Adds spread operator for records, allowing concise record updates:
let p2 = { ...p, x: 5.0 }
Changes across the full pipeline:
- Lexer: new DotDotDot (...) token
- AST: optional spread field on Record variant
- Parser: detect ... at start of record expression
- Typechecker: merge spread record fields with explicit overrides
- Interpreter: evaluate spread, overlay explicit fields
- JS backend: emit native JS spread syntax
- C backend: copy spread into temp, assign overrides
- Formatter, linter, LSP, symbol table: propagate spread
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Tuple index: `pair.0`, `pair.1` syntax across parser, typechecker,
interpreter, C/JS backends, formatter, linter, and symbol table
- Multi-line function args: allow newlines inside argument lists
- Fix effect unification for callback parameters (empty expected
effects means "no constraint", not "must be pure")
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Build a complete static site generator in Lux that faithfully clones
blu.cx (elmstatic). Generates 14 post pages, section indexes, tag pages,
and a home page with snippets grid from markdown content.
Language fixes discovered during development:
- Add \{ and \} escape sequences in string literals (lexer)
- Register String.indexOf and String.lastIndexOf in type checker
- Fix formatter to preserve brace escapes in string literals
- Improve LSP hover to show documentation for let bindings and functions
ISSUES.md documents 15 Lux language limitations found during the project.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
When hovering on declaration keywords (fn, type, effect, let, trait),
look ahead to find the declaration name and show that symbol's full
info from the symbol table instead of generic keyword documentation.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add inlay type hints for let bindings, parameter name hints at call sites,
behavioral property documentation in hover, and long signature wrapping.
- Inlay hints: show inferred types for let bindings without annotations
- Parameter hints: show param names at call sites for multi-arg functions
- Hover: wrap long signatures, show behavioral property docs (pure, total, etc.)
- Rich docs: detailed hover for keywords like pure, total, idempotent, run, with
- TypeChecker: expose get_inferred_type() for LSP consumption
- Symbol table: include behavioral properties in function type signatures
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Website rebuilt from scratch based on analysis of 11 beloved language
websites (Elm, Zig, Gleam, Swift, Kotlin, Haskell, OCaml, Crystal, Roc,
Rust, Go).
New website structure:
- Homepage with hero, playground, three pillars, install guide
- Language Tour with interactive lessons (hello world, types, effects)
- Examples cookbook with categorized sidebar
- API documentation index
- Installation guide (Nix and source)
- Sleek/noble design (black/gold, serif typography)
Also includes:
- New stdlib/json.lux module for JSON serialization
- Enhanced stdlib/http.lux with middleware and routing
- New string functions (charAt, indexOf, lastIndexOf, repeat)
- LSP improvements (rename, signature help, formatting)
- Package manager transitive dependency resolution
- Updated documentation for effects and stdlib
- New showcase example (task_manager.lux)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Benchmarks:
- Add fib, list_ops, primes benchmarks comparing Lux vs Node.js vs Rust
- Lux matches Rust performance and is 8-30x faster than Node.js
- Add docs/benchmarks.md documenting results
LSP improvements:
- Context-aware completions (module access vs general)
- Add List, String, Option, Result, Console, Math method completions
- Add type and builtin completions
- Hover now shows type signatures and documentation for known symbols
- Hover returns formatted markdown with code blocks
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Add a Language Server Protocol (LSP) server to enable IDE integration.
The server provides:
- Real-time diagnostics (parse errors and type errors)
- Basic hover information
- Keyword completions (fn, let, if, match, type, effect, etc.)
- Go-to-definition stub (ready for implementation)
Usage: lux --lsp
The LSP server can be integrated with any editor that supports LSP,
including VS Code, Neovim, Emacs, and others.
Dependencies added:
- lsp-server 0.7
- lsp-types 0.94
- serde with derive feature
- serde_json
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
