README.md

lox

Summary

Lox interpreter written in C# (.NET 7)

This is my 2nd attempt. First one can be found here: https://github.com/h2oboi89/lox.archive

Based on Bob Nystrom's Lox book

• website: Crafting Interpreters
• github: munificent/craftinginterpreters

Sections Completed

Links are organized as [online book link] : [source code tag link].

NOTE: some sections do not contain a tag link as they only represent a partial section of code that did not lend itself to testing.

Tree-walk Interpreter

• Scanning : Scanning
• Representing Code
• Parsing Expressions : Parsing
  • this tag fixes some missing code that should have been in Scanning tag.
• Evaluating Expressions : EvaluatingExpressions
• Statements and State : Statements
• Control Flow : ControlFlow
• Functions : Functions
• Resolving and Binding : ResolveAndBinding
• Classes : Classes
• Inheritance : Inheritance

Bytecode Virtual Machine

Deviations / Enchancements

• Reworked interpreter to facilitate testing (see Interpreter.Tests)
• Superclass format is like C# (class : superclass) instead of using <

TODO

• block comments

• ternary expressions

• comma separated expression (var a = 1, var b = 2;)

• detect divide by zero

• REPL autoprints expressions

• add continue and break

• anonymous functions

• report unused variables

• static methods for classes

• public, private, protected fields and methods

• getters and setters

• multiple inheritance

• interfaces

• read user input built-ins

• namespaces and imports?

• enforce class name is upper case

• virtual, abstract, override

• warn user if field overrides method name

• make print a built-in function

• global scope not special (no more multiple declarations)

• allow single line functions (no braces)