feat: simple loadprg implementation

src/program/Loadprg.ts

@@ -3,21 +3,30 @@ import type { SimpleStream } from '../utils/SimpleStream'
 import { Program } from './Program'
 
 export class Loadprg extends Program {
-    // private wush: Wush
+    private wush: Wush
 
-    constructor(_: Wush) {
+    constructor(wush: Wush) {
         super()
-        // this.wush = wush
+        this.wush = wush
     }
 
     async Exec(_: SimpleStream<string>, stdout: SimpleStream<string>, args: string[]): Promise<number> {
-        stdout.emit('Not implemented yet.\n')
+        // stdout.emit('Not implemented yet.\n')
-        return 0
+        // return 0
 
-        const javascript = args.slice(1).join(' ')
+        const javascript = args.slice(2).join(' ')
 
         try {
-            eval(javascript)
+            const exec: Function = eval(javascript)
+
+            const program = class extends Program {
+                async Exec(stdin: SimpleStream<string>, stdout: SimpleStream<string>, args: string[]): Promise<number> {
+                    exec(stdin, stdout, args)
+                    return 0
+                }
+            }
+
+            this.wush.LoadProgram(new program(), args[1])
         } catch (e) {
             stdout.emit(`${String(e)}\n`)
             stdout.emit(`${String((e as Error).stack)}\n`)