feat(serializer): add aot serializer

serializer/plugin/descriptors.ts

@@ -0,0 +1,89 @@
+import type { Writer, Reader } from './io.ts';
+
+export type PrimitiveKind =
+  | 'u8' | 'u16' | 'u32'
+  | 'i8' | 'i16' | 'i32'
+  | 'u53' | 'i53'
+  | 'u64' | 'i64'
+  | 'f32' | 'f64'
+  | 'bool'
+  | 'str'
+  | 'bytes';
+
+export type TypedArrayKind = 'f32Array' | 'f64Array' | 'u8Array' | 'u16Array' | 'u32Array' | 'i32Array';
+
+export interface PrimitiveSchema<K extends PrimitiveKind, T> {
+  readonly kind: K;
+  readonly __t?: T;
+}
+
+export interface TypedArraySchema<K extends TypedArrayKind, T> {
+  readonly kind: K;
+  readonly __t?: T;
+}
+
+export interface ArraySchema<E extends AnySchema = AnySchema> {
+  readonly kind: 'array';
+  readonly elem: E;
+}
+
+export interface OptionalSchema<E extends AnySchema = AnySchema> {
+  readonly kind: 'optional';
+  readonly elem: E;
+}
+
+export interface EnumSchema<L extends readonly string[] = readonly string[]> {
+  readonly kind: 'enum';
+  readonly values: L;
+}
+
+export interface BitsetSchema<L extends readonly string[] = readonly string[]> {
+  readonly kind: 'bitset';
+  readonly flags: L;
+}
+
+export interface TupleSchema<E extends readonly AnySchema[] = readonly AnySchema[]> {
+  readonly kind: 'tuple';
+  readonly elems: E;
+}
+
+export interface ObjectSchema<F extends Record<string, AnySchema> = Record<string, AnySchema>> {
+  readonly kind: 'object';
+  readonly name: string;
+  readonly fields: F;
+}
+
+export interface UnionSchema<
+  D extends string = string,
+  V extends Record<string, ObjectSchema> = Record<string, ObjectSchema>,
+> {
+  readonly kind: 'union';
+  readonly name: string;
+  readonly discriminator: D;
+  readonly variants: V;
+}
+
+export interface RefSchema<S extends ObjectSchema = ObjectSchema> {
+  readonly kind: 'ref';
+  readonly thunk: () => S;
+}
+
+export interface CodecSchema<T = unknown> {
+  readonly kind: 'codec';
+  readonly encode: (w: Writer, v: T) => void;
+  readonly decode: (r: Reader) => T;
+  readonly __t?: T;
+}
+
+export type AnySchema =
+  | PrimitiveSchema<PrimitiveKind, unknown>
+  | TypedArraySchema<TypedArrayKind, unknown>
+  | ArraySchema
+  | OptionalSchema
+  | EnumSchema
+  | BitsetSchema
+  | TupleSchema
+  | ObjectSchema
+  | UnionSchema
+  | RefSchema
+  | CodecSchema;