From 4f96a8f80ee0622e9052ad5d12de2324f52fbb67 Mon Sep 17 00:00:00 2001
From: Nikolai Vazquez <nvazquez1297@gmail.com>
Date: Tue, 19 Jul 2016 14:37:39 -0400
Subject: [PATCH] Fix Swift 3 guard warnings

---
 .swiftlint.yml       |  1 +
 Sources/Game.swift   | 21 ++++++++++++---------
 Sources/Square.swift |  2 +-
 3 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/.swiftlint.yml b/.swiftlint.yml
index cb5bf10..df0058c 100644
--- a/.swiftlint.yml
+++ b/.swiftlint.yml
@@ -12,6 +12,7 @@ disabled_rules: # rule identifiers to exclude from running
     - type_body_length
     - function_body_length
     - comma
+    - conditional_binding_cascade
 
 opt_in_rules: # some rules are only opt-in
     - empty_count
diff --git a/Sources/Game.swift b/Sources/Game.swift
index 8dfcfc4..64462e2 100644
--- a/Sources/Game.swift
+++ b/Sources/Game.swift
@@ -171,14 +171,17 @@ public final class Game {
             #else
                 let parts = fen.characters.split(" ").map(String.init)
             #endif
-            guard parts.count == 6,
-                let board = Board(fen: parts[0])
-                where parts[1].characters.count == 1,
+            guard
+                parts.count == 6,
+                let board = Board(fen: parts[0]),
+                parts[1].characters.count == 1,
                 let playerTurn = parts[1].characters.first.flatMap(Color.init),
-                rights = CastlingRights(string: parts[2]),
-                halfmoves = UInt(parts[4]),
-                fullmoves = UInt(parts[5]) where fullmoves > 0
-                else { return nil }
+                let rights = CastlingRights(string: parts[2]),
+                let halfmoves = UInt(parts[4]),
+                let fullmoves = UInt(parts[5]),
+                fullmoves > 0 else {
+                    return nil
+            }
             var target: Square? = nil
             let targetStr = parts[3]
             let targetChars = targetStr.characters
@@ -335,7 +338,7 @@ public final class Game {
 
     /// The target move location for an en passant.
     public var enPassantTarget: Square? {
-        guard let (move, piece, _, _, _, _) = _moveHistory.last where piece.kind.isPawn else {
+        guard let (move, piece, _, _, _, _) = _moveHistory.last, piece.kind.isPawn else {
             return nil
         }
         guard abs(move.rankChange) == 2 else {
@@ -427,7 +430,7 @@ public final class Game {
         if considerHalfmoves && halfmoves >= 100 {
             return 0
         }
-        guard let piece = board[square] where piece.color == playerTurn else {
+        guard let piece = board[square], piece.color == playerTurn else {
             return 0
         }
         if kingIsDoubleChecked {
diff --git a/Sources/Square.swift b/Sources/Square.swift
index 2ff3d7d..d207ab9 100644
--- a/Sources/Square.swift
+++ b/Sources/Square.swift
@@ -474,7 +474,7 @@ extension Square {
 
     /// Create a square from `file` and `rank`. Returns `nil` if either is `nil`.
     public init?(file: File?, rank: Rank?) {
-        guard let file = file, rank = rank else {
+        guard let file = file, let rank = rank else {
             return nil
         }
         self.init(file: file, rank: rank)