From 5a3c1261007a456ea7f8016d2f77aac624a8dff8 Mon Sep 17 00:00:00 2001
From: Christian Lincoln <cl1925@ic.ac.uk>
Date: Wed, 14 Jan 2026 00:29:34 +0000
Subject: [PATCH] Added more bindings and error tracebacks.

---
 helper.lua    |  12 ++-
 interpret.lua |  29 ++++---
 main.lua      | 191 ++++++++++++++++++++++++++++++----------------
 parse.lua     | 117 ++++++++++++++++++++++++----
 session.vim   | 205 ++++++++++++++++++++++++++++++++++++++++++++++++++
 test.nel      |   9 +--
 6 files changed, 464 insertions(+), 99 deletions(-)
 create mode 100644 session.vim

diff --git a/helper.lua b/helper.lua
index dc3a149..1ea4e70 100644
--- a/helper.lua
+++ b/helper.lua
@@ -8,6 +8,13 @@ end
 function log(...)
   old_print(...)
 end
+function map(tab,func)
+  local new = {}
+  for index,item in pairs(tab) do
+    new[index] = func(item)
+  end
+  return new
+end
 -- HELPER FUNCTIONS
 -- Insert every item in t1 into t0
 function just(...)
@@ -105,7 +112,8 @@ end
 -- Runs a function 
 function assert_meta(...)
   local metas = {...}
-  return function(x,raise)
+  return function(x,raise,handler)
+    handler = handler or error
     local meta = getmetatable(x)
     for tab in iterate(metas) do
       if meta == tab then return end
@@ -124,7 +132,7 @@ function assert_meta(...)
       level = 3
       msg = string.format(raise,msg)
     end
-    error(msg,level)
+    handler(msg,level)
   end
 end
 
diff --git a/interpret.lua b/interpret.lua
index 7a1de85..7e26cca 100644
--- a/interpret.lua
+++ b/interpret.lua
@@ -3,7 +3,7 @@ require("parse")
 -- TODO: This should really be a separate API and module
 -- please break it out
 -- Interpret some text
-function interpret(content)
+function interpret(content,uri,chain)
   -- LOCALS
   -- The pattern for words inbetween expressions
   local expressionWordPattern = "(.*)"
@@ -26,8 +26,17 @@ function interpret(content)
         consumeText,
         consumeNumber
 
-  local baseExpression = Expression()
+
   local consumer = Consumer(content)
+  local function expression(...)
+    return Expression(...):locate(
+      string.format(
+        "%i:%i",
+        consumer.row,
+        consumer.col
+      ),uri)
+  end
+  local baseExpression = expression()
 
   -- FUNCTIONS
   -- Consume an expression, with its sub expressions
@@ -37,7 +46,7 @@ function interpret(content)
     return function(words,_)
       current:insert(words,consumer:consume({
         [match] = function(words,_)
-          return Expression({"text",Expression({words})})
+          return expression({"text",Expression({words})})
         end
       }))
     end
@@ -51,7 +60,7 @@ function interpret(content)
           error("Incomplete string literal")
         end,
         [match] = function(words,_)
-          return Expression({"text",Expression({words})})
+          return expression({"text",Expression({words})})
         end
       }))
     end
@@ -62,7 +71,7 @@ function interpret(content)
     return function(words,_)
       current:insert(words,consumer:consume({
         ["[\n\r]"] = function()
-          error("Incomplete URI literal")
+          current:error("Incomplete URI literal")
         end,
         [match] = function(path)
           return read(path)
@@ -77,7 +86,7 @@ function interpret(content)
   end
   function consumeBlock()
     local expressions = {}
-    local current = Expression()
+    local current = expression()
     local loop = true
     while loop do
       local expr = consumer:consume({
@@ -94,7 +103,7 @@ function interpret(content)
             error("Extravenous semicolon.")
