gcc/rust/util/rust-codepoint.h

   1 // Copyright (C) 2020-2024 Free Software Foundation, Inc.
   2
   3 // This file is part of GCC.
   4
   5 // GCC is free software; you can redistribute it and/or modify it under
   6 // the terms of the GNU General Public License as published by the Free
   7 // Software Foundation; either version 3, or (at your option) any later
   8 // version.
   9
  10 // GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  11 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12 // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13 // for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with GCC; see the file COPYING3.  If not see
  17 // <http://www.gnu.org/licenses/>.
  18
  19 #ifndef RUST_CODEPOINT_H
  20 #define RUST_CODEPOINT_H
  21
  22 #include "rust-system.h"
  23
  24 namespace Rust {
  25
  26 constexpr uint32_t MAX_ASCII_CODEPOINT = 0x7F;
  27 constexpr uint32_t CODEPOINT_INVALID = 0xFFFE;
  28
  29 // FIXME: move this to rust-unicode.h?
  30 struct Codepoint
  31 {
  32   uint32_t value;
  33
  34   // Creates a zero codepoint.
  35   Codepoint () : value (0) {}
  36
  37   // Creates a codepoint from an encoded UTF-8 value.
  38   Codepoint (uint32_t value) : value (value) {}
  39
  40   static Codepoint eof () { return Codepoint (UINT32_MAX); }
  41   bool is_eof () const { return value == UINT32_MAX; }
  42   bool is_ascii () const { return value <= MAX_ASCII_CODEPOINT; }
  43   bool is_supplementary_character () const { return value > 0xFFFF; }
  44
  45   // Returns a C++ string containing string value of codepoint.
  46   std::string as_string ();
  47
  48   bool operator== (Codepoint other) const { return value == other.value; }
  49   bool operator!= (Codepoint other) const { return !operator== (other); }
  50 };
  51 } // namespace Rust
  52
  53 #endif