diff --git a/include/minimize.hpp b/include/minimize.hpp
index e5b4188..114da7e 100644
--- a/include/minimize.hpp
+++ b/include/minimize.hpp
@@ -6,29 +6,6 @@
 #include <regex>
 #include <string>
 
-typedef std::map<std::string,uint32_t> countmap_t;
-
-extern std::regex re_var_exclude;
-extern std::regex re_fct_exclude;
-
-extern const std::regex regex_null;
-
-#define RESERVED_VARIABLES "HOME", "PATH", "SHELL", "PWD", "OPTIND", "OPTARG"
-
-void require_rescan_all();
-void require_rescan_var();
-void require_rescan_fct();
-void require_rescan_cmd();
-
-std::regex var_exclude_regex(std::string const& in, bool include_reserved);
-std::regex fct_exclude_regex(std::string const& in);
-
-void list_vars(_obj* in, std::regex const& exclude);
-void list_var_defs(_obj* in, std::regex const& exclude);
-void list_var_calls(_obj* in, std::regex const& exclude);
-void list_fcts(_obj* in, std::regex const& exclude);
-void list_cmds(_obj* in, std::regex const& exclude);
-
 void minimize_var(_obj* in, std::regex const& exclude);
 void minimize_fct(_obj* in, std::regex const& exclude);
 
diff --git a/include/parse.hpp b/include/parse.hpp
index b13b979..de5f722 100644
--- a/include/parse.hpp
+++ b/include/parse.hpp
@@ -21,10 +21,6 @@
 
 #define SPECIAL_VARS "!#*@$?"
 
-inline bool is_num(char c) { return (c >= '0' && c <= '9'); }
-inline bool is_alpha(char c) { return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'); }
-inline bool is_alphanum(char c) { return is_alpha(c) || is_num(c); }
-
 std::string import_file(std::string const& path);
 
 shmain* parse_text(const char* in, uint32_t size, std::string const& filename="");
diff --git a/include/processing.hpp b/include/processing.hpp
new file mode 100644
index 0000000..84ba12b
--- /dev/null
+++ b/include/processing.hpp
@@ -0,0 +1,70 @@
+#ifndef PROCESSING_HPP
+#define PROCESSING_HPP
+
+#include <regex>
+#include <string>
+#include <set>
+#include <map>
+
+#include "struc.hpp"
+
+// constants
+#define RESERVED_VARIABLES "HOME", "PATH", "SHELL", "PWD", "OPTIND", "OPTARG"
+
+// types
+typedef std::map<std::string,uint32_t> countmap_t;
+typedef std::map<std::string,std::string> strmap_t;
+typedef std::set<std::string> set_t;
+
+// regexes
+extern std::regex re_var_exclude;
+extern std::regex re_fct_exclude;
+extern const std::regex regex_null;
+
+// Object maps (optimizations)
+extern countmap_t m_vars, m_vardefs, m_varcalls;
+extern countmap_t m_fcts, m_cmds;
+extern set_t m_excluded_var, m_excluded_fct, m_excluded_cmd;
+
+extern bool b_gotvar, b_gotfct, b_gotcmd;
+
+/** map get functions (optimizations) **/
+
+// rescans
+void require_rescan_all();
+void require_rescan_var();
+void require_rescan_fct();
+void require_rescan_cmd();
+
+// get objects
+void varmap_get(_obj* in, std::regex const& exclude);
+void fctmap_get(_obj* in, std::regex const& exclude);
+void cmdmap_get(_obj* in, std::regex const& exclude);
+
+/** functions **/
+
+// gen regexes
+std::regex var_exclude_regex(std::string const& in, bool include_reserved);
+std::regex fct_exclude_regex(std::string const& in);
+
+// varnames
+bool is_varname(std::string const& in);
+std::string get_varname(std::string const& in);
+std::string get_varname(arg* in);
+
+// list objects
+void list_map(countmap_t const& map);
+void list_vars(_obj* in, std::regex const& exclude);
+void list_var_defs(_obj* in, std::regex const& exclude);
+void list_var_calls(_obj* in, std::regex const& exclude);
+void list_fcts(_obj* in, std::regex const& exclude);
+void list_cmds(_obj* in, std::regex const& exclude);
+
+// recursives
+bool r_get_var(_obj* in, countmap_t* defmap, countmap_t* callmap);
+bool r_get_cmd(_obj* in, countmap_t* all_cmds);
+bool r_get_fct(_obj* in, countmap_t* fct_map);
+bool r_delete_fct(_obj* in, set_t* fcts);
+bool r_delete_var(_obj* in, set_t* vars);
+
+#endif //PROCESSING_HPP
diff --git a/include/util.hpp b/include/util.hpp
index 59cc11e..0877205 100644
--- a/include/util.hpp
+++ b/include/util.hpp
@@ -28,6 +28,10 @@ std::vector<std::string> split(std::string const& in, char c);
 
 std::string escape_str(std::string const& in);
 
+inline bool is_num(char c) { return (c >= '0' && c <= '9'); }
+inline bool is_alpha(char c) { return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'); }
+inline bool is_alphanum(char c) { return is_alpha(c) || is_num(c); }
+
 template<typename ... Args>
 std::string strf( const std::string& format, Args ... args )
 {
diff --git a/src/main.cpp b/src/main.cpp
index ae5c0bf..e4b5290 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -14,6 +14,7 @@
 #include "recursive.hpp"
 #include "minimize.hpp"
 #include "resolve.hpp"
+#include "processing.hpp"
 
 #include "version.h"
 #include "g_version.h"
diff --git a/src/minimize.cpp b/src/minimize.cpp
index 109686b..e16015e 100644
--- a/src/minimize.cpp
+++ b/src/minimize.cpp
@@ -1,163 +1,9 @@
 #include "minimize.hpp"
 
-#include <map>
-#include <regex>
-#include <cmath>
-
 #include "recursive.hpp"
-#include "parse.hpp"
+#include "processing.hpp"
 #include "util.hpp"
 
-std::regex re_var_exclude;
-std::regex re_fct_exclude;
-
-const std::regex regex_null;
-
-countmap_t m_vars, m_vardefs, m_varcalls;
-countmap_t m_fcts, m_cmds;
-std::set<std::string> m_excluded_var, m_excluded_fct, m_excluded_cmd;
-
-bool b_gotvar=false, b_gotfct=false, b_gotcmd=false;
-
-// requires
-
-void require_rescan_var()
-{
-  b_gotvar = false;
-  m_vars.clear();
-  m_vardefs.clear();
-  m_varcalls.clear();
-  m_excluded_var.clear();
-}
-void require_rescan_fct()
-{
-  b_gotcmd = false;
-  m_fcts.clear();
-  m_excluded_fct.clear();
-}
-void require_rescan_cmd()
-{
-  b_gotfct = false;
-  m_cmds.clear();
-  m_excluded_cmd.clear();
-}
-
-void require_rescan_all()
-{
-  require_rescan_var();
-  require_rescan_fct();
-  require_rescan_cmd();
-}
-
-// tools
-
-countmap_t combine_maps(countmap_t const& a, countmap_t const& b)
-{
-  countmap_t ret;
-  for(auto it: a)
-  {
-    if(!ret.insert( it ).second)
-      ret[it.first] += it.second;
-  }
-  for(auto it: b)
-  {
-    if(!ret.insert( it ).second)
-      ret[it.first] += it.second;
-  }
-  return ret;
-}
-
-void list_map(countmap_t const& map)
-{
-  uint32_t max=0;
-  for(auto it: map)
-    if(it.second > max)
-      max=it.second;
-  for(auto it: map)
-    printf("%*d %s\n", (uint32_t)log10(max)+1, it.second, it.first.c_str());
-}
-
-std::vector<std::string> get_list(std::string const& in)
-{
-  return split(in, ", \t\n");
-}
-
-std::regex gen_regex_from_list(std::vector<std::string> const& in)
-{
-  std::string re;
-  for(auto it: in)
-    re += '('+it+")|";
-  if(re.size()>0)
-    re.pop_back();
-  return std::regex(re);
-}
-
-std::vector<std::string> gen_var_excludes(std::string const& in, bool include_reserved)
-{
-  std::vector<std::string> ret;
-  if(include_reserved)
-  {
-    ret = {RESERVED_VARIABLES, strf("[0-9%s]", SPECIAL_VARS)};
-  }
-  auto t = get_list(in);
-  ret.insert(ret.end(), t.begin(), t.end());
-  return ret;
-}
-
-std::regex var_exclude_regex(std::string const& in, bool include_reserved)
-{
-  return gen_regex_from_list(gen_var_excludes(in, include_reserved));
-}
-std::regex fct_exclude_regex(std::string const& in)
-{
-  return gen_regex_from_list(get_list(in));
-}
-
-bool is_varname(std::string const& in)
-{
-  if(in.size() <= 0 || !(is_alpha(in[0]) || in[0]== '_') )
-    return false;
-  uint32_t i=1;
-  while(i<in.size() && (is_alphanum(in[i]) || in[i] == '_'))
-  {
-    i++;
-  }
-  if(i<in.size() && in[i]!='=')
-    return false;
-  return true;
-}
-
-// object extensions //
-
-std::string get_varname(std::string const& in)
-{
-  size_t i=in.find('=');
-  if(i!=std::string::npos)
-    return in.substr(0, i);
-  else
-    return in;
-}
-
-std::string get_varname(arg* in)
-{
-  if(in->sa.size() < 1 || in->sa[0]->type != _obj::subarg_string)
-    return "";
-  std::string str = in->sa[0]->generate(0);
-  if(in->sa.size() >= 1 && is_varname(str))
-    return get_varname(str);
-  return "";
-}
-
-bool cmd_is_argvar(std::string const& in)
-{
-  return in == "export" || in == "unset" || in == "local" || in == "read";
-}
-
-bool cmd::is_argvar()
-{
-  return cmd_is_argvar(this->firstarg_string());
-}
-
 std::vector<subarg*> cmd::subarg_vars()
 {
   std::vector<subarg*> ret;
@@ -181,40 +27,24 @@ std::vector<subarg*> cmd::subarg_vars()
 
