More streamlining and cleanup.

11 files changed, 157 insertions, 162 deletions

diff --git a/code_obj.lua b/code_obj.lua
index f628fcc..6dbffca 100644
--- a/code_obj.lua
+++ b/code_obj.lua
@@ -195,6 +195,7 @@ do
       end
       for _index_0 = 1, #vars do
         local var = vars[_index_0]
+        assert(type(var) == 'string')
         if not (seen[var]) then
           self.free_vars[#self.free_vars + 1] = var
           seen[var] = true
@@ -209,7 +210,8 @@ do
       local removals = { }
       for _index_0 = 1, #vars do
         local var = vars[_index_0]
-        removals[var[1]] = true
+        assert(type(var) == 'string')
+        removals[var] = true
       end
       local stack = {
         self
@@ -218,7 +220,8 @@ do
         local lua
         lua, stack[#stack] = stack[#stack], nil
         for i = #lua.free_vars, 1, -1 do
-          if removals[lua.free_vars[i][1]] then
+          local free_var = lua.free_vars[i]
+          if removals[free_var] then
             remove(lua.free_vars, i)
           end
         end
@@ -232,26 +235,6 @@ do
       end
       self.__str = nil
     end,
-    as_statements = function(self, prefix, suffix)
-      if prefix == nil then
-        prefix = ""
-      end
-      if suffix == nil then
-        suffix = ";"
-      end
-      if not (self.is_value) then
-        return self
-      end
-      local statements = LuaCode(self.source)
-      if prefix ~= "" then
-        statements:append(prefix)
-      end
-      statements:append(self)
-      if suffix ~= "" then
-        statements:append(suffix)
-      end
-      return statements
-    end,
     declare_locals = function(self, to_declare)
       if to_declare == nil then
         to_declare = nil
@@ -281,19 +264,30 @@ do
       end
       if #to_declare > 0 then
         self:remove_free_vars(to_declare)
-        self:prepend("local " .. tostring(concat((function()
-          local _accum_0 = { }
-          local _len_0 = 1
-          for _index_0 = 1, #to_declare do
-            local v = to_declare[_index_0]
-            _accum_0[_len_0] = type(v) == 'string' and v or string.as_lua_id(v[1])
-            _len_0 = _len_0 + 1
-          end
-          return _accum_0
-        end)(), ", ")) .. ";\n")
+        self:prepend("local " .. tostring(concat(to_declare, ", ")) .. ";\n")
       end
       return to_declare
     end,
+    as_statements = function(self, prefix, suffix)
+      if prefix == nil then
+        prefix = ""
+      end
+      if suffix == nil then
+        suffix = ";"
+      end
+      if not (self.is_value) then
+        return self
+      end
+      local statements = LuaCode(self.source)
+      if prefix ~= "" then
+        statements:append(prefix)
+      end
+      statements:append(self)
+      if suffix ~= "" then
+        statements:append(suffix)
+      end
+      return statements
+    end,
     __tostring = function(self)
       if self.__str == nil then
         local buff, indents = { }, self.indents
diff --git a/code_obj.moon b/code_obj.moon
index 3daed04..9e2e324 100644
--- a/code_obj.moon
+++ b/code_obj.moon
@@ -115,6 +115,7 @@ class LuaCode extends Code
         return unless #vars > 0
         seen = {[v]:true for v in *@free_vars}
         for var in *vars
+            assert type(var) == 'string'
             unless seen[var]
                 @free_vars[#@free_vars+1] = var
                 seen[var] = true
@@ -124,30 +125,21 @@ class LuaCode extends Code
         return unless #vars > 0
         removals = {}
         for var in *vars
-            removals[var[1]] = true
+            assert type(var) == 'string'
+            removals[var] = true
         
         stack = {self}
         while #stack > 0
             lua, stack[#stack] = stack[#stack], nil
             for i=#lua.free_vars,1,-1
-                if removals[lua.free_vars[i][1]]
+                free_var = lua.free_vars[i]
+                if removals[free_var]
                     remove lua.free_vars, i
             for b in *lua.bits
                 if type(b) != 'string'
                     stack[#stack+1] = b
         @__str = nil
 
