move extract assign name out, add statement compiles as param

moonscript/compile.lua

@@ -256,6 +256,7 @@ do
     export_all = false,
     export_proper = false,
     value_compilers = value_compilers,
+    statement_compilers = statement_compilers,
     __tostring = function(self)
       local h
       if "string" == type(self.header) then
@@ -288,6 +289,22 @@ do
         end
       end
     end,
+    extract_assign_name = function(self, node)
+      local is_local = false
+      local real_name
+      local _exp_0 = mtype(node)
+      if LocalName == _exp_0 then
+        is_local = true
+        real_name = node:get_name(self)
+      elseif NameProxy == _exp_0 then
+        real_name = node:get_name(self)
+      elseif "table" == _exp_0 then
+        real_name = node[1] == "ref" and node[2]
+      elseif "string" == _exp_0 then
+        real_name = node
+      end
+      return real_name, is_local
+    end,
     declare = function(self, names)
       local undeclared
       do
@@ -297,19 +314,7 @@ do
           local _continue_0 = false
           repeat
             local name = names[_index_0]
-            local is_local = false
+            local real_name, is_local = self:extract_assign_name(name)
-            local real_name
-            local _exp_0 = mtype(name)
-            if LocalName == _exp_0 then
-              is_local = true
-              real_name = name:get_name(self)
-            elseif NameProxy == _exp_0 then
-              real_name = name:get_name(self)
-            elseif "table" == _exp_0 then
-              real_name = name[1] == "ref" and name[2]
-            elseif "string" == _exp_0 then
-              real_name = name
-            end
             if not (is_local or real_name and not self:has_name(real_name, true)) then
               _continue_0 = true
               break
@@ -450,7 +455,7 @@ do
       end
     end,
     is_stm = function(self, node)
-      return statement_compilers[ntype(node)] ~= nil
+      return self.statement_compilers[ntype(node)] ~= nil
     end,
     is_value = function(self, node)
       local t = ntype(node)
@@ -516,7 +521,7 @@ do
       node = self.transform.statement(node)
       local result
       do
-        local fn = statement_compilers[ntype(node)]
+        local fn = self.statement_compilers[ntype(node)]
         if fn then
           result = fn(self, node, ...)
         else

moonscript/compile.moon

@@ -162,6 +162,7 @@ class Block
   export_proper: false
 
   value_compilers: value_compilers
+  statement_compilers: statement_compilers
 
   __tostring: =>
     h = if "string" == type @header
@@ -211,22 +212,28 @@ class Block
     if fn = @_listeners[name]
       fn self, ...
 
+  extract_assign_name: (node) =>
+    is_local = false
+    real_name = switch mtype node
+      when LocalName
+        is_local = true
+        node\get_name self
+      when NameProxy
+        node\get_name self
+      when "table"
+        node[1] == "ref" and node[2]
+      when "string"
+        -- TOOD: some legacy transfomers might use string for ref
+        node
+
+    real_name, is_local
+
   declare: (names) =>
     undeclared = for name in *names
-      is_local = false
+      real_name, is_local = @extract_assign_name name
-      real_name = switch mtype name
-        when LocalName
-          is_local = true
-          name\get_name self
-        when NameProxy then name\get_name self
-        when "table"
-          name[1] == "ref" and name[2]
-        when "string"
-          -- TODO: don't use string literal as ref
-          name
-
       continue unless is_local or real_name and not @has_name real_name, true
-      -- put exported names so they can be assigned to in deeper scope
+      -- this also puts exported names so they can be assigned a new value in
+      -- deeper scope
       @put_name real_name
       continue if @name_exported real_name
       real_name
@@ -322,7 +329,7 @@ class Block
       \append ...
 
   is_stm: (node) =>
-    statement_compilers[ntype node] != nil
+    @statement_compilers[ntype node] != nil
 
   is_value: (node) =>
     t = ntype node
@@ -369,8 +376,8 @@ class Block
     return if not node -- skip blank statements
     node = @transform.statement node
 
-    result = if fn = statement_compilers[ntype(node)]
+    result = if fn = @statement_compilers[ntype(node)]
-      fn self, node, ...
+      fn @, node, ...
     else
       -- coerce value into statement
       if has_value node