klox
Grasmin
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klox
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Using Advent of Code to test C3
Last year I did the same: using my extended implementation of Lox. I didn't get so far in Advent of Code itself (only 4 days) since I spent much more time adding features to the language / standard library! Standard Lox as implemented in the Crafting Interpreters book is lacking many useful things including input reading, arrays, collections like sets & hash maps. Example: https://github.com/mrjameshamilton/klox/blob/master/examples/aoc-2021/advent-day01.lox
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JEP draft: Classfile API
I was also experimenting in Kotlin with some higher-level helper functions for the ProGuardCORE code builder, like using code blocks for try-catch, switches etc
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Show HN: I spent my vacation writing a modern JVM assembler
Something else that could make your code generation for your JVM language easier: ProGuardCORE (https://github.com/Guardsquare/proguard-core). It can be used to read, generate and analyse Java bytecode.
Some examples for code generation: ProGuard where the project originated (https://github.com/Guardsquare/proguard), Brainf*ck compiler (https://github.com/mrjameshamilton/bf), Lox compiler (https://github.com/mrjameshamilton/klox)
Disclaimer: I work at Guardsquare on ProGuardCORE so may be biased ;)
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Looking for resources on building a compiler
I implemented Lox in Kotlin based on the book's Java interpreter then added a JVM backend using ProGuardCORE: https://github.com/mrjameshamilton/klox
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Crafting Interpreters – Web Version
It's a great book! I really liked how it guides step-by-step, always having something working building up to the full interpreter for Lox. I haven't yet gotten around to the 2nd part of the book (the C based interpreter/vm) because I got carried away with adding extra features to my Kotlin Lox implementation (including a JVM backend)! https://github.com/mrjameshamilton/klox
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Is there any books or guides on how to target JVM bytecode?
Not a book or guide but a useful library for working with/generating JVM class files is ProGuardCORE. It's the underlying library used by ProGuard and I also recently used it to add a JVM backend to my implementation of Lox from the Crafting Interpreters book.
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Concise language to write an interpreter for?
My implementation can be found here: https://github.com/mrjameshamilton/klox
Grasmin
What are some alternatives?
proguard-core - Library to read, write, analyze, and process java bytecode
jasm - A JVM assembler for the modern age
kotlin-native - Kotlin/Native infrastructure
jssembly - Jssembly is a library that allows you to execute native assembly from Java.
YAIL - Programming language where you can code using emojis 😌
Maker - Lightweight, full-featured, low-level dynamic Java class generator designed for ease of use.
jlox-plus - Jlox+ is a superset of the Lox programming language!
proguard-assembler - Assembler and disassembler for Java class files
proguard - ProGuard, Java optimizer and obfuscator