[dsch] drafts

Author: DScheglov

.eslintrc.json

@@ -0,0 +1,32 @@
+import { Caster, OkType } from './types.js';
+
+type CasterFactory<Args extends any[], R> = (...args: Args) => Caster<R>;
+
+type WrappedFactory<F extends CasterFactory<any, any>> = (
+  ...args: Parameters<F>
+) => Caster<OkType<ReturnType<F>>>;
+
+export interface Deserializer<P> extends Caster<P> {
+  to<T>(caster: Caster<T>): Caster<T>;
+  to<F extends CasterFactory<any, any>>(factory: F): WrappedFactory<F>;
+}
+
+export const deserialize = <P>(parser: Caster<P>): Deserializer<P> => {
+  const result = parser as any;
+
+  result.to = (target: any) => {
+    if (typeof target === 'function' && 'chain' in target) {
+      const caster = target as Caster<any>;
+      const name = `${parser.name} |> ${caster.name}`;
+      return parser.chain(caster, name);
+    }
+
+    return (...args: any[]) => {
+      const caster = target(...args);
+      const name = `${parser.name} |> ${caster.name}`;
+      return parser.chain(caster, name);
+    };
+  };
+
+  return result as Deserializer<P>;
+};

src/deserialize.ts

@@ -13,3 +13,5 @@ export * from './text.js';
 export * from './types.js';
 export * from './casting-error.js';
 export * from './date.js';
+export * from './deserialize.js';
+