revert 18dc298, use Path and not T: Path as extension point

There is no benefit in doing so as we don't return T anywhere. It was
misconception on my part that it would be required for invariant places

src/main/kotlin/ch/tutteli/niok/PathDelegateToFiles.kt

@@ -11,115 +11,115 @@ import java.nio.file.attribute.*
 /**
  * Delegates to [Files.copy] with overload for [OutputStream].
  */
-inline fun <T: Path> T.copyTo(outputStream: OutputStream): Long = Files.copy(this, outputStream)
+inline fun Path.copyTo(outputStream: OutputStream): Long = Files.copy(this, outputStream)
 
 /**
  * Delegates to [Files.createDirectory].
  */
-inline fun <T: Path> T.createDirectory(vararg fileAttributes: FileAttribute<*>): Path =
+inline fun Path.createDirectory(vararg fileAttributes: FileAttribute<*>): Path =
     Files.createDirectory(this, *fileAttributes)
 
 /**
  * Delegates to [Files.createDirectories].
  */
-inline fun <T: Path> T.createDirectories(vararg fileAttributes: FileAttribute<*>): Path =
+inline fun Path.createDirectories(vararg fileAttributes: FileAttribute<*>): Path =
     Files.createDirectories(this, *fileAttributes)
 
 /**
  * Delegates to [Files.createFile].
  */
-inline fun <T: Path> T.createFile(vararg fileAttributes: FileAttribute<*>): Path =
+inline fun Path.createFile(vararg fileAttributes: FileAttribute<*>): Path =
     Files.createFile(this, *fileAttributes)
 
 /**
  * Creates a new link (directory entry) for this [Path].
  * Delegates to [Files.createLink].
  */
-inline fun <T: Path> T.createLink(link: Path): Path = Files.createLink(link, this)
+inline fun Path.createLink(link: Path): Path = Files.createLink(link, this)
 
 /**
  * Creates a symbolic link for this [Path].
  * Delegates to [Files.createDirectory].
  */
-inline fun <T: Path> T.createSymbolicLink(link: Path, vararg fileAttributes: FileAttribute<*>): Path =
+inline fun Path.createSymbolicLink(link: Path, vararg fileAttributes: FileAttribute<*>): Path =
     Files.createSymbolicLink(link, this, *fileAttributes)
 
 /**
  * Delegates to [Files.delete].
  */
-inline fun <T: Path> T.delete(): Unit = Files.delete(this)
+inline fun Path.delete(): Unit = Files.delete(this)
 
 /**
  * Delegates to [Files.deleteIfExists].
  */
-inline fun <T: Path> T.deleteIfExists(): Boolean = Files.deleteIfExists(this)
+inline fun Path.deleteIfExists(): Boolean = Files.deleteIfExists(this)
 
 /**
  * Delegates to [Files.exists].
  */
-inline val <T: Path> T.exists get(): Boolean = Files.exists(this)
+inline val Path.exists get(): Boolean = Files.exists(this)
 
 /**
  * Delegates to [Files.isDirectory] without [LinkOption]s.
  */
-inline val <T: Path> T.isDirectory get(): Boolean = Files.isDirectory(this)
+inline val Path.isDirectory get(): Boolean = Files.isDirectory(this)
 
 /**
  * Delegates to [Files.isDirectory].
  */
-inline fun <T: Path> T.isDirectory(linkOption: LinkOption, vararg furtherLinkOptions: LinkOption): Boolean =
+inline fun Path.isDirectory(linkOption: LinkOption, vararg furtherLinkOptions: LinkOption): Boolean =
     Files.isDirectory(this, linkOption, *furtherLinkOptions)
 
 /**
  * Delegates to [Files.isExecutable].
  */
-inline val <T: Path> T.isExecutable get(): Boolean = Files.isExecutable(this)
+inline val Path.isExecutable get(): Boolean = Files.isExecutable(this)
 
 /**
  * Delegates to [Files.isHidden].
  */
-inline val <T: Path> T.isHidden get(): Boolean = Files.isHidden(this)
+inline val Path.isHidden get(): Boolean = Files.isHidden(this)
 
 /**
  * Delegates to [Files.isReadable].
  */
-inline val <T: Path> T.isReadable get(): Boolean = Files.isReadable(this)
+inline val Path.isReadable get(): Boolean = Files.isReadable(this)
 
 /**
  * Delegates to [Files.isRegularFile] without [LinkOption]s.
  */
-inline val <T: Path> T.isRegularFile get(): Boolean = Files.isRegularFile(this)
+inline val Path.isRegularFile get(): Boolean = Files.isRegularFile(this)
 
 /**
  * Delegates to [Files.isRegularFile].
  */
-inline fun <T: Path> T.isRegularFile(linkOption: LinkOption, vararg furtherLinkOptions: LinkOption): Boolean =
+inline fun Path.isRegularFile(linkOption: LinkOption, vararg furtherLinkOptions: LinkOption): Boolean =
     Files.isRegularFile(this, linkOption, *furtherLinkOptions)
 
