48 lines
2 KiB
C++
48 lines
2 KiB
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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#include "library/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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environment const & m_env;
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formatter m_formatter;
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output_channel & m_stream;
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io_state_stream(environment const & env, formatter const & fmt, output_channel & s):m_env(env), m_formatter(fmt), m_stream(s) {}
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public:
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io_state_stream(environment const & env, io_state const & ios, bool regular = true):
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m_env(env), m_formatter(ios.get_formatter_factory()(env, ios.get_options())),
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m_stream(regular ? ios.get_regular_channel() : ios.get_diagnostic_channel()) {}
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std::ostream & get_stream() const { return m_stream.get_stream(); }
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void flush() { get_stream().flush(); }
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formatter const & get_formatter() const { return m_formatter; }
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options get_options() const { return m_formatter.get_options(); }
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environment const & get_environment() const { return m_env; }
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io_state_stream update_options(options const & o) const { return io_state_stream(m_env, m_formatter.update_options(o), m_stream); }
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};
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inline io_state_stream regular(environment const & env, io_state const & ios) { return io_state_stream(env, ios, true); }
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inline io_state_stream diagnostic(environment const & env, io_state const & ios) { return io_state_stream(env, ios, false); }
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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, 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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