fix Moonscript issue 122, add support for ? operator.

20 files changed, 145 insertions, 137 deletions

diff --git a/spec/inputs/assign.moon b/spec/inputs/assign.moon
index 1e5e7a6..3e66491 100644
--- a/spec/inputs/assign.moon
+++ b/spec/inputs/assign.moon
@@ -1,5 +1,5 @@
 
-->
+_ = ->
   joop = 2302
 
   (hi) ->
diff --git a/spec/inputs/class.moon b/spec/inputs/class.moon
index 9a98055..2290bc7 100644
--- a/spec/inputs/class.moon
+++ b/spec/inputs/class.moon
@@ -73,11 +73,11 @@ 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.something(1,2,3,4).world
     super\yeah"world".okay hi, hi, hi
-    something.super
-    super.super.super.super
-    super\hello
+    _ = something.super
+    _ = super.super.super.super
+    _ = super\hello
     nil
 
 
@@ -114,11 +114,11 @@ y = @@
 @ = 343
 @.hello 2,3,4
 
-hello[@].world
+_ = hello[@].world
 
 
 class Whacko
-  @hello
+  _ = @hello
   if something
     print "hello world"
 
@@ -132,20 +132,20 @@ print "hello"
 
 yyy = ->
   class Cool
-    nil
+    _ = nil
 
 
 --
 
 class a.b.c.D
-  nil
+  _ = nil
 
 
 class a.b["hello"]
-  nil
+  _ = nil
 
 class (-> require "moon")!.Something extends Hello.World
-  nil
+  _ = nil
 
 --
 
@@ -160,7 +160,7 @@ print (class WhatsUp).__name
 
 export ^
 class Something
-  nil
+  _ = nil
 
 
 --
@@ -197,17 +197,17 @@ class Whack extends Thing
 class Wowha extends Thing
   @butt: ->
     super!
-    super.hello
+    _ = super.hello
     super\hello!
-    super\hello
+    _ = super\hello
 
 
   @zone: cool {
     ->
       super!
-      super.hello
+      _ = super.hello
       super\hello!
-      super\hello
+      _ = super\hello
   }
 
 nil
diff --git a/spec/inputs/comprehension.moon b/spec/inputs/comprehension.moon
index 1609d79..f07cf89 100644
--- a/spec/inputs/comprehension.moon
+++ b/spec/inputs/comprehension.moon
@@ -11,11 +11,11 @@ copy  = {k,v for k,v in pairs x when k != "okay"}
 
 --
 
-{ unpack(x) for x in yes }
-{ unpack(x) for x in *yes }
+_ = { unpack(x) for x in yes }
+_ = { unpack(x) for x in *yes }
 
-{ xxxx for x in yes }
-{ unpack [a*i for i, a in ipairs x] for x in *{{1,2}, {3,4}} }
+_ = { xxxx for x in yes }
+_ = { unpack [a*i for i, a in ipairs x] for x in *{{1,2}, {3,4}} }
 
 
 --
@@ -28,7 +28,7 @@ bb = [y for thing in y for i=1,10]
 cc = [y for i=1,10 for thing in y]
 dd = [y for i=1,10 when cool for thing in y when x > 3 when c + 3]
 
-{"hello", "world" for i=1,10}
+_ = {"hello", "world" for i=1,10}
 
 --
 
@@ -44,8 +44,8 @@ ok(a,b,c) for {a,b,c} in things
 
 --
 
-[item for item in *items[1 + 2,3+4]]
-[item for item in *items[hello! * 4, 2 - thing[4]]]
+_ = [item for item in *items[1 + 2,3+4]]
+_ = [item for item in *items[hello! * 4, 2 - thing[4]]]
 
 
 
diff --git a/spec/inputs/cond.moon b/spec/inputs/cond.moon
index 18e42b9..e8b6283 100644
--- a/spec/inputs/cond.moon
+++ b/spec/inputs/cond.moon
@@ -1,25 +1,25 @@
 
 you_cool = false
 
-if cool
+_ = if cool
   if you_cool
     one
   else if eatdic
     yeah
   else
-    two
+    _ = two
     three
 else
   no
 
