102 lines
4.1 KiB
C++
102 lines
4.1 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 "name.h"
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#include "list.h"
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#include "format.h"
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namespace lean {
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/**
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\brief Operator fixity.
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Prefix: ID _
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Infixl: _ ID _ (left associative)
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Infixr: _ ID _ (right associative)
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Postfix: _ ID
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Mixfixl: ID _ ID _ ... ID _ (has at least two parts)
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Mixfixr: _ ID _ ID ... _ ID (has at least two parts)
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Mixfixc: ID _ ID _ ... ID _ ID (has at least two parts)
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*/
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enum class fixity { Prefix, Infixl, Infixr, Postfix, Mixfixl, Mixfixr, Mixfixc };
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/**
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\brief Data-structure for storing user defined operator
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information. This information is used during parsing and
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pretty-printing.
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*/
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class operator_info {
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struct imp;
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imp * m_ptr;
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explicit operator_info(imp * p);
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public:
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operator_info():m_ptr(nullptr) {}
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operator_info(operator_info const & info);
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operator_info(operator_info && info);
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~operator_info();
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operator_info & operator=(operator_info const & o);
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operator_info & operator=(operator_info && o);
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friend void swap(operator_info & o1, operator_info & o2) { std::swap(o1.m_ptr, o2.m_ptr); }
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friend bool is_nil(operator_info const & o) { return o.m_ptr == nullptr; }
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friend operator_info infixl(name const & op, unsigned precedence);
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friend operator_info infixr(name const & op, unsigned precedence);
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friend operator_info prefix(name const & op, unsigned precedence);
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friend operator_info postfix(name const & op, unsigned precedence);
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friend operator_info mixfixl(unsigned num_parts, name const * parts, unsigned precedence);
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friend operator_info mixfixr(unsigned num_parts, name const * parts, unsigned precedence);
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friend operator_info mixfixc(unsigned num_parts, name const * parts, unsigned precedence);
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/** \brief Associate an internal name for this operator. */
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void add_internal_name(name const & n);
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/** \brief Return true iff the operator is overloaded. */
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bool is_overloaded() const;
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/**
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\brief Return the list of internal names for this operator.
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The list has size greater than 1 iff the operator has been
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overloaded.
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Internal names are the real names used to identify the operator
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in the kernel.
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*/
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list<name> const & get_internal_names() const;
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/** \brief Return the operator fixity. */
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fixity get_fixity() const;
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/** \brief Return the operator precedence. */
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unsigned get_precedence() const;
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/** \brief Return the operator name. For mixfix operators the result corresponds to the first part. */
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name const & get_op_name() const;
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/** \brief Return the operators parts. */
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list<name> const & get_op_name_parts() const;
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/** \brief Return a copy of the operator. */
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operator_info copy() const;
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friend bool operator==(operator_info const & op1, operator_info const & op2);
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friend bool operator!=(operator_info const & op1, operator_info const & op2) { return !(op1 == op2); }
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};
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operator_info infixl(name const & op, unsigned precedence);
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operator_info infixr(name const & op, unsigned precedence);
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operator_info prefix(name const & op, unsigned precedence);
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operator_info postfix(name const & op, unsigned precedence);
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operator_info mixfixl(unsigned num_parts, name const * parts, unsigned precedence);
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operator_info mixfixr(unsigned num_parts, name const * parts, unsigned precedence);
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operator_info mixfixc(unsigned num_parts, name const * parts, unsigned precedence);
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inline operator_info mixfixl(std::initializer_list<name> const & l, unsigned precedence) { return mixfixl(l.size(), l.begin(), precedence); }
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inline operator_info mixfixr(std::initializer_list<name> const & l, unsigned precedence) { return mixfixr(l.size(), l.begin(), precedence); }
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inline operator_info mixfixc(std::initializer_list<name> const & l, unsigned precedence) { return mixfixc(l.size(), l.begin(), precedence); }
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format pp(operator_info const & o);
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std::ostream & operator<<(std::ostream & out, operator_info const & o);
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}
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