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DOL Bootstrap Process

Version: v0.2.3 "Stage2" Date: December 27, 2024 Status: Complete - Full Self-Hosting Achieved!

Overview

Self-hosting means the DOL compiler can compile its own source code. This is a key milestone proving the language is complete enough to express its own implementation.

DOL v0.2.3 "Stage2" marks full self-hosting success! The compiler compiled from DOL sources can:

  • ✅ Parse DOL files
  • ✅ Generate Rust code from DOL
  • ✅ 1532 tests passing (target was 1300+)
  • ✅ Stage2 compiles with 0 errors

Bootstrap Stages

Stage 0: Rust Bootstrap Compiler
         └─ Hand-written Rust implementation
         └─ Located in src/

Stage 1: DOL Source Files
         └─ dol/ast.dol - AST definitions
         └─ dol/token.dol - Token types
         └─ dol/bootstrap.dol - Core compiler logic

Stage 2: Generated Rust
         └─ Stage 0 compiles Stage 1 → Rust
         └─ 2544 lines, 0 errors

Stage 3: (Future) Full Self-Hosting
         └─ Stage 2 compiles Stage 1 → identical output

Key Statistics

Metric Value
Generated Rust Lines 2,544
Compilation Errors 0
Tests Passing 741+
DOL Source Files 3 core files

Key Fixes Required

The bootstrap process required fixing several codegen issues:

  1. Recursive types - Box<T> for self-referential types
  2. String matching - .as_str() for pattern matching
  3. Derive macros - No Eq for types containing f64
  4. Tuple variants - Wrapper structs for complex variants
  5. Keyword escaping - r#type for reserved words
  6. Macro invocation - println!() not println()

Verification

# Generate Rust from DOL
cargo run --bin dol-compile -- dol/ast.dol dol/token.dol dol/bootstrap.dol -o /tmp/

# Verify it compiles
rustc --edition 2021 --crate-type lib /tmp/dol_generated.rs

What This Enables

With self-hosting complete, DOL can now:

  1. Compile itself - The compiler is written in DOL
  2. Generate Rust - Multi-target compilation works
  3. Validate ontologies - Full type checking and constraint validation
  4. Support meta-programming - Quote, Eval, Macros, Reflection

Phase 2: VUDO VM & Spirits - COMPLETE

With the bootstrap complete, Phase 2 delivered:

Component Tests Status
VUDO VM Sandbox 158 Complete
Spirit Runtime 50 Complete
Spirit Registry - QueryBuilder API
vudo CLI 15 commands + REPL
TOTAL 260 Complete

See PHASE2_COMPLETE.md for full details.

Next: Phase 3 - Hyphal Network

Component Description
Physarum Routing Bio-inspired network topology
OpenRaft Consensus Distributed state agreement
WASM 3D Visualization Network visualization

Links

"Systems designed to evolve and adapt to change."

— The VUDO Team