new assign compile

moonscript/compile.lua

@@ -326,8 +326,8 @@ local compiler_index = {
 			local ln = node[i]
 			local value = self:stm(ln, return_value and i == len)
 			if type(value) == "table" then
-				for _, v in value do
-					table.insert(lines, value)
+				for _, v in ipairs(value) do
+					table.insert(lines, v)
 				end
 			else
 				table.insert(lines, value)
@@ -386,40 +386,28 @@ local compiler_index = {
 		local _, names, values = unpack(node)
 		local assigns, current = {}, nil
 
-		local function append(t, name, value)
-			if not current or t ~= current[1] then
-				current = {t, {name}, {value}}
-				table.insert(assigns, current)
-			else
-				table.insert(current[2], name)
-				table.insert(current[3], value)
-			end
-		end
-
-		for i, assignee in ipairs(names) do
-			local name_value = self:value(assignee)
-			local value = self:value(values[i])
-
-			if ntype(assignee) == "chain" or self:has_name(assignee) then
-				append("non-local", name_value, value)
-			else
-				append("local", name_value, value)
-			end
-
-			if type(assignee) == "string" then
-				self:put_name(assignee)
+		-- declare undeclared names
+		local undeclared_names = {}
+		for _, name in ipairs(names) do
+			if type(name) == "string" and not self:has_name(name) then
+				table.insert(undeclared_names, name)
+				self:put_name(name)
 			end
 		end
 
 		local lines = {}
-		for _, group in ipairs(assigns) do
-			local t, names, values = unpack(group)
-			if #values == 0 then values = {"nil"} end
-			local line = table.concat(names, ", ").." = "..table.concat(values, ", ")
-			table.insert(lines, t == "local" and "local "..line or line)
+		local num_undeclared = #undeclared_names
+		if num_undeclared > 0 and num_undeclared ~= #names then
+			table.insert(lines, "local "..table.concat(undeclared_names, ", "))
 		end
 
+		local ln = self:name_list(names)..  " = "..table.concat(self:values(values), ", ")
 
+		if num_undeclared == #names then
+			ln = "local "..ln
+		end
+
+		table.insert(lines, ln)
 		return self:pretty(lines)
 	end,
 

tests/outputs/assign.lua

@@ -3,11 +3,10 @@ local _ = function()
   return function(hi)
     local d = 100
     hi = 1021
-    local a, b, c = 1, 2, 3
-    d = 4
-    hello[232], (5 + 5)[121] = 100, 200
-    local hello = 300
-    x[99] = nil
+    local a, b, c
+    a, b, c, d = 1, 2, 3, 4
+    local hello
+    hello[232], (5 + 5)[121], hello, x[99] = 100, 200, 300
     joop = 12
   end
 end

tests/outputs/import.lua

@@ -12,8 +12,8 @@ do
   master = _table_0.master
   ghost = moon.bind(_table_0.ghost, _table_0)
 end
-a = 3434
-local yumm = "hello"
+local yumm
+a, yumm = 3434, "hello"
 local _table_0 = 232
 local something
 do

tests/outputs/syntax.lua

@@ -12,11 +12,11 @@ end)
 local h = function() return hi end
 eat(function() end, world)
 local a = 1 + 2 * 3 / 6
-a = another
-local bunch, go, here = world
+local bunch, go, here
+a, bunch, go, here = another, world
 func(arg1, arg2, another, arg3)
-here = function() end
-local we = yeah
+local we
+here, we = function() end, yeah
 local the, different = function() return approach end, yeah
 dad()
 dad(lord)
@@ -29,8 +29,8 @@ hello(world(what(are(you(doing(here))))))
 what(the)[3243](world, yeck(heck))
 hairy[hands][are](gross)(okay(okay[world]));
 (get[something] + 5)[years]
-local i = 200
-x = 300
+local i
+i, x = 200, 300
 local yeah = (1 + 5) * 3
 yeah = ((1 + 5) * 3) / 2
 yeah = ((1 + 5) * 3) / 2 + i % 100