-    as_statements: (prefix="", suffix=";")=>
-        unless @is_value
-            return self
-        statements = LuaCode(@source)
-        if prefix != ""
-            statements\append prefix
-        statements\append self
-        if suffix != ""
-            statements\append suffix
-        return statements
-
     declare_locals: (to_declare=nil)=>
         if to_declare == nil
             to_declare, seen = {}, {}
@@ -162,9 +154,20 @@ class LuaCode extends Code
             gather_from self
         if #to_declare > 0
             @remove_free_vars to_declare
-            @prepend "local #{concat [type(v) == 'string' and v or string.as_lua_id(v[1]) for v in *to_declare], ", "};\n"
+            @prepend "local #{concat to_declare, ", "};\n"
         return to_declare
 
+    as_statements: (prefix="", suffix=";")=>
+        unless @is_value
+            return self
+        statements = LuaCode(@source)
+        if prefix != ""
+            statements\append prefix
+        statements\append self
+        if suffix != ""
+            statements\append suffix
+        return statements
+
     __tostring: =>
         if @__str == nil
             buff, indents = {}, @indents
diff --git a/core/collections.nom b/core/collections.nom
index 69a51c7..6ba806a 100644
--- a/core/collections.nom
+++ b/core/collections.nom
@@ -55,6 +55,8 @@ compile [pop from %list, remove last from %list] to
 compile [remove index %index from %list] to
     Lua "table.remove(\(%list as lua expr), \(%index as lua expr))"
 
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
 # List Comprehension
 parse [%expression for %item in %iterable] as
     result of
@@ -73,6 +75,7 @@ parse [..]
             add %expression to %comprehension
         return %comprehension
 
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 parse [%expression for %var in %start to %stop] as
     %expression for %var in %start to %stop via 1
 
diff --git a/core/control_flow.nom b/core/control_flow.nom
index fccdfca..5a96d3e 100644
--- a/core/control_flow.nom
+++ b/core/control_flow.nom
@@ -152,7 +152,7 @@ compile [..]
         %body has subtree % where
             (%.type = "Action") and
                 (%.stub is "do next %") and 
-                    %.3 = %var
+                    %.(3).1 = %var.1
     ..: to %lua write "\n    ::continue_\(%var as lua identifier)::"
     to %lua write "\nend --numeric for-loop"
 
@@ -160,7 +160,7 @@ compile [..]
         %body has subtree % where
             (%.type = "Action") and
                 (%.stub is "stop %") and
-                    %.2 = %var
+                    %.(2).1 = %var.1
     ..
         %lua <-
             Lua ".."
@@ -246,7 +246,7 @@ compile [..]
                     %.2.(1) = %value.(1)
     ..: to %stop_labels write "\n::stop_\(%value as lua identifier)::"
 
-    if: (length of %stop_labels) > 0
+    if: (length of "\%stop_labels") > 0
         %lua <-
             Lua ".."
                 do -- scope for stopping for % = % loop
@@ -300,7 +300,7 @@ compile [when %body] to
             %is_first <- (no)
 
     assume (%fallthroughs = []) or barf "Unfinished fallthrough conditions in 'when' block"
-    assume ((length of %code) > 0) or barf "Empty body for 'when' block"
+    assume ((length of "\%code") > 0) or barf "Empty body for 'when' block"
     to %code write "\nend --when"
     return %code
 
@@ -346,7 +346,7 @@ compile [when %branch_value = ? %body, when %branch_value is ? %body] to
         %is_first <- (no)
     
     assume (%fallthroughs = []) or barf "Unfinished fallthrough conditions in 'when' block"
-    assume ((length of %code) > 0) or barf "No body for 'when % = ?' block!"
+    assume ((length of "\%code") > 0) or barf "No body for 'when % = ?' block!"
     to %code write "\nend"
     %code <-
         Lua ".."
diff --git a/core/metaprogramming.nom b/core/metaprogramming.nom
index d04ced3..a7da3d8 100644
--- a/core/metaprogramming.nom
+++ b/core/metaprogramming.nom
@@ -2,46 +2,92 @@
     This File contains actions for making actions and compile-time actions and some helper
     functions to make that easier.
 
