Perl 6 Deep Dive

The so operator

The so operator converts the operand to a Boolean value and returns it, as shown in the following example:

say so 0;    # Falsesay so 42;   # Truesay so True; # True

The ? operator has a higher precedence than the so operator.

The so routine also exists as a method of the Mu class and can be called like $var.so on a variable. (Classes are discussed in Chapter 8, Object-Oriented Programming; Mu is one of the classes on the top of Perl 6 class hierarchy.) So, the following code can be read as an English phrase 'If something is so, then do the following':

my $smth = True;if $smth.so {     say 'True';}