33 lines
627 B
C++
33 lines
627 B
C++
/*
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Copyright (c) 2013 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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*/
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#pragma once
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namespace lean {
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/**
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\brief Template for simulating "fluid-lets".
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Example:
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{
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flet<int> l(m_field, 1); // set the value of m_field to 1
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} // restore original value of m_field
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*/
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template<typename T>
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class flet {
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T & m_ref;
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T m_old_value;
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public:
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flet(T & ref, T const & new_value):
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m_ref(ref),
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m_old_value(ref) {
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m_ref = new_value;
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}
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~flet() {
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m_ref = m_old_value;
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}
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};
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}
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