           end
           table.insert(expressions,current)
-          current = Expression()
+          current = expression()
         end,
         [blockClosePattern] = function(words,_)
           current:insert(words)
@@ -105,10 +114,10 @@ function interpret(content)
     if #current.items ~= 0 then
       table.insert(expressions,current)
     end
-    return Expression(expressions)
+    return expression(expressions)
   end
   function consumeExpression()
-    local current = Expression()
+    local current = expression()
     -- Loop, adding new expressions and words,
     -- until closing that is
     local loop = true
@@ -116,7 +125,7 @@ function interpret(content)
       local remaining = consumer:remaining()
       local expr = consumer:consume({
         [uriOpenPattern] = URIMeal(current,uriClosePattern),
-        [expressionOpenPattern] = expressionMeal(remaining),
+        [expressionOpenPattern] = expressionMeal(current),
         [multiLineStringOpenPattern] = 
           multiLineStringMeal(
             current,multiLineStringClosePattern),
diff --git a/main.lua b/main.lua
index 517b301..6e7baae 100644
--- a/main.lua
+++ b/main.lua
@@ -9,17 +9,23 @@ local function B(abstract,callback)
     )
   )
 end 
-B("print (text)",function(s,e)
-  log(s:evaluate(e.text))
+local function R(scope,expression,chain,name)
+  name = name or "?"
+  assert_meta(Chain)(chain,"Arg 'chain' #1: %s")
+  local chain = Chain(expression:link(name)):from(chain)
+  return scope:run(expression,chain)
+end
+B("print (text)",function(s,e,c)
+  log(R(s,e.text,c,"print: text"))
 end)
-B("text (literal)",function(s,e)
+B("text (literal)",function(s,e,c)
   return e.literal:text()
 end)
-B("do (expressions)",function(s,e)
+B("do (expressions)",function(s,e,c)
+  --assert_meta(Chain)(chain,"Arg 'chain' #3: %s")
   scope = Scope()
   scope.parent = s
   local res
-  print(e.expressions)
   for item in iterate(e.expressions.items) do
     if type_of(item) ~= Expression then 
       error(
@@ -29,99 +35,122 @@ B("do (expressions)",function(s,e)
         )
       )
     end
-    res = scope:evaluate(item)
+    res = R(s,item,c,"do: line")
   end
   return res
 end)
-B("if (predicate) then (expression)",function(s,e)
-  if s:evaluate(e.predicate) then
-    return s:evaluate(e.expression)
+B("error (text)",function(s,e,c)
+  error("nel: "..R(s,e.text,c,"error: message"))
+end)
+B("if (predicate) then (expression)",function(s,e,c)
+  if R(s,e.predicate,c,"if: predicate") then
+    return R(s,e.expression,c,"if: result")
   end
 end)
-B("true",function(s,e) return true end)
-B("false",function(s,e) return false end)
-B("(constant) = (expression)",function(s,e)
-  local value = s:evaluate(e.expression)
+B("true",function(s,e,c) return true end)
+B("false",function(s,e,c) return false end)
+B("(constant) = (expression)",function(s,e,c)
+  local value = R(s,e.expression,c,"constant: expression")
   s:insert(
-    Binding(e.constant:text(),function(s,e)
+    Binding(e.constant:text(),function(s,e,c)
       return value
     end)
   )
 end)
-B("format (string) with (terms)",function(s,e)
+B("format (string) with (terms)",function(s,e,c)
   local items = {}
   for expression in iterate(e.terms.items) do
-    table.insert(items,s:evaluate(expression))
+    table.insert(items,R(s,expression),c,"format: term")
   end
   return string.format(
-    s:evaluate(e.string),
+    R(s,e.string,c,"format: string"),
     table.unpack(items)
   )
 end)
-B("while (predicate) (expression)",function(s,e)
-  while s:evaluate(e.predicate) do
-    s:evaluate(e.expression)
+B("while (predicate) (expression)",function(s,e,c)
+  while R(s,e.predicate,c,"while: predicate") do
+    R(s,e.expression,c,"while: loop")
   end
 end)
-B("repeat (expression) while (predicate)",function(s,e)
+B("repeat (expression) while (predicate)",function(s,e,c)
   while true do
-    s:evaluate(e.expression)
-    if not s:evaluate(e.predicate) then
+    R(s,e.expression,c,"repeat: expression")
+    if not R(s,e.predicate,c,"repeat: predicate") then
       break
     end
   end
-end
-B("repeat (expression) until (predicate)",function(s,e)
+end)
+B("repeat (expression) until (predicate)",function(s,e,c)
   while true do
-    s:evaluate(e.expression)
-    if s:evaluate(e.predicate) then
+    R(s,e.expression,c,"repeat: expression")
+    if R(s,e.predicate,c,"repeat: predicate") then
       break
     end
   end
-end
-B("new table",function(s,e)
+end)
+B("new table",function(s,e,c)
   return {}
 end)
-B("(index) of (table)",function(s,e)
-  return s:evaluate(e.table)[s:evaluate(e.index)]
+B("(index) of (table)",function(s,e,c)
+  return (R(s,e.table,"of: index"))[R(s,e.index,c,"of: table")]
 end)
-B("set (index) of (table) to (item)",function(s,e)
-  s:evaluate(e.table)[s:evaluate(e.index)]
+B("set (index) of (table) to (item)",function(s,e,c)
+  R(s,e.table,c,"of-to: index")[R(s,e.index,c,"of-to: table")] = s:run(e.item,c,"of-to: item")
 end)
-B("macro (macro) expands to (expression)",function(s,e)
-  s:insert(Binding(e.abstract,function(_s,_e)
+B("remove (index) of (table)",function(s,e,c)
+  (R(s,e.table,"remove: table"))[R(s,e.index,c,"remove: index")] = nil
+end)
+B("nil",function(s,e,c)
+  return nil
+end)
+--[[ Note
+A macro executes in the same scope of the callee.
