diff --git a/src/main.c b/src/main.c
index b8a610b..3a6b8e6 100644
--- a/src/main.c
+++ b/src/main.c
@@ -2,6 +2,7 @@
 #include <stdlib.h>
 
 #include "parser.h"
+#include "syntax.h"
 #include "printtree.h"
 
 
diff --git a/src/parser.c b/src/parser.c
index b8f8ad8..d6e56bd 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -3,78 +3,9 @@
 #include <stdbool.h>
 #include <ctype.h>
 
-#include "parser.h"
+#include "syntax.h"
 #include "extstring.h"
 
-struct SyntaxElement* se_create(void) {
-	struct SyntaxElement* syntaxelement = malloc(sizeof(struct SyntaxElement));
-	syntaxelement->type = NONE;
-	syntaxelement->content = NULL;
-	syntaxelement->next = NULL;
-	syntaxelement->top = NULL;
-	return syntaxelement;
-
-}
-
-struct SyntaxElement* se_bottom(struct SyntaxElement* syntaxelement) {
-	syntaxelement->content = se_create();
-	((struct SyntaxElement*)syntaxelement->content)->top = syntaxelement;
-	return ((struct SyntaxElement*)syntaxelement->content);
-}
-
-struct SyntaxElement* se_next(struct SyntaxElement* syntaxelement) {
-	syntaxelement->next = se_create();
-	syntaxelement->next->top = syntaxelement->top;
-	return syntaxelement->next;
-}
-
-void se_free(struct SyntaxElement* syntaxtree) {
-	switch (syntaxtree->type) {
-		case NONE:
-			free(syntaxtree);
-			return;
-		case TREE:
-		case TOPTREE:
-			if (syntaxtree->content != NULL) {
-				se_free((struct SyntaxElement*)syntaxtree->content);
-			}
-			break;
-		default:
-			free(syntaxtree->content);
-			break;
-	}
-	if (syntaxtree->next != NULL) {
-		se_free(syntaxtree->next);
-	}
-	free(syntaxtree);
-}
-
-// Remove NONEs from the syntax tree.
-void se_clean(struct SyntaxElement* syntaxtree) {
-	if (syntaxtree->next != NULL) {
-		switch (syntaxtree->next->type) {
-			case NONE:
-				free(syntaxtree->next);
-				syntaxtree->next = NULL;
-				break;
-			default:
-				se_clean(syntaxtree->next);
-				break;
-		}
-	}
-	if (syntaxtree->content != NULL && (syntaxtree->type == TOPTREE || syntaxtree->type == TREE)) {
-		switch (((struct SyntaxElement*)syntaxtree->content)->type) {
-			case NONE:
-				free(syntaxtree->content);
-				syntaxtree->content = NULL;
-				break;
-			default:
-				se_clean((struct SyntaxElement*)syntaxtree->content);
-				break;
-		}
-	}
-}
-
 struct SyntaxElement* parse(FILE* file) {
 	struct SyntaxElement* syntaxtree = se_create();
 	struct SyntaxElement* syntaxtreestart = syntaxtree;
diff --git a/src/parser.h b/src/parser.h
index 55cb73f..284b659 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -1,27 +1,3 @@
 #include <stdio.h>
 
-#ifndef PARSER_H
-#define PARSER_H
-struct SyntaxElement* se_init(void);
-struct SyntaxElement* se_bottom(struct SyntaxElement* syntaxelement);
-struct SyntaxElement* se_next(struct SyntaxElement* syntaxelement);
-void se_free(struct SyntaxElement* syntaxtree);
-
-enum SyntaxElementType {
-	TOPTREE,
-	TREE,
-	TOKEN,
-	STRING,
-	NUMBER,
-	NONE
-};
-
-struct SyntaxElement {
-	enum SyntaxElementType type;
-	void* content;
-	struct SyntaxElement* next;
-	struct SyntaxElement* top;
-};
-
 struct SyntaxElement* parse(FILE* file);
-#endif
diff --git a/src/printtree.c b/src/printtree.c
index 4bf73c3..206e467 100644
--- a/src/printtree.c
+++ b/src/printtree.c
@@ -1,7 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include "parser.h"
+#include "syntax.h"
 
