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/language/function/empty_body.wren

@@ -1,2 +1,2 @@
-var f = new Fn {}
+var f = Fn.new {}
 IO.print(f.call()) // expect: null

test/language/function/newline_body.wren

@@ -1,4 +1,4 @@
-var f = new Fn {
+var f = Fn.new {
   // Hi.
 }
 IO.print(f.call()) // expect: null

test/language/function/no_newline_before_close.wren

@@ -1,2 +1,2 @@
-new Fn {
+Fn.new {
   IO.print("ok") } // expect error

test/language/function/no_parameters.wren

@@ -1 +1 @@
-new Fn {|| null } // expect error
+Fn.new {|| null } // expect error

test/language/function/parameters.wren

@@ -1,50 +1,50 @@
-var f0 = new Fn { 0 }
+var f0 = Fn.new { 0 }
 IO.print(f0.call()) // expect: 0
 
-var f1 = new Fn {|a| a }
+var f1 = Fn.new {|a| a }
 IO.print(f1.call(1)) // expect: 1
 
-var f2 = new Fn {|a, b| a + b }
+var f2 = Fn.new {|a, b| a + b }
 IO.print(f2.call(1, 2)) // expect: 3
 
-var f3 = new Fn {|a, b, c| a + b + c }
+var f3 = Fn.new {|a, b, c| a + b + c }
 IO.print(f3.call(1, 2, 3)) // expect: 6
 
-var f4 = new Fn {|a, b, c, d| a + b + c + d }
+var f4 = Fn.new {|a, b, c, d| a + b + c + d }
 IO.print(f4.call(1, 2, 3, 4)) // expect: 10
 
-var f5 = new Fn {|a, b, c, d, e| a + b + c + d + e }
+var f5 = Fn.new {|a, b, c, d, e| a + b + c + d + e }
 IO.print(f5.call(1, 2, 3, 4, 5)) // expect: 15
 
-var f6 = new Fn {|a, b, c, d, e, f| a + b + c + d + e + f }
+var f6 = Fn.new {|a, b, c, d, e, f| a + b + c + d + e + f }
 IO.print(f6.call(1, 2, 3, 4, 5, 6)) // expect: 21
 
-var f7 = new Fn {|a, b, c, d, e, f, g| a + b + c + d + e + f + g }
+var f7 = Fn.new {|a, b, c, d, e, f, g| a + b + c + d + e + f + g }
 IO.print(f7.call(1, 2, 3, 4, 5, 6, 7)) // expect: 28
 
-var f8 = new Fn {|a, b, c, d, e, f, g, h| a + b + c + d + e + f + g + h }
+var f8 = Fn.new {|a, b, c, d, e, f, g, h| a + b + c + d + e + f + g + h }
 IO.print(f8.call(1, 2, 3, 4, 5, 6, 7, 8)) // expect: 36
 
-var f9 = new Fn {|a, b, c, d, e, f, g, h, i| a + b + c + d + e + f + g + h + i }
+var f9 = Fn.new {|a, b, c, d, e, f, g, h, i| a + b + c + d + e + f + g + h + i }
 IO.print(f9.call(1, 2, 3, 4, 5, 6, 7, 8, 9)) // expect: 45
 
-var f10 = new Fn {|a, b, c, d, e, f, g, h, i, j| a + b + c + d + e + f + g + h + i + j }
+var f10 = Fn.new {|a, b, c, d, e, f, g, h, i, j| a + b + c + d + e + f + g + h + i + j }
 IO.print(f10.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)) // expect: 55
 
-var f11 = new Fn {|a, b, c, d, e, f, g, h, i, j, k| a + b + c + d + e + f + g + h + i + j + k }
+var f11 = Fn.new {|a, b, c, d, e, f, g, h, i, j, k| a + b + c + d + e + f + g + h + i + j + k }
 IO.print(f11.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11)) // expect: 66
 
-var f12 = new Fn {|a, b, c, d, e, f, g, h, i, j, k, l| a + b + c + d + e + f + g + h + i + j + k + l }
+var f12 = Fn.new {|a, b, c, d, e, f, g, h, i, j, k, l| a + b + c + d + e + f + g + h + i + j + k + l }
 IO.print(f12.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)) // expect: 78
 
-var f13 = new Fn {|a, b, c, d, e, f, g, h, i, j, k, l, m| a + b + c + d + e + f + g + h + i + j + k + l + m }
+var f13 = Fn.new {|a, b, c, d, e, f, g, h, i, j, k, l, m| a + b + c + d + e + f + g + h + i + j + k + l + m }
 IO.print(f13.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)) // expect: 91
 
-var f14 = new Fn {|a, b, c, d, e, f, g, h, i, j, k, l, m, n| a + b + c + d + e + f + g + h + i + j + k + l + m + n }
+var f14 = Fn.new {|a, b, c, d, e, f, g, h, i, j, k, l, m, n| a + b + c + d + e + f + g + h + i + j + k + l + m + n }
 IO.print(f14.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)) // expect: 105
 
-var f15 = new Fn {|a, b, c, d, e, f, g, h, i, j, k, l, m, n, o| a + b + c + d + e + f + g + h + i + j + k + l + m + n + o }
+var f15 = Fn.new {|a, b, c, d, e, f, g, h, i, j, k, l, m, n, o| a + b + c + d + e + f + g + h + i + j + k + l + m + n + o }
 IO.print(f15.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)) // expect: 120
 
-var f16 = new Fn {|a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p| a + b + c + d + e + f + g + h + i + j + k + l + m + n + o + p }
+var f16 = Fn.new {|a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p| a + b + c + d + e + f + g + h + i + j + k + l + m + n + o + p }
 IO.print(f16.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)) // expect: 136

test/language/function/syntax.wren

@@ -1,19 +1,19 @@
 // Single expression body.
-new Fn { IO.print("ok") }.call() // expect: ok
+Fn.new { IO.print("ok") }.call() // expect: ok
 
 // Curly body.
-new Fn {
+Fn.new {
   IO.print("ok") // expect: ok
 }.call()
 
 // Multiple statements.
-new Fn {
+Fn.new {
   IO.print("1") // expect: 1
   IO.print("2") // expect: 2
 }.call()
 
 // Extra newlines.
-new Fn {
+Fn.new {
 
 
   IO.print("1") // expect: 1