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       1                 :            : /******************************************************************************
       2                 :            :  * Top contributors (to current version):
       3                 :            :  *   Andrew Reynolds, Andres Noetzli, Mathias Preiner
       4                 :            :  *
       5                 :            :  * This file is part of the cvc5 project.
       6                 :            :  *
       7                 :            :  * Copyright (c) 2009-2024 by the authors listed in the file AUTHORS
       8                 :            :  * in the top-level source directory and their institutional affiliations.
       9                 :            :  * All rights reserved.  See the file COPYING in the top-level source
      10                 :            :  * directory for licensing information.
      11                 :            :  * ****************************************************************************
      12                 :            :  *
      13                 :            :  * Definitions of parsed operators.
      14                 :            :  */
      15                 :            : 
      16                 :            : #include "cvc5parser_public.h"
      17                 :            : 
      18                 :            : #ifndef CVC5__PARSER__PARSE_OP_H
      19                 :            : #define CVC5__PARSER__PARSE_OP_H
      20                 :            : 
      21                 :            : #include <cvc5/cvc5.h>
      22                 :            : 
      23                 :            : #include <string>
      24                 :            : #include <vector>
      25                 :            : 
      26                 :            : namespace cvc5 {
      27                 :            : 
      28                 :            : /** A parsed operator
      29                 :            :  *
      30                 :            :  * The purpose of this struct is to store information regarding a parsed term
      31                 :            :  * that might not be ready to associate with an expression.
      32                 :            :  *
      33                 :            :  * While parsing terms in smt2, we may store a combination of one or more of
      34                 :            :  * the following to track how to process this term:
      35                 :            :  * (1) A kind.
      36                 :            :  * (2) A string name.
      37                 :            :  * (3) An expression expr.
      38                 :            :  *
      39                 :            :  * Examples:
      40                 :            :  *
      41                 :            :  * - For declared functions f that we have not yet looked up in a symbol table,
      42                 :            :  * we store (2). We may store a name in a state if f is overloaded and we have
      43                 :            :  * not yet parsed its arguments to know how to disambiguate f.
      44                 :            :  * - For tuple selectors (_ tuple_select n), we store (1) and (3). Kind is set to
      45                 :            :  * APPLY_SELECTOR, and expr is set to n, which is to be interpreted by the
      46                 :            :  * caller as the n^th generic tuple selector. We do this since there is no
      47                 :            :  * AST expression representing generic tuple select, and we do not have enough
      48                 :            :  * type information at this point to know the type of the tuple we will be
      49                 :            :  * selecting from.
      50                 :            :  * - For array constant specifications (as const (Array T1 T2)), we store (1)
      51                 :            :  * and (3), where kind is set to INTERNAL_KIND and expr is set to a placeholder
      52                 :            :  * variable of type (Array T1 T2).
      53                 :            :  * When parsing this as an operator e.g. ((as const (Array T1 T2)) t), we
      54                 :            :  * interpret this operator by converting the next parsed constant of type T2 to
      55                 :            :  * an Array of type (Array T1 T2) over that constant.
      56                 :            :  */
      57                 :            : struct ParseOp
      58                 :            : {
      59                 :    7125550 :   ParseOp(cvc5::Kind k = cvc5::Kind::NULL_TERM) : d_kind(k) {}
      60                 :            :   /** The kind associated with the parsed operator, if it exists */
      61                 :            :   cvc5::Kind d_kind;
      62                 :            :   /** The name associated with the parsed operator, if it exists */
      63                 :            :   std::string d_name;
      64                 :            :   /** The expression associated with the parsed operator, if it exists */
      65                 :            :   cvc5::Term d_expr;
      66                 :            :   /**
      67                 :            :    * The indices if the operator is indexed, but cvc5::Op is the null operator.
      68                 :            :    * This is the case for operator symbols that cannot be resolved to a kind
      69                 :            :    * without parsing the arguments. This is currently only the case for
      70                 :            :    * `to_fp`.
      71                 :            :    */
      72                 :            :   std::vector<uint32_t> d_indices;
      73                 :            : 
      74                 :            :   /* Return true if this is equal to 'p'. */
      75                 :            :   bool operator==(const ParseOp& p) const
      76                 :            :   {
      77                 :            :     return d_kind == p.d_kind && d_name == p.d_name && d_expr == p.d_expr
      78                 :            :            && d_indices == p.d_indices;
      79                 :            :   }
      80                 :            : };
      81                 :            : 
      82                 :            : std::ostream& operator<<(std::ostream& os, const ParseOp& p);
      83                 :            : 
      84                 :            : }  // namespace cvc5
      85                 :            : 
      86                 :            : #endif /* CVC5__PARSER__PARSE_OP_H */