+A defintion executes in the scope it was defined.
+I would argue that macros are more unpredictable!
+However, they allow for some very clean code.
+--]]
+B("macro (macro) expands to (expression)",function(s,e,c)
+  s:insert(Binding(e.abstract,function(_s,_e,_c)
+    local scope = Scope()
+    scope.parent = _s
     for identifier,expression in pairs(_e) do
-      
+      scope:insert(Binding(Expression({identifier}),R(_s,expression,_c)))
     end
-    _s:evaluate(e.expression)
-  end)
+    return R(scope,e.expression,_c,"macro: expression")
+  end))
 end)
-B("define (abstract) as (expression)",function(s,e)
-  s:insert(Binding(e.abstract,function(_s,_e)
-    return s:evaluate(e.expression)
+B("define (abstract) as (expression)",function(s,e,c)
+  s:insert(Binding(e.abstract,function(_s,_e,_c)
+    local scope = Scope()
+    scope.parent = s
+    for identifier,expression in pairs(_e) do
+      scope:insert(Binding(Expression({identifier}),R(_s,expression,_c)))
+    end
+    return R(scope,e.expression,_c,"define: expression")
   end))
 end)
 local List = class("List")
-function List:new(...) do
+function List:new(...)
   self.items = {...}
 end
-B("new list",function(s,e)
+B("new list",function(s,e,c)
   return List()
 end)
-B("insert (item) into (list)",function(s,e)
-
+B("insert (item) into (list)",function(s,e,c)
+  table.insert(R(s,e.list).items,R(s,e.item),c,c)
 end)
-B("insert (item) into (list) at (index)",function(s,e)
-
+B("insert (item) into (list) at (index)",function(s,e,c)
+  table.insert(s:evaulate(e.list).items,R(s,e.index),R(s,item),c,c)
 end)
-B("remove (needle) from (haystack)",function(s,e)
-
+B("remove (needle) from (haystack)",function(s,e,c)
+  local tab = R(s,e.haystack,c)
+  table.remove(tab,table.find(tab,R(s,e.needle)),c)
 end)
-B("remove from (haystack) at (index)",function(s,e)
-  s:evaluate(e.haystack)
+B("remove from (haystack) at (index)",function(s,e,c)
+  table.remove(R(s,e.list),R(s,e.index),c,c)
 end)
 
-local Variable = class()
+local Variable = class("Variable")
 function Variable:new()
 end
 function Variable:set(item)
@@ -130,36 +159,66 @@ end
 function Variable:get()
   return self.data
 end
-B("let (variable)",function(s,e)
+B("let (variable)",function(s,e,c)
   local variable = Variable()
   s:insert(
-    Binding(e.variable,function(s,e)
+    Binding(e.variable,function(s,e,c)
       return variable
     end)
   )
   return variable
 end)
-B("set (variable) to (expression)",function(s,e)
-  local var = s:evaluate(e.variable)
-  local value = s:evaluate(e.expression)
+B("set (variable) to (expression)",function(s,e,c)
+  local var = R(s,e.variable,c,"set: identifier")
+  local value = R(s,e.expression,c,"set: expression")
   assert_meta(Variable)(var)
   var:set(value)
 end)
-B("get (variable)",function(s,e)
-  local var = s:evaluate(e.variable)
-  assert_meta(Variable)(var)
+B("get (variable)",function(s,e,c)
+  local var = R(s,e.variable,c)
   return var:get(value)
 end)
-for item in iterate(nelli_scope.bindings) do
-  print(item.template)
-end
 
 local args = {...}
 local function main()
   -- Take arguments as neli files to read and interpret
-  for _,parameter in pairs(args) do
-    local root = interpret(read(parameter))
-    nelli_scope:evaluate(root)
+  local last
+  local root = Chain(
+    string.format(
+      "in cmd 'nel {%s}'",
+      table.concat(args,";")
+    )
+  )
+  local success,result = xpcall(function()
+    for _,parameter in pairs(args) do
+      last = parameter
+      local chain = Chain(
+        string.format("in 'call: root' @'%s'",parameter)
+      ):from(root)
+      local root = interpret(
+        read(parameter),
+        parameter,
+        chain
+      )
+      assert_meta(Chain)(chain,"?")
