statechart parsing and error reporting working

src/VisualEditor/ast.ts

@@ -0,0 +1,57 @@
+export type AbstractState = {
+  uid: string;
+  children: ConcreteState[];
+}
+
+export type AndState = {
+  kind: "and";
+} & AbstractState;
+
+export type OrState = {
+  kind: "or";
+  // array of tuples: (uid of Arrow indicating initial state, initial state)
+  // in a valid AST, there must be one initial state, but we allow the user to draw crazy shit
+  initial: [string, ConcreteState][]; 
+} & AbstractState;
+
+export type ConcreteState = AndState | OrState;
+
+export type Transition = {
+  uid: string;
+  src: ConcreteState;
+  tgt: ConcreteState;
+  trigger: Trigger;
+  guard: Expression;
+  actions: Action[];
+}
+
+export type EventTrigger = {
+  kind: "event";
+  event: string;
+}
+
+export type AfterTrigger = {
+  kind: "after";
+  delay_ms: number;
+}
+
+export type Trigger = EventTrigger | AfterTrigger;
+
+export type RaiseEvent = {
+  kind: "raise";
+  event: string;
+}
+
+export type Assign = {
+  lhs: string;
+  rhs: Expression;
+}
+
+export type Expression = {};
+
+export type Action = RaiseEvent | Assign;
+
+export type Statechart = {
+  root: ConcreteState;
+  transitions: Map<string, Transition[]>; // key: source state uid
+}