-if cool then no
-if cool then no else yes
+_ = if cool then no
+_ = if cool then no else yes
 
 if cool then wow cool else
   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
@@ -70,7 +70,7 @@ hello = 5 + if something = 10
 
 z = false
 
-if false
+_ = if false
   one
 elseif x = true
   two
diff --git a/spec/inputs/destructure.moon b/spec/inputs/destructure.moon
index beb79d6..2509968 100644
--- a/spec/inputs/destructure.moon
+++ b/spec/inputs/destructure.moon
@@ -90,7 +90,7 @@ do
 do
   {a,b,c} = z
 
-(z) ->
+_ = (z) ->
   {a,b,c} = z
 
 do
diff --git a/spec/inputs/do.moon b/spec/inputs/do.moon
index 334e68f..21e2127 100644
--- a/spec/inputs/do.moon
+++ b/spec/inputs/do.moon
@@ -11,7 +11,7 @@ y = do
   things = "shhh"
   -> "hello: " .. things
 
--> if something then do "yeah"
+_ = -> if something then do "yeah"
 
 t = {
   y: do
diff --git a/spec/inputs/existential.moon b/spec/inputs/existential.moon
new file mode 100644
index 0000000..97e8de0
--- /dev/null
+++ b/spec/inputs/existential.moon
@@ -0,0 +1,8 @@
+if {:x} = a?.if?\then?(123)? @?\function 998
+        print x
+
+with abc?!\func?!
+        if \p? "abc"
+                return 123
+
+@?\func 998
diff --git a/spec/inputs/funcs.moon b/spec/inputs/funcs.moon
index 08a29b6..7a4d5d6 100644
--- a/spec/inputs/funcs.moon
+++ b/spec/inputs/funcs.moon
@@ -2,9 +2,9 @@
 
 x = -> print what
 
-->
+_ = ->
 
--> -> ->
+_ = -> -> ->
 
 go to the barn
 
@@ -27,29 +27,29 @@ x = (...) ->
 hello!
 hello.world!
 
-hello!.something
-what!["ofefe"]
+_ = hello!.something
+_ = what!["ofefe"]
 
 what! the! heck!
 
-(a,b,c,d,e) ->
+_ = (a,b,c,d,e) ->
 
-(a,a,a,a,a) ->
+_ = (a,a,a,a,a) ->
   print a
 
-(x=23023) ->
+_ = (x=23023) ->
 
-(x=(y=()->) ->) ->
+_ = (x=(y=()->) ->) ->
 
-(x = if something then yeah else no) ->
+_ = (x = if something then yeah else no) ->
 
 something = (hello=100, world=(x=[[yeah cool]])-> print "eat rice") ->
   print hello
 
-(x, y) =>
-(@x, @y) =>
-(x=1) =>
-(@x=1,y,@z="hello world") =>
+_ = (x, y) =>
+_ = (@x, @y) =>
+_ = (x=1) =>
+_ = (@x=1,y,@z="hello world") =>
 
 
 x -> return
@@ -57,7 +57,7 @@ y -> return 1
 z -> return 1, "hello", "world"
 k -> if yes then return else return
 
--> real_name if something
+_ = -> real_name if something
 
 --
 
@@ -97,7 +97,7 @@ f(
 
 x = (a,
   b) ->
-    print "what"
+   print "what"
 
 
 y = (a="hi",
diff --git a/spec/inputs/lists.moon b/spec/inputs/lists.moon
index c119185..e377d5e 100644
--- a/spec/inputs/lists.moon
+++ b/spec/inputs/lists.moon
@@ -3,14 +3,14 @@ hi = [x*2 for _, x in ipairs{1,2,3,4}]
 
 items = {1,2,3,4,5,6}
 
-[z for z in ipairs items when z > 4]
+_ = [z for z in ipairs items when z > 4]
 
 rad = [{a} for a in ipairs {
    1,2,3,4,5,6,
 } when good_number a]
 
