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@enum/@match Implementation Timeline

Status: Phase 19 完了2025-10-08 - 実装完了記録

Visual Guide: 12-17 day implementation schedule with gates 完了2025-10-08


🎉 実装完了状況2025-10-08

  • All Gates Passed: Week 1-3 すべて完了
  • @enum macro: 完全実装enum_parser.rs, 147行
  • match式: 完全実装match_expr.rs, 392行
  • Timeline: 計画12-17日 → 実績: Phase 19内完了
  • ⚠️ 実装方式: @matchマクロではなく、正規match構文として実装

📊 Gantt-Style Timeline

Week 1: @enum Macro (Days 1-5)
═══════════════════════════════════════════════════════════════════
Day 1  ████████ Parser + AST                          6-8h
Day 2  ████████ Macro Integration                     6-8h
Day 3  ████████ Constructor Generation                6-8h
Day 4  ████████ Test Suite (10 patterns)              6-8h
Day 5  ████     Smoke Tests                           4-6h
       ▼
    [GATE 1] ✅ 10/10 tests PASS → GO
             ❌ < 8/10 tests     → +1-2 days or ROLLBACK

Week 2: @match Macro (Days 6-11)
═══════════════════════════════════════════════════════════════════
Day 6  ████████ Parser @match                         6-8h
Day 7  ████████ Pattern Analysis                      6-8h
Day 8  ████████ If-Else Desugaring                    6-8h
Day 9  ████     Exhaustiveness Check                  4-6h
Day 10 ████████ Test Suite (15 patterns)              8h
Day 11 ████     Edge Cases                            4-6h
       ▼
    [GATE 2] ✅ 15/15 tests PASS → GO
             ⚠️  12-14/15 tests  → CONTINUE with limitations
             ❌ < 12/15 tests     → ROLLBACK to @enum-only

Week 3: Selfhost Application (Days 12-14)
═══════════════════════════════════════════════════════════════════
Day 12 ████     Option/Result v2                      4h
Day 13 ████████ Mini-VM Integration                   6-8h
Day 14 ████     Integration Tests + Docs              4-6h
       ▼
    [GATE 3] ✅ ALL smoke tests PASS → SHIP
             ❌ Regressions/failures → FULL ROLLBACK

Buffer (Days 15-17)
═══════════════════════════════════════════════════════════════════
Day 15 ████     Debug, optimize, polish               As needed
Day 16 ████     (flexible)                            As needed
Day 17 ████     Final checks                          As needed
       ▼
    [FINAL GATE] ✅ Ready → COMMIT
                 ❌ Issues → ABORT (rollback)

Legend:

  • ████████ = Full day (6-8h)
  • ████ = Half day (4h)
  • = Quality gate
  • = Success path
  • = Failure/rollback path
  • ⚠️ = Caution/extend timeline

🚦 Critical Path Analysis

Blocking Dependencies

Day 1 (Parser) ────────────┐
                           ▼
Day 2 (Macro Integration) ─┤
                           ├─→ Day 3 (Constructors) ────┐
                           │                             ▼
                           │                          Day 4 (Tests)
                           │                             ▼
                           │                          Day 5 (Smoke)
                           │                             ▼
                           │                          [GATE 1]
                           │                             │
                           ▼                             ▼
Day 6 (Parser @match) ◄────────────────────────────────┘
       │
       ▼
Day 7 (Pattern Analysis) ──┐
                           ▼
Day 8 (Desugaring) ────────┤
                           ├─→ Day 9 (Exhaustiveness) ──┐
                           │                             ▼
                           │                          Day 10 (Tests)
                           │                             ▼
                           │                          Day 11 (Edge Cases)
                           │                             ▼
                           │                          [GATE 2]
                           │                             │
                           ▼                             ▼
Day 12 (Option/Result v2) ◄─────────────────────────────┘
       │
       ▼
Day 13 (Mini-VM) ──────────┐
                           ▼
Day 14 (Integration) ──────┤
                           ▼
                        [GATE 3]
                           │
                           ▼
                    Days 15-17 (Buffer)
                           │
                           ▼
                    [FINAL GATE] → COMMIT or ABORT

Critical Path: Days 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 10 → 11 → 12 → 13 → 14

Float Time: Day 9 (can parallelize with Day 8 if needed)


📈 Cumulative Progress Chart

Progress (%)
100% ┤                                          ████████████
     │                                    ██████
 80% ┤                              ██████
     │                        ██████
 60% ┤                  ██████
     │            ██████
 40% ┤      ██████
     │████████
 20% ┤
     │
  0% └┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───
      1   2   3   4   5   6   7   8   9  10  11  12  13  14
      │               │                       │           │
   @enum          GATE1                   GATE2       GATE3
   Start                                              SHIP

Milestones:

  • Day 5: ~35% complete (@enum done)
  • Day 11: ~80% complete (@match done)
  • Day 14: 100% complete (ready to ship)

🎯 Resource Allocation by Week

                 Week 1      Week 2      Week 3    Buffer
                 (5 days)    (6 days)    (3 days)  (3 days)
───────────────────────────────────────────────────────────
Parser           ████████    ████
                 (Days 1,6)

Macro Engine     ████████    ████████████
                 (Days 2-3)  (Days 7-9)

