations in same scope, different packages, no warning
use strict 'vars';
use warnings;
our $foo;
${foo} = 10;
package Foo;
our $foo = 20;
print $foo, "\n";
EXPECT
20
########

# multiple our declarations in same scope, same package, warning
use strict 'vars';
use warnings;
our $foo;
${foo} = 10;
our $foo;
EXPECT
"our" variable $foo masks earlier declaration in same scope at - line 7.
########

# multiple our declarations in same scope, same package, warning
use strict 'vars';
use warnings;
{ our $x = 1 }
{ our $x = 0 }
our $foo;
{
    our $foo;
    package Foo;
    our $foo;
}
EXPECT
"our" variable $foo redeclared at - line 9.
	(Did you mean "local" instead of "our"?)
Name "Foo::foo" used only once: possible typo at - line 11.
########

# Make sure the strict vars failure still occurs
# now that the `@i should be written as \@i' failure does not occur
# 20000522 mjd@plover.com (MJD)
use strict 'vars';
no warnings;
"@i_like_crackers";
EXPECT
Global symbol "@i_like_crackers" requires explicit package name at - line 7.
Execution of - aborted due to compilation errors.
