55 lines
2 KiB
C++
55 lines
2 KiB
C++
/*
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Copyright (c) 2014 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 <vector>
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#include <string>
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#include "frontends/lean/parser.h"
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namespace lean {
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/**
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\brief Class for managing an input stream used to communicate with
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external processes.
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It process blocks of Lean commands separated by an ACK string.
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The lean commands may create snapshots that can be resumed at the start
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of the next block.
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*/
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class interactive {
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struct snapshot {
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environment m_env;
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local_level_decls m_lds;
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local_expr_decls m_eds;
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options m_options;
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unsigned m_line;
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snapshot():m_line(1) {}
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snapshot(environment const & env, local_level_decls const & lds, local_expr_decls const & eds, options const & opts, unsigned line):
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m_env(env), m_lds(lds), m_eds(eds), m_options(opts), m_line(line) {}
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};
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std::vector<snapshot> m_snapshots;
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std::vector<std::string> m_lines;
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environment m_env;
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io_state m_ios;
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unsigned m_num_threads;
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local_level_decls m_lds;
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local_expr_decls m_eds;
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unsigned m_line;
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std::string m_ack_cmd;
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std::string m_snapshot_cmd;
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std::string m_restore_cmd;
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std::string m_restart_cmd;
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void parse_block(std::string const & str, char const * strm_name);
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void save_snapshot();
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void restore(unsigned new_line, std::string & block);
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public:
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interactive(environment const & env, io_state const & ios, unsigned num_threads = 1,
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char const * ack_cmd = "#ACK", char const * snapshot_cmd = "#SNAPSHOT",
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char const * res_cmd = "#RESTORE", char const * restart_cmd = "#RESTART");
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environment const & env() const { return m_env; }
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void operator()(std::istream & in, char const * strm_name);
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};
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}
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