 
-[z for z in items for j in list when z > 4]
+_ = [z for z in items for j in list when z > 4]
 
 require "util"
 
@@ -32,7 +32,7 @@ print x,y for x in ipairs{1,2,4} for y in ipairs{1,2,3} when x != 2
 
 print "hello", x for x in items
 
-[x for x in x]
+_ = [x for x in x]
 x = [x for x in x]
 
 print x,y for x in ipairs{1,2,4} for y in ipairs{1,2,3} when x != 2
@@ -67,6 +67,6 @@ normal = (hello) ->
 test = x 1,2,3,4,5
 print thing for thing in *test
 
--> a = b for row in *rows
+_ = -> a = b for row in *rows
 
 
diff --git a/spec/inputs/literals.moon b/spec/inputs/literals.moon
index c3a24a6..d4b0326 100644
--- a/spec/inputs/literals.moon
+++ b/spec/inputs/literals.moon
@@ -1,46 +1,46 @@
 
+_ = {
+        121
+        121.2323
+        121.2323e-1
+        121.2323e13434
+        2323E34
+        0x12323
 
-121
-121.2323
-121.2323e-1
-121.2323e13434
-2323E34
-0x12323
+        0xfF2323
+        0xabcdef
+        0xABCDEF
 
-0xfF2323
-0xabcdef
-0xABCDEF
+        .2323
+        .2323e-1
+        .2323e13434
 
-.2323
-.2323e-1
-.2323e13434
 
+        1LL
+        1ULL
+        9332LL
+        9332
+        0x2aLL
+        0x2aULL
 
-1LL
-1ULL
-9332LL
-9332
-0x2aLL
-0x2aULL
+        [[ hello world ]]
 
-[[ hello world ]]
+        [=[ hello world ]=]
+        [====[ hello world ]====]
 
-[=[ hello world ]=]
-[====[ hello world ]====]
+        "another world"
 
-"another world"
+        'what world'
 
-'what world'
 
+        "
+        hello world
+        "
 
-"
-hello world
-"
-
-'yeah
-what is going on
-here is something cool'
-
+        'yeah
+        what is going on
+        here is something cool'
 
+}
 nil
 
diff --git a/spec/inputs/local.moon b/spec/inputs/local.moon
index fec78b1..f14f575 100644
--- a/spec/inputs/local.moon
+++ b/spec/inputs/local.moon
@@ -89,6 +89,6 @@ do
 do
   local *
   -- this generates a nil value in the body
-  for a in *{} do a
+  for a in *{} do _ = a
 
 g = 2323 -- test if anything leaked
diff --git a/spec/inputs/loops.moon b/spec/inputs/loops.moon
index a704e56..130570e 100644
--- a/spec/inputs/loops.moon
+++ b/spec/inputs/loops.moon
@@ -33,7 +33,7 @@ for x in y, z, k
 
 x = ->
   for x in y
-    y
+    _ = y
 
 hello = {1,2,3,4,5}
 
@@ -43,7 +43,7 @@ x = for y in *hello
 
 x = ->
   for x in *hello
-    y
+    _ = y
 
 t = for i=10,20 do i * 2
 
@@ -52,11 +52,11 @@ y = for j = 3,30, 8
   hmm += 1
   j * hmm
 
-->
+_ = ->
   for k=10,40
-    "okay"
+    _ = "okay"
 
-->
+_ = ->
   return for k=10,40
     "okay"
 
@@ -68,7 +68,7 @@ while 5 + 5
 
 while also do
   i work too
-  "okay"
+  _ = "okay"
 
 i = 0
 x = while i < 10
diff --git a/spec/inputs/return.moon b/spec/inputs/return.moon
index 61d3dca..98c3104 100644
--- a/spec/inputs/return.moon
+++ b/spec/inputs/return.moon
@@ -1,7 +1,7 @@
 -- testing `return` propagation
 
