Method operator|

Bcore/src/main/cpp/Dobby/tests/catch.hpp:6094–6096

  }

  template <typename T> auto operator|(T const &other) const -> Parser {
    return Parser(*this) |= other;
  }

  // Forward deprecated interface with '+' instead of '|'
  template <typename T> auto operator+=(T const &other) -> Parser & {