Re: RFC 263 (v1) Add null() keyword and fundamental data type

[Eric Roode]

1. You don't say in your RFC, but I'm guessing, that a null value
evaluates to false in a boolean context. Correct?

2. In your abstract, you say that undef is used to mean that a 
variable's value is undefined, which I presume means uninitialized.
You say that null would provide a useful way to indicate that a
variable's value is known to be unknown or not applicable. Then, 
at various places in the RFC, you use a hypothetical 
    use initialize 'null';
construct to initialize all new variables to null. Doesn't that 
defeat the purpose, and make null equivalent to undef?

3. Your RFC does not specify how a null value stringizes. What
is the output from:

    $a = null;
    print "a is '$a'";

I can see two possibilities: "a is ''" and "a is 'null'". 
I personally would greatly prefer the first.
Would the use of a null value in a string generate a warning, as
an undef value does now?

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