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/********************* */
/*! \file parse_op.h
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds
** This file is part of the CVC4 project.
** Copyright (c) 2009-2019 by the authors listed in the file AUTHORS
** in the top-level source directory) and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief Definitions of parsed operators.
**/
#include "cvc4parser_public.h"
#ifndef CVC4__PARSER__PARSE_OP_H
#define CVC4__PARSER__PARSE_OP_H
#include <string>
#include "expr/expr.h"
#include "expr/kind.h"
namespace CVC4 {
/** A parsed operator
*
* The purpose of this struct is to store information regarding a parsed term
* that might not be ready to associate with an expression.
*
* While parsing terms in smt2, we may store a combination of one or more of
* the following to track how to process this term:
* (1) A kind.
* (2) A string name.
* (3) An expression expr.
* (4) A type t.
*
* Examples:
*
* - For declared functions f that we have not yet looked up in a symbol table,
* we store (2). We may store a name in a state if f is overloaded and we have
* not yet parsed its arguments to know how to disambiguate f.
* - For tuple selectors (_ tupSel n), we store (1) and (3). Kind is set to
* APPLY_SELECTOR, and expr is set to n, which is to be interpreted by the
* caller as the n^th generic tuple selector. We do this since there is no
* AST expression representing generic tuple select, and we do not have enough
* type information at this point to know the type of the tuple we will be
* selecting from.
* - For array constant specifications prior to type ascription e.g. when we
* have parsed "const", we store (1), setting the kind to STORE_ALL.
* - For array constant specifications (as const (Array T1 T2)), we store (1)
* and (4), where kind is set to STORE_ALL and type is set to (Array T1 T2).
* When parsing this as an operator e.g. ((as const (Array T1 T2)) t), we
* interpret this operator by converting the next parsed constant of type T2 to
* an Array of type (Array T1 T2) over that constant.
*/
struct CVC4_PUBLIC ParseOp
{
ParseOp(Kind k = kind::NULL_EXPR) : d_kind(k) {}
/** The kind associated with the parsed operator, if it exists */
Kind d_kind;
/** The name associated with the parsed operator, if it exists */
std::string d_name;
/** The expression associated with the parsed operator, if it exists */
Expr d_expr;
/** The type associated with the parsed operator, if it exists */
Type d_type;
/* Return true if this is equal to 'p'. */
bool operator==(const ParseOp& p) const
{
return d_kind == p.d_kind && d_name == p.d_name && d_expr == p.d_expr
&& d_type == p.d_type;
}
};
inline std::ostream& operator<<(std::ostream& os, const ParseOp& p)
{
if (!p.d_expr.isNull())
{
return os << p.d_expr;
}
else if (p.d_kind != kind::NULL_EXPR)
{
return os << p.d_kind;
}
return os << "ParseOp::unknown";
}
} // namespace CVC4
#endif /* CVC4__PARSER__PARSE_OP_H */
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