 /** RECURSIVES **/
 
-// GET //
-
-bool r_get_var(_obj* in, countmap_t* defmap, countmap_t* callmap)
+bool r_replace_fct(_obj* in, strmap_t* fctmap)
 {
   switch(in->type)
   {
-    case _obj::subarg_variable: {
-      variable_subarg* t = dynamic_cast<variable_subarg*>(in);
-      if(!callmap->insert( std::make_pair(t->varname, 1) ).second)
-        (*callmap)[t->varname]++;
-    }; break;
-    case _obj::subarg_manipulation: {
-      manipulation_subarg* t = dynamic_cast<manipulation_subarg*>(in);
-      if(!callmap->insert( std::make_pair(t->varname, 1) ).second)
-        (*callmap)[t->varname]++;
-    }; break;
-    case _obj::block_for: {
-      for_block* t = dynamic_cast<for_block*>(in);
-      if(!defmap->insert( std::make_pair(t->varname, 1) ).second)
-        (*defmap)[t->varname]++;
+    case _obj::block_function: {
+      function* t = dynamic_cast<function*>(in);
+      auto el=fctmap->find(t->name);
+      if(el!=fctmap->end())
+        t->name = el->second;
     }; break;
     case _obj::block_cmd: {
       cmd* t = dynamic_cast<cmd*>(in);
-      for(auto it: t->var_assigns)
-        if(!defmap->insert( std::make_pair(it.first, 1) ).second)
-          (*defmap)[it.first]++;
-      if(t->is_argvar())
+      std::string cmdname = t->firstarg_string();
+      auto el=fctmap->find(cmdname);
+      if(el!=fctmap->end())
       {
-        for(uint32_t i=1; i<t->args->size(); i++)
-        {
-          std::string varname=get_varname(t->args->args[i]);
-          if( varname != "" && !defmap->insert( std::make_pair(varname, 1) ).second )
-            (*defmap)[varname]++;
-        }
+        delete t->args->args[0];
+        t->args->args[0] = new arg(el->second);
       }
     }; break;
     default: break;
@@ -222,38 +52,7 @@ bool r_get_var(_obj* in, countmap_t* defmap, countmap_t* callmap)
   return true;
 }
 
