Introduce SourceFile that stores the path and content text of a sourc…

…e code file

Package.swift

@@ -19,11 +19,33 @@ import PackageDescription
 let package = Package(
     name: "swift-ast",
     targets: [
-        Target(name: "ast", dependencies: [.Target(name: "util")]),
-        Target(name: "parser", dependencies: [.Target(name: "util"), .Target(name: "ast")]),
-        Target(name: "swift-ast", dependencies: [.Target(name: "parser")]),
+        Target(
+            name: "source"
+        ),
+        Target(
+            name: "ast",
+            dependencies: [
+                .Target(name: "util"),
+                .Target(name: "source"),
+            ]
+        ),
+        Target(
+            name: "parser",
+            dependencies: [
+                .Target(name: "util"),
+                .Target(name: "source"),
+                .Target(name: "ast"),
+            ]
+        ),
+        Target(
+            name: "swift-ast",
+            dependencies: [
+                .Target(name: "source"),
+                .Target(name: "parser"),
+            ]
+        ),
     ],
     testDependencies: [
-        .Package(url: "https://github.com/kylef/Spectre.git", majorVersion: 0)
+        .Package(url: "https://github.com/kylef/Spectre.git", majorVersion: 0),
     ]
 )

Sources/source/SourceFile.swift

@@ -0,0 +1,22 @@
+/*
+   Copyright 2015 Ryuichi Saito, LLC
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+// Merry Christmas 2015! -Ryuichi
+
+public struct SourceFile {
+   let path: String
+   let content: String
+}