/
rank.go
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/
rank.go
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//
// FrankyGo - UCI chess engine in GO for learning purposes
//
// MIT License
//
// Copyright (c) 2018-2020 Frank Kopp
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
package types
// Rank represents a chess board rank 1-8
type Rank uint8
// Rank represents a chess board rank 1-8
//noinspection GoUnusedConst
const (
Rank1 Rank = iota
Rank2 Rank = iota
Rank3 Rank = iota
Rank4 Rank = iota
Rank5 Rank = iota
Rank6 Rank = iota
Rank7 Rank = iota
Rank8 Rank = iota
RankNone Rank = iota
RankLength = RankNone
)
// IsValid checks if f represents a valid file
func (r Rank) IsValid() bool {
return r < RankNone
}
// Bb returns a Bitboard of the given rank
func (r Rank) Bb() Bitboard {
return rankBb[r]
}
const rankLabels string = "12345678"
// String returns a string letter for the file (e.g. a - h)
// if r is not a valid rank returns "-"
func (r Rank) String() string {
if r > Rank8 {
return "-"
}
return string(rankLabels[r])
}