63 lines
2.6 KiB
C++
63 lines
2.6 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 <memory>
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#include "util/sexpr/options.h"
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#include "kernel/context.h"
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#include "kernel/environment.h"
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namespace lean {
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/**
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\brief API for formatting expressions, contexts and environments.
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*/
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class formatter_cell {
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public:
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virtual ~formatter_cell() {}
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/** \brief Format the given expression. */
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virtual format operator()(expr const & e, options const & opts) = 0;
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/** \brief Format the given context. */
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virtual format operator()(context const & c, options const & opts) = 0;
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/**
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\brief Format the given expression with respect to the given
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context.
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\remark If format_ctx == false, then the context is not formatted. It just provides names
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for the free variables
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*/
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virtual format operator()(context const & c, expr const & e, bool format_ctx, options const & opts) = 0;
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/** \brief Format the given object */
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virtual format operator()(object const & obj, options const & opts) = 0;
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/** \brief Format the given environment */
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virtual format operator()(ro_environment const & env, options const & opts) = 0;
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/**
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\brief Return environment object associated with this formatter.
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Not every formatter has an associated environment object.
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*/
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virtual optional<ro_environment> get_environment() const { return optional<ro_environment>(); }
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};
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/**
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\brief Smart-pointer for the actual formatter object (aka \c formatter_cell).
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*/
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class formatter {
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std::shared_ptr<formatter_cell> m_cell;
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formatter(formatter_cell * c):m_cell(c) {}
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public:
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format operator()(expr const & e, options const & opts = options()) const { return (*m_cell)(e, opts); }
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format operator()(context const & c, options const & opts = options()) const { return (*m_cell)(c, opts); }
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format operator()(context const & c, expr const & e, bool format_ctx = false, options const & opts = options()) const { return (*m_cell)(c, e, format_ctx, opts); }
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format operator()(object const & obj, options const & opts = options()) const { return (*m_cell)(obj, opts); }
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format operator()(ro_environment const & env, options const & opts = options()) const { return (*m_cell)(env, opts); }
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optional<ro_environment> get_environment() { return m_cell->get_environment(); }
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template<typename FCell> friend formatter mk_formatter(FCell && fcell);
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};
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template<typename FCell> formatter mk_formatter(FCell && fcell) {
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return formatter(new FCell(std::forward<FCell>(fcell)));
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}
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}
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