#ifndef LITERAL_H
#define LITERAL_H

typedef struct value *value_t;

struct literal {
    enum literal_type {
        LITERAL_STRING,
        LITERAL_NUM_INT,
        LITERAL_NUM_FLOAT
    } type;

    union {
        char *string;
        long num_int;
        float num_float;
    };
};

// struct pair {
// };
// struct proc {
// };

struct value {
    enum value_type {
        VALUE_SYMBOL,
        VALUE_LITERAL,
        VALUE_PAIR,
        VALUE_LIST,
        VALUE_PROC,
        VALUE_TYPES
    } type;

    int references;

    union {
        char *symbol;
        struct literal literal;
        // struct pair pair;
        // struct pari list;
        // struct proc_t proc;
    };
};

// try to save data as a literal
// returns a value_t on success and NULL on fail
// ret is set to: 0 on sucess, > 0 on fail (data isnt this type),
//                and < 0 on error
value_t value_create(enum value_type type, void *data, int *ret);

// returns a value_t on success
value_t value_copy(value_t value);

// destroys a value
void value_destroy(value_t value);

// copy a string version of the value the buf[buf_sz]
// returns buf on success
char *value_string(value_t value, char *buf, size_t buf_sz);

#endif