set posmap for declare on assign for functions

moonscript/compile.lua

@@ -415,8 +415,14 @@ do
       })
       return name
     end,
-    add = function(self, item)
+    add = function(self, item, pos)
-      self._lines:add(item)
+      do
+        local _with_0 = self._lines
+        _with_0:add(item)
+        if pos then
+          _with_0:mark_pos(pos)
+        end
+      end
       return item
     end,
     render = function(self, buffer)

moonscript/compile.moon

@@ -288,9 +288,11 @@ class Block
     @stm {"assign", {name}, {value}}
     name
 
-  -- add a line object
+  -- add something to the line buffer
-  add: (item) =>
+  add: (item, pos) =>
-    @_lines\add item
+    with @_lines
+      \add item
+      \mark_pos pos if pos
     item
 
   -- todo: pass in buffer as argument

moonscript/compile/statement.lua

@@ -78,7 +78,7 @@ return {
         _with_0:append(declare)
       else
         if #undeclared > 0 then
-          self:add(declare)
+          self:add(declare, node[-1])
         end
         _with_0:append_list((function()
           local _accum_0 = { }

moonscript/compile/statement.moon

@@ -43,7 +43,7 @@ import concat, insert from table
       if #undeclared == #names and not has_fndef
         \append declare
       else
-        @add declare if #undeclared > 0
+        @add declare, node[-1] if #undeclared > 0
         \append_list [@value name for name in *names], ", "
 
       \append " = "