+      nelli_scope:run(root,chain)
+    end
+  end,function(msg)
+    -- If this is a 'nel:' error, strip the line responsible
+    -- Otherwise just return the whole traceback since something went really bad
+    local match = msg:match("nel:%s(.*)")
+    if match then
+      return match
+    else
+      return "internal: "..debug.traceback(msg,2)
+    end
+  end)
+  if not success then
+    log(string.format(
+      "nel: %s\nNEL traceback:\n\t%s",
+      result,
+      table.concat(root:flatten(),"\n\t")
+    ))
   end
 end
 
diff --git a/parse.lua b/parse.lua
index 8849831..f5ac7bb 100644
--- a/parse.lua
+++ b/parse.lua
@@ -1,4 +1,5 @@
 require("helper")
+
 -- CLASS DEFINITIONS
 -- A stream of text (kind of)
 -- with some helping methods
@@ -128,13 +129,32 @@ function Expression:text()
   if type(text) ~= "string" then return end
   return text
 end
+function Expression:locate(str,uri)
+  self.location = str
+  self.source = uri
+  return self
+end
+function Expression:link(msg)
+  return string.format(
+    "in '%s' @%s (%s)",
+    msg,
+    tostring(self),
+    tostring(self.location or "?"),
+    tostring(self.source or "?.nel")
+  )
+end
 
 Consumer = class("Consumer")
 function Consumer:new(content)
   self.range = Range(Reader(content))
+  self.col = 1
+  self.row = 1
 end
 function Consumer:remaining()
   return self.range:text()
+end
+function Consumer:mark()
+
 end
 -- From a table of actions of patterns,
 -- consume the earliest pattern (index)
@@ -149,6 +169,7 @@ function Consumer:consume(t)
     assert_type("string")(index,"Bad 't' index: %s")
     assert_type("function")(func,"Bad 't' item: %s")
   end
+  local origin = self.range.first or 1
   -- Get the next earliest match
   local findex,ffinal,fpattern,ffunc,fexcess
   for pattern,new_func in pairs(t) do
@@ -173,8 +194,20 @@ function Consumer:consume(t)
   end
   assert(findex) assert(ffinal)
   self.range:move(ffinal+1) -- Move range to after the match
+  local fmatch = self.range.reader:match(fpattern,findex)
   -- Pass back consumed result to
-  return ffunc(fexcess,self.range.reader:match(fpattern,findex))
+  local sum = self.range.reader:get(origin+1,self.range.first)
+    :gsub("\r\n","\n")
+    :gsub("\r","\n")
+  for char in sum:gmatch(".") do
+    if char == "\n" then 
+      self.row = self.row + 1
+      self.col = 1
+    else
+      self.col = self.col + 1
+    end
+  end
+  return ffunc(fexcess,fmatch)
 end
 
 Binding = class("Binding")
@@ -182,12 +215,20 @@ Binding = class("Binding")
 -- note that you must wrap this definition in "(<def>)"!
