Teuchos_EnvVariables.hpp

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// @HEADER
// *****************************************************************************
//                    Teuchos: Common Tools Package
//
// Copyright 2004 NTESS and the Teuchos contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef TEUCHOS_ENVVARIABLES_HPP
#define TEUCHOS_ENVVARIABLES_HPP

#include <string_view>

namespace Teuchos {

template <typename T>
T getEnvironmentVariable(const std::string_view environmentVariableName,
                         const T defaultValue);

bool idempotentlyGetNamedEnvironmentVariableAsBool(
    const char name[], bool &initialized, const char environmentVariableName[],
    const bool defaultValue);

template <typename T>
T idempotentlyGetEnvironmentVariable(
    T &value, bool &initialized, const std::string_view environmentVariableName,
    const T defaultValue);

} // namespace Teuchos

#endif