-# Compile-time action to make compile-time actions:
 lua> ".."
-    nomsu.COMPILE_ACTIONS["give % nickname %"] = (function(nomsu, tree, \%action, \%nickname, is_compile_time)
-        local function arg_to_string(a) return tostring(nomsu:compile(a)) end
-        local action_args = table.map(\%action:get_args(), arg_to_string)
-        local nickname_args = table.map(\%nickname:get_args(), arg_to_string)
-        if utils.equivalent(action_args, nickname_args) then
-            if is_compile_time then
-                return LuaCode(tree.source, "nomsu.COMPILE_ACTIONS[", repr(\%nickname.stub), "] = nomsu.COMPILE_ACTIONS[", repr(\%action.stub), "]")
+    nomsu.COMPILE_ACTIONS["% -> %"] = function(nomsu, tree, \%args, \%body)
+        local lua = LuaCode(tree.source, "function(")
+        if AST.is_syntax_tree(\%args, "Action") then \%args = \%args:get_args() end
+        local lua_args = table.map(\%args, function(a) return AST.is_syntax_tree(a) and tostring(nomsu:compile(a)) or a end)
+        lua:concat_append(lua_args, ", ")
+        local body_lua = AST.is_syntax_tree(\%body) and nomsu:compile(\%body):as_statements("return ") or \%body
+        body_lua:remove_free_vars(lua_args)
+        body_lua:declare_locals()
+        lua:append(")\n    ", body_lua, "\nend")
+        return lua
+    end
+
+lua> ".."
+    nomsu.COMPILE_ACTIONS["compile as %"] = function(nomsu, tree, \%action)
+        local lua = LuaCode.Value(tree.source, "nomsu.COMPILE_ACTIONS[", repr(\%action.stub), "](")
+        local lua_args = table.map(\%action:get_args(), function(a) return nomsu:compile(a) end)
+        table.insert(lua_args, 1, "nomsu")
+        table.insert(lua_args, 2, "tree")
+        lua:concat_append(lua_args, ", ")
+        lua:append(")")
+        return lua
+    end
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+lua> ".."
+    nomsu.COMPILE_ACTIONS["compile % to %"] = function(nomsu, tree, \%actions, \%body)
+        local \%args = {"nomsu", "tree", unpack(table.map(\%actions[1]:get_args(), function(a) return tostring(nomsu:compile(a)) end))}
+        local lua = LuaCode(tree.source, "nomsu.COMPILE_ACTIONS[", repr(\%actions[1].stub),
+            "] = ", \(compile as: %args -> %body))
+        for i=2,#\%actions do
+            local alias = \%actions[i]
+            local \%alias_args = {"nomsu", "tree", unpack(table.map(alias:get_args(), function(a) return tostring(nomsu:compile(a)) end))}
+            lua:append("\nnomsu.COMPILE_ACTIONS[", repr(alias.stub), "] = ")
+            if utils.equivalent(\%args, \%alias_args) then
+                lua:append("nomsu.COMPILE_ACTIONS[", repr(\%actions[1].stub), "]")
             else
-                return LuaCode(tree.source, "A", string.as_lua_id(\%nickname.stub), " = A", string.as_lua_id(\%action.stub)) 
+                lua:append("function(")
+                lua:concat_append(\%alias_args, ", ")
+                lua:append(")\n    return nomsu.COMPILE_ACTIONS[", repr(\%actions[1].stub), "](")
+                lua:concat_append(\%args, ", ")
+                lua:append(")\nend")
             end
         end
-        local lua = LuaCode(tree.source)
-        if is_compile_time then
-            lua:append("nomsu.COMPILE_ACTIONS[", repr(\%nickname.stub), "] = ")
-            table.insert(action_args, 1, "nomsu")
-            table.insert(nickname_args, 1, "nomsu")
-            table.insert(action_args, 2, "tree")
-            table.insert(nickname_args, 2, "tree")
-        else
-            lua:append("A", string.as_lua_id(\%nickname.stub), " = ")
-        end
-        lua:append("(function(")
-        lua:concat_append(nickname_args, ", ")
-        if is_compile_time then
-            lua:append(")\n    return nomsu.COMPILE_ACTIONS[", repr(\%action.stub), "](")
-        else
-            lua:append(")\n    return A", string.as_lua_id(\%action.stub), "(")
-        end
-        lua:concat_append(action_args, ", ")
-        lua:append(")\nend)")
-        if not is_compile_time then
-            lua:add_free_vars({"A"..string.as_lua_id(\%nickname.stub)})
+        return lua
+    end
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+compile [local action %actions %body] to
+    lua> ".."
+        local fn_name = "A"..string.as_lua_id(\%actions[1].stub)
+        local \%args = table.map(\%actions[1]:get_args(), function(a) return tostring(nomsu:compile(a)) end)
+        local lua = LuaCode(tree.source, fn_name, " = ", \(compile as: %args -> %body))
+        lua:add_free_vars({fn_name})
+        for i=2,#\%actions do
+            local alias = \%actions[i]
+            local alias_name = "A"..string.as_lua_id(alias.stub)
+            lua:add_free_vars({alias_name})
+            local \%alias_args = table.map(alias:get_args(), function(a) return tostring(nomsu:compile(a)) end)
+            lua:append("\n", alias_name, " = ")
+            if utils.equivalent(\%args, \%alias_args) then
+                lua:append(fn_name)
+            else
+                lua:append("function(")
+                lua:concat_append(\%alias_args, ", ")
+                lua:append(")\n    return ", fn_name, "(")
+                lua:concat_append(\%args, ", ")
+                lua:append(")\nend")
+            end
         end
         return lua
-    end)
 
