From ed317e62eb1cf98fde4461fc90c6cb1045ebc7e8 Mon Sep 17 00:00:00 2001
From: Li Jin <dragon-fly@qq.com>
Date: Sat, 25 Jan 2020 17:48:03 +0800
Subject: fix Moonscript issue 375.

---
 README.md                    |  66 ++++++++++++++++--
 spec/inputs/assign.moon      |  24 +++----
 spec/inputs/bubbling.moon    |   8 +--
 spec/inputs/class.moon       | 158 +++++++++++++++++++++----------------------
 spec/inputs/cond.moon        | 104 ++++++++++++++--------------
 spec/inputs/destructure.moon | 112 +++++++++++++++---------------
 spec/inputs/do.moon          |  26 +++----
 spec/inputs/existential.moon |  22 +++++-
 spec/inputs/export.moon      |  90 ++++++++++++------------
 spec/inputs/funcs.moon       | 104 ++++++++++++++--------------
 spec/inputs/import.moon      |  54 +++++++--------
 spec/inputs/lists.moon       |  14 ++--
 spec/inputs/local.moon       | 108 ++++++++++++++---------------
 spec/inputs/loops.moon       | 102 ++++++++++++++--------------
 spec/inputs/operators.moon   |  54 +++++++--------
 spec/inputs/plus.moon        |   6 ++
 spec/inputs/return.moon      |  66 +++++++++---------
 spec/inputs/stub.moon        |   6 +-
 spec/inputs/switch.moon      |  72 ++++++++++----------
 spec/inputs/syntax.moon      |  78 ++++++++++-----------
 spec/inputs/tables.moon      | 138 ++++++++++++++++++-------------------
 spec/inputs/unless_else.moon |   8 +--
 spec/inputs/using.moon       |  16 ++---
 spec/inputs/whitespace.moon  |  70 +++++++++----------
 spec/inputs/with.moon        | 136 ++++++++++++++++++-------------------
 src/MoonP/moon_ast.h         |   3 +-
 src/MoonP/moon_compiler.cpp  |   1 +
 src/MoonP/moon_parser.cpp    |   4 +-
 28 files changed, 867 insertions(+), 783 deletions(-)

diff --git a/README.md b/README.md
index 2385a11..7421829 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # MoonPlus
 
 ![CI](https://github.com/pigpigyyy/MoonPlus/workflows/build-test/badge.svg)  
-MoonPlus is a compiler adopting features from Moonscript language 0.5.0 and could be 2~4 times faster than the original Moonscript compiler. 
+MoonPlus is a compiler with features from Moonscript language 0.5.0 and could be 2~4 times faster than the original Moonscript compiler. 
 
 ## Features
 
@@ -10,19 +10,75 @@ MoonPlus is a compiler adopting features from Moonscript language 0.5.0 and coul
 * Support full Moonscript language features, generate the same Lua codes with original compiler.
 * Reserve line numbers from source Moonscript codes in compiled Lua codes to help with debugging.
 
-## Minor Changes
+## Changes
 
-* Can do slash call with Lua keyword. Generate codes from:
+* Add existential operator support. Generate codes from:
 ```Moonscript
-c.repeat.if\then("xyz")\else res
+func?!
+
+x = tab?.value
+
+print abc?["hello world"]?.xyz
+
+if print and x?
+  print x
 ```
 &emsp;&emsp;to:
+```Lua
+if func ~= nil then
+  func()
+end
+local x
+if tab ~= nil then
+  x = tab.value
+end
+print((function()
+  if abc ~= nil then
+    local _obj_0 = abc["hello world"]
+    if _obj_0 ~= nil then
+      return _obj_0.xyz
+    end
+    return nil
+  end
+  return nil
+end)())
+if print and (x ~= nil) then
+  print(x)
+end
+```
+
+* Can do slash call with Lua keywords. Generate codes from:
 ```Moonscript
+c.repeat.if\then("xyz")\else res
+```
+&emsp;&emsp;to:
+```Lua
 local _call_3 = c["repeat"]["if"]
 local _call_4 = _call_3["then"](_call_3, "xyz")
 _call_4["else"](_call_4, res)
 ```
 
+* Add more usage for `import` keyword. Will compile codes from:
+```Moonscript
+import 'module'
+import "module.part"
+import "d-a-s-h-e-s"
+import "player" as Player
+import "lpeg" as {:C, :Ct, :Cmt}
+```
+&emsp;&emsp;to:
+```Lua
+local module = require('module')
+local part = require("module.part")
+local d_a_s_h_e_s = require("d-a-s-h-e-s")
+local Player = require("player")
+local C, Ct, Cmt
+do
+  local _obj_0 = require("lpeg")
+  C, Ct, Cmt = _obj_0.C, _obj_0.Ct, _obj_0.Cmt
+end
+```
+
 * Add feature of `reusing variable` which helps generate reduced Lua codes. For example, MoonPlus will generate codes from:
 ```Moonscript
 with leaf
@@ -36,7 +92,7 @@ for x in *something
   print x
 ```
 &emsp;&emsp;to:
-```lua
+```Lua
 leaf.world(1, 2, 3)
 do
   local g = leaf.what.is.this
diff --git a/spec/inputs/assign.moon b/spec/inputs/assign.moon
index 3e66491..4e50147 100644
--- a/spec/inputs/assign.moon
+++ b/spec/inputs/assign.moon
@@ -1,30 +1,30 @@
 
 _ = ->
-  joop = 2302
+	joop = 2302
 
-  (hi) ->
-    d = 100
-    hi = 1021
+	(hi) ->
+		d = 100
+		hi = 1021
 
-    a,b,c,d = 1,2,3,4
+		a,b,c,d = 1,2,3,4
 
-    hello[232], (5+5)[121], hello, x[99] = 100, 200, 300
+		hello[232], (5+5)[121], hello, x[99] = 100, 200, 300
 
-    joop = 12
+		joop = 12
 
 joop = 2345
 
 a, b = if hello
-  "hello"
+	"hello"
 else
-  "nothing", "yeah"
+	"nothing", "yeah"
 
 
 a, b = if hello
-  if yeah then "one", "two" else "mmhh"
+	if yeah then "one", "two" else "mmhh"
 else
-  print "the other"
-  "nothing", "yeah"
+	print "the other"
+	"nothing", "yeah"
 
 
 
diff --git a/spec/inputs/bubbling.moon b/spec/inputs/bubbling.moon
index d1004f9..62d1550 100644
--- a/spec/inputs/bubbling.moon
+++ b/spec/inputs/bubbling.moon
@@ -3,17 +3,17 @@
 f = (...) -> #{...}
 
 dont_bubble = ->
-  [x for x in ((...)-> print ...)("hello")]
+	[x for x in ((...)-> print ...)("hello")]
 
 k = [x for x in ((...)-> print ...)("hello")]
 
 j = for i=1,10
-  (...) -> print ...
+	(...) -> print ...
 