 function Binding:new(expression,callback)
   assert_meta(Expression)(expression,"Arg 'expression' #1: %s")
-  assert_type("function")(callback,"Arg 'callback' #2: %s")
+  if type_of(callback) == "function" then
+    self.callback = callback
+  else
+    self.value = callback
+  end
   self.template = expression:abstract(true)
-  self.callback = callback
 end
-function Binding:call(scope,binds)
-  return self.callback(scope,binds)
+function Binding:string()
+  return string.format("Binding %s: %s",self.template,tostring(self.value or self.callback))
+end
+function Binding:call(s,e,c)
+  assert_meta(Scope)(s)
+  assert_meta(Chain)(c)
+  return self.value or self.callback(s,e,c)
 end
 function Binding:check(expression)
   assert_meta(Expression)(expression,"Arg 'expression' #1: %s")
@@ -228,6 +269,29 @@ function Binding:check(expression)
   end
 end
 
+Chain = class("Chain")
+function Chain:new(data)
+  assert_type("string")(data,"Arg 'data' #1: %s")
+  self.data = data
+end
+function Chain:from(previous)
+  assert_meta(Chain)(previous,"Arg 'previous' #1: %s")
+  previous.next = self
+  self.previous = previous 
+  return self
+end
+function Chain:string()
+  return string.format("Chain:%s",table.concat(self:flatten(),", "))
+end
+function Chain:flatten(tab)
+  tab = tab or {}
+  if self.next then
+    self.next:flatten(tab)
+  end
+  table.insert(tab,self.data)
+  return tab
+end
+
 -- The scope of a neli expression under evaluation
 -- without exact faith to traditional language scopes
 Scope = class("Scope")
@@ -237,13 +301,22 @@ function Scope:new(bindings)
     self:insert(binding)
   end
 end
+function Scope:string()
+  return string.format("Scope: {\n\t%s\n}",table.concat(map(self.bindings,tostring),"\n\t"))
+end
 function Scope:insert(binding)
-  assert_meta(binding,Binding)
+  assert_meta(Binding)(binding,"Arg 'binding' #1: %s")
+  for competitor in iterate(self.bindings) do
+    if competitor:check(binding.template) then
+      nerror("Conflicting sibling bindings in scope.")
+    end
+  end
   table.insert(self.bindings,binding)
 end
-function Scope:evaluate(expression)
+function Scope:run(expression,chain,original)
+  original = original or self
   assert_meta(Expression)(expression,"Arg 'expression' #1: %s")
-  local parent = self.parent
+  assert_meta(Chain)(chain,"Arg 'chain' #2: %s")
     -- Could be multiple bindings so make a table
   local binds = {}
   for binding in iterate(self.bindings) do
@@ -254,13 +327,23 @@ function Scope:evaluate(expression)
   local binding,bind = next(binds)
   -- Check for multiple
   if not bind then
-    if parent then
-      parent:evaluate(expression)
+    if self.parent then
+      return self.parent:run(expression,chain,self)
     else
+      local extra = ""
+      if #expression.items == 1 then
+        local item = expression.items[1]
+        if type_of(item) == Expression then
+          extra = extra .. "\nNote: This expression is formed (just bracketed) of another single expression. Maybe too many brackets were used here?"
+        else
+          extra = extra .. "\n\tNote: This is a 'text' expression, it has no subexpressions. It is most likely that an expected object definition was not bound to the scope or there is a typo."
+        end
+      end
       error(
         string.format(
-          "No binding for '%s' in transitive scope.",
-          tostring(expression)
+          "nel: No binding for '%s' in scope.",
+          tostring(expression:abstract()),
+          extra