-    __MANGLE_INDEX = 0
-    nomsu.COMPILE_ACTIONS["parse % as %"] = (function(nomsu, tree, \%actions, \%body)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+compile [action %actions %body] to
+    lua> ".."
+        local lua = \(compile as: local action %actions %body)
+        lua:remove_free_vars(table.map(\%actions, function(a) return "A"..string.as_lua_id(a.stub) end))
+        return lua
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+compile [parse %actions as %body] to
+    lua> ".."
         local replacements = {}
         for i,arg in ipairs(\%actions[1]:get_args()) do
             replacements[arg[1]] = tostring(nomsu:compile(arg))
@@ -50,81 +96,25 @@ lua> ".."
             if not AST.is_syntax_tree(t) then
                 return repr(t)
             elseif t.type ~= 'Var' then
-                local args = table.map(t, make_tree)
-                table.insert(args, 1, repr(tostring(t.source)))
+                local args = {repr(tostring(t.source)), unpack(table.map(t, make_tree))}
                 return t.type.."("..table.concat(args, ", ")..")"
             elseif replacements[t[1]] then
                 return replacements[t[1]]
             else
-                return t.type.."("..repr(tostring(t.source))..", "..repr(t[1].." \\0").."..('%X'):format(__MANGLE_INDEX))"
+                return t.type.."("..repr(tostring(t.source))..", "..repr(t[1].." \\0").."..string.format('%X', __MANGLE_INDEX))"
             end
         end
-        local lua = LuaCode(tree.source, "nomsu.COMPILE_ACTIONS[", repr(\%actions[1].stub), "] = (function(nomsu, tree")
-        lua:add_free_vars({"A"..string.as_lua_id(\%actions[1].stub)})
-        for _,arg in ipairs(\%actions[1]:get_args()) do
-            lua:append(", ", nomsu:compile(arg))
-        end
-        lua:append(")\n    __MANGLE_INDEX = __MANGLE_INDEX + 1",
-            "\n    local tree = ", make_tree(\%body),
-            "\n    local lua = nomsu:compile(tree)",
-            "\n    lua:remove_free_vars({")
-        local vars = table.map(\%actions[1]:get_args(), function(a)
-            return "Var("..repr(tostring(a.source))..", "..repr(a[1])..")"
-        end)
-        lua:concat_append(vars, ", ")
-        lua:append("})\n    return lua\nend)")
-
-        for i=2,#\%actions do
-            lua:append("\n", nomsu.COMPILE_ACTIONS["give % nickname %"](nomsu, \%actions[i], \%actions[1], \%actions[i], true))
-        end
-        return lua
-    end)
-
-    nomsu.COMPILE_ACTIONS["local action % %"] = (function(nomsu, tree, \%actions, \%body, is_compile_time)
-        local lua = LuaCode(tree.source)
-        if is_compile_time then
-            lua:append("nomsu.COMPILE_ACTIONS[", repr(\%actions[1].stub), "] = ")
-        else
-            lua:append("A", string.as_lua_id(\%actions[1].stub), " = ")
-            lua:add_free_vars({"A"..string.as_lua_id(\%actions[1].stub)})
-        end
-        lua:append("(function(")
-        local args = \%actions[1]:get_args()
-        local lua_args = table.map(args, function(a) return nomsu:compile(a) end)
-        if is_compile_time then
-            table.insert(lua_args, 1, "nomsu")
-            table.insert(lua_args, 2, "tree")
-        end
-        lua:concat_append(lua_args, ", ")
-        local body_lua = nomsu:compile(\%body):as_statements("return ")
-        body_lua:remove_free_vars(args)
-        body_lua:declare_locals()
-        lua:append(")\n    ", body_lua, "\nend)")
-        for i=2,#\%actions do
-            lua:append("\n", nomsu.COMPILE_ACTIONS["give % nickname %"](nomsu, \%actions[i], \%actions[1], \%actions[i], is_compile_time))
-        end
-        return lua
-    end)
-
-    -- Compile-time actions are always global, since they affect the state of the compiler
-    nomsu.COMPILE_ACTIONS["compile % to %"] = (function(nomsu, tree, \%actions, \%body)
-        local lua = nomsu.COMPILE_ACTIONS["local action % %"](nomsu, tree, \%actions, \%body, true)
-        return lua
-    end)
-
-    nomsu.COMPILE_ACTIONS["action % %"] = (function(nomsu, tree, \%actions, \%body)
-        local lua = nomsu.COMPILE_ACTIONS["local action % %"](nomsu, tree, \%actions, \%body)
-        lua:remove_free_vars(table.map(\%actions, function(a) return "A"..a.stub:as_lua_id() end))
-        return lua
-    end)
+        local \%new_body = LuaCode(\%body.source,
+            "__MANGLE_INDEX = (__MANGLE_INDEX or 0) + 1",
+            "\nlocal tree = ", make_tree(\%body),
+            "\nreturn nomsu:compile(tree)")
+        return \(compile as: compile %actions to %new_body)
 
