Array<T>: count and rest constructors (#53)

`new Array<number>(10)` makes ten elements and `new Array(10, 20, 30)` those three,
beside `new Array([..])`. Needs the compiler's constructor-overload inference (#715)
and optional-parameter overload fit (#716).

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Author: ASDAlexander77

src/generics/lib.generics.ts

@@ -449,14 +449,14 @@ class Array<T> {
     constructor(private data: T[] = []) {
     }
 
-    // constructor(count: int = 0) {
-    //     this.data = [];
-    //     this.data.length = count;
-    // }
-
-    // constructor(...args: T[]) {
-    //     this.data = args;
-    // }
+    constructor(count: int = 0) {
+        this.data = [];
+        this.data.length = count;
+    }
+
+    constructor(...args: T[]) {
+        this.data = args;
+    }
 
     public [index: int]: T;
 

tests/array_constructors_overload.ts

@@ -0,0 +1,12 @@
+function main() {
+
+    const a = new Array<number>(10);
+
+    assert(a.length === 10 && a[0] === 0);
+
+    const b = new Array(10, 20, 30);
+
+    assert(b.length === 3 && b[0] === 10 && b[1] === 20 && b[2] === 30);
+
+    console.log("ALL DONE");
+}