Add initial Date bindings

Doesn't do much, yet, because we can't get the timezone with a plain binding, but it's at least something.

std/assembly/bindings/Date.ts

@@ -0,0 +1,10 @@
+export declare function UTC(
+  year: i32,
+  month: i32,
+  day: i32,
+  hour: i32,
+  minute: i32,
+  second: i32,
+  millisecond: i32
+): f64;
+export declare function now(): f64;

std/assembly/date.ts

@@ -0,0 +1,37 @@
+import {
+  UTC as Date_UTC,
+  now as Date_now
+} from "./bindings/Date";
+
+export class Date {
+
+  @inline static UTC(
+    year: i32,
+    month: i32 = 0,
+    day: i32 = 1,
+    hour: i32 = 0,
+    minute: i32 = 0,
+    second: i32 = 0,
+    millisecond: i32 = 0
+  ): i64 {
+    return <i64>Date_UTC(year, month, day, hour, minute, second, millisecond);
+  }
+
+  @inline static now(): i64 {
+    return <i64>Date_now();
+  }
+
+  private value: i64;
+
+  constructor(value: i64) {
+    this.value = value;
+  }
+
+  getTime(): i64 {
+    return this.value;
+  }
+
+  setTime(value: i64): void {
+    this.value = value;
+  }
+}

std/assembly/index.d.ts

@@ -657,6 +657,27 @@ declare const Math: IMath<f64>;
 /** Alias of {@link NativeMathf} or {@link JSMath} respectively. Defaults to `NativeMathf`. */
 declare const Mathf: IMath<f32>;
 
+declare class Date {
+  /** Returns the UTC timestamp in milliseconds of the specified date. */
+  static UTC(
+    year: i32,
+    month: i32,
+    day: i32,
+    hour: i32,
+    minute: i32,
+    second: i32,
+    millisecond: i32
+  ): i64;
+  /** Returns the current UTC timestamp in milliseconds. */
+  static now(): i64;
+  /** Constructs a new date object from an UTC timestamp in milliseconds. */
+  constructor(value: i64);
+  /** Returns the UTC timestamp of this date in milliseconds. */
+  getTime(): i64;
+  /** Sets the UTC timestamp of this date in milliseconds. */
+  setTime(value: i64): void;
+}
+
 /** Environmental tracing function for debugging purposes. */
 declare function trace(msg: string, n?: i32, a0?: f64, a1?: f64, a2?: f64, a3?: f64, a4?: f64): void;
 

std/portable/index.d.ts

@@ -424,6 +424,27 @@ declare const Math: IMath;
 declare const Mathf: IMath;
 declare const JSMath: IMath;
 
+declare class Date {
+  /** Returns the UTC timestamp in milliseconds of the specified date. */
+  static UTC(
+    year: i32,
+    month: i32,
+    day: i32,
+    hour: i32,
+    minute: i32,
+    second: i32,
+    millisecond: i32
+  ): number;
+  /** Returns the current UTC timestamp in milliseconds. */
+  static now(): number;
+  /** Constructs a new date object from an UTC timestamp in milliseconds. */
+  constructor(value: number);
+  /** Returns the UTC timestamp of this date in milliseconds. */
+  getTime(): number;
+  /** Sets the UTC timestamp of this date in milliseconds. */
+  setTime(value: number): void;
+}
+
 declare namespace console {
   /** @deprecated */
   function log(message: string): void;