# RUNTIME-001: Baseline Audit - Parser vs Runtime Status

**Date**: 2025-10-13
**Sprint**: sprint-runtime-001
**Ticket**: RUNTIME-001
**Status**: COMPLETED

## Executive Summary

**Baseline Finding**: 3 out of 4 features successfully parse, but NONE execute at runtime.

| Feature | Parser Status | Runtime Status | Priority |
|---------|---------------|----------------|----------|
| Structs | ✅ PARSES | ❌ NO EXECUTION | 1 (HIGH) |
| Classes | ✅ PARSES | ❌ NO EXECUTION | 2 (HIGH) |
| Actors | ✅ PARSES | ❌ NO EXECUTION | 3 (MEDIUM) |
| Async/Await | ❌ NOT IMPLEMENTED | ❌ NOT IMPLEMENTED | 4 (BLOCKED) |

## Critical Findings

### 🚨 SPECIFICATION ERROR DISCOVERED

**Issue**: docs/SPECIFICATION.md v15.0 incorrectly states:
> "await parses but NOT runtime-functional"

**Reality**: `async` keyword is NOT recognized by parser at all!

**Evidence**:
```bash
$ ruchy -e "async fn fetch_data() -> String { \"data\" }; 42"
Error: Evaluation error: Expected 'fun', '{', '|', or identifier after 'async'
```

**Impact**: Async/Await implementation requires BOTH parser AND runtime work, not just runtime.

**Action**: Update SPECIFICATION.md v16.0 to reflect accurate status.

---

## Detailed Test Results

### Test Suite: `tests/runtime_baseline_audit.rs`

**Total Tests**: 15
- ✅ **4 Passing**: 3 parser tests + 1 documentation test
- ❌ **0 Failing**: All tests either pass or properly ignored
- ⏸️ **11 Ignored**: 9 runtime tests (RED phase) + 2 async parser tests (not implemented)

### Structs - Baseline Status

**Parser**: ✅ WORKING
```rust
// Test: test_runtime_001_struct_parser_accepts_definition
// Status: PASSING
ruchy -e "struct Point { x: i32, y: i32 }; 42"
// Result: SUCCESS - parser accepts struct definitions
```

**Runtime**: ❌ NOT WORKING (all tests ignored - RED phase)
```rust
// Test: test_runtime_001_struct_runtime_executes_instantiation
// Status: IGNORED (will fail if un-ignored)
ruchy -e "struct Point { x: i32, y: i32 }; let p = Point { x: 10, y: 20 }; println!(p.x)"
// Expected: Print "10"
// Actual: Runtime error (struct instantiation not implemented)
```

**Tests Documented**:
1. `test_runtime_001_struct_parser_accepts_definition` ✅ PASSING
2. `test_runtime_001_struct_runtime_executes_instantiation` ⏸️ IGNORED
3. `test_runtime_001_struct_runtime_field_access` ⏸️ IGNORED
4. `test_runtime_001_struct_runtime_value_semantics` ⏸️ IGNORED

**Implementation Gap**: Runtime evaluation for `Value::Struct` not implemented.

---

### Classes - Baseline Status

**Parser**: ✅ WORKING
```rust
// Test: test_runtime_001_class_parser_accepts_definition
// Status: PASSING
ruchy -e "class Person { name: String, age: i32 }; 42"
// Result: SUCCESS - parser accepts class definitions
```

**Runtime**: ❌ NOT WORKING (all tests ignored - RED phase)
```rust
// Test: test_runtime_001_class_runtime_executes_instantiation
// Status: IGNORED (will fail if un-ignored)
ruchy -e "class Person { name: String, age: i32 init(name: String, age: i32) { self.name = name; self.age = age; } }; let person = Person(name: \"Alice\", age: 30); println!(person.name)"
// Expected: Print "Alice"
// Actual: Runtime error (class instantiation not implemented)
```

**Tests Documented**:
1. `test_runtime_001_class_parser_accepts_definition` ✅ PASSING
2. `test_runtime_001_class_runtime_executes_instantiation` ⏸️ IGNORED
3. `test_runtime_001_class_runtime_reference_semantics` ⏸️ IGNORED
4. `test_runtime_001_class_runtime_identity_comparison` ⏸️ IGNORED

**Implementation Gap**: Runtime evaluation for `Value::Class` and reference semantics not implemented.

---

### Actors - Baseline Status

**Parser**: ✅ WORKING
```rust
// Test: test_runtime_001_actor_parser_accepts_definition
// Status: PASSING
ruchy -e "actor Counter { count: i32 receive { Increment => self.count += 1, GetCount => self.count } }; 42"
// Result: SUCCESS - parser accepts actor definitions
```

**Runtime**: ❌ NOT WORKING (all tests ignored - RED phase)
```rust
// Test: test_runtime_001_actor_runtime_spawn_and_send
// Status: IGNORED (will fail if un-ignored)
ruchy -e "actor Counter { count: i32 receive { Increment => self.count += 1, GetCount => self.count } }; let counter = Counter.spawn(); counter.send(Increment); let result = counter.ask(GetCount); println!(result)"
// Expected: Print "2"
// Actual: Runtime error (actor spawn/send not implemented)
```

