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/* Definitions for Rust expressions
Copyright (C) 2020-2022 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef RUST_EXP_H
#define RUST_EXP_H
#include "expop.h"
extern struct value *eval_op_rust_complement (struct type *expect_type,
struct expression *exp,
enum noside noside,
enum exp_opcode opcode,
struct value *value);
extern struct value *eval_op_rust_array (struct type *expect_type,
struct expression *exp,
enum noside noside,
enum exp_opcode opcode,
struct value *ncopies,
struct value *elt);
extern struct value *rust_subscript (struct type *expect_type,
struct expression *exp,
enum noside noside, bool for_addr,
struct value *lhs, struct value *rhs);
extern struct value *rust_range (struct type *expect_type,
struct expression *exp,
enum noside noside, enum range_flag kind,
struct value *low, struct value *high);
namespace expr
{
using rust_unop_compl_operation = unop_operation<UNOP_COMPLEMENT,
eval_op_rust_complement>;
using rust_array_operation = binop_operation<OP_RUST_ARRAY,
eval_op_rust_array>;
/* The Rust indirection operation. */
class rust_unop_ind_operation
: public unop_ind_operation
{
public:
using unop_ind_operation::unop_ind_operation;
value *evaluate (struct type *expect_type,
struct expression *exp,
enum noside noside) override;
};
/* Subscript operator for Rust. */
class rust_subscript_operation
: public tuple_holding_operation<operation_up, operation_up>
{
public:
using tuple_holding_operation::tuple_holding_operation;
value *evaluate (struct type *expect_type,
struct expression *exp,
enum noside noside) override
{
value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
value *arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
return rust_subscript (expect_type, exp, noside, false, arg1, arg2);
}
value *slice (struct type *expect_type,
struct expression *exp,
enum noside noside)
{
value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
value *arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
return rust_subscript (expect_type, exp, noside, true, arg1, arg2);
}
enum exp_opcode opcode () const override
{ return BINOP_SUBSCRIPT; }
};
class rust_unop_addr_operation
: public tuple_holding_operation<operation_up>
{
public:
using tuple_holding_operation::tuple_holding_operation;
value *evaluate (struct type *expect_type,
struct expression *exp,
enum noside noside) override
{
operation *oper = std::get<0> (m_storage).get ();
rust_subscript_operation *sub_op
= dynamic_cast<rust_subscript_operation *> (oper);
if (sub_op != nullptr)
return sub_op->slice (expect_type, exp, noside);
return oper->evaluate_for_address (exp, noside);
}
enum exp_opcode opcode () const override
{ return UNOP_ADDR; }
};
/* The Rust range operators. */
class rust_range_operation
: public tuple_holding_operation<enum range_flag, operation_up, operation_up>
{
public:
using tuple_holding_operation::tuple_holding_operation;
value *evaluate (struct type *expect_type,
struct expression *exp,
enum noside noside) override
{
auto kind = std::get<0> (m_storage);
value *low = nullptr;
if (std::get<1> (m_storage) != nullptr)
low = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
value *high = nullptr;
if (std::get<2> (m_storage) != nullptr)
high = std::get<2> (m_storage)->evaluate (nullptr, exp, noside);
return rust_range (expect_type, exp, noside, kind, low, high);
}
enum exp_opcode opcode () const override
{ return OP_RANGE; }
};
/* Tuple field reference (using an integer). */
class rust_struct_anon
: public tuple_holding_operation<int, operation_up>
{
public:
using tuple_holding_operation::tuple_holding_operation;
value *evaluate (struct type *expect_type,
struct expression *exp,
enum noside noside) override;
enum exp_opcode opcode () const override
{ return STRUCTOP_ANONYMOUS; }
};
/* Structure (or union or enum) field reference. */
class rust_structop
: public structop_base_operation
{
public:
using structop_base_operation::structop_base_operation;
value *evaluate (struct type *expect_type,
struct expression *exp,
enum noside noside) override;
value *evaluate_funcall (struct type *expect_type,
struct expression *exp,
enum noside noside,
const std::vector<operation_up> &args) override;
enum exp_opcode opcode () const override
{ return STRUCTOP_STRUCT; }
};
/* Rust aggregate initialization. */
class rust_aggregate_operation
: public tuple_holding_operation<struct type *, operation_up,
std::vector<std::pair<std::string,
operation_up>>>
{
public:
using tuple_holding_operation::tuple_holding_operation;
value *evaluate (struct type *expect_type,
struct expression *exp,
enum noside noside) override;
enum exp_opcode opcode () const override
{ return OP_AGGREGATE; }
};
} /* namespace expr */
#endif /* RUST_EXP_H */
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