error.ipp 5.6 KB

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  1. //
  2. // Copyright (c) 2019 Vinnie Falco (vinnie.falco@gmail.com)
  3. //
  4. // Distributed under the Boost Software License, Version 1.0. (See accompanying
  5. // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  6. //
  7. // Official repository: https://github.com/boostorg/json
  8. //
  9. #ifndef BOOST_JSON_IMPL_ERROR_IPP
  10. #define BOOST_JSON_IMPL_ERROR_IPP
  11. #include <boost/json/error.hpp>
  12. namespace boost {
  13. namespace json {
  14. error_code
  15. make_error_code(error e)
  16. {
  17. struct codes : error_category
  18. {
  19. const char*
  20. name() const noexcept override
  21. {
  22. return "boost.json";
  23. }
  24. char const* message( int ev, char*, std::size_t ) const noexcept
  25. override
  26. {
  27. switch(static_cast<error>(ev))
  28. {
  29. default:
  30. case error::syntax: return "syntax error";
  31. case error::extra_data: return "extra data";
  32. case error::incomplete: return "incomplete JSON";
  33. case error::exponent_overflow: return "exponent overflow";
  34. case error::too_deep: return "too deep";
  35. case error::illegal_leading_surrogate: return "illegal leading surrogate";
  36. case error::illegal_trailing_surrogate: return "illegal trailing surrogate";
  37. case error::expected_hex_digit: return "expected hex digit";
  38. case error::expected_utf16_escape: return "expected utf16 escape";
  39. case error::object_too_large: return "object too large";
  40. case error::array_too_large: return "array too large";
  41. case error::key_too_large: return "key too large";
  42. case error::string_too_large: return "string too large";
  43. case error::input_error: return "input error";
  44. case error::exception: return "got exception";
  45. case error::test_failure: return "test failure";
  46. case error::missing_slash: return "missing slash character";
  47. case error::invalid_escape: return "invalid escape sequence";
  48. case error::token_not_number: return "token is not a number";
  49. case error::value_is_scalar: return "current value is scalar";
  50. case error::not_found: return "no referenced value";
  51. case error::token_overflow: return "token overflow";
  52. case error::past_the_end: return "past-the-end token not supported";
  53. case error::not_number: return "not a number";
  54. case error::not_exact: return "not exact";
  55. case error::not_null: return "value is not null";
  56. case error::not_bool: return "value is not boolean";
  57. case error::not_array: return "value is not an array";
  58. case error::not_object: return "value is not an object";
  59. case error::not_string: return "value is not a string";
  60. case error::size_mismatch: return "array size does not match target size";
  61. case error::exhausted_variants: return "exhausted all variants";
  62. case error::unknown_name: return "unknown name";
  63. }
  64. }
  65. std::string
  66. message( int ev ) const override
  67. {
  68. return message( ev, nullptr, 0 );
  69. }
  70. error_condition
  71. default_error_condition(
  72. int ev) const noexcept override
  73. {
  74. switch(static_cast<error>(ev))
  75. {
  76. default:
  77. return {ev, *this};
  78. case error::syntax:
  79. case error::extra_data:
  80. case error::incomplete:
  81. case error::exponent_overflow:
  82. case error::too_deep:
  83. case error::illegal_leading_surrogate:
  84. case error::illegal_trailing_surrogate:
  85. case error::expected_hex_digit:
  86. case error::expected_utf16_escape:
  87. case error::object_too_large:
  88. case error::array_too_large:
  89. case error::key_too_large:
  90. case error::string_too_large:
  91. case error::input_error:
  92. return condition::parse_error;
  93. case error::missing_slash:
  94. case error::invalid_escape:
  95. return condition::pointer_parse_error;
  96. case error::token_not_number:
  97. case error::value_is_scalar:
  98. case error::not_found:
  99. case error::token_overflow:
  100. case error::past_the_end:
  101. return condition::pointer_use_error;
  102. case error::not_number:
  103. case error::not_exact:
  104. case error::not_null:
  105. case error::not_bool:
  106. case error::not_array:
  107. case error::not_object:
  108. case error::not_string:
  109. case error::size_mismatch:
  110. case error::exhausted_variants:
  111. case error::unknown_name:
  112. return condition::conversion_error;
  113. case error::exception:
  114. return condition::generic_error;
  115. }
  116. }
  117. };
  118. // on some versions of msvc-14.2 the category is put in RO memory
  119. // erroneusly, if the category object is const,
  120. // and that may result in crash
  121. static codes cat{};
  122. return error_code{static_cast<
  123. std::underlying_type<error>::type>(e), cat};
  124. }
  125. error_condition
  126. make_error_condition(condition c)
  127. {
  128. struct codes : error_category
  129. {
  130. const char*
  131. name() const noexcept override
  132. {
  133. return "boost.json";
  134. }
  135. char const* message( int cv, char*, std::size_t ) const noexcept
  136. override
  137. {
  138. switch(static_cast<condition>(cv))
  139. {
  140. default:
  141. case condition::parse_error:
  142. return "A JSON parse error occurred";
  143. case condition::pointer_parse_error:
  144. return "A JSON Pointer parse error occurred";
  145. case condition::pointer_use_error:
  146. return "An error occurred when JSON Pointer was used with"
  147. " a value";
  148. case condition::conversion_error:
  149. return "An error occurred during conversion";
  150. }
  151. }
  152. std::string
  153. message( int cv ) const override
  154. {
  155. return message( cv, nullptr, 0 );
  156. }
  157. };
  158. // on some versions of msvc-14.2 the category is put in RO memory
  159. // erroneusly, if the category object is const,
  160. // and that may result in crash
  161. static codes cat{};
  162. return error_condition{static_cast<
  163. std::underlying_type<condition>::type>(c), cat};
  164. }
  165. } // namespace json
  166. } // namespace boost
  167. #endif