-bool r_get_cmd(_obj* in, countmap_t* all_cmds)
-{
-  switch(in->type)
-  {
-    case _obj::block_cmd: {
-      cmd* t = dynamic_cast<cmd*>(in);
-      std::string cmdname = t->firstarg_string();
-      if(cmdname != "" && !all_cmds->insert( std::make_pair(cmdname, 1) ).second)
-        (*all_cmds)[cmdname]++;
-    }; break;
-    default: break;
-  }
-  return true;
-}
-
-bool r_get_fct(_obj* in, countmap_t* fct_map)
-{
-  switch(in->type)
-  {
-    case _obj::block_function: {
-      function* t = dynamic_cast<function*>(in);
-      if(!fct_map->insert( std::make_pair(t->name, 1) ).second)
-        (*fct_map)[t->name]++;
-    }; break;
-    default: break;
-  }
-  return true;
-}
-
-// REPLACE //
-
-bool r_replace_var(_obj* in, std::map<std::string,std::string>* varmap)
+bool r_replace_var(_obj* in, strmap_t* varmap)
 {
   switch(in->type)
   {
@@ -302,115 +101,6 @@ bool r_replace_var(_obj* in, std::map<std::string,std::string>* varmap)
   return true;
 }
 
-bool r_replace_fct(_obj* in, std::map<std::string,std::string>* fctmap)
-{
-  switch(in->type)
-  {
-    case _obj::block_function: {
-      function* t = dynamic_cast<function*>(in);
-      auto el=fctmap->find(t->name);
-      if(el!=fctmap->end())
-        t->name = el->second;
-    }; break;
-    case _obj::block_cmd: {
-      cmd* t = dynamic_cast<cmd*>(in);
-      std::string cmdname = t->firstarg_string();
-      auto el=fctmap->find(cmdname);
-      if(el!=fctmap->end())
-      {
-        delete t->args->args[0];
-        t->args->args[0] = new arg(el->second);
-      }
-    }; break;
-    default: break;
-  }
-  return true;
-}
-
-// DELETE //
-
-bool r_delete_fct(_obj* in, std::set<std::string>* fcts)
-{
-  switch(in->type)
-  {
-    case _obj::_list: {
-      list* t = dynamic_cast<list*>(in);
-      for(uint32_t i=0; i<t->cls.size(); i++)
-      {
-        block* tb = t->cls[i]->first_block();
-        if(tb != nullptr && tb->type == _obj::block_function)
-        {
-          function* fc = dynamic_cast<function*>(tb);
-          if(fcts->find(fc->name)!=fcts->end())
-          {
-            delete t->cls[i];
-            t->cls.erase(t->cls.begin()+i);
-            i--;
-          }
-        }
-      }
-    }
-    default: break;
-  }
-  return true;
-}
-
-bool r_delete_var(_obj* in, std::set<std::string>* vars)
-{
-  switch(in->type)
-  {
-    case _obj::_list: {
-      list* t = dynamic_cast<list*>(in);
-      for(uint32_t i=0; i<t->cls.size(); i++)
-      {
-        block* tb = t->cls[i]->first_block();
-        bool to_delete=false;
-        if(tb != nullptr && tb->type == _obj::block_cmd)
-        {
-          cmd* c = dynamic_cast<cmd*>(tb);
-
-          for(uint32_t j=0; j<c->var_assigns.size(); j++)
-          {
-            if( vars->find(c->var_assigns[j].first) != vars->end() )
-            {
-              delete c->var_assigns[j].second;
-              c->var_assigns.erase(c->var_assigns.begin()+j);
-              j--;
-            }
-          }
-
-          if(c->is_argvar())
-          {
-            for(uint32_t j=1; j<c->args->size(); j++)
-            {
-              std::string varname=get_varname(c->args->args[j]);
-              if( varname != "" && vars->find( varname ) != vars->end() )
-              {
-                delete c->args->args[j];
-                c->args->args.erase(c->args->args.begin()+j);
-                j--;
-              }
-            }
-            if(c->args->size()<=1)
-              to_delete=true;
-          }
-          if(c->var_assigns.size()<=0 && c->arglist_size()<=0)
-            to_delete=true;
-
-        }
-        if(to_delete)
-        {
-          delete t->cls[i];
-          t->cls.erase(t->cls.begin()+i);
-          i--;
-        }
-      }
-    }
-    default: break;
-  }
-  return true;
-}
-
 /** NAME MINIMIZING **/
 
 char nchar(uint32_t n)
@@ -451,9 +141,11 @@ std::string minimal_name(uint32_t n)
   }
 }
 