 void printtree(struct SyntaxElement* syntaxtree, int depth) {
 	if (syntaxtree == NULL)
diff --git a/src/syntax.c b/src/syntax.c
new file mode 100644
index 0000000..ca83d25
--- /dev/null
+++ b/src/syntax.c
@@ -0,0 +1,73 @@
+#include <stdlib.h>
+
+#include "syntax.h"
+
+struct SyntaxElement* se_create(void) {
+	struct SyntaxElement* syntaxelement = malloc(sizeof(struct SyntaxElement));
+	syntaxelement->type = NONE;
+	syntaxelement->content = NULL;
+	syntaxelement->next = NULL;
+	syntaxelement->top = NULL;
+	return syntaxelement;
+
+}
+
+struct SyntaxElement* se_bottom(struct SyntaxElement* syntaxelement) {
+	syntaxelement->content = se_create();
+	((struct SyntaxElement*)syntaxelement->content)->top = syntaxelement;
+	return ((struct SyntaxElement*)syntaxelement->content);
+}
+
+struct SyntaxElement* se_next(struct SyntaxElement* syntaxelement) {
+	syntaxelement->next = se_create();
+	syntaxelement->next->top = syntaxelement->top;
+	return syntaxelement->next;
+}
+
+void se_free(struct SyntaxElement* syntaxtree) {
+	switch (syntaxtree->type) {
+		case NONE:
+			free(syntaxtree);
+			return;
+		case TREE:
+		case TOPTREE:
+			if (syntaxtree->content != NULL) {
+				se_free((struct SyntaxElement*)syntaxtree->content);
+			}
+			break;
+		default:
+			free(syntaxtree->content);
+			break;
+	}
+	if (syntaxtree->next != NULL) {
+		se_free(syntaxtree->next);
+	}
+	free(syntaxtree);
+}
+
+// Remove NONEs from the syntax tree.
+void se_clean(struct SyntaxElement* syntaxtree) {
+	if (syntaxtree->next != NULL) {
+		switch (syntaxtree->next->type) {
+			case NONE:
+				free(syntaxtree->next);
+				syntaxtree->next = NULL;
+				break;
+			default:
+				se_clean(syntaxtree->next);
+				break;
+		}
+	}
+	if (syntaxtree->content != NULL && (syntaxtree->type == TOPTREE || syntaxtree->type == TREE)) {
+		switch (((struct SyntaxElement*)syntaxtree->content)->type) {
+			case NONE:
+				free(syntaxtree->content);
+				syntaxtree->content = NULL;
+				break;
+			default:
+				se_clean((struct SyntaxElement*)syntaxtree->content);
+				break;
+		}
+	}
+}
+
diff --git a/src/syntax.h b/src/syntax.h
new file mode 100644
index 0000000..eaac577
--- /dev/null
+++ b/src/syntax.h
@@ -0,0 +1,25 @@
+#ifndef SYNTAX_H
+#define SYNTAX_H
+enum SyntaxElementType {
+	TOPTREE,
+	TREE,
+	TOKEN,
+	STRING,
+	NUMBER,
+	NONE
+};
+
+struct SyntaxElement {
+	enum SyntaxElementType type;
+	void* content;
+	struct SyntaxElement* next;
+	struct SyntaxElement* top;
+};
+
+void se_clean(struct SyntaxElement* syntaxtree);
+struct SyntaxElement* se_create(void);
+struct SyntaxElement* se_init(void);
+struct SyntaxElement* se_bottom(struct SyntaxElement* syntaxelement);
+struct SyntaxElement* se_next(struct SyntaxElement* syntaxelement);
+void se_free(struct SyntaxElement* syntaxtree);
+#endif