53 lines
1.4 KiB
C++
53 lines
1.4 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 <iostream>
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#include "util/interruptable_ptr.h"
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#include "frontends/lean/frontend.h"
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namespace lean {
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/** \brief Functional object for parsing commands and expressions */
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class parser {
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class imp;
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std::unique_ptr<imp> m_ptr;
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public:
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parser(frontend const & fe, std::istream & in, bool use_exceptions = true, bool interactive = false);
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~parser();
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/** \brief Parse a sequence of commands */
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bool operator()();
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/** \brief Parse a single expression */
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expr parse_expr();
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void set_interrupt(bool flag);
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void interrupt() { set_interrupt(true); }
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void reset_interrupt() { set_interrupt(false); }
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};
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/** \brief Implements the Read Eval Print loop */
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class shell {
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frontend m_frontend;
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interruptable_ptr<parser> m_parser;
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public:
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shell(frontend const & fe);
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~shell();
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bool operator()();
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void set_interrupt(bool flag);
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void interrupt() { set_interrupt(true); }
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void reset_interrupt() { set_interrupt(false); }
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};
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inline bool parse_commands(frontend & fe, std::istream & in, bool use_exceptions = true, bool interactive = false) {
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return parser(fe, in, use_exceptions, interactive)();
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}
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inline expr parse_expr(frontend const & fe, std::istream & in) {
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return parser(fe, in).parse_expr();
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}
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}
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