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Lambda 0.2 release (WIP)

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@henry-luo henry-luo released this 23 Mar 15:03
· 2271 commits to master since this release
lambda-0.2
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Lambda Script 0.2

Released: March 2026 | GitHub

Lambda Script 0.2 brings substantial advances across the language, runtime, layout engine, and cross-platform support since the 0.1 release (January 2026).

Lambda Language Features

  • Removed the list type — the data model is simplified to arrays, maps, and elements. list expressions are gone; use arrays.
  • Expressive pipe operator (|) for fluent set-oriented data transformation pipelines with inline mapping and filtering.
  • Powerful for-expressions with where, order by, limit, offset clauses for SQL-like data querying.
  • Pattern-based Matching & Query - Match expressions support value, range, type, and constrained patterns. And ? query operator searches data trees by type or structure, similar to jQuery.
  • New standard library functions: sort(), reduce(), parse(), ord(), chr(), math.random(seed), math module.
  • Structural deep equality for arrays, maps, and elements.
  • pn procedure parameters are now mutable.

JIT Compiler & Transpiler

  • MIR Direct is now the default JIT path — the previous C2MIR path is still available via --c2mir. Scripts run faster with no intermediate C file generation.
  • JS → MIR transpiler — the JavaScript transpiler now emits MIR directly, with tail call optimisation (TCO).
  • Major transpiler restructuring — cleaner separation of IR generation stages, tighter codegen for map access, for-loops, and closures.

Radiant Layout Engine

  • CSS Grid — substantially improved: grid template, auto placement, alignment, spanning, and many correctness fixes.
  • CSS Flexbox — all flex baseline tests now pass.
  • CSS Lists — enhanced list rendering with a dedicated test suite.
  • Table layout improvements including intrinsic sizing, row/cell alignment.
  • Viewport scrolling — scrollable viewport with scrollbar support.
  • @font-face support and faster font loading.

LaTeX & Math Rendering

  • New Tree-sitter based LaTeX parser replacing the old pipeline.
  • LaTeX → HTML pipeline with an enhanced formatter; no more temporary file generation.
  • Substantially improved math symbol, fraction, and font rendering.

JavaScript & DOM Support

  • Expanded JS and DOM API coverage.
  • JS execution speed improvements across multiple benchmark cases.

Data Formats & Markdown

  • 100% CommonMark compliance achieved.
  • Enhanced Markdown rendering: improved font support, emoji, nested lists, and correct double-bullet rendering.
  • Improved Wiki parser tests.

Charts Package

  • New chart package with candle, bar, line chart and many more.
  • Lambda-generated SVG charts can now be loaded and rendered inside the viewer.

Performance & Benchmarking

  • Added benchmark test suites, and benchmarked against Node.js, Python and QuickJS.
  • GC tuning: reduced nursery pressure, faster map allocation.
  • Parser table size reduced by tuning the Tree-sitter grammar.
  • Memory profiling added.

Lambda Script is still evolving — syntax and semantics may change between releases.

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