Merge pull request #107 from t089/span

Adds initializers to support parsing JSON directly from a Span.

Author: tayloraswift

Sources/JSONParsing/JSON.Array (ext).swift

@@ -6,6 +6,14 @@ extension JSON.Array {
     public init(parsing json: JSON) throws {
         self.init(try JSON.NodeRule<Int>.Array.parse(json.utf8))
     }
+    /// Attempts to parse a JSON array from a raw span
+    public init(parsing span: RawSpan) throws {
+        self.init(
+            try span.withUnsafeBytes { buffer in
+                try JSON.NodeRule<Int>.Array.parse(buffer)
+            }
+        )
+    }
     /// Attempts to parse a JSON array from a string.
     public init(parsing string: String) throws {
         self.init(try JSON.NodeRule<String.Index>.Array.parse(string.utf8))

Sources/JSONParsing/JSON.Node (ext).swift

@@ -8,6 +8,13 @@ extension JSON.Node {
         self = try JSON.RootRule<Int>.parse(json.utf8)
     }
     /// Attempts to parse a complete JSON message (either an ``Array`` or an
+    /// ``Object``) from a raw span.
+    public init(parsing span: RawSpan) throws {
+        self = try span.withUnsafeBytes { buffer in
+            try JSON.RootRule<Int>.parse(buffer)
+        }
+    }
+    /// Attempts to parse a complete JSON message (either an ``Array`` or an
     /// ``Object``) from a string.
     public init(parsing string: String) throws {
         self = try JSON.RootRule<String.Index>.parse(string.utf8)

Sources/JSONParsing/JSON.Object (ext).swift

@@ -9,6 +9,14 @@ extension JSON.Object {
     public init(parsing json: JSON) throws {
         self.init(try JSON.NodeRule<Int>.Object.parse(json.utf8))
     }
+    /// Attempts to parse a JSON object from a raw span.
+    public init(parsing span: RawSpan) throws {
+        self.init(
+            try span.withUnsafeBytes { buffer in
+                try JSON.NodeRule<Int>.Object.parse(buffer)
+            }
+        )
+    }
     /// Attempts to parse a JSON object from a string.
     ///
     /// >   Note: