#ifndef BDL_NODES_H
#define BDL_NODES_H

typedef enum NodeType {
    NODE_BUILTIN,
    NODE_NUMBER,
    NODE_BOOL,
    NODE_STRING,
    NODE_SYMBOL,
    NODE_TYPE,
    NODE_DEF,
    NODE_SET,
    NODE_FUN,
} NodeType;

typedef struct Node {
    NodeType type;

    union {
        // Numbers.
        struct {
            bool negative;
            size_t integral;
            size_t fractional;
        } number;

        // String/symbol.
        StringView string;

        // Boolean.
        bool boolean;

        // Builtin primitive.
        struct {
            TokenType type;
            struct Node **args;
        } builtin;

        // Variable definition.
        struct {
            struct Node *symbol;
            struct Node *value;
            struct Node *type;
        } def;

        // Variable assignment.
        struct {
            struct Node *symbol;
            struct Node *value;
        } set;

        // Function definition.
        struct {
            struct Node *name;
            struct Node **param_names;
            struct Node **param_types;
            struct Node *return_type;
            struct Node **body;
        } fun;
    };
} Node;

#endif // BDL_NODES_H