M.V. Hutz
9c7fb8ceba
## Description The codebase previously used "interpreter" terminology and standalone functions for expression operations. This PR modernizes the architecture by renaming to "runtime" and converting operations to receiver methods. - Rename `pkg/interpreter` to `pkg/runtime`. - Move `ReduceOnce` to new `pkg/normalorder` package for reduction strategy isolation. - Convert standalone functions (`Substitute`, `Rename`, `GetFree`, `IsFree`) to receiver methods on concrete expression types. - Change `Set` from pointer receivers to value receivers for simpler usage. - Update all references from "interpreter" to "runtime" terminology throughout the codebase. ### Decisions - Operations like `Substitute`, `Rename`, `GetFree`, and `IsFree` are now methods on the `Expression` interface, implemented by each concrete type (`Variable`, `Abstraction`, `Application`). - The `normalorder` package isolates the normal-order reduction strategy, allowing future reduction strategies to be added in separate packages. - `Set` uses value receivers since Go maps are reference types and don't require pointer semantics. ## Benefits - Cleaner API: `expr.Substitute(target, replacement)` instead of `Substitute(expr, target, replacement)`. - Better separation of concerns: reduction strategies are isolated from expression types. - Consistent terminology: "runtime" better reflects the execution model. - Simpler `Set` usage without needing to manage pointers. ## Checklist - [x] Code follows conventional commit format. - [x] Branch follows naming convention (`<type>/<description>`). Always use underscores. - [x] Tests pass (if applicable). - [x] Documentation updated (if applicable). Reviewed-on: #39 Co-authored-by: M.V. Hutz <git@maximhutz.me> Co-committed-by: M.V. Hutz <git@maximhutz.me>
47 lines
941 B
Go
47 lines
941 B
Go
package emitter
|
|
|
|
import "git.maximhutz.com/max/lambda/pkg/set"
|
|
|
|
type Emitter[E comparable] interface {
|
|
On(E, func()) Listener[E]
|
|
Off(Listener[E])
|
|
Emit(E)
|
|
}
|
|
|
|
type BaseEmitter[E comparable] struct {
|
|
listeners map[E]set.Set[Listener[E]]
|
|
}
|
|
|
|
func (e *BaseEmitter[E]) On(kind E, fn func()) Listener[E] {
|
|
if e.listeners[kind] == nil {
|
|
e.listeners[kind] = set.New[Listener[E]]()
|
|
}
|
|
|
|
listener := &BaseListener[E]{kind, fn}
|
|
e.listeners[kind].Add(listener)
|
|
return listener
|
|
}
|
|
|
|
func (e *BaseEmitter[E]) Off(listener Listener[E]) {
|
|
kind := listener.Kind()
|
|
if e.listeners[kind] != nil {
|
|
e.listeners[kind].Remove(listener)
|
|
}
|
|
}
|
|
|
|
func (e *BaseEmitter[E]) Emit(event E) {
|
|
if e.listeners[event] == nil {
|
|
e.listeners[event] = set.New[Listener[E]]()
|
|
}
|
|
|
|
for listener := range e.listeners[event].Items() {
|
|
listener.Run()
|
|
}
|
|
}
|
|
|
|
func New[E comparable]() *BaseEmitter[E] {
|
|
return &BaseEmitter[E]{
|
|
listeners: map[E]set.Set[Listener[E]]{},
|
|
}
|
|
}
|