libc/src/__support/str_to_num_result.h

   1 //===-- A data structure for str_to_number to return ------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LLVM_LIBC_SUPPORT_STR_TO_NUM_RESULT_H
  10 #define LLVM_LIBC_SUPPORT_STR_TO_NUM_RESULT_H
  11
  12 #include <stddef.h>
  13
  14 namespace __llvm_libc {
  15
  16 template <typename T> struct StrToNumResult {
  17   T value;
  18   int error;
  19   ptrdiff_t parsed_len;
  20
  21   constexpr StrToNumResult(T value) : value(value), error(0), parsed_len(0) {}
  22   constexpr StrToNumResult(T value, ptrdiff_t parsed_len)
  23       : value(value), error(0), parsed_len(parsed_len) {}
  24   constexpr StrToNumResult(T value, ptrdiff_t parsed_len, int error)
  25       : value(value), error(error), parsed_len(parsed_len) {}
  26
  27   constexpr bool has_error() { return error != 0; }
  28
  29   constexpr operator T() { return value; }
  30 };
  31 } // namespace __llvm_libc
  32
  33 #endif // LLVM_LIBC_SUPPORT_STR_TO_NUM_RESULT_H