October 2016
Intermediate to advanced
320 pages
6h 39m
English
Content preview from PHP 7 Programming BlueprintsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Building an Abstract Syntax Tree
Currently, our parser interprets the input code and evaluates it in the same pass. Most compilers and interpreters; however, create an intermediate data structure before actually running the program: an Abstract Syntax Tree (AST). Using an AST offers some interesting possibilities; for example, it provides you with a structured representation of your program that you can then analyze. Also, you can use the AST and transform it back into a text-based program (maybe of another language).
An AST is a tree that represents the structure of a program. The first step to building an AST-based parser is to design the tree's object model: which classes are needed and in which way are they associated to another. The following ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.