diff --git a/main.cpp b/main.cpp
index 29eccb8..d6dd061 100644
--- a/main.cpp
+++ b/main.cpp
@@ -7,16 +7,17 @@
 
 #include <sys/mman.h> 	// for mmap()
 #include <sys/stat.h>	// for fstat()
-#include <fcntl.h>		// for open()
+#include <fcntl.h>		// for open(), O_RDONLY
 #include <unistd.h>		// for close()
 #include <errno.h>		// for perror()
 
 #include <iostream>
+#include <fstream>
 #include <string>
-#include <cstring>
 #include <vector>
 #include <map>
 #include <set>
+#include <functional>
 
 #include "fs.hpp"
 #include "memory_string.hpp"
@@ -60,8 +61,6 @@ std::string readTill(iterator &start, const iterator &end, std::function<bool(co
 
 template <typename iterator>
 std::string readBrackets(iterator &current, const iterator &end, const char * brackets) {
-//	auto current = begin;
-
 	if (current == end || *current != brackets[0]) {
 		std::cout << brackets[0] << "!=" << *current;
 		return std::string();
@@ -122,24 +121,9 @@ std::string InputExtractor::macroExpand(const std::string &input) {
 	return result;
 }
 
-#include <functional>
+
 typedef std::map<std::string, std::function<void(InputExtractor::List&, std::string)>> CommandList;
 
-#include <unistd.h>
-
-
-#include <fstream>
-
-bool Exists(std::string path) {
-	std::ifstream file(path);
-	if (!file) {
-		return false;
-	}
-
-	file.close();
-	return true;
-}
-
 InputExtractor::List InputExtractor::Include(Path::Path path) {
 	path = Path::Clean(path);
 	List list;
@@ -178,11 +162,13 @@ InputExtractor::List InputExtractor::Include(Path::Path path) {
 		return list;
 	}
 
-//	Substring str((const char *)memptr, (const char*)memptr + fileinfo.st_size);
+	// create iteratable memory object
 	MemoryString file((char*)memptr, fileinfo.st_size);
 
 	std::string basedir = Path::Dir(path);
-	list = (*this)(basedir, file); // follow include
+
+	// evaluate memory region (aka the file)
+	list = (*this)(basedir, file);
 
 	// cleanup
 	munmap(memptr, fileinfo.st_size);
@@ -192,6 +178,8 @@ InputExtractor::List InputExtractor::Include(Path::Path path) {
 	cout << path << "done" << endl;
 }
 
+// make a relative filepath absolute using the root filename
+// and/or the process working directory
 Path::Path fixFilename(const Path::Path &file, const Path::Path &root) {
 	Path::Path temp(file);
 
@@ -208,7 +196,7 @@ Path::Path fixFilename(const Path::Path &file, const Path::Path &root) {
 	return Path::Clean(temp);
 }
 
-
+// evaluate a tex file searching for input statements
 InputExtractor::List InputExtractor::operator()(const Path::Path &file, const MemoryString &str){
 	List result;
 	CommandList IncludeCommands;
@@ -324,72 +312,6 @@ int main(int argc, char ** args) {
 		}
 
 		cout << "done" << endl;
-
-		/*
-		char * filename = args[argc-1];
-		cout << "opening " << filename << "...";
-
-		// try to open file
-		fd = open(filename, O_RDONLY);
-		if (fd == -1) {
-			perror("could not open input file");
-			continue;
-		}
-
-		fstat(fd, &filestat);
-		//cout << "file size: " << filestat.st_size << endl;
-
-		// try to mmap file
-		void * memory_area = mmap(NULL, filestat.st_size, PROT_READ, MAP_SHARED, fd, 0);
-		if (memory_area == nullptr) {
-			perror("could not mmap the input");
-			continue;
-		}
-
-		cout << "start parsing" << endl;
-
-		MemoryString file((char*)memory_area, filestat.st_size);
-
-		try {
-			InputExtractor::List list = InputExtractor()(file);
-
-			Path::Path outfilename = Path::Basename(Path::Path(filename)) + ".d";
-
-			cout << "writing makedeps file to " << outfilename << "..." << endl;
-
-			// write in makefile style
-			std::ofstream output(outfilename);
-			if (!output) {
-				std::cout << "could not create output file" << std::endl;
-			} else {
-				output << filename << ": ";
-
-				for (auto it = list.begin(); it != list.end(); it++) {
-					if (Path::isRelative(*it))  {
-						if (Path::isRelative(filename)) {
-							*it = Path::Join(fs::cwd(), filename, *it);
-						} else {
-							*it = Path::Join(Path::Path(filename), *it);
-						}
-					}
-
-					cout << "depends: " << *it << endl;
-					output << '\t' << *it << "\t\\\n";
-				}
-				output << endl;
-			}
-
-			cout << filename << done;
-
-		} catch(InputExtractor::Exception &e) {
-			cout << e.what() << endl;
-		}
-
-		// cleanup
-		munmap(memory_area, filestat.st_size);
-		close(fd);
-
-		*/
 	}
 
 }
diff --git a/test.tex b/test.tex
index e49bd16..325507e 100644
--- a/test.tex
+++ b/test.tex
@@ -1,6 +1,7 @@
 \documentclass{article}
 \usepackage[ngerman]{babel}
 
+\def\test{}
 
 \author{Julian Daube}
 \title{Ein Test}