37 lines
1.2 KiB
C++
37 lines
1.2 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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#include <string>
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#include "kernel/environment.h"
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#include "library/abstract_type_context.h"
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namespace lean {
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/**
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\brief Return an expression that encodes the given string in as a Lean expression.
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\post *to_string(from_string(s)) == s */
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expr from_string(std::string const & s);
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/** \brief If the given expression encodes a string, then convert it back to a string.
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\see from_string */
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optional<std::string> to_string(expr const & e);
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bool is_string_value(expr const & e);
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bool is_string_literal(expr const & e);
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/** \brief Expand string literal if 'e' is a string literal */
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optional<expr> expand_string_literal(expr const & e);
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optional<unsigned> to_char_core(expr const & e);
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bool is_char_value_core(expr const & e);
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optional<unsigned> to_char(abstract_type_context & ctx, expr const & e);
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bool is_char_value(abstract_type_context & ctx, expr const & e);
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format pp_string_literal(std::string const & s);
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format pp_char_literal(unsigned c);
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void initialize_string();
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void finalize_string();
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}
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