**Tests Documented**:
1. `test_runtime_001_actor_parser_accepts_definition` ✅ PASSING
2. `test_runtime_001_actor_runtime_spawn_and_send` ⏸️ IGNORED

**Implementation Gap**: Actor runtime, spawn(), send(), ask() not implemented.

---

### Async/Await - Baseline Status

**Parser**: ❌ NOT WORKING
```rust
// Test: test_runtime_001_async_parser_accepts_async_fn
// Status: IGNORED (fails if un-ignored)
ruchy -e "async fn fetch_data() -> String { \"data\" }; 42"
// Expected: Parser accepts async keyword
// Actual: Error: Expected 'fun', '{', '|', or identifier after 'async'
```

**Runtime**: ❌ NOT IMPLEMENTED (blocked by parser)
```rust
// Cannot test runtime because parser doesn't accept async keyword
```

**Tests Documented**:
1. `test_runtime_001_async_parser_accepts_async_fn` ⏸️ IGNORED (parser rejects)
2. `test_runtime_001_async_parser_accepts_await` ⏸️ IGNORED (parser rejects)
3. `test_runtime_001_async_runtime_executes_async_fn` ⏸️ IGNORED (blocked)
4. `test_runtime_001_async_runtime_concurrent_execution` ⏸️ IGNORED (blocked)

**Implementation Gap**:
1. Parser does not recognize `async` keyword
2. Parser does not recognize `await` keyword
3. Runtime has no async evaluation logic
4. No tokio/async runtime integration

**Blocker**: Must implement parser support for `async` and `await` keywords BEFORE runtime implementation.

---

## Implementation Priority (Revised)

Based on baseline audit findings, implementation priority is:

### 1. Structs (HIGHEST PRIORITY)
**Reason**: Parser works, simplest runtime implementation
**Effort**: 4-6 hours
**Value**: High (value types are fundamental)
**Blocker Status**: None
**Ticket**: RUNTIME-002

### 2. Classes (HIGH PRIORITY)
**Reason**: Parser works, requires reference semantics
**Effort**: 6-8 hours
**Value**: High (reference types enable many patterns)
**Blocker Status**: None (can implement independently)
**Ticket**: RUNTIME-003

### 3. Actors (MEDIUM PRIORITY)
**Reason**: Parser works, requires message-passing infrastructure
**Effort**: 8-12 hours
**Value**: Medium (enables concurrency patterns)
**Blocker Status**: None (can use std::sync::mpsc without async)
**Ticket**: RUNTIME-004

### 4. Async/Await (LOW PRIORITY - BLOCKED)
**Reason**: Parser does NOT work, requires both parser AND runtime
**Effort**: 12-20 hours (parser + runtime + tokio integration)
**Value**: High (enables async I/O)
**Blocker Status**: **BLOCKED by parser implementation**
**Ticket**: RUNTIME-005

**Recommendation**: Deprioritize Async/Await until Structs/Classes/Actors complete.

---

## Next Steps

### Immediate (RUNTIME-002)
1. ✅ Baseline audit complete
2. 🚀 Implement `Value::Struct` runtime representation
3. 🚀 Implement struct instantiation evaluation
4. 🚀 Implement field access evaluation
5. 🚀 Implement value semantics (copy on assign)
6. 🚀 Write 10K+ property tests for struct invariants
7. 🚀 Run mutation tests (≥75% score)

### Follow-up (RUNTIME-003)
- Implement `Value::Class` with Arc<RefCell<>>
- Implement reference semantics
- Implement identity comparison (===)

### Blocked (RUNTIME-005)
- DO NOT START until parser implements `async` and `await` keywords
- Consider creating separate ticket for parser implementation first

---

## Test Execution

**Run baseline audit**:
```bash
cargo test runtime_001 --test runtime_baseline_audit -- --nocapture
```

**Expected Results**:
- 4 tests PASSING (3 parser + 1 summary)
- 11 tests IGNORED (9 runtime + 2 async parser)
- 0 tests FAILING

**Status**: ✅ PASSING (as expected)

---

## Files Created

1. `tests/runtime_baseline_audit.rs` - 227 lines of baseline tests
2. `docs/execution/runtime-baseline.md` - This document

---

## Acceptance Criteria for RUNTIME-001

- [x] All parser tests passing (features that should parse, do parse)
- [x] All runtime tests ignored with proper RED phase markers
- [x] Baseline documented in `docs/execution/runtime-baseline.md`
- [x] Prioritized implementation order determined
- [x] Critical findings documented (async/await parser issue)

**Status**: ✅ RUNTIME-001 COMPLETE

**Next Ticket**: RUNTIME-002 (Implement Structs)

---

**Generated**: 2025-10-13
**Sprint**: sprint-runtime-001
**Toyota Way**: Genchi Genbutsu - Go and see the actual state, don't assume
