parse_as¶

namespace parse_as¶

Tag types for selecting parsing strategies.

struct Default¶: #include <parse_tags.h>

Default parsing strategy.

struct Fen¶: #include <parse_tags.h>

Forsyth–Edwards Notation (FEN) parsing.

struct Lowercase¶: #include <parse_tags.h>

Lowercase parsing.

struct Pgn¶: #include <parse_tags.h>

Portable Game Notation (PGN) parsing.

struct Uppercase¶: #include <parse_tags.h>

Uppercase parsing.

Examples¶

#include <chesscxx/game.h>
#include <chesscxx/parse.h>
#include <chesscxx/piece_type.h>

#include <print>

namespace {
void printErrorOrValue(auto parsed_value) {
  if (parsed_value) {
    std::println("{}", parsed_value.value());
  } else {
    std::println("{}", parsed_value.error());
  }
}
}  // namespace

auto main() -> int {
  auto parsed_piece_type = chesscxx::parse<chesscxx::PieceType>(
      "r", chesscxx::parse_as::Uppercase{});
  printErrorOrValue(parsed_piece_type);

  parsed_piece_type = chesscxx::parse<chesscxx::PieceType>(
      "r", chesscxx::parse_as::Lowercase{});
  printErrorOrValue(parsed_piece_type);

  auto parsed_game = chesscxx::parse<chesscxx::Game>(
      "rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - 0 1",
      chesscxx::parse_as::Fen{});
  printErrorOrValue(parsed_game);

  parsed_game = chesscxx::parse<chesscxx::Game>(
      "rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - 0 1",
      chesscxx::parse_as::Pgn{});
  printErrorOrValue(parsed_game);
}

Output:

Invalid piece type
rook
[Result "*"]
[FEN "rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - 0 1"]
[SetUp "1"]

*
Invalid file