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use Contextual::Return;
use Test::More 'no_plan';
my @todo_list = ( 'eat', 'drink', 'be merry' );
sub interp_explicit {
return (
SCALAR { scalar @todo_list } # In scalar context: how many?
LIST { @todo_list } # In list context: what are they?
SCALARREF { \scalar @todo_list } # Scalar context value as ref
ARRAYREF { \@todo_list } # List context value as array ref
);
}
sub interp_implicit {
return (
SCALAR { scalar @todo_list } # In scalar context: how many?
LIST { @todo_list } # In list context: what are they?
);
}
sub interp_num {
return (
NUM { scalar @todo_list } # In num context: how many?
LIST { @todo_list } # In list context: what are they?
);
}
sub interp_str {
return (
NUM { @todo_list + 1 } # In num context: how many + 1?
STR { scalar @todo_list } # In str context: how many?
LIST { @todo_list } # In list context: what are they?
);
}
is "There are ${interp_explicit()} ToDo tasks: @{interp_explicit()}",
'There are 3 ToDo tasks: eat drink be merry'
=> 'Explicit interpolators';
is "There are ${interp_implicit()} ToDo tasks: @{interp_implicit()}",
'There are 3 ToDo tasks: eat drink be merry'
=> 'Implicit interpolators';
is "There are ${interp_num()} ToDo tasks: @{interp_num()}",
'There are 3 ToDo tasks: eat drink be merry'
=> 'Numeric interpolators';
is "There are ${interp_str()} ToDo tasks: @{interp_str()}",
'There are 3 ToDo tasks: eat drink be merry'
=> 'String interpolators';
is 0+${interp_str()}, "4" => 'Smart numbers';
is "".${interp_str()}, "3" => 'Smart strings';
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