Improving codegen line wrapping.

code_obj.lua

@@ -85,21 +85,27 @@ do
         local _continue_0 = false
         repeat
           local b = select(i, ...)
-          assert(b, "bit is nil")
+          assert(b, "code bit is nil")
           if b == '' then
             _continue_0 = true
             break
           end
           bits[#bits + 1] = b
           if type(b) == 'string' then
-            do
-              local spaces = match(b, "\n([ ]*)[^\n]*$")
-              if spaces then
-                self.current_indent = #spaces
-              end
+            local trailing_text, spaces = match(b, "\n(([ ]*)[^\n]*)$")
+            if trailing_text then
+              self.current_indent = #spaces
+              self.trailing_line_len = #trailing_text
+            end
+          else
+            if #b.indents > 1 then
+              self.trailing_line_len = b.trailing_line_len
+            else
+              self.trailing_line_len = self.trailing_line_len + #tostring(b)
+            end
+            if self.current_indent ~= 0 then
+              indents[#bits] = self.current_indent
             end
-          elseif self.current_indent ~= 0 then
-            indents[#bits] = self.current_indent
           end
           _continue_0 = true
         until true
@@ -172,7 +178,9 @@ do
   _class_0 = setmetatable({
     __init = function(self, source, ...)
       self.source = source
-      self.bits, self.indents, self.current_indent = { }, { }, 0
+      self.bits = { }
+      self.indents, self.current_indent = { }, 0
+      self.trailing_line_len = 0
       if type(self.source) == 'string' then
         self.source = Source:from_string(self.source)
       end

code_obj.moon

@@ -45,7 +45,9 @@ class Source
 
 class Code
     new: (@source, ...)=>
-        @bits, @indents, @current_indent = {}, {}, 0
+        @bits = {}
+        @indents, @current_indent = {}, 0
+        @trailing_line_len = 0
         if type(@source) == 'string'
             @source = Source\from_string(@source)
         assert(@source and Source\is_instance(@source), "Source has the wrong type")
@@ -57,14 +59,21 @@ class Code
         match = string.match
         for i=1,n
             b = select(i, ...)
-            assert(b, "bit is nil")
+            assert(b, "code bit is nil")
             if b == '' then continue
             bits[#bits+1] = b
             if type(b) == 'string'
-                if spaces = match(b, "\n([ ]*)[^\n]*$")
+                trailing_text, spaces = match(b, "\n(([ ]*)[^\n]*)$")
+                if trailing_text
                     @current_indent = #spaces
-            elseif @current_indent != 0
-                indents[#bits] = @current_indent
+                    @trailing_line_len = #trailing_text
+            else
+                if #b.indents > 1
+                    @trailing_line_len = b.trailing_line_len
+                else
+                    @trailing_line_len += #tostring(b)
+                if @current_indent != 0
+                    indents[#bits] = @current_indent
         @__str = nil
             
     concat_append: (values, joiner, wrapping_joiner)=>

nomsu_compiler.lua

@@ -150,7 +150,7 @@ local NomsuCompiler = setmetatable({ }, {
   end
 })
 do
-  NomsuCompiler.NOMSU_COMPILER_VERSION = 3
+  NomsuCompiler.NOMSU_COMPILER_VERSION = 4
   NomsuCompiler.NOMSU_SYNTAX_VERSION = Parser.version
   NomsuCompiler._ENV = NomsuCompiler
   NomsuCompiler.nomsu = NomsuCompiler
@@ -259,20 +259,14 @@ do
   end
   local add_lua_string_bits
   add_lua_string_bits = function(self, val_or_stmt, code)
-    local line_len = 0
     local cls_str = val_or_stmt == "value" and "LuaCode.Value(" or "LuaCode("
     if code.type ~= "Text" then
       return LuaCode(code.source, cls_str, repr(tostring(code.source)), ", ", self:compile(code), ")")
     end
     local add_bit_lua
     add_bit_lua = function(lua, bit_lua)
-      line_len = line_len + #tostring(bit_lua)
-      if line_len > MAX_LINE then
-        lua:append(",\n    ")
-        line_len = 4
-      else
-        lua:append(", ")
-      end
+      local bit_leading_len = #(tostring(bit_lua):match("^[^\n]*"))
+      lua:append(lua.trailing_line_len + bit_leading_len > MAX_LINE and ",\n    " or ", ")
       return lua:append(bit_lua)
     end
     local operate_on_text

nomsu_compiler.moon

@@ -92,7 +92,7 @@ dict = (t)-> setmetatable(t, _dict_mt)
 MAX_LINE = 80 -- For beautification purposes, try not to make lines much longer than this value
 NomsuCompiler = setmetatable({}, {__index: (k)=> if _self = rawget(@, "self") then _self[k] else nil})
 with NomsuCompiler
-    .NOMSU_COMPILER_VERSION = 3
+    .NOMSU_COMPILER_VERSION = 4
     .NOMSU_SYNTAX_VERSION = Parser.version
     ._ENV = NomsuCompiler
     .nomsu = NomsuCompiler
@@ -157,18 +157,13 @@ with NomsuCompiler
         return operate_on_text code
 
     add_lua_string_bits = (val_or_stmt, code)=>
-        line_len = 0
         cls_str = val_or_stmt == "value" and "LuaCode.Value(" or "LuaCode("
         if code.type != "Text"
             return LuaCode(code.source, cls_str, repr(tostring(code.source)), ", ", @compile(code), ")")
         add_bit_lua = (lua, bit_lua)->
-            line_len += #tostring(bit_lua)
-            if line_len > MAX_LINE
-                lua\append ",\n    "
-                line_len = 4
-            else
-                lua\append ", "
-            lua\append bit_lua
+            bit_leading_len = #(tostring(bit_lua)\match("^[^\n]*"))
+            lua\append(lua.trailing_line_len + bit_leading_len > MAX_LINE and ",\n    " or ", ")
+            lua\append(bit_lua)
         operate_on_text = (text)->
             lua = LuaCode.Value(text.source, cls_str, repr(tostring(text.source)))
             for bit in *text