#ifndef TOKEN_TYPE_H
#define TOKEN_TYPE_H
#include "express/symbol.h"
#include "express/linklist.h"
#include "stack.h"
#include "express/express.h"
#include "express/schema.h"
#include "express/entity.h"
#include "express/resolve.h"

/* structured types for parse node decorations */
struct type_either {
    Type     type;
    TypeBody body;
};

struct type_flags {
    unsigned optional: 1;
    unsigned unique: 1;
    unsigned fixed: 1;
    unsigned var: 1;        /**< when formal is "VAR" */
};

struct entity_body {
    Linked_List attributes;
    Linked_List unique;
    Linked_List where;
};

struct subsuper_decl {
    Expression  subtypes;
    Linked_List supertypes;
    bool     abstract;
};

struct subtypes {
    Expression  subtypes;
    bool     abstract;
};

struct upper_lower {
    Expression  lower_limit;
    Expression  upper_limit;
};

struct qualifier {
    Expression  expr;   /**< overall expression for qualifier */
    Expression  first;  /**< first [syntactic] qualifier (if more than one is
                          * contained in this [semantic] qualifier - used for
                          * group_ref + attr_ref - see rule for qualifier)
                          */
};

/** simple (single-valued) node types */
typedef union YYSTYPE {
    Binary           binary;
    Case_Item        case_item;
    Expression       expression;
    Integer          iVal;
    Linked_List      list;
    Logical          logical;
    Op_Code          op_code;
    Qualified_Attr * qualified_attr;
    Real             rVal;
    Statement        statement;
    Symbol         * symbol;
    char           * string;
    Type             type;
    TypeBody         typebody;
    Variable         variable;
    Where            where;

    struct type_either   type_either;
    struct type_flags    type_flags;
    struct entity_body   entity_body;
    struct subsuper_decl subsuper_decl;
    struct subtypes      subtypes;
    struct upper_lower   upper_lower;
    struct qualifier     qualifier;
    unsigned int val;
} YYSTYPE;
#endif