 -- bubble me
 
 m = (...) ->
-  [x for x in *{...} when f(...) > 4]
+	[x for x in *{...} when f(...) > 4]
 
 x = for i in *{...} do i
 y = [x for x in *{...}]
@@ -23,6 +23,6 @@ z = [x for x in hallo when f(...) > 4]
 a = for i=1,10 do ...
 
 b = for i=1,10
-  -> print ...
+	-> print ...
 
 
diff --git a/spec/inputs/class.moon b/spec/inputs/class.moon
index 60361ca..83f3760 100644
--- a/spec/inputs/class.moon
+++ b/spec/inputs/class.moon
@@ -1,10 +1,10 @@
 
 class Hello
-  new: (@test, @world) =>
-    print "creating object.."
-  hello: =>
-    print @test, @world
-  __tostring: => "hello world"
+	new: (@test, @world) =>
+		print "creating object.."
+	hello: =>
+		print @test, @world
+	__tostring: => "hello world"
 
 x = Hello 1,2
 x\hello()
@@ -12,26 +12,26 @@ x\hello()
 print x
 
 class Simple
-  cool: => print "cool"
+	cool: => print "cool"
 
 class Yikes extends Simple
-  new: => print "created hello"
+	new: => print "created hello"
 
 x = Yikes()
 x\cool()
 
 
 class Hi
-  new: (arg) =>
-    print "init arg", arg
+	new: (arg) =>
+		print "init arg", arg
 
-  cool: (num) =>
-    print "num", num
+	cool: (num) =>
+		print "num", num
 
 
 class Simple extends Hi
-  new: => super "man"
-  cool: => super 120302
+	new: => super "man"
+	cool: => super 120302
 
 x = Simple()
 x\cool()
@@ -40,45 +40,45 @@ print x.__class == Simple
 
 
 class Okay
-  -- what is going on
-  something: 20323
-  -- yeaha
+	-- what is going on
+	something: 20323
+	-- yeaha
 
 
 class Biggie extends Okay
-  something: =>
-    super 1,2,3,4
-    super.something another_self, 1,2,3,4
-    assert super == Okay
+	something: =>
+		super 1,2,3,4
+		super.something another_self, 1,2,3,4
+		assert super == Okay
 
 
 class Yeah
-  okay: =>
-    super\something 1,2,3,4
+	okay: =>
+		super\something 1,2,3,4
 
 
 class What
-  something: => print "val:", @val
+	something: => print "val:", @val
 
 class Hello extends What
-  val: 2323
-  something: => super\something
+	val: 2323
+	something: => super\something
 
 with Hello!
-  x = \something!
-  print x
-  x!
+	x = \something!
+	print x
+	x!
 
 class CoolSuper
-  hi: =>
-    super(1,2,3,4) 1,2,3,4
-    super.something 1,2,3,4
-    _ = super.something(1,2,3,4).world
-    super\yeah"world".okay hi, hi, hi
-    _ = something.super
-    _ = super.super.super.super
-    _ = super\hello
-    nil
+	hi: =>
+		super(1,2,3,4) 1,2,3,4
+		super.something 1,2,3,4
+		_ = super.something(1,2,3,4).world
+		super\yeah"world".okay hi, hi, hi
+		_ = something.super
+		_ = super.super.super.super
+		_ = super\hello
+		nil
 
 
 -- selfing
@@ -95,11 +95,11 @@ xx = (@hello, @@world, cool) ->
 
 -- class properties
 class ClassMan
-  @yeah: 343
-  blue: =>
-  @hello: 3434, @world: 23423
-  green: =>
-  @red: =>
+	@yeah: 343
+	blue: =>
+	@hello: 3434, @world: 23423
+	green: =>
+	@red: =>
 
 
 x = @
@@ -118,34 +118,34 @@ _ = hello[@].world
 
 
 class Whacko
-  _ = @hello
-  if something
-    print "hello world"
+	_ = @hello
+	if something
+		print "hello world"
 
-  hello = "world"
-  @another = "day"
+	hello = "world"
+	@another = "day"
 
-  print "yeah" if something -- this is briken
+	print "yeah" if something -- this is briken
 
 
 print "hello"
 
 yyy = ->
-  class Cool
-    _ = nil
+	class Cool
+		_ = nil
 
 
 --
 
 class a.b.c.D
-  _ = nil
+	_ = nil
 
 
 class a.b["hello"]
-  _ = nil
+	_ = nil
 
 class (-> require "moon")!.Something extends Hello.World
-  _ = nil
+	_ = nil
 
 --
 
@@ -160,54 +160,54 @@ print (class WhatsUp).__name
 
 export ^
 class Something
-  _ = nil
+	_ = nil
 
 
 --
 
 -- hoisting
 class Something
-  val = 23
-  {:insert} = table
-  new: => print insert, val -- prints nil 23
+	val = 23
+	{:insert} = table
+	new: => print insert, val -- prints nil 23
 
 --
 
 class X
-  new: hi
+	new: hi
 
 
 --
 
 class Cool extends Thing
-  dang: =>
-    {
-      hello: -> super!
-      world: -> super.one
-    }
+	dang: =>
+		{
+			hello: -> super!
+			world: -> super.one
+		}
 
 -- 
 
 class Whack extends Thing
-  dang: do_something =>
-    super!
+	dang: do_something =>
+		super!
 
 ---
 
 class Wowha extends Thing
-  @butt: ->
-    super!
-    _ = super.hello
-    super\hello!
-    super\hello
-
-
-  @zone: cool {
-    ->
-      super!
-      _ = super.hello
-      super\hello!
-      super\hello
-  }
+	@butt: ->
+		super!
+		_ = super.hello
+		super\hello!
+		super\hello
+
+
+	@zone: cool {
+		->
+			super!
+			_ = super.hello
+			super\hello!
+			super\hello
+	}
 
 nil
diff --git a/spec/inputs/cond.moon b/spec/inputs/cond.moon
index e8b6283..3dee99b 100644
--- a/spec/inputs/cond.moon
+++ b/spec/inputs/cond.moon
@@ -2,24 +2,24 @@
 you_cool = false
 
 _ = if cool
-  if you_cool
-    one
-  else if eatdic
-    yeah
-  else
-    _ = two
-    three
+	if you_cool
+		one
+	else if eatdic
+		yeah
+	else
+		_ = two
+		three
 else
-  no
+	no
 
 _ = if cool then no
 _ = if cool then no else yes
 
 if cool then wow cool else
-  noso cool
+	noso cool
 
 if working
-  _ = if cool then if cool then okay else what else nah
+	_ = if cool then if cool then okay else what else nah
 
 
 if yeah then no day elseif cool me then okay ya else u way
@@ -29,117 +29,117 @@ if yeah then no dad else if cool you then okay bah else p way
 if (->)() then what ever
 
 if nil then flip me else
-  it be,rad
+	it be,rad
 
 
 if things great then no way elseif okay sure
-  what here
+	what here
 
 
 if things then no chance
 elseif okay
-  what now
+	what now
 
 
 if things
-  yes man
+	yes man
 elseif okay person then hi there else hmm sure
 
 if lets go
-  print "greetings"
+	print "greetings"
 elseif "just us"
-  print "will smith" else show 5555555
+	print "will smith" else show 5555555
 
 --
 
 if something = 10
-  print something
+	print something
 else
-  print "else"
+	print "else"
 
 hello = if something = 10
-  print something
+	print something
 else
-  print "else"
+	print "else"
 
 
 hello = 5 + if something = 10
-  print something
+	print something
 
 ---
 
 z = false
 
 _ = if false
-  one
+	one
 elseif x = true
-  two
+	two
 elseif z = true
-  three
+	three
 else
-  four
+	four
 
 
 out = if false
-  one
+	one
 elseif x = true
-  two
+	two
 elseif z = true
-  three
+	three
 else
-  four
+	four
 
 kzy = ->
-  if something = true
-    1
-  elseif another = false
-    2
+	if something = true
+		1
+	elseif another = false
+		2
 
 ---
 
 unless true
-  print "cool!"
+	print "cool!"
 
 unless true and false
-  print "cool!"
+	print "cool!"
 
 unless false then print "cool!"
 unless false then print "cool!" else print "no way!"
 
 unless nil
-  print "hello"
+	print "hello"
 else
-  print "world"
+	print "world"
 
 --
 
 x = unless true
-  print "cool!"
+	print "cool!"
 
 x = unless true and false
-  print "cool!"
+	print "cool!"
 
 y = unless false then print "cool!"
 y = unless false then print "cool!" else print "no way!"
 
 z = unless nil
-  print "hello"
+	print "hello"
 else
-  print "world"
+	print "world"
 
 print unless true
-  print "cool!"
+	print "cool!"
 
 print unless true and false
-  print "cool!"
+	print "cool!"
 
 print unless false then print "cool!"
 print unless false then print "cool!" else print "no way!"
 
 print unless nil
-  print "hello"
+	print "hello"
 else
-  print "world"
+	print "world"
 
 --
 
@@ -151,9 +151,9 @@ dddd = {1,2,3} unless value
 -- 
 
 do
-  j = 100
-  unless j = hi!
-    error "not j!"
+	j = 100
+	unless j = hi!
+		error "not j!"
 
