61 lines
2 KiB
C
61 lines
2 KiB
C
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/*
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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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#include "kernel/io_state.h"
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namespace lean {
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/**
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\brief Base class for \c regular and \c diagnostic wrapper classes.
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*/
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class io_state_stream {
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protected:
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io_state const & m_io_state;
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public:
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io_state_stream(io_state const & s):m_io_state(s) {}
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virtual std::ostream & get_stream() const = 0;
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void flush() { get_stream().flush(); }
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formatter get_formatter() const { return m_io_state.get_formatter(); }
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options get_options() const { return m_io_state.get_options(); }
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};
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/**
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\brief Wrapper for the io_state object that provides access to the
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io_state's regular channel
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*/
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class regular : public io_state_stream {
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public:
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regular(io_state const & s):io_state_stream(s) {}
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std::ostream & get_stream() const { return m_io_state.get_regular_channel().get_stream(); }
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};
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/**
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\brief Wrapper for the io_state object that provides access to the
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io_state's diagnostic channel
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*/
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class diagnostic : public io_state_stream {
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public:
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diagnostic(io_state const & s):io_state_stream(s) {}
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std::ostream & get_stream() const { return m_io_state.get_diagnostic_channel().get_stream(); }
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};
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// hack for using std::endl with channels
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struct endl_class { endl_class() {} };
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const endl_class endl;
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class kernel_exception;
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io_state_stream const & operator<<(io_state_stream const & out, endl_class);
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io_state_stream const & operator<<(io_state_stream const & out, expr const & e);
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io_state_stream const & operator<<(io_state_stream const & out, object const & obj);
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io_state_stream const & operator<<(io_state_stream const & out, environment const & env);
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io_state_stream const & operator<<(io_state_stream const & out, kernel_exception const & ex);
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template<typename T> io_state_stream const & operator<<(io_state_stream const & out, T const & t) {
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out.get_stream() << t;
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return out;
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}
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}
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