Make constructors just methods.

* Eliminate "new" reserved word.
* Allow "this" before a method definition to define a constructor.
* Only create a default constructor for classes that don't define one.

test/core/fiber/abort.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   Fiber.abort("Error message.")
 }
 

test/core/fiber/call.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("fiber")
 }
 

test/core/fiber/call_direct_reenter.wren

@@ -1,6 +1,6 @@
 var fiber
 
-fiber = new Fiber {
+fiber = Fiber.new {
   fiber.call() // expect runtime error: Fiber has already been called.
 }
 

test/core/fiber/call_indirect_reenter.wren

@@ -1,11 +1,11 @@
 var a
 var b
 
-a = new Fiber {
+a = Fiber.new {
   b.call() // expect runtime error: Fiber has already been called.
 }
 
-b = new Fiber {
+b = Fiber.new {
   a.call()
 }
 

test/core/fiber/call_return_implicit_null.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("fiber")
 }
 

test/core/fiber/call_return_value.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("fiber")
   return "result"
 }

test/core/fiber/call_when_done.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("call")
 }
 

test/core/fiber/call_with_value.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("fiber")
 }
 

test/core/fiber/call_with_value_direct_reenter.wren

@@ -1,6 +1,6 @@
 var fiber
 
-fiber = new Fiber {
+fiber = Fiber.new {
   fiber.call(2) // expect runtime error: Fiber has already been called.
 }
 

test/core/fiber/call_with_value_indirect_reenter.wren

@@ -1,11 +1,11 @@
 var a
 var b
 
-a = new Fiber {
+a = Fiber.new {
   b.call(3) // expect runtime error: Fiber has already been called.
 }
 
-b = new Fiber {
+b = Fiber.new {
   a.call(2)
 }
 

test/core/fiber/call_with_value_when_done.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("call")
 }
 

test/core/fiber/error.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   "s".unknown
 }
 

test/core/fiber/is_done.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("1")
   Fiber.yield()
   IO.print("2")

test/core/fiber/is_done_after_error.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   "s".unknown
 }
 

test/core/fiber/new_wrong_arg_type.wren

@@ -1 +1 @@
-var fiber = new Fiber("not fn") // expect runtime error: Argument must be a function.
+var fiber = Fiber.new("not fn") // expect runtime error: Argument must be a function.

test/core/fiber/resume_caller.wren

@@ -1,8 +1,8 @@
-var b = new Fiber {
+var b = Fiber.new {
   IO.print("fiber b")
 }
 
-var a = new Fiber {
+var a = Fiber.new {
   IO.print("begin fiber a")
   b.call()
   IO.print("end fiber a")

test/core/fiber/run.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("fiber")
 }
 

test/core/fiber/run_direct_reenter.wren

@@ -1,6 +1,6 @@
 var fiber
 
-fiber = new Fiber {
+fiber = Fiber.new {
   IO.print(1) // expect: 1
   fiber.run()
   IO.print(2) // expect: 2

test/core/fiber/run_indirect_reenter.wren

@@ -1,13 +1,13 @@
 var a
 var b
 
-a = new Fiber {
+a = Fiber.new {
   IO.print(2)
   b.run()
   IO.print("nope")
 }
 
-b = new Fiber {
+b = Fiber.new {
   IO.print(1)
   a.run()
   IO.print(3)

test/core/fiber/run_when_done.wren

@@ -1,10 +1,10 @@
-var a = new Fiber {
+var a = Fiber.new {
   IO.print("run")
 }
 
 // Run a through an intermediate fiber since it will get discarded and we need
 // to return to the main one after a completes.
-var b = new Fiber {
+var b = Fiber.new {
   a.run()
   IO.print("nope")
 }

test/core/fiber/run_with_value.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("fiber")
 }
 

test/core/fiber/run_with_value_direct_reenter.wren

@@ -1,6 +1,6 @@
 var fiber
 
-fiber = new Fiber {
+fiber = Fiber.new {
   IO.print(1) // expect: 1
   fiber.run("ignored")
   IO.print(2) // expect: 2

test/core/fiber/run_with_value_indirect_reenter.wren

@@ -1,13 +1,13 @@
 var a
 var b
 
-a = new Fiber {
+a = Fiber.new {
   IO.print(2)
   b.run("ignored")
   IO.print("nope")
 }
 
-b = new Fiber {
+b = Fiber.new {
   IO.print(1)
   a.run("ignored")
   IO.print(3)

test/core/fiber/try.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("before")
   true.unknownMethod
   IO.print("after")

test/core/fiber/try_direct_reenter.wren

@@ -1,6 +1,6 @@
 var fiber
 
-fiber = new Fiber {
+fiber = Fiber.new {
   fiber.try() // expect runtime error: Fiber has already been called.
 }
 

test/core/fiber/try_indirect_reenter.wren

@@ -1,11 +1,11 @@
 var a
 var b
 
-a = new Fiber {
+a = Fiber.new {
   b.try() // expect runtime error: Fiber has already been called.
 }
 
-b = new Fiber {
+b = Fiber.new {
   a.call()
 }
 

test/core/fiber/try_when_done.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("try")
 }
 

test/core/fiber/try_without_error.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("fiber")
 }
 

test/core/fiber/type.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {}
+var fiber = Fiber.new {}
 IO.print(fiber is Fiber)      // expect: true
 IO.print(fiber is Object)     // expect: true
 IO.print(fiber is Bool)       // expect: false

test/core/fiber/yield.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("fiber 1")
   Fiber.yield()
   IO.print("fiber 2")

test/core/fiber/yield_return_call_value.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("fiber 1")
   var result = Fiber.yield()
   IO.print(result)

test/core/fiber/yield_return_run_value.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("fiber")
   var result = Fiber.yield()
   IO.print(result)

test/core/fiber/yield_with_no_caller.wren

@@ -1,11 +1,11 @@
-var a = new Fiber {
+var a = Fiber.new {
   IO.print("before") // expect: before
   Fiber.yield()
 }
 
 // Run a chain of fibers. Since none of them are called, they all get discarded
 // and there is no remaining caller.
-var b = new Fiber { a.run() }
-var c = new Fiber { b.run() }
+var b = Fiber.new { a.run() }
+var c = Fiber.new { b.run() }
 c.run()
 IO.print("not reached")

test/core/fiber/yield_with_value.wren

@@ -1,4 +1,4 @@
-var fiber = new Fiber {
+var fiber = Fiber.new {
   IO.print("fiber 1")
   Fiber.yield("yield 1")
   IO.print("fiber 2")

test/core/fiber/yield_with_value_with_no_caller.wren

@@ -1,11 +1,11 @@
-var a = new Fiber {
+var a = Fiber.new {
   IO.print("before") // expect: before
   Fiber.yield(1)
 }
 
 // Run a chain of fibers. Since none of them are called, they all get discarded
 // and there is no remaining caller.
-var b = new Fiber { a.run() }
-var c = new Fiber { b.run() }
+var b = Fiber.new { a.run() }
+var c = Fiber.new { b.run() }
 c.run()
 IO.print("not reached")