 ----------------
 
@@ -165,8 +165,8 @@ a,c,b = "cool" if something
 ---
 
 j = if 1
-  if 2
-    3
+	if 2
+		3
 else 6
 
 
@@ -174,10 +174,10 @@ m = if 1
 
 
 
-  if 2
+	if 2
 
 
-    3
+		3
 
 
 else 6
diff --git a/spec/inputs/destructure.moon b/spec/inputs/destructure.moon
index 5bc7810..e0f2198 100644
--- a/spec/inputs/destructure.moon
+++ b/spec/inputs/destructure.moon
@@ -1,105 +1,105 @@
 
 do
-  {a, b} = hello
+	{a, b} = hello
 
-  {{a}, b, {c}} = hello
+	{{a}, b, {c}} = hello
 
-  { :hello, :world } = value
+	{ :hello, :world } = value
 
 do
-  { yes: no, thing } = world
+	{ yes: no, thing } = world
 
-  {:a,:b,:c,:d} = yeah
+	{:a,:b,:c,:d} = yeah
 
-  {a} = one, two
-  {b}, c = one
-  {d}, e = one, two
+	{a} = one, two
+	{b}, c = one
+	{d}, e = one, two
 
-  x, {y} = one, two
+	x, {y} = one, two
 
-  xx, yy = 1, 2
-  {yy, xx} = {xx, yy}
+	xx, yy = 1, 2
+	{yy, xx} = {xx, yy}
 
-  {a, :b, c, :d, e, :f, g} = tbl
+	{a, :b, c, :d, e, :f, g} = tbl
 
 --- 
 
 do
-  futurists =
-    sculptor: "Umberto Boccioni"
-    painter:  "Vladimir Burliuk"
-    poet:
-      name:   "F.T. Marinetti"
-      address: {
-        "Via Roma 42R"
-        "Bellagio, Italy 22021"
-      }
-
-  {poet: {:name, address: {street, city}}} = futurists
+	futurists =
+		sculptor: "Umberto Boccioni"
+		painter:	"Vladimir Burliuk"
+		poet:
+			name:	 "F.T. Marinetti"
+			address: {
+				"Via Roma 42R"
+				"Bellagio, Italy 22021"
+			}
+
+	{poet: {:name, address: {street, city}}} = futurists
 
 --
 
 do
-  { @world } = x
-  { a.b, c.y, func!.z } = x
+	{ @world } = x
+	{ a.b, c.y, func!.z } = x
 
-  { world: @world } = x
+	{ world: @world } = x
 
 --
 
 do
-  thing = {{1,2}, {3,4}}
+	thing = {{1,2}, {3,4}}
 
-  for {x,y} in *thing
-    print x,y
+	for {x,y} in *thing
+		print x,y
 
 
 --
 
 do
-  with {a,b} = thing
-    print a, b
+	with {a,b} = thing
+		print a, b
 
 
 --
 
 do
-  thing = nil
-  if {a} = thing
-    print a
-  else
-    print "nothing"
-
-  thang = {1,2}
-  if {a,b} = thang
-    print a,b
-
-  if {a,b} = thing
-    print a,b
-  elseif {c,d} = thang
-    print c,d
-  else
-    print "NO"
+	thing = nil
+	if {a} = thing
+		print a
+	else
+		print "nothing"
+
+	thang = {1,2}
+	if {a,b} = thang
+		print a,b
+
+	if {a,b} = thing
+		print a,b
+	elseif {c,d} = thang
+		print c,d
+	else
+		print "NO"
 
 --
 
 do
-  z = "yeah"
-  {a,b,c} = z
+	z = "yeah"
+	{a,b,c} = z
 
 do
-  {a,b,c} = z
+	{a,b,c} = z
 
 _ = (z) ->
-  {a,b,c} = z
+	{a,b,c} = z
 
 do
-  z = "oo"
-  _ = (k) ->
-    {a,b,c} = z
+	z = "oo"
+	_ = (k) ->
+		{a,b,c} = z
 
 do
-  {function:{end:endVar}} = thing
+	{function:{end:endVar}} = thing
 
 do
-  {if:{a,b,c}} = thing
+	{if:{a,b,c}} = thing
diff --git a/spec/inputs/do.moon b/spec/inputs/do.moon
index 21e2127..2fbcbb9 100644
--- a/spec/inputs/do.moon
+++ b/spec/inputs/do.moon
@@ -1,27 +1,27 @@
 
 do
-  print "hello"
-  print "world"
+	print "hello"
+	print "world"
 
 x = do
-  print "hello"
-  print "world"
+	print "hello"
+	print "world"
 
 y = do
-  things = "shhh"
-  -> "hello: " .. things
+	things = "shhh"
+	-> "hello: " .. things
 
 _ = -> if something then do "yeah"
 
 t = {
-  y: do
-    number = 100
-    (x) -> x + number
+	y: do
+		number = 100
+		(x) -> x + number
 }
 
 (y=(do
-  x = 10 + 2
-  x), k=do
-    "nothing") -> do
-      "uhhh"
+	x = 10 + 2
+	x), k=do
+		"nothing") -> do
+			"uhhh"
 
diff --git a/spec/inputs/existential.moon b/spec/inputs/existential.moon
index f7d5ebd..2264768 100644
--- a/spec/inputs/existential.moon
+++ b/spec/inputs/existential.moon
@@ -1,5 +1,7 @@
 
-f?!
+f1?!
+
+f2? "arg0",123
 
 x = tab?.value
 
@@ -19,3 +21,21 @@ if {:x} = a?.if?\then?(123)? @?\function 998
 
 res = b.function\do!\while?("OK")\if("def",998)\f?
 print res
+
+solipsism = true if mind? and not world?
+
+speed = 0
+speed or= 15
+
+footprints = yeti or "bear"
+
+major = 'Computer Science'
+
+unless major?
+	signUpForClass 'Introduction to Wines'
+
+if window?
+	environment = 'browser (probably)'
+
+zip = lottery.drawWinner?!.address?.zipcode
+
diff --git a/spec/inputs/export.moon b/spec/inputs/export.moon
index 0a56379..a8c782c 100644
--- a/spec/inputs/export.moon
+++ b/spec/inputs/export.moon
@@ -1,77 +1,77 @@
 
 do
-  export a,b,c = 223, 343
-  export cool = "dad"
+	export a,b,c = 223, 343
+	export cool = "dad"
 
 do
-  export class Something
-    umm: "cool"
+	export class Something
+		umm: "cool"
 
 do
-  export a,b,c
-  a,b,c,d = "hello"
+	export a,b,c
+	a,b,c,d = "hello"
 
 
 do
-  What = if this
-    232
-  else
-    4343
+	What = if this
+		232
+	else
+		4343
 