Testing                  ████████    ████    ████████████
                 (Days 4-5)  (Day 10-11) (Day 14) (Days 15-17)

Integration                              ████████
                                     (Days 12-13)

Documentation                                ████    ████
                                         (Day 14) (Days 15-17)

Peak Load: Days 7-8 (parser + macro engine + pattern analysis)


⏱️ Time Budget Breakdown

Total Hours: 84-136 hours

Category                Hours      % of Total
─────────────────────────────────────────────
Parser Development      24-32      28%  ██████████
Macro Implementation    30-40      36%  ████████████
Testing                 20-30      24%  ████████
Integration             10-14       8%  ███
Documentation            6-10       4%  ██

By Week

Week     Hours    Effort Level
──────────────────────────────
Week 1   30-40h   ████████ (High - @enum foundation)
Week 2   38-50h   ██████████ (Very High - @match complexity)
Week 3   16-22h   █████ (Medium - integration)
Buffer    0-24h   ██ (Low - polish/debug)

🚨 Risk Timeline

When Risks Materialize

Day   High-Risk Events                        Mitigation Ready?
─────────────────────────────────────────────────────────────────
1     Parser conflicts (60%)                  ✅ Fallback syntax ready
2     MIR16 limitation discovered (5%)        ✅ Proof-of-concept done
3     Constructor generation fails (30%)      ✅ Manual fallback available
7     Variable binding complexity (55%)       ✅ Single-field MVP ready
9     Exhaustiveness false positives (50%)    ✅ Env flag ready
11    Edge cases fail (35%)                   ✅ Limited @match OK
13    Mini-VM integration breaks (30%)        ✅ Can skip Mini-VM
14    Performance regression (40%)            ✅ Profiling ready

Highest Risk Days: Day 1 (parser), Day 7 (bindings), Day 9 (exhaustiveness)


🎲 Monte Carlo Simulation Results

Based on risk probabilities and time estimates

Completion Timeline Probability Distribution:
─────────────────────────────────────────────
12 days ████             10% (optimistic)
13 days ██████           15%
14 days ████████████     25% (most likely)
15 days ████████████     25%
16 days ████████         20%
17 days ████             10%
18+ days █                5% (pessimistic)

Median Completion: 14-15 days 90% Confidence: Complete by Day 17 Mean Time: 14.3 days


📅 Example Calendar (4-Week View)

Assuming start on Monday

        Week 1              Week 2              Week 3          Week 4
Mon   │ Day 1: Parser    │ Day 6: @match     │ Day 12: Opt/Res│ Day 15: Buffer │
Tue   │ Day 2: Macro     │ Day 7: Pattern    │ Day 13: Mini-VM│ Day 16: Buffer │
Wed   │ Day 3: Ctor      │ Day 8: Desugar    │ Day 14: Tests  │ Day 17: Final  │
Thu   │ Day 4: Tests     │ Day 9: Exhaust.   │ WEEKEND        │ SHIP 🚀       │
Fri   │ Day 5: Smoke     │ Day 10: Tests     │                │                │
      │ GATE 1 ✅        │ Day 11: Edge      │                │                │
Sat   │ WEEKEND          │ GATE 2 ✅        │                │                │
Sun   │ WEEKEND          │ WEEKEND           │                │                │

Total Calendar Days: 24 days (17 work days + 7 weekend days)

Holidays/Breaks: Plan buffer days around potential interruptions


🎯 Daily Success Indicators

Green (On Track)

  • Tests passing as expected
  • No blockers
  • Timeline holding

Yellow (Caution)

  • Some tests failing (< 20%)
  • Minor blockers (< 1 day delay)
  • Timeline slipping 1 day

Red (At Risk)

  • Many tests failing (> 20%)
  • Major blockers (> 1 day delay)
  • Timeline slipping > 2 days

📊 Velocity Tracking Template

Day  Planned  Actual  Variance  Tests Pass  Status
────────────────────────────────────────────────────
1    8h       ___h    ___h      N/A         ○○○○○
2    8h       ___h    ___h      N/A         ○○○○○
3    8h       ___h    ___h      N/A         ○○○○○
4    8h       ___h    ___h      __/10       ○○○○○
5    6h       ___h    ___h      Smoke       ○○○○○
...
14   6h       ___h    ___h      ALL         ○○○○○

Status Legend:

  • ●●●●● = 100% complete, green
  • ●●●●○ = 80% complete, yellow
  • ●●●○○ = 60% complete, yellow
  • ●●○○○ = 40% complete, red
  • ●○○○○ = 20% complete, red

🏁 Final Checklist (Day 17)

[ ] All 30 test patterns PASS (10 @enum + 15 @match + 5 integration)
[ ] All smoke tests PASS (62 total)
[ ] Performance < 5% regression
[ ] Documentation complete (3 READMEs + migration guide)
[ ] CURRENT_TASK.md updated
[ ] CLAUDE.md updated
[ ] Commit message drafted
[ ] Post-mortem template filled
[ ] Lessons learned documented
[ ] Future work identified

═══════════════════════════════════════════════════════════
READY TO SHIP 🚀

Created: 2025-10-08 For: Choice A'' (Macro-Only Implementation) Reference: ENUM_MATCH_PROJECT_PLAN.md