Phase 6 features:
- ForIn reactive list rendering: for item in items -> body
- Optional index binding: for item, idx in items -> body
- Component declarations: component Name(props) = body
- Component instantiation: ComponentUse { name, props }
Added across 5 crates:
- ds-parser: For/In/Component tokens, ForIn/ComponentDecl AST nodes
- ds-codegen: reactive list effect, component function emission
- ds-types: ForIn/ComponentUse type inference
- local_vars tracking for non-reactive for-in loop vars
Includes examples/list.ds showcasing for-in + when + signals.
- File watcher thread using notify crate (100ms debounce)
- Auto-recompiles .ds files on change with timed output
- Poll-based HMR: client fetches /__hmr every 500ms for version
- Injects HMR script into compiled HTML before </body>
- Error pages rendered with DreamStack styling on compile failure
- Version counter shared between watcher and HTTP server via AtomicU64
Interactive page comparing 5 unique DreamStack capabilities vs React/Svelte/Solid/Vue:
1. Reactivity as a type (Signal<T> in the type system)
2. Algebraic effects (swappable side-effect handlers)
3. Springs are signals (physics auto-propagates through reactive graph)
4. Compile-time dependency graph (static analysis, dead signal elimination)
5. Constraint-based layout (Cassowary solver, not CSS hacks)
Includes live spring physics demo, interactive constraint layout toggle,
side-by-side code comparisons, Elm-style error previews, and comparison table.
Full todo app using DreamStack's signal runtime:
- Add/toggle/remove individual todos
- Filter by all/active/completed
- Clear completed batch action
- Derived reactive stats (total, active, done counts)
- Premium dark theme with glassmorphism, slide-in animations
- No VDOM, no re-renders — pure signal propagation