-  export ^
+	export ^
 
-  another = 3434
-  Another = 7890
+	another = 3434
+	Another = 7890
 
-  if inner then Yeah = "10000"
+	if inner then Yeah = "10000"
 
-  What = if this
-    232
-  else
-    4343
+	What = if this
+		232
+	else
+		4343
 
 
 do
-  export *
+	export *
 
-  What = if this
-    232
-  else
-    4343
+	What = if this
+		232
+	else
+		4343
 
-  x,y,z = 1,2,3
+	x,y,z = 1,2,3
 
-  y = ->
-    hallo = 3434
+	y = ->
+		hallo = 3434
 
-  with tmp
-    j = 2000
+	with tmp
+		j = 2000
 
 
 do
-  export *
-  x = 3434
-  if y then
-    x = 10
+	export *
+	x = 3434
+	if y then
+		x = 10
 
 do
-  export *
-  if y then
-    x = 10
-  x = 3434
+	export *
+	if y then
+		x = 10
+	x = 3434
 
 do
-  do
-    export *
+	do
+		export *
 
-    k = 1212
+		k = 1212
 
-    do
-      h = 100
+		do
+			h = 100
 
-    y = ->
-      h = 100
-      k = 100
+		y = ->
+			h = 100
+			k = 100
 
-  h = 100
+	h = 100
 
diff --git a/spec/inputs/funcs.moon b/spec/inputs/funcs.moon
index da42db6..4176e33 100644
--- a/spec/inputs/funcs.moon
+++ b/spec/inputs/funcs.moon
@@ -11,9 +11,9 @@ go to the barn
 open -> the -> door
 
 open ->
-  the door
-  hello = ->
-    my func
+	the door
+	hello = ->
+		my func
 
 h = -> hi
 
@@ -35,7 +35,7 @@ what! the! heck!
 _ = (a,b,c,d,e) ->
 
 _ = (a,a,a,a,a) ->
-  print a
+	print a
 
 _ = (x=23023) ->
 
@@ -44,7 +44,7 @@ _ = (x=(y=()->) ->) ->
 _ = (x = if something then yeah else no) ->
 
 something = (hello=100, world=(x=[[yeah cool]])-> print "eat rice") ->
-  print hello
+	print hello
 
 _ = (x, y) =>
 _ = (@x, @y) =>
@@ -62,99 +62,99 @@ _ = -> real_name if something
 --
 
 d(
-  ->
-    print "hello world"
-  10
+	->
+		print "hello world"
+	10
 )
 
 
 
 d(
-  1,2,3
-  4
-  5
-  6
+	1,2,3
+	4
+	5
+	6
 
-  if something
-    print "okay"
-    10
+	if something
+		print "okay"
+		10
 
-  10,20
+	10,20
 )
 
 
 f(
-  
-  )(
-  
-  )(
-    what
-  )(->
-    print "srue"
-  123)
+	
+	)(
+	
+	)(
+		what
+	)(->
+		print "srue"
+	123)
 
 --
 
 x = (a,
-  b) ->
-   print "what"
+	b) ->
+	 print "what"
 
 
 y = (a="hi",
-  b=23) ->
-    print "what"
+	b=23) ->
+		print "what"
 
 z = (
-  a="hi",
-  b=23) ->
-    print "what"
+	a="hi",
+	b=23) ->
+		print "what"
 
 
 j = (f,g,m,
-  a="hi",
-  b=23
+	a="hi",
+	b=23
 ) ->
-    print "what"
+		print "what"
 
 
 y = (a="hi",
-  b=23,
-  ...) ->
-    print "what"
+	b=23,
+	...) ->
+		print "what"
 
 
 y = (a="hi",
-  b=23,
-  ...
+	b=23,
+	...
 ) ->
-    print "what"
+		print "what"
 
 --
 
 args = (a
-  b) ->
-    print "what"
+	b) ->
+		print "what"
 
 
 args = (a="hi"
-  b=23) ->
-    print "what"
+	b=23) ->
+		print "what"
 
 args = (
-  a="hi"
-  b=23) ->
-    print "what"
+	a="hi"
+	b=23) ->
+		print "what"
 
 
 args = (f,g,m
-  a="hi"
-  b=23
+	a="hi"
+	b=23
 ) ->
-    print "what"
+		print "what"
 
 
 @ = (n)->
-  return 1 if n == 0
-  n * @(n-1)
+	return 1 if n == 0
+	n * @(n-1)
 
 nil
diff --git a/spec/inputs/import.moon b/spec/inputs/import.moon
index ef6f4ee..ded1ffd 100644
--- a/spec/inputs/import.moon
+++ b/spec/inputs/import.moon
@@ -18,50 +18,50 @@ import something from a table
 
 
 if indent
-  import okay, \well from tables[100]
+	import okay, \well from tables[100]
 
 do
-  import a, b, c from z
+	import a, b, c from z
 
 do
-  import a,
-    b, c from z
+	import a,
+		b, c from z
 
 do
-  import a
-    b
-    c from z
+	import a
+		b
+		c from z
 
 do
-  import
-    a
-    b
-    c from z
+	import
+		a
+		b
+		c from z
 
 
 do
-  import
-    a
-    b
-    c
-    from z
+	import
+		a
+		b
+		c
+		from z
 
 
 do
-  import 'module'
-  import 'module_x'
-  import "d-a-s-h-e-s"
-  import "module.part"
+	import 'module'
+	import 'module_x'
+	import "d-a-s-h-e-s"
+	import "module.part"
 
 do
-  import "player" as Player
-  import "lpeg" as {:C, :Ct, :Cmt}
+	import "player" as Player
+	import "lpeg" as {:C, :Ct, :Cmt}
 
 do
-  export *
-  import 'module'
-  import 'module_x'
-  import "org.package.module-y"
+	export *
+	import 'module'
+	import 'module_x'
+	import "org.package.module-y"
 
 do
-  import "org.package.module" as {function:func,if:ifVar}
+	import "org.package.module" as {function:func,if:ifVar}
diff --git a/spec/inputs/lists.moon b/spec/inputs/lists.moon
index ef5650c..15eb9ab 100644
--- a/spec/inputs/lists.moon
+++ b/spec/inputs/lists.moon
@@ -6,7 +6,7 @@ items = {1,2,3,4,5,6}
 _ = [z for z in ipairs items when z > 4]
 
 rad = [{a} for a in ipairs {
-   1,2,3,4,5,6,
+	 1,2,3,4,5,6,
 } when good_number a]
 
 
@@ -17,11 +17,11 @@ require "util"
 dump = (x) -> print util.dump x
 
 range = (count) ->
-  i = 0
-  return coroutine.wrap ->
-    while i < count
-      coroutine.yield i
-      i = i + 1
+	i = 0
+	return coroutine.wrap ->
+		while i < count
+			coroutine.yield i
+			i = i + 1
 
 dump [x for x in range 10]
 dump [{x, y} for x in range 5 when x > 2 for y in range 5]
@@ -61,7 +61,7 @@ print y for y in *x[a,b,c]
 
 
 normal = (hello) ->
-  [x for x in yeah]
+	[x for x in yeah]
 
 
 test = x 1,2,3,4,5
diff --git a/spec/inputs/local.moon b/spec/inputs/local.moon
index f14f575..33251a9 100644
--- a/spec/inputs/local.moon
+++ b/spec/inputs/local.moon
@@ -1,94 +1,94 @@
 
 do
-  local a
-  local a,b,c
+	local a
+	local a,b,c
 
-  b,g = 23232
+	b,g = 23232
 
 
 do
-  x = 1212
-  something = ->
-    local x
-    x = 1212
+	x = 1212
+	something = ->
+		local x
+		x = 1212
 
 do
-  local *
-  y = 2323
-  z = 2323
+	local *
+	y = 2323
+	z = 2323
 
 do
-  local *
-  print "Nothing Here!"
+	local *
+	print "Nothing Here!"
 
