diff --git a/lang/lex.c b/lang/lex.c
index b16447c..2e6fa3b 100644
--- a/lang/lex.c
+++ b/lang/lex.c
@@ -9,6 +9,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include "lex.h"
 
 #define LINEBUF_DEFAULT_CAPACITY 1024
 
@@ -17,52 +18,6 @@
 		.id = (i), .name = (n)                                         \
 	}
 
-struct ivy_lexer {
-	struct ivy_lexer_symbol_node *lex_sym_tree;
-	struct ivy_line_source *lex_source;
-	b_dict *lex_keywords;
-	enum ivy_status lex_status;
-
-	struct ivy_token *lex_queue;
-	enum ivy_token_type lex_prev_token;
-
-	b_string *lex_temp;
-	b_queue lex_state;
-	unsigned int lex_brace_depth;
-
-	char *lex_linebuf;
-	size_t lex_linebuf_len;
-	size_t lex_linebuf_cap;
-	size_t lex_linebuf_ptr;
-};
-
-enum lexer_state_type {
-	STATE_NORMAL,
-	STATE_STRING,
-	STATE_FSTRING,
-	STATE_INTERPOLATION,
-};
-
-struct lexer_state {
-	enum lexer_state_type s_type;
-	unsigned int s_brace_depth;
-	b_queue_entry s_entry;
-};
-
-struct ivy_lexer_symbol_node {
-	char s_char;
-	enum ivy_symbol s_id;
-
-	b_queue_entry s_entry;
-	b_queue s_children;
-};
-
-struct lex_token_def {
-	int id;
-	const char *name;
-	uint64_t name_hash;
-};
-
 static struct lex_token_def keywords[] = {
 	LEX_TOKEN_DEF(IVY_KW_PACKAGE, "package"),
 	LEX_TOKEN_DEF(IVY_KW_USE, "use"),
@@ -282,29 +237,6 @@ static struct ivy_lexer_symbol_node *build_symbol_tree(void)
 	return root;
 }
 
-static void print_symbol_node(struct ivy_lexer_symbol_node *node, int depth)
-{
-	for (int i = 0; i < depth; i++) {
-		fputs("    ", stdout);
-	}
-
-	printf("%c", node->s_char);
-
-	if (node->s_id != IVY_SYM_NONE) {
-		printf(" (%s)", ivy_symbol_to_string(node->s_id));
-	}
-
-	printf("\n");
-
-	b_queue_iterator it;
-	b_queue_foreach (&it, &node->s_children) {
-		struct ivy_lexer_symbol_node *child = b_unbox(
-			struct ivy_lexer_symbol_node, it.entry, s_entry);
-
-		print_symbol_node(child, depth + 1);
-	}
-}
-
 static void init_keywords(b_dict *keyword_dict)
 {
 	for (size_t i = 0; i < nr_keywords; i++) {
@@ -349,8 +281,6 @@ enum ivy_status ivy_lexer_create(struct ivy_lexer **lexp)
 		return IVY_ERR_NO_MEMORY;
 	}
 
-	print_symbol_node(lex->lex_sym_tree, 0);
-
 	lex->lex_keywords = b_dict_create();
 	init_keywords(lex->lex_keywords);
 	*lexp = lex;
diff --git a/lang/lex.h b/lang/lex.h
new file mode 100644
index 0000000..c48d717
--- /dev/null
+++ b/lang/lex.h
@@ -0,0 +1,55 @@
+#ifndef _LEX_H_
+#define _LEX_H_
+
+#include <blue/core/queue.h>
+#include <blue/object/string.h>
+#include <blue/object/dict.h>
+#include <stdint.h>
+
+struct ivy_lexer {
+	struct ivy_lexer_symbol_node *lex_sym_tree;
+	struct ivy_line_source *lex_source;
+	b_dict *lex_keywords;
+	enum ivy_status lex_status;
+
+	struct ivy_token *lex_queue;
+	enum ivy_token_type lex_prev_token;
+
+	b_string *lex_temp;
+	b_queue lex_state;
+	unsigned int lex_brace_depth;
+
+	char *lex_linebuf;
+	size_t lex_linebuf_len;
+	size_t lex_linebuf_cap;
+	size_t lex_linebuf_ptr;
+};
+
+enum lexer_state_type {
+	STATE_NORMAL,
+	STATE_STRING,
+	STATE_FSTRING,
+	STATE_INTERPOLATION,
+};
+
+struct lexer_state {
+	enum lexer_state_type s_type;
+	unsigned int s_brace_depth;
+	b_queue_entry s_entry;
+};
+
+struct ivy_lexer_symbol_node {
+	char s_char;
+	enum ivy_symbol s_id;
+
+	b_queue_entry s_entry;
+	b_queue s_children;
+};
+
+struct lex_token_def {
+	int id;
+	const char *name;
+	uint64_t name_hash;
+};
+
+#endif
\ No newline at end of file