March 2026
Intermediate
588 pages
14h 46m
English
Content preview from Practical Systems Programming in GoBecome 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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11
Adding New Features to SMALL
In our initial implementation of SMALL, we established the fundamental architecture of an interpreter. We built a lexer to digitize raw text into a stream of tokens, a Pratt parser to organize those tokens into a mathematically sound abstract syntax tree, and a tree-walking evaluator to execute the resulting logic. While this minimal feature set proved the viability of our execution model, a language restricted to simple arithmetic and static conditionals is limited in its practical utility. To transform SMALL from a theoretical exercise into a capable programming tool, we must now expand its expressive power.
Adding new features to a programming language, such as SMALL, is more than just a technical exercise; ...
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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.
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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.