NL is a statically typed programming language targeting .NET.

The compiler is written in F# using FsLex and FsYacc for lexing and parsing, and SRE for CIL emission.

It is a hobby project used by the author as a first exploration of programming language design and compiler implementation.

Links (also see the Wiki):

• Various notes about NL including design and implementation insight
• NL Language Specification - Draft

Notes on .NET 7 upgrade (complete)

• .NET 7.0 doesn't support AssemblyBuilder.Save. But that should be coming in .NET 8.
• There is new position pos_orig_lnum that's part of FsLex that we aren't sure how to use yet.
• VisualNli hasn't been migrated. But it might be possible. But we might prefer to focus energies on VSCode integration.

Notes on .NET 9 upgrade (complete)

AssemblyBuilder.Save

• dotnet/runtime#15704
• dotnet/runtime#97015
• https://learn.microsoft.com/en-us/dotnet/fundamentals/runtime-libraries/system-reflection-emit-persistedassemblybuilder