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104 lines
3.9 KiB
C++
104 lines
3.9 KiB
C++
// This file is distributed under the BSD License.
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// See "license.txt" for details.
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// Copyright 2009-2012, Jonathan Turner (jonathan@emptycrate.com)
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// Copyright 2009-2018, Jason Turner (jason@emptycrate.com)
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// http://www.chaiscript.com
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// This is an open source non-commercial project. Dear PVS-Studio, please check it.
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// PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
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#ifndef CHAISCRIPT_ALGEBRAIC_HPP_
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#define CHAISCRIPT_ALGEBRAIC_HPP_
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#include "../utility/hash.hpp"
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#include <string>
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namespace chaiscript
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{
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struct Operators {
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enum class Opers
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{
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equals, less_than, greater_than, less_than_equal, greater_than_equal, not_equal,
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assign, pre_increment, pre_decrement, assign_product, assign_sum,
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assign_quotient, assign_difference,
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assign_bitwise_and, assign_bitwise_or, assign_shift_left, assign_shift_right,
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assign_remainder, assign_bitwise_xor,
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shift_left, shift_right, remainder, bitwise_and, bitwise_or, bitwise_xor, bitwise_complement,
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sum, quotient, product, difference, unary_plus, unary_minus,
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invalid
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};
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constexpr static const char *to_string(Opers t_oper) noexcept {
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constexpr const char *opers[] = {
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"",
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"==", "<", ">", "<=", ">=", "!=",
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"",
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"=", "++", "--", "*=", "+=",
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"/=", "-=",
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"",
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"&=", "|=", "<<=", ">>=",
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"%=", "^=",
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"",
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"<<", ">>", "%", "&", "|", "^", "~",
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"",
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"+", "/", "*", "-", "+", "-",
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""
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};
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return opers[static_cast<int>(t_oper)];
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}
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constexpr static Opers to_operator(std::string_view t_str, bool t_is_unary = false) noexcept
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{
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#ifdef CHAISCRIPT_MSVC
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#pragma warning(push)
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#pragma warning(disable : 4307)
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#endif
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const auto op_hash = utility::hash(t_str);
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switch (op_hash) {
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case utility::hash("=="): { return Opers::equals; }
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case utility::hash("<"): { return Opers::less_than; }
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case utility::hash(">"): { return Opers::greater_than; }
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case utility::hash("<="): { return Opers::less_than_equal; }
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case utility::hash(">="): { return Opers::greater_than_equal; }
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case utility::hash("!="): { return Opers::not_equal; }
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case utility::hash("="): { return Opers::assign; }
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case utility::hash("++"): { return Opers::pre_increment; }
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case utility::hash("--"): { return Opers::pre_decrement; }
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case utility::hash("*="): { return Opers::assign_product; }
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case utility::hash("+="): { return Opers::assign_sum; }
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case utility::hash("-="): { return Opers::assign_difference; }
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case utility::hash("&="): { return Opers::assign_bitwise_and; }
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case utility::hash("|="): { return Opers::assign_bitwise_or; }
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case utility::hash("<<="): { return Opers::assign_shift_left; }
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case utility::hash(">>="): { return Opers::assign_shift_right; }
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case utility::hash("%="): { return Opers::assign_remainder; }
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case utility::hash("^="): { return Opers::assign_bitwise_xor; }
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case utility::hash("<<"): { return Opers::shift_left; }
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case utility::hash(">>"): { return Opers::shift_right; }
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case utility::hash("%"): { return Opers::remainder; }
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case utility::hash("&"): { return Opers::bitwise_and; }
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case utility::hash("|"): { return Opers::bitwise_or; }
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case utility::hash("^"): { return Opers::bitwise_xor; }
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case utility::hash("~"): { return Opers::bitwise_complement; }
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case utility::hash("+"): { return t_is_unary ? Opers::unary_plus : Opers::sum; }
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case utility::hash("-"): { return t_is_unary ? Opers::unary_minus : Opers::difference; }
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case utility::hash("/"): { return Opers::quotient; }
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case utility::hash("*"): { return Opers::product; }
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default: { return Opers::invalid; }
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}
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#ifdef CHAISCRIPT_MSVC
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#pragma warning(pop)
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#endif
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}
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};
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}
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#endif /* _CHAISCRIPT_ALGEBRAIC_HPP */
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