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#ifndef TREE_H_HG
#define TREE_H_HG
#include <stdio.h>
enum nodeType {
BIOP,
UNOP,
LTTR
};
typedef struct node {
enum nodeType type;
char el;
union {
struct node *child[2];
struct {
struct node *lhs, *rhs;
};
struct node *value;
};
} node;
node * parse(char *str);
void fprintTree(FILE *stream, node *root, int level);
void printTree(node *root, int level);
void free_node(node *n);
/// Takes an expression and a bitfield of the
/// letters' truthiness values
char eval_tree(node *root, unsigned int alph_bools);
#endif
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