Parsing the folder structure...

Construct, view and analyse atomic structures

Rates. The raises are what do the interesting and the Fed is a modifier of raises.

In our function that does all the magic,

All right let's wrap this up.

Recall that a compiler has five major phases,

Then you've parsed it! That string was in the language of the grammar.

You've just completed your first tough question on filling out the charts for parsing.

So the 3 of these together, E E are themselves one more E.

Students were asking about natural language processing.

I have used tools like the lexer and parser generators we're learning about in this class, Programming Languages.

Cannot parse the folder structure continuing import without subfolder support.

At the end of the day, the total number of edges that are created is n log n.

Those intentionally match.

Actually, the answer is a resounding yes.

If this tripped you up because it was almost too simple, don't worry about it.

And that key insight that we can stop somewhere around here is what's going to lead us to a more efficient parsing strategy.

This is the TNC network which we analyzed.

You can never put the dot on the left. The dot is always to the right.

This way, from the bottom to the top, is generating or producing a string.

Here's the real exciting part

You could imagine doing another one, but this is the one we used for this class.

If it's not, our input is not.

And then we'll say, this is a sentence that has a noun phrase, Fed, and a verb phrase, raises. And what gets raised is interest rates.

So what I'd like you to do is figure out after just 1 token of the input, what are some parse states we could be in?

Very soon, we're going to have a complete parser for HTML and JavaScript.

That's it for defining parsing functions for function calls and arguments.

So what was the structure of FORTRAN one?

You write out a grammar and then for each rule you write out how to build up the abstract syntax tree.

This is sometimes a good software engineering practice.

We say it's a parsing rule, with p_.

You and I know that there are 2 more tokens coming, but our parser doesn't know that yet.

Plus and Minus are both left associative and they're lower precedence.

Let's go through it together the Web page is broken down into words and trees.

We wanted to cover the basics of grammars, context free grammars, how we might parse them ourselves and we taught you a particular algorithm for that in class and then how to interface with a tool that uses a similar algorithm and then given a context free grammar and a description of how to build a parse tree or an abstract syntax tree puts it all together.

Just to review a bit, this is how we did basic HTML parsing or our basic HTML grammar.

Our input string is int plus int.

They were the circles.

Sure.

It's, more or less, exactly what we covered for JavaScript.

We had our little refresher on list comprehensions.

Do you understand the mechanism?

I would like you to fill in the blanks with a single word that will make this parse tree correspond to what our parser will produce on this input.

So in fact, we could have seen 4 input tokens INT INT and been in this parsing state.

Finite State Machines, adding a lexer that follows them automatically,