 do
-  local ^
-  x = 3434
-  y = 3434
-  X = 3434
-  Y = "yeah"
+	local ^
+	x = 3434
+	y = 3434
+	X = 3434
+	Y = "yeah"
 
 do
-  local ^
-  x,y = "a", "b"
+	local ^
+	x,y = "a", "b"
 
 do
-  local *
-  x,y = "a", "b"
+	local *
+	x,y = "a", "b"
 
 
 do
-  local *
-  if something
-    x = 2323
+	local *
+	if something
+		x = 2323
 
 do
-  local *
-  do
-    x = "one"
+	local *
+	do
+		x = "one"
 
-  x = 100
+	x = 100
 
-  do
-    x = "two"
+	do
+		x = "two"
 
 do
-  local *
-  k = if what
-    10
-  x = 100
+	local *
+	k = if what
+		10
+	x = 100
 
-  {:a,:b, :c} = y
+	{:a,:b, :c} = y
 
 
 do
-  local *
+	local *
 
-  a = 100
-  print "hi"
-  b = 200
+	a = 100
+	print "hi"
+	b = 200
 
-  local *
-  c = 100
-  print "hi"
-  d = 200
-  d = 2323
+	local *
+	c = 100
+	print "hi"
+	d = 200
+	d = 2323
 
 
 do
-  local ^
-  lowercase = 5
-  Uppercase = 3
+	local ^
+	lowercase = 5
+	Uppercase = 3
 
-  class One
-    Five = 6
+	class One
+		Five = 6
 
-  class Two
-    class No
+	class Two
+		class No
 
 do
-  local *
-  -- this generates a nil value in the body
-  for a in *{} do _ = a
+	local *
+	-- this generates a nil value in the body
+	for a in *{} do _ = a
 
 g = 2323 -- test if anything leaked
diff --git a/spec/inputs/loops.moon b/spec/inputs/loops.moon
index 130570e..35427f6 100644
--- a/spec/inputs/loops.moon
+++ b/spec/inputs/loops.moon
@@ -1,133 +1,133 @@
 
 for x=1,10
-  print "yeah"
+	print "yeah"
 
 for x=1,#something
-  print "yeah"
+	print "yeah"
 
 for y=100,60,-3
-  print "count down", y
+	print "count down", y
 
 for a=1,10 do print "okay"
 
 for a=1,10
-  for b = 2,43
-    print a,b
+	for b = 2,43
+		print a,b
 
 for i in iter
-  for j in yeah
-    x = 343 + i + j
-    print i, j
+	for j in yeah
+		x = 343 + i + j
+		print i, j
 
 for x in *something
-  print x
+	print x
 
 for k,v in pairs hello do print k,v
 
 for x in y, z
-  print x
+	print x
 
 for x in y, z, k
-  print x
+	print x
 
 
 x = ->
-  for x in y
-    _ = y
+	for x in y
+		_ = y
 
 hello = {1,2,3,4,5}
 
 x = for y in *hello
-  if y % 2 == 0
-    y
+	if y % 2 == 0
+		y
 
 x = ->
-  for x in *hello
-    _ = y
+	for x in *hello
+		_ = y
 
 t = for i=10,20 do i * 2
 
 hmm = 0
 y = for j = 3,30, 8
-  hmm += 1
-  j * hmm
+	hmm += 1
+	j * hmm
 
 _ = ->
-  for k=10,40
-    _ = "okay"
+	for k=10,40
+		_ = "okay"
 
 _ = ->
-  return for k=10,40
-    "okay"
+	return for k=10,40
+		"okay"
 
 while true do print "name"
 
 while 5 + 5
-  print "okay world"
-  working man
+	print "okay world"
+	working man
 
 while also do
-  i work too
-  _ = "okay"
+	i work too
+	_ = "okay"
 
 i = 0
 x = while i < 10
-  i += 1
+	i += 1
 
 -- values that can'e be coerced
 
 x = for thing in *3
-  y = "hello"
+	y = "hello"
 
 x = for x=1,2
-  y = "hello"
+	y = "hello"
 
 
 -- continue
 
 while true
-  continue if false
-  print "yes"
-  break if true
-  print "no"
+	continue if false
+	print "yes"
+	break if true
+	print "no"
 
 
 for x=1,10
-  continue if x > 3 and x < 7
-  print x
+	continue if x > 3 and x < 7
+	print x
 
 
 list = for x=1,10
-  continue if x > 3 and x < 7
-  x
+	continue if x > 3 and x < 7
+	x
 
 
 for a in *{1,2,3,4,5,6}
-  continue if a == 1
-  continue if a == 3
-  print a
+	continue if a == 1
+	continue if a == 3
+	print a
 
 
 
 for x=1,10
-  continue if x % 2 == 0
-  for y = 2,12
-    continue if y % 3 == 0
+	continue if x % 2 == 0
+	for y = 2,12
+		continue if y % 3 == 0
 
 
 while true
-  continue if false
-  break
+	continue if false
+	break
 
 while true
-  continue if false
-  return 22
+	continue if false
+	return 22
 
 --
 
 do
-  xxx = {1,2,3,4}
-  for thing in *xxx
-    print thing
+	xxx = {1,2,3,4}
+	for thing in *xxx
+		print thing
 
 
diff --git a/spec/inputs/operators.moon b/spec/inputs/operators.moon
index 142ef62..57e58d6 100644
--- a/spec/inputs/operators.moon
+++ b/spec/inputs/operators.moon
@@ -3,70 +3,70 @@
 x = 1 + 3
 
 y = 1 +
-  3
+	3
 
 z = 1 +
-  3 +
-  4
+	3 +
+	4
 
 --
 
 k = b and c and
-  g
+	g
 
 
 h = thing and
-  ->
-    print "hello world"
+	->
+		print "hello world"
 
 -- TODO: should fail, indent still set to previous line so it thinks body is
 -- indented
 i = thing or
-  ->
-  print "hello world"
+	->
+	print "hello world"
 
 p = thing and
-  ->
+	->
 print "hello world"
 
 s = thing or
-  -> and 234
+	-> and 234
 
 
 --
 u = {
-  color: 1 and 2 and
-    3
-    4
-  4
+	color: 1 and 2 and
+		3
+		4
+	4
 }
 
 v = {
-  color: 1 and
-    ->
-      "yeah"
-    "great"
-  oksy: 3 ^
+	color: 1 and
+		->
+			"yeah"
+		"great"
+	oksy: 3 ^
 2
 }
 
