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/*
This file is part of solidity.
solidity 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.
solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
*/
// SPDX-License-Identifier: GPL-3.0
#pragma once
namespace solidity::yul
{
/**
* Side effects of a user-defined or builtin function.
*
* Each of the three booleans represents a reachability condition. There is an implied
* fourth alternative, which is going out of gas while executing the function. Since
* this can always happen and depends on the supply of gas, it is not considered.
*
* If all three booleans are false, it means that the function always leads to infinite
* recursion.
*/
struct ControlFlowSideEffects
{
/// If true, the function contains at least one reachable branch that terminates successfully.
bool canTerminate = false;
/// If true, the function contains at least one reachable branch that reverts.
bool canRevert = false;
/// If true, the function has a regular outgoing control-flow.
bool canContinue = true;
bool terminatesOrReverts() const
{
return (canTerminate || canRevert) && !canContinue;
}
};
}