-std::map<std::string,std::string> gen_minimal_map(countmap_t const& vars, std::set<std::string> excluded)
+// vars: input variables
+// excluded: excluded variables to make sure there is no collision
+strmap_t gen_minimal_map(countmap_t const& vars, set_t const& excluded)
 {
-  std::map<std::string,std::string> ret;
+  strmap_t ret;
   auto ordered = sort_by_value(vars);
   uint32_t n=0;
   for(std::pair<std::string,uint32_t> it: ordered)
@@ -468,46 +160,13 @@ std::map<std::string,std::string> gen_minimal_map(countmap_t const& vars, std::s
   return ret;
 }
 
-// map getters
-
-void varmap_get(_obj* in, std::regex const& exclude)
-{
-  if(!b_gotvar)
-  {
-    b_gotvar=true;
-    recurse(r_get_var, in, &m_vardefs, &m_varcalls);
-    m_vars = combine_maps(m_vardefs, m_varcalls);
-    m_excluded_var = prune_matching(m_vars, exclude);
-  }
-}
-
-void fctmap_get(_obj* in, std::regex const& exclude)
-{
-  if(!b_gotfct)
-  {
-    b_gotfct=true;
-    recurse(r_get_fct, in, &m_fcts);
-    m_excluded_fct = prune_matching(m_fcts, exclude);
-  }
-}
-
-void cmdmap_get(_obj* in, std::regex const& exclude)
-{
-  if(!b_gotcmd)
-  {
-    b_gotcmd=true;
-    recurse(r_get_cmd, in, &m_cmds);
-    m_excluded_fct = prune_matching(m_cmds, exclude);
-  }
-}
-
 // calls
 
 void minimize_var(_obj* in, std::regex const& exclude)
 {
   // countmap_t vars;
-  std::set<std::string> excluded;
-  std::map<std::string,std::string> varmap;
+  set_t excluded;
+  strmap_t varmap;
   // get vars
   varmap_get(in, exclude);
   // create mapping
@@ -520,8 +179,8 @@ void minimize_var(_obj* in, std::regex const& exclude)
 void minimize_fct(_obj* in, std::regex const& exclude)
 {
   // countmap_t fcts, cmdmap;
-  std::set<std::string> allcmds, excluded;
-  std::map<std::string,std::string> fctmap;
+  set_t allcmds, excluded;
+  strmap_t fctmap;
   // get fcts and cmds
   fctmap_get(in, exclude);
   cmdmap_get(in, regex_null);
@@ -538,7 +197,7 @@ void minimize_fct(_obj* in, std::regex const& exclude)
 
 bool delete_unused_fct(_obj* in, std::regex const& exclude)
 {
-  std::set<std::string> unused;
+  set_t unused;
   // get fcts and cmds
   fctmap_get(in, exclude);
   cmdmap_get(in, regex_null);
@@ -561,7 +220,7 @@ bool delete_unused_fct(_obj* in, std::regex const& exclude)
 
 bool delete_unused_var(_obj* in, std::regex const& exclude)
 {
-  std::set<std::string> unused;
+  set_t unused;
   // get fcts and cmds
   varmap_get(in, exclude);
   // find unused vars
@@ -584,34 +243,5 @@ bool delete_unused_var(_obj* in, std::regex const& exclude)
 void delete_unused(_obj* in, std::regex const& var_exclude, std::regex const& fct_exclude)
 {
   while(delete_unused_fct(in, fct_exclude) || delete_unused_var(in, var_exclude));
-}
-
-void list_vars(_obj* in, std::regex const& exclude)
-{
-  varmap_get(in, exclude);
-  list_map(m_vars);
-}
-
-void list_var_defs(_obj* in, std::regex const& exclude)
-{
-  varmap_get(in, exclude);
-  list_map(m_vardefs);
-}
-
-void list_var_calls(_obj* in, std::regex const& exclude)
-{
-  varmap_get(in, exclude);
-  list_map(m_varcalls);
-}
-
-void list_fcts(_obj* in, std::regex const& exclude)
-{
-  fctmap_get(in, exclude);
-  list_map(m_fcts);
-}
-
-void list_cmds(_obj* in, std::regex const& exclude)
-{
-  cmdmap_get(in, exclude);
-  list_map(m_cmds);
+  // keep deleting until both no function and no variables were deleted
 }
diff --git a/src/options.cpp b/src/options.cpp
index 889eed5..5cd5e61 100644
--- a/src/options.cpp
+++ b/src/options.cpp
@@ -1,6 +1,6 @@
 #include "options.hpp"
 
