Implementation Status

tswift targets the full Swift 6.3 surface area. This dashboard tracks progress across language features, the standard library, Foundation, and SwiftUI.

At a glance

Language

82%

Tiers 0–9 · 140 of 171 features

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Standard Library

73%

19 of 26 major areas

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Foundation

17%

2 of 12 APIs

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SwiftUI

4%

Tiers v1–5 shipped · 29 of 658 surface members

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Language tiers

The Swift language surface is organised into tiers by complexity and dependency order.

Tier 0 — Lexical & Literals100% (17/17)
Tier 1 — Core Imperative (functions, control flow)91% (20/22)
Tier 2 — Value & Nominal Types89% (25/28)
Tier 3 — Reference Types & ARC95% (19/20)
Tier 4 — Protocols, Generics, Extensions85% (23/27)
Tier 5 — Error Handling80% (8/10)
Tier 6 — Advanced Types & Expressions54% (7/13)
Tier 7 — Concurrency64% (9/14)
Tier 8 — Macros & Metaprogramming50% (4/8)
Tier 9 — Attributes, Access Control, Operators40% (8/20)

Roadmap

Implementation phases follow the runtime design plan (R0–R6+):

✅
R0–R1

Literals, bindings, control flow, basic stdlib

✅
R2

Value types: struct, enum, optionals, properties

✅
R3

Reference types: class, ARC, closures

✅
R4

Protocols, generics, extensions, dispatch

✅
R5

Error handling, property wrappers, Codable, @main

⏳
R6

Bytecode VM for performance (future)

⏳
R6+

Concurrency ✓, Macros, SwiftUI, Ownership, Unsafe