feat: engram-lang — new programming language, quantum-sealed prod target, spreading activation types

examples/types.el

@@ -0,0 +1,40 @@
+// types.el — Type definitions and pattern matching.
+//
+// Demonstrates:
+//   - type (struct) definitions
+//   - enum definitions with payloads
+//   - match expressions with enum patterns
+
+// A user-defined struct type.
+// Every field is typed; the type name maps to an Engram graph node.
+type User {
+    id: Uuid
+    name: String
+    email: String
+}
+
+// An enum with a payload variant.
+enum Status {
+    Active
+    Inactive
+    Pending(String)
+}
+
+// A function that takes a Status and returns a human-readable string.
+fn describe_status(s: Status) -> String {
+    return match s {
+        Status::Active   => "user is active"
+        Status::Inactive => "user is inactive"
+        Status::Pending(reason) => "pending: " + reason
+    }
+}
+
+// Sealed blocks protect sensitive values even in debug builds.
+// The runtime enforces that values in sealed blocks are never
+// observable through a debugger or memory dump.
+sealed {
+    let api_key: String = "sk-prod-12345"
+}
+
+let status: Status = Status::Pending("email not verified")
+let description: String = describe_status(status)