Add operator |>> for printing anything to a writable stream.

Replaced all uses of writeTo with the new operator in unit tests, test scripts and readme.

README.md

@@ -24,7 +24,7 @@ print( "The time and date is " + $("date -u") )
 #### Pipe several commands together
 
 ```swift
-run("echo piped to the next command") |> run("wc -w") |> writeTo(standardoutput) 
+run("echo piped to the next command") |> run("wc -w") |>> standardoutput
 ```
 
 #### Read a file line by line
@@ -40,7 +40,7 @@ for line in open(filename).lines() {
 ```swift
 let directories = environment["PATH"]!.split(":")
 for directory in directories {
-	run("find \"\(directory)\" -type f -perm +ugo+x -print") |> writeTo(standardoutput)
+	run("find \"\(directory)\" -type f -perm +ugo+x -print") |>> standardoutput
 }
 ```
 
@@ -49,7 +49,7 @@ or more Functionally:
 ```swift
 environment["PATH"]! |> split(":") 
 	|> map { dir in run("find \"\(dir)\" -type f -perm +ugo+x -print") } 
-	|> writeTo(standardoutput)
+	|>> standardoutput
 ```
 
 #### Print standard input with line numbers

SwiftShell/Stream.swift

@@ -142,6 +142,7 @@ public func split (delimiter: String = "\n")(stream: ReadableStreamType) -> Sequ
 	return SequenceOf({StringStreamGenerator (stream: stream, delimiter: delimiter)})
 }
 
+
 /**
 Write something to a stream.
 
@@ -151,7 +152,6 @@ public func writeTo <T>(stream: WriteableStreamType)(input: T) {
 	stream.write( toString(input) )
 }
 
-// needed to avoid `write(SequenceType)` being called instead,
 // needed to avoid `writeTo(SequenceType)` being called instead,
 // treating the string as a sequence of characters.
 /** Write a String to a writable stream. */
@@ -165,3 +165,26 @@ public func writeTo <S : SequenceType>(stream: WriteableStreamType)(seq: S) {
 		item |> writeTo(stream)
 	}
 }
+
+infix operator |>> { precedence 50 associativity left }
+
+/**
+Write something to a stream.
+
+something |>> writablestream
+*/
+public func |>> <T>(input: T, stream: WriteableStreamType) {
+	writeTo(stream)(input: input)
+}
+
+// needed to avoid `func |>> <S : SequenceType>` being called instead,
+// treating the string as a sequence of characters.
+/** Write a String to a writable stream. */
+public func |>> (text: String, stream: WriteableStreamType) {
+	writeTo(stream)(input: text)
+}
+
+/** Write a sequence to a stream. */
+public func |>> <S : SequenceType>(seq: S, stream: WriteableStreamType) {
+	writeTo(stream)(seq: seq)
+}

SwiftShellTests/Scripts/callswiftscriptfromswift.swift

@@ -2,4 +2,4 @@
 
 import SwiftShell
 
-run("cat onetwothree.txt") |> run("./print_linenumbers.swift") |> writeTo(standardoutput) 
+run("cat onetwothree.txt") |> run("./print_linenumbers.swift") |>> standardoutput

SwiftShellTests/Scripts/print_linenumbers.swift

@@ -11,4 +11,4 @@ for line in standardinput.lines() {
 */
 
 var i = 1
-standardinput.lines() |> map {line in "line \(i++): \(line)\n"} |> writeTo(standardoutput)
+standardinput.lines() |> map {line in "line \(i++): \(line)\n"} |>> standardoutput

SwiftShellTests/Scripts/stream_out.swift

@@ -2,4 +2,4 @@
 
 import SwiftShell
 
-run("echo this is streamed") |> run("wc -w") |> writeTo(standardoutput) 
+run("echo this is streamed") |> run("wc -w") |>> standardoutput

SwiftShellTests/Stream_Tests.swift

@@ -38,7 +38,7 @@ class Stream_Tests: XCTestCase {
 	func testPrintStreamToStream () {
 		var (writable, readable) = streams()
 		
-		stream("this goes in") |> writeTo(writable)
+		stream("this goes in") |>> writable
 		
 		XCTAssertEqual( readable.readSome()!, "this goes in")
 	}
@@ -46,7 +46,7 @@ class Stream_Tests: XCTestCase {
 	func testPrintStreamToStreamInPieces () {
 		var (writable, readable) = streams()
 		
-		stream(["this ", "goes", " in"]) |> writeTo(writable)
+		stream(["this ", "goes", " in"]) |>> writable
 		
 		writable.closeStream()
 		XCTAssertEqual( readable.read(), "this goes in")
@@ -55,7 +55,7 @@ class Stream_Tests: XCTestCase {
 	func testPrintStringToStream () {
 		var (writable, readable) = streams()
 		
-		"this goes in" |> writeTo(writable)
+		"this goes in" |>> writable
 		
 		XCTAssertEqual( readable.readSome()!, "this goes in")
 	}
@@ -63,7 +63,7 @@ class Stream_Tests: XCTestCase {
 	func testCommandChainToStream () {
 		var (writable, readable) = streams()
 		
-		SwiftShell.run("echo this is streamed") |> SwiftShell.run("wc -w") |> writeTo(writable)
+		SwiftShell.run("echo this is streamed") |> SwiftShell.run("wc -w") |>> writable
 		
 		XCTAssertEqual( readable.readSome()!.trim(), "3")
 	}
@@ -72,7 +72,7 @@ class Stream_Tests: XCTestCase {
 		var (writable, readable) = streams()
 		
 		// make sure the array isn't printed as a Printable.
-		SequenceOf([stream("line 1"), stream("line 2"), stream("line 3")].generate()) |> writeTo(writable)
+		SequenceOf([stream("line 1"), stream("line 2"), stream("line 3")].generate()) |>> writable
 		
 		XCTAssertEqual( readable.readSome()!.trim(), "line 1line 2line 3")
 	}
@@ -83,7 +83,7 @@ class Stream_Tests: XCTestCase {
 		
 		dict["test"]! |> split(":") 
 			|> map { line in SwiftShell.run("echo \(line)") } 
-			|> writeTo(writable)
+			|>> writable
 
 		XCTAssertEqual( readable.readSome()!.trim(), "line 1\nline 2\nline 3")
 	}
@@ -92,7 +92,7 @@ class Stream_Tests: XCTestCase {
 		var (writable, readable) = streams()
 		var i = 1
 		
-		stream("line 1\nline 2\nline 3").lines() |> map {line in "line \(i++): \(line)\n"} |> writeTo(writable)
+		stream("line 1\nline 2\nline 3").lines() |> map {line in "line \(i++): \(line)\n"} |>> writable
 		
 		XCTAssertEqual( readable.readSome()!.trim(), "line 1: line 1\nline 2: line 2\nline 3: line 3")
 	}