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#!/usr/bin/perl -w
use strict;
use warnings qw( FATAL all NONFATAL void );
use lib 'lib';
use Test::More tests => 17;
use Data::Alias qw/alias copy/;
our $x;
our $y;
alias { BEGIN { $x = $y } };
BEGIN { is \$x, \$y; alias $y = copy 42 }
alias { BEGIN { do "./t/lib/assign.pm" or die $! } };
isnt \$x, \$y;
is $x, 42;
our $z = 1;
alias($x = $y) = $z;
is \$x, \$y;
isnt \$x, \$z;
is $x, $z;
alias { sub foo { $x = $y } };
is \foo, \$y;
is \$x, \$y;
alias(sub { $x = $z })->();
is \$x, \$z;
$x++;
alias { {;} $x } = $y;
is \$x, \$z;
is $x, $y;
eval "{;}\n\nalias { Data::Alias::deref = 42 };\n\n{;}\n";
like $@, qr/^Unsupported alias target .* line 3\b/;
eval "{;}\n\nuse warnings qw( FATAL void ); \$x = alias \$y;\n\n{;}\n";
like $@, qr/^Useless use of alias .* line 3\b/;
is \alias(sub { $x })->(), \$x;
no warnings 'void';
alias copy alias copy $x = 99;
is \$x, \$z;
is $x, 99;
# vim: ft=perl
is \undef, scalar \alias
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