 -- parens
 
 nno = (
-  yeah + 2   )
+	yeah + 2	 )
 
 nn = (
-  yeah + 2
+	yeah + 2
 )
 
 n = hello(
-  b
+	b
 ) ->
 
 hello a,
-  (
-    yeah +
-      2
-  ) -
-    okay
+	(
+		yeah +
+			2
+	) -
+		okay
 
diff --git a/spec/inputs/plus.moon b/spec/inputs/plus.moon
index 7b9ef05..8a91c93 100644
--- a/spec/inputs/plus.moon
+++ b/spec/inputs/plus.moon
@@ -7,3 +7,9 @@ c.repeat.if\then("xyz")\else res
 
 print @for,@@function 123
 
+if fcolor = message\match "<%w*>" then message = message\gsub "<%->", fcolor
+
+message = message\gsub "<%->", fcolor if fcolor = message\match "<%w*>"
+
+func val if val = getvalue!
+
diff --git a/spec/inputs/return.moon b/spec/inputs/return.moon
index 98c3104..f170ffd 100644
--- a/spec/inputs/return.moon
+++ b/spec/inputs/return.moon
@@ -6,48 +6,48 @@ _ = -> [x for x in *things]
 
 -- doesn't make sense on purpose
 do
-  return x for x in *things
+	return x for x in *things
 
 do
-  return [x for x in *things]
+	return [x for x in *things]
 
 do
-  return {x,y for x,y in *things}
+	return {x,y for x,y in *things}
 
 _ = ->
-  if a
-    if a
-      a
-    else
-      b
-  elseif b
-    if a
-      a
-    else
-      b
-  else
-    if a
-      a
-    else
-      b
+	if a
+		if a
+			a
+		else
+			b
+	elseif b
+		if a
+			a
+		else
+			b
+	else
+		if a
+			a
+		else
+			b
 
 
 do
-  return if a
-    if a
-      a
-    else
-      b
-  elseif b
-    if a
-      a
-    else
-      b
-  else
-    if a
-      a
-    else
-      b
+	return if a
+		if a
+			a
+		else
+			b
+	elseif b
+		if a
+			a
+		else
+			b
+	else
+		if a
+			a
+		else
+			b
 
 _ = -> a\b
 do a\b
diff --git a/spec/inputs/stub.moon b/spec/inputs/stub.moon
index f8f6c3f..b38056a 100644
--- a/spec/inputs/stub.moon
+++ b/spec/inputs/stub.moon
@@ -1,9 +1,9 @@
 
 
 x = {
-  val: 100
-  hello: =>
-    print @val
+	val: 100
+	hello: =>
+		print @val
 }
 
 fn = x\val
diff --git a/spec/inputs/switch.moon b/spec/inputs/switch.moon
index a028f98..ac3dbea 100644
--- a/spec/inputs/switch.moon
+++ b/spec/inputs/switch.moon
@@ -1,64 +1,64 @@
 
 switch value
-  when "cool"
-    print "hello world"
+	when "cool"
+		print "hello world"
 
 
 switch value
-  when "cool"
-    print "hello world"
-  else
-    print "okay rad"
+	when "cool"
+		print "hello world"
+	else
+		print "okay rad"
 
 
 switch value
-  when "cool"
-    print "hello world"
-  when "yeah"
-    _ = [[FFFF]] + [[MMMM]]
-  when 2323 + 32434
-    print "okay"
-  else
-    print "okay rad"
+	when "cool"
+		print "hello world"
+	when "yeah"
+		_ = [[FFFF]] + [[MMMM]]
+	when 2323 + 32434
+		print "okay"
+	else
+		print "okay rad"
 
 out = switch value
-  when "cool" then print "hello world"
-  else print "okay rad"
+	when "cool" then print "hello world"
+	else print "okay rad"
 
 out = switch value
-  when "cool" then xxxx
-  when "umm" then 34340
-  else error "this failed big time"
+	when "cool" then xxxx
+	when "umm" then 34340
+	else error "this failed big time"
 
 with something
-  switch \value!
-    when .okay
-      _ = "world"
-    else
-      _ = "yesh"
+	switch \value!
+		when .okay
+			_ = "world"
+		else
+			_ = "yesh"
 
 fix this
 call_func switch something
-  when 1 then "yes"
-  else "no"
+	when 1 then "yes"
+	else "no"
 
 --
 
 switch hi
-  when hello or world
-    _ = greene
+	when hello or world
+		_ = greene
 
 --
 
 switch hi
-  when "one", "two"
-    print "cool"
-  when "dad"
-    _ = no
+	when "one", "two"
+		print "cool"
+	when "dad"
+		_ = no
 
 switch hi
-  when 3+1, hello!, (-> 4)!
-    yello
-  else
-    print "cool"
+	when 3+1, hello!, (-> 4)!
+		yello
+	else
+		print "cool"
 
diff --git a/spec/inputs/syntax.moon b/spec/inputs/syntax.moon
index 351b22c..bf0cf04 100644
--- a/spec/inputs/syntax.moon
+++ b/spec/inputs/syntax.moon
@@ -29,7 +29,7 @@ hairy[hands][are](gross) okay okay[world]
 
 _ = (get[something] + 5)[years]
 
-i,x  = 200, 300
+i,x	= 200, 300
 
 yeah = (1 + 5) * 3
 yeah = ((1+5)*3)/2
@@ -38,16 +38,16 @@ yeah = ((1+5)*3)/2 + i % 100
 whoa = (1+2) * (3+4) * (4+5)
 
 _ = ->
-  if something
-    return 1,2,4
+	if something
+		return 1,2,4
 
-  print "hello"
+	print "hello"
 
 _ = ->
-  if hello
-    "heloo", "world"
-  else
-    no, way
+	if hello
+		"heloo", "world"
+	else
+		no, way
 
 
 _ = -> 1,2,34
@@ -82,23 +82,23 @@ _ = here(we)"go"[12123]
 
 -- this runs
 something =
-  test: 12323
-  what: -> print "hello world"
+	test: 12323
+	what: -> print "hello world"
 
 print something.test
 
 frick = hello: "world"
 
 argon =
-  num: 100
-  world: (self) ->
-    print self.num
-    return {
-      something: -> print "hi from something"
-    }
-  somethin: (self, str) ->
-    print "string is", str
-    return world: (a,b) -> print "sum", a + b
+	num: 100
+	world: (self) ->
+		print self.num
+		return {
+			something: -> print "hi from something"
+		}
+	somethin: (self, str) ->
+		print "string is", str
+		return world: (a,b) -> print "sum", a + b
 
 something.what()
 argon\world().something()
@@ -127,7 +127,7 @@ print "what" if cool else whack!
 arg = {...}
 
 x = (...) ->
-  dump {...}
+	dump {...}
 
 
 x = not true
@@ -167,11 +167,11 @@ _ = (if ntype(v) == "fndef" then x += 1) for v in *values
 
 
 hello =
-  something: world
-  if: "hello"
-  else: 3434
-  function: "okay"
-  good: 230203
+	something: world
+	if: "hello"
+	else: 3434
+	function: "okay"
+	good: 230203
 
 
 div class: "cool"
@@ -185,29 +185,29 @@ what whack - 5
 x = hello - world - something
 
 ((something = with what
-  \cool 100) ->
-  print something)!
+	\cool 100) ->
+	print something)!
 
 if something
-  _ = 03589
+	_ = 03589
 
 -- okay what about this
 
 else
-  _ = 3434
+	_ = 3434
 
 
 if something
-  _ = yeah
+	_ = yeah
 
 
 elseif "ymmm"
 
-  print "cool"
+	print "cool"
 
 else
 
-  _ = okay
+	_ = okay
 
 
 -- test names containing keywords
@@ -220,15 +220,15 @@ z = x andb
 -- undelimited tables
 
 while 10 > something
-  something: "world"
-    print "yeah"
+	something: "world"
+		print "yeah"
 
 x =
-  okay: sure
+	okay: sure
 
 yeah
-  okay: man
-  sure: sir
+	okay: man
+	sure: sir
 
 hello "no comma"
  yeah: dada
@@ -240,8 +240,8 @@ hello "comma",
 
 -- creates two tables
 another hello, one,
-  two, three, four, yeah: man
-  okay: yeah
+	two, three, four, yeah: man
+	okay: yeah
 
