54 lines
2.1 KiB
C++
54 lines
2.1 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 <string>
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#include "kernel/expr.h"
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namespace lean {
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/** \brief Declare a new kind of annotation. It must only be invoked at startup time
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Use helper obect #register_annotation_fn.
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*/
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void register_annotation(name const & n);
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/** \brief Helper object for declaring a new kind of annotation */
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struct register_annotation_fn {
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register_annotation_fn(name const & kind) { register_annotation(kind); }
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};
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/** \brief Create an annotated expression with tag \c kind based on \c e.
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\pre \c kind must have been registered using #register_annotation.
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\remark Annotations have no real semantic meaning, but are useful for guiding pretty printer and/or automation.
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*/
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expr mk_annotation(name const & kind, expr const & e);
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/** \brief Return true iff \c e was created using #mk_annotation. */
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bool is_annotation(expr const & e);
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/** \brief Return true iff \c e was created using #mk_annotation, and has tag \c kind. */
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bool is_annotation(expr const & e, name const & kind);
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/** \brief Return the annotated expression, \c e must have been created using #mk_annotation.
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\post get_annotation_arg(mk_annotation(k, e)) == e
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*/
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expr const & get_annotation_arg(expr const & e);
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/** \brief Return the king of the annotated expression, \c e must have been created using #mk_annotation.
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\post get_annotation_arg(mk_annotation(k, e)) == k
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*/
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name const & get_annotation_kind(expr const & e);
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/** \brief Tag \c e as a 'let'-expression. 'let' is a pre-registered annotation. */
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expr mk_let_annotation(expr const & e);
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/** \brief Tag \c e as a 'have'-expression. 'have' is a pre-registered annotation. */
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expr mk_have_annotation(expr const & e);
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/** \brief Return true iff \c e was created using #mk_let_annotation. */
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bool is_let_annotation(expr const & e);
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/** \brief Return true iff \c e was created using #mk_have_annotation. */
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bool is_have_annotation(expr const & e);
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/** \brief Return the serialization 'opcode' for annotation macros. */
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std::string const & get_annotation_opcode();
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}
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