Rename SerialSequenceExecutor (#23)

Renames `SerialSequenceExecutor` to `ImmediateSerialSequenceExecutor` to better represent the execution is done immediately on the caller thread, since a `ConcurrentSequenceExecutor` limited to a maximum concurrency level of 1 would also be serial.

Author: neakor

Concurrency.xcodeproj/project.pbxproj

@@ -7,7 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		41B94843210A4744007E59C8 /* SerialSequenceExecutor.swift in Sources */ = {isa = PBXBuildFile; fileRef = 41B9483F210A4744007E59C8 /* SerialSequenceExecutor.swift */; };
+		41B94843210A4744007E59C8 /* ImmediateSerialSequenceExecutor.swift in Sources */ = {isa = PBXBuildFile; fileRef = 41B9483F210A4744007E59C8 /* ImmediateSerialSequenceExecutor.swift */; };
 		41B94844210A4744007E59C8 /* SequenceExecutor.swift in Sources */ = {isa = PBXBuildFile; fileRef = 41B94840210A4744007E59C8 /* SequenceExecutor.swift */; };
 		41B94845210A4744007E59C8 /* ConcurrentSequenceExecutor.swift in Sources */ = {isa = PBXBuildFile; fileRef = 41B94841210A4744007E59C8 /* ConcurrentSequenceExecutor.swift */; };
 		41B94846210A4744007E59C8 /* Task.swift in Sources */ = {isa = PBXBuildFile; fileRef = 41B94842210A4744007E59C8 /* Task.swift */; };
@@ -34,7 +34,7 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
-		41B9483F210A4744007E59C8 /* SerialSequenceExecutor.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = SerialSequenceExecutor.swift; sourceTree = "<group>"; };
+		41B9483F210A4744007E59C8 /* ImmediateSerialSequenceExecutor.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ImmediateSerialSequenceExecutor.swift; sourceTree = "<group>"; };
 		41B94840210A4744007E59C8 /* SequenceExecutor.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = SequenceExecutor.swift; sourceTree = "<group>"; };
 		41B94841210A4744007E59C8 /* ConcurrentSequenceExecutor.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ConcurrentSequenceExecutor.swift; sourceTree = "<group>"; };
 		41B94842210A4744007E59C8 /* Task.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Task.swift; sourceTree = "<group>"; };
@@ -74,7 +74,7 @@
 		41B9483E210A4744007E59C8 /* Executor */ = {
 			isa = PBXGroup;
 			children = (
-				41B9483F210A4744007E59C8 /* SerialSequenceExecutor.swift */,
+				41B9483F210A4744007E59C8 /* ImmediateSerialSequenceExecutor.swift */,
 				41B94840210A4744007E59C8 /* SequenceExecutor.swift */,
 				41B94841210A4744007E59C8 /* ConcurrentSequenceExecutor.swift */,
 				41B94842210A4744007E59C8 /* Task.swift */,
@@ -224,7 +224,7 @@
 				41B94845210A4744007E59C8 /* ConcurrentSequenceExecutor.swift in Sources */,
 				OBJ_28 /* AtomicInt.swift in Sources */,
 				OBJ_29 /* AtomicReference.swift in Sources */,
-				41B94843210A4744007E59C8 /* SerialSequenceExecutor.swift in Sources */,
+				41B94843210A4744007E59C8 /* ImmediateSerialSequenceExecutor.swift in Sources */,
 				OBJ_30 /* CountDownLatch.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

Sources/Concurrency/Executor/SerialSequenceExecutor.swift renamed to Sources/Concurrency/Executor/ImmediateSerialSequenceExecutor.swift

@@ -17,20 +17,20 @@
 import Foundation
 
 /// An executor that executes sequences of tasks serially from the
-/// caller thread.
+/// caller thread as soon as the execute method is invoked.
 ///
 /// - note: Generally this implementation should only be used for debugging
 /// purposes, as debugging highly concurrent task executions can be very
 /// challenging. Production code should use `ConcurrentSequenceExecutor`.
 /// - seeAlso: `SequenceExecutor`.
 /// - seeAlso: `Task`.
-public class SerialSequenceExecutor: SequenceExecutor {
+public class ImmediateSerialSequenceExecutor: SequenceExecutor {
 
     /// Initializer.
     public init() {}
 
     /// Execute a sequence of tasks serially from the given initial task
-    /// on the caller thread.
+    /// on the caller thread, immediately.
     ///
     /// - parameter initialTask: The root task of the sequence of tasks
     /// to be executed.