 -- 
 a += 3 - 5
diff --git a/spec/inputs/tables.moon b/spec/inputs/tables.moon
index 10bccde..d7596f5 100644
--- a/spec/inputs/tables.moon
+++ b/spec/inputs/tables.moon
@@ -1,33 +1,33 @@
 
 backpack =
-  something:
-    yeah: 200
-    they: ->
-      print "hello"
-      yor_feet"small"
-    pretty: hair
-    gold: hmm
-  yow: 1000
+	something:
+		yeah: 200
+		they: ->
+			print "hello"
+			yor_feet"small"
+		pretty: hair
+		gold: hmm
+	yow: 1000
 
-  eat: goo
-  yeah: dudd
+	eat: goo
+	yeah: dudd
 
 
 start =
-  something: "cold"
+	something: "cold"
 
 bathe =
-  on: "fire"
+	on: "fire"
 
 another =
-  [4]: 232
-  ["good food"]: "is the best"
+	[4]: 232
+	["good food"]: "is the best"
 
 fwip =
-  something: hello"what", number: 2323,
-  what: yo "momma", "yeah",
-  fruit: basket
-  nuts: day
+	something: hello"what", number: 2323,
+	what: yo "momma", "yeah",
+	fruit: basket
+	nuts: day
 
 
 frick = hello: "world"
@@ -38,106 +38,106 @@ ya = { 1,2,3, key: 100, 343, "hello", umm: 232 }
 
 
 x = { 1,2,
-  4343, 343 ,343 }
+	4343, 343 ,343 }
 
 
 g, p = {
-  1,2, nowy: "yes", 3,4,
-  hey: 232, another: "day"
+	1,2, nowy: "yes", 3,4,
+	hey: 232, another: "day"
 }, 234
 
 annother = {
-  1,2,3
-  3,4,5
-  6,7,8
+	1,2,3
+	3,4,5
+	6,7,8
 }
 
 yeah = {
-  [232]: 3434, "helo"
-  ice: "cake"
+	[232]: 3434, "helo"
+	ice: "cake"
 }
 
 -- confusing stuff...
 whatabout = {
-  hello world, another
-  what, about, now
+	hello world, another
+	what, about, now
 
-  hello"world", yeah
-  hello "world", yeah
+	hello"world", yeah
+	hello "world", yeah
 }
 
 x =
-  -- yeah
-  something: => "hello"
-  cool: -- umm
-    --so ething
-    bed: {
-      2323,2323
-    }
-    red: 2343 -- here
-  -- what
-  name: (node) => @value node -- here
-  -- comment me
+	-- yeah
+	something: => "hello"
+	cool: -- umm
+		--so ething
+		bed: {
+			2323,2323
+		}
+		red: 2343 -- here
+	-- what
+	name: (node) => @value node -- here
+	-- comment me
 -- okay
 
 
 x = { :something, something: something }
 
 y = {
-  :hi, :there, :how, :you
-  :thing
+	:hi, :there, :how, :you
+	:thing
 }
 
 call_me "hello", :x, :y, :z
 
 t = {
-  a: 'a'
-  [b]: 'b'
+	a: 'a'
+	[b]: 'b'
 }
 
 xam = {
-  hello: 1234
-  "hello": 12354
-  ["hello"]: 12354
+	hello: 1234
+	"hello": 12354
+	["hello"]: 12354
 }
 
 
 kam = {
-  hello: 12
-  goodcheese:
-    "mmm"
+	hello: 12
+	goodcheese:
+		"mmm"
 
-  yeah:
-    12 + 232
+	yeah:
+		12 + 232
 
-  lets:
-    keepit going: true,
-      okay: "yeah"
+	lets:
+		keepit going: true,
+			okay: "yeah"
 
-  more:
-    {
-      1, [x for x=1,10]
-    }
+	more:
+		{
+			1, [x for x=1,10]
+		}
 
-  [{"one", "two"}]:
-    one_thing =>
+	[{"one", "two"}]:
+		one_thing =>
 }
 
 -- TODO: both of these have undesirable output
 keepit going: true,
-  okay: "yeah",
-  workd: "okay"
+	okay: "yeah",
+	workd: "okay"
 
 thing what:
-  "great", no:
-    "more"
-          okay: 123
+	"great", no:
+		"more"
+					okay: 123
 
 
 -- 
 thing what:
-  "great", no:
-    "more"
+	"great", no:
+		"more"
 _ = okay: 123 -- a anon table
 
 
diff --git a/spec/inputs/unless_else.moon b/spec/inputs/unless_else.moon
index fe96c0b..b421d4d 100644
--- a/spec/inputs/unless_else.moon
+++ b/spec/inputs/unless_else.moon
@@ -1,5 +1,5 @@
 if a
-  unless b
-    print "hi"
-  elseif c
-    print "not hi"
+	unless b
+		print "hi"
+	elseif c
+		print "not hi"
diff --git a/spec/inputs/using.moon b/spec/inputs/using.moon
index cd78ba6..fe0a433 100644
--- a/spec/inputs/using.moon
+++ b/spec/inputs/using.moon
@@ -3,20 +3,20 @@ hello = "hello"
 world = "world"
 
 _ = (using nil) ->
-  hello = 3223
+	hello = 3223
 
 _ = (a using nil) ->
-  hello = 3223
-  a = 323
+	hello = 3223
+	a = 323
 
 _ = (a,b,c using a,b,c) ->
-  a,b,c = 1,2,3
-  world = 12321
+	a,b,c = 1,2,3
+	world = 12321
 
 (a,e,f using a,b,c, hello) ->
-  a,b,c = 1,2,3
-  hello = 12321
-  world = "yeah"
+	a,b,c = 1,2,3
+	hello = 12321
+	world = "yeah"
 
 
 
diff --git a/spec/inputs/whitespace.moon b/spec/inputs/whitespace.moon
index e505b1b..36f14ae 100644
--- a/spec/inputs/whitespace.moon
+++ b/spec/inputs/whitespace.moon
@@ -1,6 +1,6 @@
 
 _ = {
-  1, 2
+	1, 2
 }
 
 _ = { 1, 2
@@ -16,22 +16,22 @@ _ = {
 }
 
 _ = { something 1,2,
-    4,5,6,
-  3,4,5
+		4,5,6,
+	3,4,5
 }
 
 _ = {
-  a 1,2,3,
-  4,5,6
-  1,2,3
+	a 1,2,3,
+	4,5,6
+	1,2,3
 }
 
 
 _ = {
-  b 1,2,3,
-    4,5,6
-  1,2,3,
-    1,2,3
+	b 1,2,3,
+		4,5,6
+	1,2,3,
+		1,2,3
 }
 
 _ = { 1,2,3 }
@@ -41,61 +41,61 @@ _ = { c 1,2,3,
 
 
 hello 1,2,3,4,
-  1,2,3,4,4,5
+	1,2,3,4,4,5
 
 x 1,
-  2, 3,
-  4, 5, 6
+	2, 3,
+	4, 5, 6
 
 
 hello 1,2,3,
-  world 4,5,6,
-    5,6,7,8
+	world 4,5,6,
+		5,6,7,8
 
 hello 1,2,3,
-  world 4,5,6,
-    5,6,7,8,
-  9,9
+	world 4,5,6,
+		5,6,7,8,
+	9,9
 
