Update dependencies to RAC 4 RC 2

Cartfile

@@ -1 +1 @@
-github "ReactiveCocoa/ReactiveCocoa" "v4.0.0-RC.1"
+github "ReactiveCocoa/ReactiveCocoa" "v4.0.0-RC.2"

Cartfile.resolved

@@ -1,2 +1,2 @@
 github "antitypical/Result" "1.0.1"
-github "ReactiveCocoa/ReactiveCocoa" "v4.0.0-RC.1"
+github "ReactiveCocoa/ReactiveCocoa" "v4.0.0-RC.2"

Source/Property.swift

@@ -50,6 +50,13 @@ public struct AndProperty: PropertyType {
         }
     }
 
+    public var signal: Signal<Bool, NoError> {
+        let signals = terms.map { $0.signal }
+        return combineLatest(signals).map { values in
+            return values.reduce(true) { $0 && $1 }
+        }
+    }
+
     /// Creates a new property with an additional conjunctive term.
     public func and<P : PropertyType where P.Value == Bool>(other: P) -> AndProperty {
         return AndProperty(terms: terms + [AnyProperty(other)])
@@ -80,6 +87,13 @@ public struct OrProperty: PropertyType {
         }
     }
 
+    public var signal: Signal<Bool, NoError> {
+        let signals = terms.map { $0.signal }
+        return combineLatest(signals).map { values in
+            return values.reduce(false) { $0 || $1 }
+        }
+    }
+
     /// Creates a new property with an additional disjunctive term.
     public func or<P : PropertyType where P.Value == Bool>(other: P) -> OrProperty {
         return OrProperty(terms: terms + [AnyProperty(other)])
@@ -108,6 +122,10 @@ public struct NotProperty: PropertyType {
         return source.producer.map { $0 != self.invert }
     }
 
+    public var signal: Signal<Bool, NoError> {
+        return source.signal.map { $0 != self.invert }
+    }
+
     /// A negated property of `self`.
     public func not() -> NotProperty {
         return NotProperty(source: source, invert: !invert)

Source/SignalProducer.swift

@@ -26,7 +26,7 @@ extension SignalProducerType {
                 lock.lock()
                 var group = groups[key]
                 if group == nil {
-                    let (producer, sink) = SignalProducer<Value, Error>.buffer()
+                    let (producer, sink) = SignalProducer<Value, Error>.buffer(Int.max)
                     observer.sendNext(key, producer)
 
                     groups[key] = sink

Tests/SignalProducerTests.swift

@@ -13,7 +13,7 @@ import XCTest
 final class SignalProducerTests: XCTestCase {
 
     func testGroupBy() {
-        let (producer, sink) = SignalProducer<Int, NoError>.buffer()
+        let (producer, sink) = SignalProducer<Int, NoError>.buffer(Int.max)
         var evens: [Int] = []
         var odds: [Int] = []
         let disposable = CompositeDisposable()