A bunch more questions!

[Ram Rachum]

1. What does PASS do? I couldn't figure it out. 

2. I've noticed that Shpaml is written using regex and imperative code, rather than defined as a grammar and using a parser package, which smells like the smarter solution. Is this intentional? What do you think about implementing Shpaml using a parser?

[Steve Howell]

PASS does the same thing that "pass" does in Python; it basically allows you to specify an empty block without confusing the indentation scheme.

The design choices to use regexes and imperative code were very intentional.  It would be interesting to see a formal-grammar approach to the problem.  There would be some challenges due to the indentation awareness and fact that you're wrapping arbitrary HTML.

On Friday, January 24, 2014 11:42 AM, Ram Rachum <ram.r...@gmail.com> wrote:

1. What does PASS do? I couldn't figure it out. 

2. I've noticed that Shpaml is written using regex and imperative code, rather than defined as a grammar and using a parser package, which smells like the smarter solution. Is this intentional? What do you think about implementing Shpaml using a parser?

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[Ram Rachum]

On Fri, Jan 24, 2014 at 9:39 PM, Steve Howell <show...@yahoo.com> wrote:

PASS does the same thing that "pass" does in Python; it basically allows you to specify an empty block without confusing the indentation scheme.

Out of curiosity, what is an empty block good for? How is it better than ending with || ?

 

The design choices to use regexes and imperative code were very intentional.  It would be interesting to see a formal-grammar approach to the problem.  There would be some challenges due to the indentation awareness and fact that you're wrapping arbitrary HTML.

I understand. 

 

On Friday, January 24, 2014 11:42 AM, Ram Rachum <ram.r...@gmail.com> wrote:

1. What does PASS do? I couldn't figure it out. 

2. I've noticed that Shpaml is written using regex and imperative code, rather than defined as a grammar and using a parser package, which smells like the smarter solution. Is this intentional? What do you think about implementing Shpaml using a parser?

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[James Robert]

Also, ending a line with || produces a block with no content (i.e., <div></div>) whereas using PASS results in a block with whitespace:

<div>

</div>

I'm not 100% sure, but I think the || notation was added later on in order to produce tags with no whitespace

[Steve Howell]

PASS did come first, and it was very analogous to Python's "pass".  In Python you should almost never have "pass" in your final code; it's usually just a placeholder while you're debugging or something.  Similar here.  There are strange edge cases where it's nice to have it to not have to reindent stuff.