Named, user-defined constructors.

test/ctor_named.wren

@@ -0,0 +1,20 @@
+class Foo {
+  this bar { io.write("this bar") }
+  this baz { io.write("this baz") }
+  this bar(arg) { io.write("this bar " + arg) }
+
+  toString { "Foo" }
+}
+
+// Different names.
+Foo.bar // expect: this bar
+Foo.baz // expect: this baz
+
+// Can overload by arity.
+Foo.bar // expect: this bar
+Foo.bar("one") // expect: this bar one
+
+// Returns the new instance.
+var foo = Foo.bar // expect: this bar
+io.write(foo is Foo) // expect: true
+io.write(foo.toString) // expect: Foo