-#include "minimize.hpp"
+#include "processing.hpp"
 
 ztd::option_set options = gen_options();
 bool opt_minimize=false;
@@ -37,8 +37,8 @@ ztd::option_set gen_options()
       ztd::option("list-var-call",      false, "List all variables invoked in the script"),
       ztd::option("list-fct",           false, "List all functions defined in the script"),
       ztd::option("list-cmd",           false, "List all commands invoked in the script"),
-      // ztd::option("unset-var",          false, "Add 'unset' to all vars at the start of the script to avoid environment interference"),
-      ztd::option("remove-unused",      false, "Remove unused functions")
+      ztd::option("remove-unused",      false, "Remove unused functions and variables")
+      // ztd::option("unset-var",          false, "Add 'unset' to all vars at the start of the script to avoid environment interference")
   );
   return ret;
 }
diff --git a/src/processing.cpp b/src/processing.cpp
new file mode 100644
index 0000000..a4a1c0d
--- /dev/null
+++ b/src/processing.cpp
@@ -0,0 +1,384 @@
+#include "processing.hpp"
+
+#include <cmath>
+
+#include "recursive.hpp"
+#include "parse.hpp"
+#include "util.hpp"
+
+// Global regex
+
+std::regex re_var_exclude;
+std::regex re_fct_exclude;
+
+const std::regex regex_null;
+
+// Object maps
+
+countmap_t m_vars, m_vardefs, m_varcalls;
+countmap_t m_fcts, m_cmds;
+set_t m_excluded_var, m_excluded_fct, m_excluded_cmd;
+
+bool b_gotvar=false, b_gotfct=false, b_gotcmd=false;
+
+// requires
+
+void require_rescan_var()
+{
+  b_gotvar = false;
+  m_vars.clear();
+  m_vardefs.clear();
+  m_varcalls.clear();
+  m_excluded_var.clear();
+}
+void require_rescan_fct()
+{
+  b_gotcmd = false;
+  m_fcts.clear();
+  m_excluded_fct.clear();
+}
+void require_rescan_cmd()
+{
+  b_gotfct = false;
+  m_cmds.clear();
+  m_excluded_cmd.clear();
+}
+
+void require_rescan_all()
+{
+  require_rescan_var();
+  require_rescan_fct();
+  require_rescan_cmd();
+}
+
+/** TOOLS **/
+
+// type tools
+countmap_t combine_maps(countmap_t const& a, countmap_t const& b)
+{
+  countmap_t ret;
+  for(auto it: a)
+  {
+    if(!ret.insert( it ).second)
+      ret[it.first] += it.second;
+  }
+  for(auto it: b)
+  {
+    if(!ret.insert( it ).second)
+      ret[it.first] += it.second;
+  }
+  return ret;
+}
+
+void list_map(countmap_t const& map)
+{
+  uint32_t max=0;
+  for(auto it: map)
+    if(it.second > max)
+      max=it.second;
+  for(auto it: map)
+    printf("%*d %s\n", (uint32_t)log10(max)+1, it.second, it.first.c_str());
+}
+
+inline std::vector<std::string> get_list(std::string const& in)
+{
+  return split(in, ", \t\n");
+}
+
+std::regex gen_regex_from_list(std::vector<std::string> const& in)
+{
+  std::string re;
+  for(auto it: in)
+    re += '('+it+")|";
+  if(re.size()>0)
+    re.pop_back();
+  return std::regex(re);
+}
+
+std::vector<std::string> gen_var_excludes(std::string const& in, bool include_reserved)
+{
+  std::vector<std::string> ret;
+  if(include_reserved)
+  {
+    ret = {RESERVED_VARIABLES, strf("[0-9%s]", SPECIAL_VARS)};
+  }
+  auto t = get_list(in);
+  ret.insert(ret.end(), t.begin(), t.end());
+  return ret;
+}
+
+std::regex var_exclude_regex(std::string const& in, bool include_reserved)
+{
+  return gen_regex_from_list(gen_var_excludes(in, include_reserved));