 
 _ = {
-  hello 1,2,
-  3,4,
-  5, 6
+	hello 1,2,
+	3,4,
+	5, 6
 }
 
 x = {
-  hello 1,2,3,4,
-    5,6,7
-  1,2,3,4
+	hello 1,2,3,4,
+		5,6,7
+	1,2,3,4
 }
 
 if hello 1,2,3,
-  world,
-  world
-    print "hello"
+	world,
+	world
+		print "hello"
 
 if hello 1,2,3,
-    world,
-    world
-  print "hello"
+		world,
+		world
+	print "hello"
 
 
 --
 
 a(
-  one, two, three
+	one, two, three
 )
 
 b(
-  one,
-  two,
-  three
+	one,
+	two,
+	three
 )
 
 
 c(one, two,
-  three, four)
+	three, four)
 
 -- 
 
diff --git a/spec/inputs/with.moon b/spec/inputs/with.moon
index f543356..704c494 100644
--- a/spec/inputs/with.moon
+++ b/spec/inputs/with.moon
@@ -1,118 +1,118 @@
 
 do
-  a = ->
-    with something
-      print .hello
-      print hi
-      print "world"
+	a = ->
+		with something
+			print .hello
+			print hi
+			print "world"
 
 do
-  with leaf
-    .world!
-    .world 1,2,3
+	with leaf
+		.world!
+		.world 1,2,3
 
-    g = .what.is.this
+		g = .what.is.this
 
-    .hi 1,2,3
+		.hi 1,2,3
 
-    \hi(1,2).world 2323
+		\hi(1,2).world 2323
 
-    \hi "yeah", "man"
-    .world = 200
+		\hi "yeah", "man"
+		.world = 200
 
 do
-  zyzyzy = with something
-    .set_state "hello world"
+	zyzyzy = with something
+		.set_state "hello world"
 
 do
-  x = 5 + with Something!
-    \write "hello world"
+	x = 5 + with Something!
+		\write "hello world"
 
 
 do
-  x = {
-    hello: with yeah
-      \okay!
-  }
+	x = {
+		hello: with yeah
+			\okay!
+	}
 
 do
-  with foo
-    _ = \prop"something".hello
-    .prop\send(one)
-    .prop\send one
+	with foo
+		_ = \prop"something".hello
+		.prop\send(one)
+		.prop\send one
 
 
 --
 
 do
-  with a, b -- b is lost
-    print .world
+	with a, b -- b is lost
+		print .world
 
-  mod = with _M = {}
-    .Thing = "hi"
+	mod = with _M = {}
+		.Thing = "hi"
 
-  -- operate on a only
-  with a, b = something, pooh
-    print .world
+	-- operate on a only
+	with a, b = something, pooh
+		print .world
 
-  x = with a, b = 1, 2
-    print a + b
+	x = with a, b = 1, 2
+		print a + b
 
-  print with a, b = 1, 2
-    print a + b
+	print with a, b = 1, 2
+		print a + b
 
-  -- assignment lhs must be evaluated in the order they appear
-  p = with hello!.x, world!.y = 1, 2
-    print a + b
+	-- assignment lhs must be evaluated in the order they appear
+	p = with hello!.x, world!.y = 1, 2
+		print a + b
 
 --
 
 do
-  x = "hello"
-  with x
-    x\upper!
+	x = "hello"
+	with x
+		x\upper!
 
 do
-  with k = "jo"
-    print \upper!
+	with k = "jo"
+		print \upper!
 
 do
-  with a,b,c = "", "", ""
-    print \upper!
+	with a,b,c = "", "", ""
+		print \upper!
 
 do
-  a = "bunk"
-  with a,b,c = "", "", ""
-    print \upper!
+	a = "bunk"
+	with a,b,c = "", "", ""
+		print \upper!
 
 do
-  with j
-    print \upper!
+	with j
+		print \upper!
 
 do
-  with k.j = "jo"
-    print \upper!
+	with k.j = "jo"
+		print \upper!
 
 do
-  with a
-    print .b
-    -- nested `with`s should change the scope correctly
-    with .c
-      print .d
+	with a
+		print .b
+		-- nested `with`s should change the scope correctly
+		with .c
+			print .d
 
 do
-  with a
-    -- nested `with`s with assignments should change the scope correctly
-    with .b = 2
-      print .c
+	with a
+		-- nested `with`s with assignments should change the scope correctly
+		with .b = 2
+			print .c
 
 do
-  _ = ->
-    with hi
-      return .a, .b
+	_ = ->
+		with hi
+			return .a, .b
 
 
 do
-  with dad
-    .if "yes"
-    y = .end.of.function
+	with dad
+		.if "yes"
+		y = .end.of.function
diff --git a/src/MoonP/moon_ast.h b/src/MoonP/moon_ast.h
index f8d2099..e71afe9 100644
--- a/src/MoonP/moon_ast.h
+++ b/src/MoonP/moon_ast.h
@@ -565,8 +565,9 @@ AST_END(ExpListAssign)
 
 AST_NODE(if_else_line, "if_else_line"_id)
 	ast_ptr<true, Exp_t> condition;
+	ast_ptr<false, Assign_t> assign;
 	ast_sel<false, Exp_t, default_value_t> elseExpr;
-	AST_MEMBER(if_else_line, &condition, &elseExpr)
+	AST_MEMBER(if_else_line, &condition, &assign, &elseExpr)
 AST_END(if_else_line)
 
 AST_NODE(unless_line, "unless_line"_id)
diff --git a/src/MoonP/moon_compiler.cpp b/src/MoonP/moon_compiler.cpp
index b1770fb..4723af4 100644
--- a/src/MoonP/moon_compiler.cpp
+++ b/src/MoonP/moon_compiler.cpp
@@ -601,6 +601,7 @@ private:
 
 					auto ifCond = x->new_ptr<IfCond_t>();
 					ifCond->condition.set(if_else_line->condition);
+					ifCond->assign.set(if_else_line->assign);
 					ifNode->nodes.push_back(ifCond);
 
 					auto stmt = x->new_ptr<Statement_t>();
diff --git a/src/MoonP/moon_parser.cpp b/src/MoonP/moon_parser.cpp
index d3c0ed2..6d1b86c 100644
--- a/src/MoonP/moon_parser.cpp
+++ b/src/MoonP/moon_parser.cpp
@@ -198,7 +198,7 @@ rule IfCond = Exp >> -Assign;
 rule IfElseIf = -(Break >> *EmptyLine >> CheckIndent) >> key("elseif") >> IfCond >> -key("then") >> Body;
 rule IfElse = -(Break >> *EmptyLine >> CheckIndent) >> key("else") >> Body;
 rule If = key("if") >> Seperator >> IfCond >> -key("then") >> Body >> *IfElseIf >> -IfElse;
-rule Unless = key("unless") >> Seperator >>  IfCond >> -key("then") >> Body >> *IfElseIf >> -IfElse;
+rule Unless = key("unless") >> Seperator >> IfCond >> -key("then") >> Body >> *IfElseIf >> -IfElse;
 
 rule While = key("while") >> DisableDo >> ensure(Exp, PopDo) >> -key("do") >> Body;
 
@@ -510,7 +510,7 @@ rule SimpleValue =
 
 rule ExpListAssign = ExpList >> -(Update | Assign);
 
-rule if_else_line = key("if") >> Exp >> (key("else") >> Exp | default_value);
+rule if_else_line = key("if") >> Exp >> -Assign >> (key("else") >> Exp | default_value);
 rule unless_line = key("unless") >> Exp;
 
 rule statement_appendix = (if_else_line | unless_line | CompInner) >> Space;
-- 
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