         ),3
       )
     end
@@ -272,13 +355,17 @@ function Scope:evaluate(expression)
     end
     error(
       string.format(
-        "Ambiguous bindings in scope for '%s': %s",
+        "nel: Ambiguous bindings in scope for '%s': %s",
         tostring(expression:abstract()),
         table.concat(candidates)
       )
     ,2)
   else
-    return binding:call(self,bind)
-  end
+    return binding:call(
+      original,
+      bind,
+      chain
+    )
+  end  
 end
 return _G
diff --git a/session.vim b/session.vim
new file mode 100644
index 0000000..9367218
--- /dev/null
+++ b/session.vim
@@ -0,0 +1,205 @@
+let SessionLoad = 1
+let s:so_save = &g:so | let s:siso_save = &g:siso | setg so=0 siso=0 | setl so=-1 siso=-1
+let v:this_session=expand("<sfile>:p")
+silent only
+silent tabonly
+cd ~/Programming/nel/1
+if expand('%') == '' && !&modified && line('$') <= 1 && getline(1) == ''
+  let s:wipebuf = bufnr('%')
+endif
+let s:shortmess_save = &shortmess
+if &shortmess =~ 'A'
+  set shortmess=aoOA
+else
+  set shortmess=aoO
+endif
+badd +167 main.lua
+badd +27 parse.lua
+badd +0 term://~/Programming/nel/1//1946:/usr/bin/zsh
+badd +0 interpret.lua
+badd +0 test.nel
+badd +191 helper.lua
+argglobal
+%argdel
+$argadd ~/Programming/nel/1
+edit parse.lua
+let s:save_splitbelow = &splitbelow
+let s:save_splitright = &splitright
+set splitbelow splitright
+wincmd _ | wincmd |
+vsplit
+1wincmd h
+wincmd _ | wincmd |
+split
+1wincmd k
+wincmd _ | wincmd |
+vsplit
+1wincmd h
+wincmd w
+wincmd w
+wincmd w
+wincmd _ | wincmd |
+split
+1wincmd k
+wincmd w
+let &splitbelow = s:save_splitbelow
+let &splitright = s:save_splitright
+wincmd t
+let s:save_winminheight = &winminheight
+let s:save_winminwidth = &winminwidth
+set winminheight=0
+set winheight=1
+set winminwidth=0
+set winwidth=1
+exe '1resize ' . ((&lines * 24 + 19) / 39)
+exe 'vert 1resize ' . ((&columns * 60 + 90) / 181)
+exe '2resize ' . ((&lines * 24 + 19) / 39)
+exe 'vert 2resize ' . ((&columns * 60 + 90) / 181)
+exe '3resize ' . ((&lines * 12 + 19) / 39)
+exe 'vert 3resize ' . ((&columns * 121 + 90) / 181)
+exe '4resize ' . ((&lines * 24 + 19) / 39)
+exe 'vert 4resize ' . ((&columns * 59 + 90) / 181)
+exe '5resize ' . ((&lines * 12 + 19) / 39)
+exe 'vert 5resize ' . ((&columns * 59 + 90) / 181)
+argglobal
+setlocal foldmethod=manual
+setlocal foldexpr=v:lua.vim.treesitter.foldexpr()
+setlocal foldmarker={{{,}}}
+setlocal foldignore=#
+setlocal foldlevel=0
+setlocal foldminlines=1
+setlocal foldnestmax=20
+setlocal foldenable
+silent! normal! zE
+let &fdl = &fdl
+let s:l = 267 - ((8 * winheight(0) + 12) / 24)
+if s:l < 1 | let s:l = 1 | endif
+keepjumps exe s:l
+normal! zt
+keepjumps 267
+normal! 019|
+lcd ~/Programming/nel/1
+wincmd w
+argglobal
+if bufexists(fnamemodify("~/Programming/nel/1/interpret.lua", ":p")) | buffer ~/Programming/nel/1/interpret.lua | else | edit ~/Programming/nel/1/interpret.lua | endif
+if &buftype ==# 'terminal'
+  silent file ~/Programming/nel/1/interpret.lua
+endif
+balt ~/Programming/nel/1/parse.lua
+setlocal foldmethod=manual
+setlocal foldexpr=v:lua.vim.treesitter.foldexpr()
+setlocal foldmarker={{{,}}}
+setlocal foldignore=#
+setlocal foldlevel=0
+setlocal foldminlines=1
+setlocal foldnestmax=20
+setlocal foldenable
+silent! normal! zE
+let &fdl = &fdl
+let s:l = 58 - ((15 * winheight(0) + 12) / 24)
+if s:l < 1 | let s:l = 1 | endif
+keepjumps exe s:l
+normal! zt
+keepjumps 58
+normal! 034|
+lcd ~/Programming/nel/1
+wincmd w
+argglobal