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 compile [remove action %action] to
     Lua ".."
         A\(=lua "string.as_lua_id(\(%action.stub))") = nil
-        ARG_ORDERS[fn] = nil
-        COMPILE_TIME[fn] = nil
 
 action [%tree as nomsu]
     =lua "nomsu:tree_to_nomsu(\%tree)"
diff --git a/core/operators.nom b/core/operators.nom
index b4567b1..0756751 100644
--- a/core/operators.nom
+++ b/core/operators.nom
@@ -50,7 +50,7 @@ compile [%var <- %value] to
     lua> ".."
         local lua = LuaCode(tree.source, \%var_lua, ' = ', \%value_lua, ';')
         if \%var.type == 'Var' then
-            lua:add_free_vars({\%var})
+            lua:add_free_vars({tostring(nomsu:compile(\%var))})
         end
         return lua
 
@@ -72,7 +72,7 @@ compile [<- %assignments, assign %assignments] to
             local value_lua = \(%value as lua)
             if not value_lua.is_value then error("Invalid value for assignment: "..\(%value as text)) end
             if \%target.type == "Var" then
-                lhs:add_free_vars({\%target})
+                lhs:add_free_vars({tostring(target_lua)})
             end
             if i > 1 then
                 lhs:append(", ")
@@ -94,7 +94,7 @@ compile [external %var <- %value] to
 
 compile [with external %externs %body] to
     %body_lua <- (%body as lua statements)
-    lua> "\%body_lua:remove_free_vars(\%externs);"
+    lua> "\%body_lua:remove_free_vars(table.map(\%externs, function(v) return tostring(nomsu:compile(v)) end))"
     return %body_lua
 
 compile [with %assignments %body] to
@@ -112,16 +112,15 @@ compile [with %assignments %body] to
             if not value_lua.is_value then
                 error("Invalid value for assignment: "..tostring(\%value))
             end
-            if \%target.type == "Var" then
-                lhs:add_free_vars({\%target})
-            end
             if i > 1 then
                 lhs:append(", ")
                 rhs:append(", ")
             end
             lhs:append(target_lua)
             rhs:append(value_lua)
-            vars[i] = \%target
+            if \%target.type == "Var" then
+                vars[i] = tostring(target_lua)
+            end
         end
         \%lua:remove_free_vars(vars)
         \%lua:prepend("local ", lhs, " = ", rhs, ";\n")
diff --git a/nomsu.lua b/nomsu.lua
index 1ea73ec..f322abf 100644
--- a/nomsu.lua
+++ b/nomsu.lua
@@ -512,7 +512,6 @@ do
     if source == nil then
       source = nil
     end
-    assert(type(lua) ~= 'string', "Attempt to run lua string instead of Lua (object)")
     local lua_string = tostring(lua)
     local run_lua_fn, err = load(lua_string, nil and tostring(source or lua.source), "t", self)
     if not run_lua_fn then
diff --git a/nomsu.moon b/nomsu.moon
index b99d6f4..1e6a89f 100755
--- a/nomsu.moon
+++ b/nomsu.moon
@@ -345,7 +345,6 @@ with NomsuCompiler
         return ret
 