--> x for x in *things
--> [x for x in *things]
+_ = -> _ = x for x in *things
+_ = -> [x for x in *things]
 
 
 -- doesn't make sense on purpose
@@ -14,7 +14,7 @@ do
 do
   return {x,y for x,y in *things}
 
-->
+_ = ->
   if a
     if a
       a
@@ -49,7 +49,7 @@ do
     else
       b
 
--> a\b
+_ = -> a\b
 do a\b
 
 
diff --git a/spec/inputs/string.moon b/spec/inputs/string.moon
index 897056a..5d8f772 100644
--- a/spec/inputs/string.moon
+++ b/spec/inputs/string.moon
@@ -52,7 +52,7 @@ c = 'hello #{hello}'
 
 --
 
-"hello"
+_ = "hello"
 "hello"\format 1
 "hello"\format(1,2,3)
 "hello"\format(1,2,3) 1,2,3
diff --git a/spec/inputs/switch.moon b/spec/inputs/switch.moon
index 3bc179b..a028f98 100644
--- a/spec/inputs/switch.moon
+++ b/spec/inputs/switch.moon
@@ -15,7 +15,7 @@ switch value
   when "cool"
     print "hello world"
   when "yeah"
-    [[FFFF]] + [[MMMM]]
+    _ = [[FFFF]] + [[MMMM]]
   when 2323 + 32434
     print "okay"
   else
@@ -33,9 +33,9 @@ out = switch value
 with something
   switch \value!
     when .okay
-      "world"
+      _ = "world"
     else
-      "yesh"
+      _ = "yesh"
 
 fix this
 call_func switch something
@@ -46,7 +46,7 @@ call_func switch something
 
 switch hi
   when hello or world
-    greene
+    _ = greene
 
 --
 
@@ -54,7 +54,7 @@ switch hi
   when "one", "two"
     print "cool"
   when "dad"
-    no
+    _ = no
 
 switch hi
   when 3+1, hello!, (-> 4)!
diff --git a/spec/inputs/syntax.moon b/spec/inputs/syntax.moon
index 854f629..351b22c 100644
--- a/spec/inputs/syntax.moon
+++ b/spec/inputs/syntax.moon
@@ -27,7 +27,7 @@ what(the)[3243] world, yeck heck
 
 hairy[hands][are](gross) okay okay[world]
 
-(get[something] + 5)[years]
+_ = (get[something] + 5)[years]
 
 i,x  = 200, 300
 
@@ -37,27 +37,27 @@ yeah = ((1+5)*3)/2 + i % 100
 
 whoa = (1+2) * (3+4) * (4+5)
 
-->
+_ = ->
   if something
     return 1,2,4
 
   print "hello"
 
-->
+_ = ->
   if hello
     "heloo", "world"
   else
     no, way
 
 
--> 1,2,34
+_ = -> 1,2,34
 
 return 5 + () -> 4 + 2
 
 return 5 + (() -> 4) + 2
 
 print 5 + () ->
-        34
+        _ = 34
         good nads
 
 
@@ -66,19 +66,19 @@ something 'else', "ya"
 something'else'
 something"else"
 
-something[[hey]] * 2
-something[======[hey]======] * 2
+_ = something[[hey]] * 2
+_ = something[======[hey]======] * 2
 
 
-something'else', 2
-something"else", 2
-something[[else]], 2
+_ = something'else', 2
+_ = something"else", 2
+_ = something[[else]], 2
 
 something 'else', 2
 something "else", 2
 something [[else]], 2
 
-here(we)"go"[12123]
+_ = here(we)"go"[12123]
 
 -- this runs
 something =
@@ -120,9 +120,9 @@ print "hello" for i=1,10
 
 print "nutjob"
 
-if hello then 343
+if hello then _ = 343
 
-print "what" if cool else whack
+print "what" if cool else whack!
 
