Introduce PerceptionCore module (#105)

Downstream libraries can avoid the overhead of swift-syntax and macros
if they depend on `PerceptionCore` instead.

Package.resolved

@@ -5,35 +5,35 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/pointfreeco/swift-macro-testing",
       "state" : {
-        "revision" : "a35257b7e9ce44e92636447003a8eeefb77b145c",
-        "version" : "0.5.1"
+        "revision" : "20c1a8f3b624fb5d1503eadcaa84743050c350f4",
+        "version" : "0.5.2"
       }
     },
     {
       "identity" : "swift-snapshot-testing",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/pointfreeco/swift-snapshot-testing",
       "state" : {
-        "revision" : "c097f955b4e724690f0fc8ffb7a6d4b881c9c4e3",
-        "version" : "1.17.2"
+        "revision" : "42a086182681cf661f5c47c9b7dc3931de18c6d7",
+        "version" : "1.17.6"
       }
     },
     {
       "identity" : "swift-syntax",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/swiftlang/swift-syntax",
       "state" : {
-        "revision" : "4c6cc0a3b9e8f14b3ae2307c5ccae4de6167ac2c",
-        "version" : "600.0.0-prerelease-2024-06-12"
+        "revision" : "0687f71944021d616d34d922343dcef086855920",
+        "version" : "600.0.1"
       }
     },
     {
       "identity" : "xctest-dynamic-overlay",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/pointfreeco/xctest-dynamic-overlay",
       "state" : {
-        "revision" : "357ca1e5dd31f613a1d43320870ebc219386a495",
-        "version" : "1.2.2"
+        "revision" : "770f990d3e4eececb57ac04a6076e22f8c97daeb",
+        "version" : "1.4.2"
       }
     }
   ],

Package.swift

@@ -12,7 +12,8 @@ let package = Package(
     .watchOS(.v6),
   ],
   products: [
-    .library(name: "Perception", targets: ["Perception"])
+    .library(name: "Perception", targets: ["Perception"]),
+    .library(name: "PerceptionCore", targets: ["PerceptionCore"]),
   ],
   dependencies: [
     .package(url: "https://github.com/pointfreeco/swift-macro-testing", from: "0.1.0"),
@@ -22,6 +23,13 @@ let package = Package(
   targets: [
     .target(
       name: "Perception",
+      dependencies: [
+        "PerceptionCore",
+        "PerceptionMacros",
+      ]
+    ),
+    .target(
+      name: "PerceptionCore",
       dependencies: [
         "PerceptionMacros",
         .product(name: "IssueReporting", package: "xctest-dynamic-overlay"),

Sources/Perception/Exports.swift

@@ -0,0 +1 @@
+@_exported import PerceptionCore

Sources/Perception/PerceptionRegistrar.swift → Sources/PerceptionCore/PerceptionRegistrar.swift

@@ -22,7 +22,7 @@ public struct PerceptionRegistrar: Sendable {
   /// ``PerceptionRegistrar`` when using the
   /// ``Perception/Perceptible()`` macro to indicate observably
   /// of a type.
-  public init(isPerceptionCheckingEnabled: Bool = Perception.isPerceptionCheckingEnabled) {
+  public init(isPerceptionCheckingEnabled: Bool = PerceptionCore.isPerceptionCheckingEnabled) {
     if #available(iOS 17, macOS 14, tvOS 17, watchOS 10, *), !isObservationBeta {
       self._rawValue = AnySendable(ObservationRegistrar())
     } else {
@@ -199,7 +199,7 @@ extension PerceptionRegistrar: Hashable {
       column: UInt
     ) {
       if self.isPerceptionCheckingEnabled,
-        Perception.isPerceptionCheckingEnabled,
+        PerceptionCore.isPerceptionCheckingEnabled,
         !_PerceptionLocals.isInPerceptionTracking,
         !_PerceptionLocals.skipPerceptionChecking,
         self.isInSwiftUIBody(file: filePath, line: line)