+}
+std::regex fct_exclude_regex(std::string const& in)
+{
+  return gen_regex_from_list(get_list(in));
+}
+
+// Variable checks and extensions
+
+bool is_varname(std::string const& in)
+{
+  if(in.size() <= 0 || !(is_alpha(in[0]) || in[0]== '_') )
+    return false;
+  uint32_t i=1;
+  while(i<in.size() && (is_alphanum(in[i]) || in[i] == '_'))
+  {
+    i++;
+  }
+  if(i<in.size() && in[i]!='=')
+    return false;
+  return true;
+}
+
+std::string get_varname(std::string const& in)
+{
+  size_t i=in.find('=');
+  if(i!=std::string::npos)
+    return in.substr(0, i);
+  else
+    return in;
+}
+
+std::string get_varname(arg* in)
+{
+  if(in->sa.size() < 1 || in->sa[0]->type != _obj::subarg_string)
+    return "";
+  std::string str = in->sa[0]->generate(0);
+  if(in->sa.size() >= 1 && is_varname(str))
+    return get_varname(str);
+  return "";
+}
+
+bool cmd_is_argvar(std::string const& in)
+{
+  return in == "export" || in == "unset" || in == "local" || in == "read";
+}
+
+bool cmd::is_argvar()
+{
+  return cmd_is_argvar(this->firstarg_string());
+}
+
+/** GETTERS **/
+
+void varmap_get(_obj* in, std::regex const& exclude)
+{
+  if(!b_gotvar)
+  {
+    b_gotvar=true;
+    recurse(r_get_var, in, &m_vardefs, &m_varcalls);
+    m_vars = combine_maps(m_vardefs, m_varcalls);
+    m_excluded_var = prune_matching(m_vars, exclude);
+  }
+}
+
+void fctmap_get(_obj* in, std::regex const& exclude)
+{
+  if(!b_gotfct)
+  {
+    b_gotfct=true;
+    recurse(r_get_fct, in, &m_fcts);
+    m_excluded_fct = prune_matching(m_fcts, exclude);
+  }
+}
+
+void cmdmap_get(_obj* in, std::regex const& exclude)
+{
+  if(!b_gotcmd)
+  {
+    b_gotcmd=true;
+    recurse(r_get_cmd, in, &m_cmds);
+    m_excluded_fct = prune_matching(m_cmds, exclude);
+  }
+}
+
+/** OUTPUT **/
+
+
+void list_vars(_obj* in, std::regex const& exclude)
+{
+  varmap_get(in, exclude);
+  list_map(m_vars);
+}
+
+void list_var_defs(_obj* in, std::regex const& exclude)
+{
+  varmap_get(in, exclude);
+  list_map(m_vardefs);
+}
+
+void list_var_calls(_obj* in, std::regex const& exclude)
+{
+  varmap_get(in, exclude);
+  list_map(m_varcalls);
+}
+
+void list_fcts(_obj* in, std::regex const& exclude)
+{
+  fctmap_get(in, exclude);
+  list_map(m_fcts);
+}
+
+void list_cmds(_obj* in, std::regex const& exclude)
+{
+  cmdmap_get(in, exclude);
+  list_map(m_cmds);
+}
+
+/** RECURSIVES **/
+
+// GET //
+
+bool r_get_var(_obj* in, countmap_t* defmap, countmap_t* callmap)
+{
+  switch(in->type)
+  {
+    case _obj::subarg_variable: {
+      variable_subarg* t = dynamic_cast<variable_subarg*>(in);
+      if(!callmap->insert( std::make_pair(t->varname, 1) ).second)
+        (*callmap)[t->varname]++;
+    }; break;
+    case _obj::subarg_manipulation: {
+      manipulation_subarg* t = dynamic_cast<manipulation_subarg*>(in);
+      if(!callmap->insert( std::make_pair(t->varname, 1) ).second)
+        (*callmap)[t->varname]++;
+    }; break;
+    case _obj::block_for: {
+      for_block* t = dynamic_cast<for_block*>(in);
+      if(!defmap->insert( std::make_pair(t->varname, 1) ).second)
+        (*defmap)[t->varname]++;
+    }; break;
+    case _obj::block_cmd: {
+      cmd* t = dynamic_cast<cmd*>(in);
+      for(auto it: t->var_assigns)
