wren/test/language/method/subscript_operators.wren

class Foo {
  construct new() {}
  [a] { "1-subscript %(a)" }
  [a, b] { "2-subscript %(a) %(b)" }
  [a, b, c] { "3-subscript %(a) %(b) %(c)" }
  [a]=(value) { "1-subscript setter %(a) = %(value)" }
  [a, b]=(value) { "2-subscript setter %(a) %(b) = %(value)" }
  [a, b, c]=(value) { "3-subscript setter %(a) %(b) %(c) = %(value)" }
}

var foo = Foo.new()
System.print(foo["a"]) // expect: 1-subscript a
System.print(foo["a", "b"]) // expect: 2-subscript a b
System.print(foo["a", "b", "c"]) // expect: 3-subscript a b c
System.print(foo["a"] = "value") // expect: 1-subscript setter a = value
System.print(foo["a", "b"] = "value") // expect: 2-subscript setter a b = value
System.print(foo["a", "b", "c"] = "value") // expect: 3-subscript setter a b c = value
User-defined subscript operators. 2015-01-20 18:25:54 -08:00			`class Foo {`
No more default constructors. Fixes #296. 2015-09-01 08:16:04 -07:00			`construct new() {}`
Simple string interpolation. This allows "%(...)" inside a string literal to interpolate the stringified result of an expression. It doesn't support custom interpolators or format strings, but we can consider extending that later. 2015-11-11 07:55:48 -08:00			`[a] { "1-subscript %(a)" }`
			`[a, b] { "2-subscript %(a) %(b)" }`
			`[a, b, c] { "3-subscript %(a) %(b) %(c)" }`
			`[a]=(value) { "1-subscript setter %(a) = %(value)" }`
			`[a, b]=(value) { "2-subscript setter %(a) %(b) = %(value)" }`
			`[a, b, c]=(value) { "3-subscript setter %(a) %(b) %(c) = %(value)" }`
User-defined subscript operators. 2015-01-20 18:25:54 -08:00			`}`

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. 2015-07-10 09:18:22 -07:00			`var foo = Foo.new()`
"IO" -> "System". Get rid of the separate opt-in IO class and replace it with a core System class. - Remove wren_io.c, wren_io.h, and io.wren. - Remove the flags that disable it. - Remove the overloads for print() with different arity. (It was an experiment, but I don't think it's that useful.) - Remove IO.read(). That will reappear using libuv in the CLI at some point. - Remove IO.time. Doesn't seem to have been used. - Update all of the tests, docs, etc. I'm sorry for all the breakage this causes, but I think "System" is a better name for this class (it makes it natural to add things like "System.gc()") and frees up "IO" for referring to the CLI's IO module. 2015-09-15 07:46:09 -07:00			`System.print(foo["a"]) // expect: 1-subscript a`
			`System.print(foo["a", "b"]) // expect: 2-subscript a b`
			`System.print(foo["a", "b", "c"]) // expect: 3-subscript a b c`
			`System.print(foo["a"] = "value") // expect: 1-subscript setter a = value`
			`System.print(foo["a", "b"] = "value") // expect: 2-subscript setter a b = value`
			`System.print(foo["a", "b", "c"] = "value") // expect: 3-subscript setter a b c = value`