46 lines
2.4 KiB
C++
46 lines
2.4 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 "library/tactic/tactic.h"
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namespace lean {
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bool solve_constraints(environment const & env, io_state const & ios, proof_state & ps, constraint_seq const & cs);
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/** \brief Function for elaborating expressions nested in tactics.
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Some tactics contain nested expression (aka pre-terms) that need to be elaborated.
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The arguments are:
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1- goal that will provide the context where the expression will be elaborated
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2- name generator
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3- expression to be elaborated
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4- expected type
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5- substitution associated with the proof state
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6- a flag indicating whether the elaborator should report unassigned/unsolved placeholders
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The results are
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1- elaborated expression
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2- updated substitution
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3- postponed constraints
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*/
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typedef std::tuple<expr, substitution, constraints> elaborate_result;
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typedef std::function<elaborate_result(goal const &, options const &, name_generator &&, expr const &,
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optional<expr> const &, substitution const &, bool)> elaborate_fn;
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/** \brief Try to elaborate expression \c e using the elaboration function \c elab. The elaboration is performed
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with respect to (local context of) the first goal in \c s. The constraints generated during elaboration
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are solved using the higher-order unifier. When solving the constraints any postponed constraint in \c s
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is also considered. Only the first solution returned by the unifier is considered.
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If the whole process succeeds, then the elaborated expression is returned, and the proof state is updated.
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The following fields in the name generator may be updated: name-generator and substitution.
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If the proof state has no goal, the elaboration or unifier fails, then none is returned and the proof state
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is not modified.
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*/
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optional<expr> elaborate_with_respect_to(environment const & env, io_state const & ios, elaborate_fn const & elab,
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proof_state & s, expr const & e,
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optional<expr> const & expected_type = optional<expr>(),
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bool report_unassigned = false, bool enforce_type_during_elaboration = false,
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bool conservative = false);
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}
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