+        if(!defmap->insert( std::make_pair(it.first, 1) ).second)
+          (*defmap)[it.first]++;
+      if(t->is_argvar())
+      {
+        for(uint32_t i=1; i<t->args->size(); i++)
+        {
+          std::string varname=get_varname(t->args->args[i]);
+          if( varname != "" && !defmap->insert( std::make_pair(varname, 1) ).second )
+            (*defmap)[varname]++;
+        }
+      }
+    }; break;
+    default: break;
+  }
+  return true;
+}
+
+bool r_get_cmd(_obj* in, countmap_t* all_cmds)
+{
+  switch(in->type)
+  {
+    case _obj::block_cmd: {
+      cmd* t = dynamic_cast<cmd*>(in);
+      std::string cmdname = t->firstarg_string();
+      if(cmdname != "" && !all_cmds->insert( std::make_pair(cmdname, 1) ).second)
+        (*all_cmds)[cmdname]++;
+    }; break;
+    default: break;
+  }
+  return true;
+}
+
+bool r_get_fct(_obj* in, countmap_t* fct_map)
+{
+  switch(in->type)
+  {
+    case _obj::block_function: {
+      function* t = dynamic_cast<function*>(in);
+      if(!fct_map->insert( std::make_pair(t->name, 1) ).second)
+        (*fct_map)[t->name]++;
+    }; break;
+    default: break;
+  }
+  return true;
+}
+
+// DELETE //
+
+bool r_delete_fct(_obj* in, set_t* fcts)
+{
+  switch(in->type)
+  {
+    case _obj::_list: {
+      list* t = dynamic_cast<list*>(in);
+      for(uint32_t i=0; i<t->cls.size(); i++)
+      {
+        block* tb = t->cls[i]->first_block();
+        if(tb != nullptr && tb->type == _obj::block_function)
+        {
+          function* fc = dynamic_cast<function*>(tb);
+          if(fcts->find(fc->name)!=fcts->end())
+          {
+            delete t->cls[i];
+            t->cls.erase(t->cls.begin()+i);
+            i--;
+          }
+        }
+      }
+    }
+    default: break;
+  }
+  return true;
+}
+
+bool r_delete_var(_obj* in, set_t* vars)
+{
+  switch(in->type)
+  {
+    case _obj::_list: {
+      list* t = dynamic_cast<list*>(in);
+      for(uint32_t i=0; i<t->cls.size(); i++)
+      {
+        block* tb = t->cls[i]->first_block();
+        bool to_delete=false;
+        if(tb != nullptr && tb->type == _obj::block_cmd)
+        {
+          cmd* c = dynamic_cast<cmd*>(tb);
+
+          for(uint32_t j=0; j<c->var_assigns.size(); j++)
+          {
+            if( vars->find(c->var_assigns[j].first) != vars->end() )
+            {
+              delete c->var_assigns[j].second;
+              c->var_assigns.erase(c->var_assigns.begin()+j);
+              j--;
+            }
+          }
+
+          if(c->is_argvar())
+          {
+            for(uint32_t j=1; j<c->args->size(); j++)
+            {
+              std::string varname=get_varname(c->args->args[j]);
+              if( varname != "" && vars->find( varname ) != vars->end() )
+              {
+                delete c->args->args[j];
+                c->args->args.erase(c->args->args.begin()+j);
+                j--;
+              }
+            }
+            if(c->args->size()<=1)
+              to_delete=true;
+          }
+          if(c->var_assigns.size()<=0 && c->arglist_size()<=0)
+            to_delete=true;
+
+        }
+        if(to_delete)
+        {
+          delete t->cls[i];
+          t->cls.erase(t->cls.begin()+i);
+          i--;
+        }
+      }
+    }
+    default: break;
+  }
+  return true;
+}