+if bufexists(fnamemodify("term://~/Programming/nel/1//1946:/usr/bin/zsh", ":p")) | buffer term://~/Programming/nel/1//1946:/usr/bin/zsh | else | edit term://~/Programming/nel/1//1946:/usr/bin/zsh | endif
+if &buftype ==# 'terminal'
+  silent file term://~/Programming/nel/1//1946:/usr/bin/zsh
+endif
+balt ~/Programming/nel/1/parse.lua
+setlocal foldmethod=manual
+setlocal foldexpr=0
+setlocal foldmarker={{{,}}}
+setlocal foldignore=#
+setlocal foldlevel=0
+setlocal foldminlines=1
+setlocal foldnestmax=20
+setlocal foldenable
+let s:l = 947 - ((11 * winheight(0) + 6) / 12)
+if s:l < 1 | let s:l = 1 | endif
+keepjumps exe s:l
+normal! zt
+keepjumps 947
+normal! 040|
+lcd ~/Programming/nel/1
+wincmd w
+argglobal
+if bufexists(fnamemodify("~/Programming/nel/1/main.lua", ":p")) | buffer ~/Programming/nel/1/main.lua | else | edit ~/Programming/nel/1/main.lua | endif
+if &buftype ==# 'terminal'
+  silent file ~/Programming/nel/1/main.lua
+endif
+balt ~/Programming/nel/1/helper.lua
+setlocal foldmethod=manual
+setlocal foldexpr=v:lua.vim.treesitter.foldexpr()
+setlocal foldmarker={{{,}}}
+setlocal foldignore=#
+setlocal foldlevel=0
+setlocal foldminlines=1
+setlocal foldnestmax=20
+setlocal foldenable
+silent! normal! zE
+let &fdl = &fdl
+let s:l = 178 - ((21 * winheight(0) + 12) / 24)
+if s:l < 1 | let s:l = 1 | endif
+keepjumps exe s:l
+normal! zt
+keepjumps 178
+normal! 012|
+lcd ~/Programming/nel/1
+wincmd w
+argglobal
+if bufexists(fnamemodify("~/Programming/nel/1/test.nel", ":p")) | buffer ~/Programming/nel/1/test.nel | else | edit ~/Programming/nel/1/test.nel | endif
+if &buftype ==# 'terminal'
+  silent file ~/Programming/nel/1/test.nel
+endif
+balt ~/Programming/nel/1/main.lua
+setlocal foldmethod=manual
+setlocal foldexpr=0
+setlocal foldmarker={{{,}}}
+setlocal foldignore=#
+setlocal foldlevel=0
+setlocal foldminlines=1
+setlocal foldnestmax=20
+setlocal foldenable
+silent! normal! zE
+let &fdl = &fdl
+let s:l = 5 - ((4 * winheight(0) + 6) / 12)
+if s:l < 1 | let s:l = 1 | endif
+keepjumps exe s:l
+normal! zt
+keepjumps 5
+normal! 0
+lcd ~/Programming/nel/1
+wincmd w
+3wincmd w
+exe '1resize ' . ((&lines * 24 + 19) / 39)
+exe 'vert 1resize ' . ((&columns * 60 + 90) / 181)
+exe '2resize ' . ((&lines * 24 + 19) / 39)
+exe 'vert 2resize ' . ((&columns * 60 + 90) / 181)
+exe '3resize ' . ((&lines * 12 + 19) / 39)
+exe 'vert 3resize ' . ((&columns * 121 + 90) / 181)
+exe '4resize ' . ((&lines * 24 + 19) / 39)
+exe 'vert 4resize ' . ((&columns * 59 + 90) / 181)
+exe '5resize ' . ((&lines * 12 + 19) / 39)
+exe 'vert 5resize ' . ((&columns * 59 + 90) / 181)
+tabnext 1
+if exists('s:wipebuf') && len(win_findbuf(s:wipebuf)) == 0 && getbufvar(s:wipebuf, '&buftype') isnot# 'terminal'
+  silent exe 'bwipe ' . s:wipebuf
+endif
+unlet! s:wipebuf
+set winheight=1 winwidth=20
+let &shortmess = s:shortmess_save
+let &winminheight = s:save_winminheight
+let &winminwidth = s:save_winminwidth
+let s:sx = expand("<sfile>:p:r")."x.vim"
+if filereadable(s:sx)
+  exe "source " . fnameescape(s:sx)
+endif
+let &g:so = s:so_save | let &g:siso = s:siso_save
+set hlsearch
+doautoall SessionLoadPost
+unlet SessionLoad
+" vim: set ft=vim :
diff --git a/test.nel b/test.nel
index 35cbe85..c2156ab 100644
--- a/test.nel
+++ b/test.nel
@@ -1,8 +1,5 @@
 do {
-  let (dog);
-  print (get (dog));
-  set (dog) to (text (woof!));
-  print (get (dog));
-  if (true) then (print "true after"));
-  if (false) then (print "false!");
+  print "large balls";
+  define (say (text)) as (print (text));
+  say "shit";
 }