 arg = {...}
 
@@ -139,7 +139,7 @@ y = #"hello"
 
 x = #{#{},#{1},#{1,2}}
 
-hello, world
+_ = hello, world
 
 something\hello(what) a,b
 something\hello what
@@ -163,7 +163,7 @@ a["hello#{tostring ff}"] += 10
 a[four].x += 10
 
 x = 0
-(if ntype(v) == "fndef" then x += 1) for v in *values
+_ = (if ntype(v) == "fndef" then x += 1) for v in *values
 
 
 hello =
@@ -176,10 +176,10 @@ hello =
 
 div class: "cool"
 
-5 + what wack
+_ = 5 + what wack
 what whack + 5
 
-5 - what wack
+_ = 5 - what wack
 what whack - 5
 
 x = hello - world - something
@@ -189,16 +189,16 @@ x = hello - world - something
   print something)!
 
 if something
-  03589
+  _ = 03589
 
 -- okay what about this
 
 else
-  3434
+  _ = 3434
 
 
 if something
-  yeah
+  _ = yeah
 
 
 elseif "ymmm"
@@ -207,7 +207,7 @@ elseif "ymmm"
 
 else
 
-  okay
+  _ = okay
 
 
 -- test names containing keywords
diff --git a/spec/inputs/tables.moon b/spec/inputs/tables.moon
index 2bf66d7..10bccde 100644
--- a/spec/inputs/tables.moon
+++ b/spec/inputs/tables.moon
@@ -138,7 +138,7 @@ thing what:
 thing what:
   "great", no:
     "more"
-okay: 123 -- a anon table
+_ = okay: 123 -- a anon table
 
 
 -- 
diff --git a/spec/inputs/using.moon b/spec/inputs/using.moon
index 55a16a7..e407983 100644
--- a/spec/inputs/using.moon
+++ b/spec/inputs/using.moon
@@ -2,18 +2,18 @@
 hello = "hello"
 world = "world"
 
-(using nil) ->
+_ = (using nil) ->
   hello = 3223
 
-(a using nil) ->
+_ = (a using nil) ->
   hello = 3223
   a = 323
 
-(a,b,c using a,b,c) ->
+_ = (a,b,c using a,b,c) ->
   a,b,c = 1,2,3
   world = 12321
 
-(a,e,f using a,b,c, hello) ->
+_ = (a,e,f using a,b,c, hello) ->
   a,b,c = 1,2,3
   hello = 12321
   world = "yeah"
diff --git a/spec/inputs/whitespace.moon b/spec/inputs/whitespace.moon
index 4a2ff1f..e505b1b 100644
--- a/spec/inputs/whitespace.moon
+++ b/spec/inputs/whitespace.moon
@@ -1,42 +1,42 @@
 
-{
+_ = {
   1, 2
 }
 
-{ 1, 2
+_ = { 1, 2
 }
 
-{ 1, 2 }
+_ = { 1, 2 }
 
-{1,2}
+_ = {1,2}
 
-{
+_ = {
 1,2
 
 }
 
-{ something 1,2,
+_ = { something 1,2,
     4,5,6,
   3,4,5
 }
 
-{
+_ = {
   a 1,2,3,
   4,5,6
   1,2,3
 }
 
 
-{
+_ = {
   b 1,2,3,
     4,5,6
   1,2,3,
     1,2,3
 }
 
-{ 1,2,3 }
+_ = { 1,2,3 }
 
-{ c 1,2,3,
+_ = { c 1,2,3,
 }
 
 
@@ -58,7 +58,7 @@ hello 1,2,3,
   9,9
 
 
-{
+_ = {
   hello 1,2,
   3,4,
   5, 6
diff --git a/spec/inputs/with.moon b/spec/inputs/with.moon
index ae3c8c0..f543356 100644
--- a/spec/inputs/with.moon
+++ b/spec/inputs/with.moon
@@ -37,7 +37,7 @@ do
 
 do
   with foo
-    \prop"something".hello
+    _ = \prop"something".hello
     .prop\send(one)
     .prop\send one
 
@@ -107,7 +107,7 @@ do
       print .c
 
 do
-  ->
+  _ = ->
     with hi
       return .a, .b