print funtion added, not tested

include/lexer.h

@@ -74,5 +74,6 @@ LexerErr tokenize_number(const char* input, size_t *offset, ASTNode *out);
 LexerErr string_to_integer(const char buf[], int64_t *number);
 bool isoperator(int c);
 Operator char_to_operator(int c);
+char operator_to_char(Operator op);
 
 #endif // !LEXER_H

include/parser.h

@@ -19,5 +19,9 @@ ASTNode *led(ASTNodeSlice *slice, size_t right_precedence);
 
 uint8_t node_lbp(ASTNode node);
 uint8_t node_rbp(ASTNode node);
+
 AST parse(ASTNodeArray *arr);
 ASTNode *parse_expr(ASTNodeSlice *slice, uint8_t min_bp);
+
+void print_AST(AST tree);
+void print_node(ASTNode *node, int depth);