     .run_lua = (lua, source=nil)=>
-        assert(type(lua) != 'string', "Attempt to run lua string instead of Lua (object)")
         lua_string = tostring(lua)
         run_lua_fn, err = load(lua_string, nil and tostring(source or lua.source), "t", self)
         if not run_lua_fn
diff --git a/nomsu_tree.lua b/nomsu_tree.lua
index 05fb22c..227a674 100644
--- a/nomsu_tree.lua
+++ b/nomsu_tree.lua
@@ -9,8 +9,11 @@ local Source
 Source = require("code_obj").Source
 local unpack = unpack or table.unpack
 local AST = { }
-AST.is_syntax_tree = function(n)
-  return type(n) == 'table' and getmetatable(n) and AST[n.type] == getmetatable(n)
+AST.is_syntax_tree = function(n, t)
+  if t == nil then
+    t = nil
+  end
+  return type(n) == 'table' and getmetatable(n) and AST[n.type] == getmetatable(n) and (t == nil or n.type == t)
 end
 local types = {
   "Number",
@@ -37,7 +40,7 @@ for _index_0 = 1, #types do
       return getmetatable(x) == self
     end
     cls.__tostring = function(self)
-      return tostring(self.name) .. "(" .. tostring(concat((function()
+      return tostring(self.type) .. "(" .. tostring(repr(tostring(self.source))) .. ", " .. tostring(concat((function()
         local _accum_0 = { }
         local _len_0 = 1
         for _index_1 = 1, #self do
diff --git a/nomsu_tree.moon b/nomsu_tree.moon
index 71bcff9..b754cd8 100644
--- a/nomsu_tree.moon
+++ b/nomsu_tree.moon
@@ -6,8 +6,8 @@
 unpack or= table.unpack
 
 AST = {}
-AST.is_syntax_tree = (n)->
-    type(n) == 'table' and getmetatable(n) and AST[n.type] == getmetatable(n)
+AST.is_syntax_tree = (n, t=nil)->
+    type(n) == 'table' and getmetatable(n) and AST[n.type] == getmetatable(n) and (t == nil or n.type == t)
 
 types = {"Number", "Var", "Block", "EscapedNomsu", "Text", "List", "Dict", "DictEntry",
     "IndexChain", "Action", "FileChunks"}
@@ -19,7 +19,7 @@ for name in *types
         .__name = name
         .type = name
         .is_instance = (x)=> getmetatable(x) == @
-        .__tostring = => "#{@name}(#{concat([repr(v) for v in *@], ', ')})"
+        .__tostring = => "#{@type}(#{repr tostring(@source)}, #{concat([repr(v) for v in *@], ', ')})"
         .map = (fn)=>
             if replacement = fn(@) then return replacement
             replacements = [AST.is_syntax_tree(v) and v\map(fn) or nil for v in *@]
diff --git a/parser.lua b/parser.lua
index d48c435..e995c3c 100644
--- a/parser.lua
+++ b/parser.lua
@@ -9,6 +9,11 @@ do
   local _obj_0 = string
   match, sub, rep, gsub, format, byte, match, find = _obj_0.match, _obj_0.sub, _obj_0.rep, _obj_0.gsub, _obj_0.format, _obj_0.byte, _obj_0.match, _obj_0.find
 end
+local NomsuCode, LuaCode, Source
+do
+  local _obj_0 = require("code_obj")
+  NomsuCode, LuaCode, Source = _obj_0.NomsuCode, _obj_0.LuaCode, _obj_0.Source
+end
 local AST = require("nomsu_tree")
 local NOMSU_DEFS
 do