 /**
  * Delegates to [Files.isSameFile].
  */
-inline fun <T: Path> T.isSameFile(other: Path): Boolean = Files.isSameFile(this, other)
+inline fun Path.isSameFile(other: Path): Boolean = Files.isSameFile(this, other)
 
 /**
  * Delegates to [Files.isSymbolicLink].
  */
-inline val <T: Path> T.isSymbolicLink get(): Boolean = Files.isSymbolicLink(this)
+inline val Path.isSymbolicLink get(): Boolean = Files.isSymbolicLink(this)
 
 /**
  * Delegates to [Files.isWritable].
  */
-inline val <T: Path> T.isWritable get(): Boolean = Files.isWritable(this)
+inline val Path.isWritable get(): Boolean = Files.isWritable(this)
 
 /**
  * Delegates to [Files.getFileStore].
  */
-inline val <T: Path> T.fileStore get(): FileStore = Files.getFileStore(this)
+inline val Path.fileStore get(): FileStore = Files.getFileStore(this)
 
 /**
  * Delegates to [Files.getAttribute].
  */
-inline fun <T: Path> T.getAttribute(attribute: String, vararg linkOptions: LinkOption): Any =
+inline fun Path.getAttribute(attribute: String, vararg linkOptions: LinkOption): Any =
     Files.getAttribute(this, attribute, *linkOptions)
 
 /**
@@ -131,70 +131,70 @@ inline fun <reified V : FileAttributeView> Path.getFileAttributeView(vararg link
 /**
  * Delegates to [Files.getLastModifiedTime] without [LinkOption]s.
  */
-inline val <T: Path> T.lastModifiedTime get(): FileTime = Files.getLastModifiedTime(this)
+inline val Path.lastModifiedTime get(): FileTime = Files.getLastModifiedTime(this)
 
 /**
  * Delegates to [Files.getLastModifiedTime].
  */
-inline fun <T: Path> T.lastModifiedTime(linkOption: LinkOption, vararg furtherLinkOptions: LinkOption): FileTime =
+inline fun Path.lastModifiedTime(linkOption: LinkOption, vararg furtherLinkOptions: LinkOption): FileTime =
     Files.getLastModifiedTime(this, linkOption, *furtherLinkOptions)
 
 /**
  * Delegates to [Files.move].
  */
-inline fun <T: Path> T.move(target: Path, vararg copyOptions: CopyOption): Path =
+inline fun Path.move(target: Path, vararg copyOptions: CopyOption): Path =
     Files.move(this, target, *copyOptions)
 
 /**
  * Delegates to [Files.newByteChannel].
  */
-inline fun <T: Path> T.newByteChannel(vararg openOptions: OpenOption): SeekableByteChannel =
+inline fun Path.newByteChannel(vararg openOptions: OpenOption): SeekableByteChannel =
     Files.newByteChannel(this, *openOptions)
 
 /**
  * Delegates to [Files.newByteChannel].
  */
-inline fun <T: Path> T.newByteChannel(
+inline fun Path.newByteChannel(
     openOptions: Set<OpenOption>,
     vararg fileAttributes: FileAttribute<*>
 ): SeekableByteChannel = Files.newByteChannel(this, openOptions, *fileAttributes)
 
 /**
  * Delegates to [Files.notExists] without [LinkOption]s.
  */
-inline val <T: Path> T.notExists get(): Boolean = Files.notExists(this)
+inline val Path.notExists get(): Boolean = Files.notExists(this)
 
 /**
  * Delegates to [Files.notExists].
  */
-inline fun <T: Path> T.notExists(linkOption: LinkOption, vararg furtherLinkOptions: LinkOption): Boolean =
+inline fun Path.notExists(linkOption: LinkOption, vararg furtherLinkOptions: LinkOption): Boolean =
     Files.notExists(this, linkOption, *furtherLinkOptions)
 
 /**
  * Delegates to [Files.getPosixFilePermissions] without [LinkOption]s.
  */
-inline val <T: Path> T.posixFilePersmissions get(): Set<PosixFilePermission> = Files.getPosixFilePermissions(this)
+inline val Path.posixFilePersmissions get(): Set<PosixFilePermission> = Files.getPosixFilePermissions(this)
 
 /**
  * Delegates to [Files.getPosixFilePermissions].
  */
-inline fun <T: Path> T.posixFilePersmissions(linkOption: LinkOption, vararg furtherLinkOptions: LinkOption) =
+inline fun Path.posixFilePersmissions(linkOption: LinkOption, vararg furtherLinkOptions: LinkOption) =
     Files.getPosixFilePermissions(this, linkOption, *furtherLinkOptions)
 
 /**
  * Delegates to [Files.probeContentType].
  */
-inline fun <T: Path> T.probeContentType(): String = Files.probeContentType(this)
+inline fun Path.probeContentType(): String = Files.probeContentType(this)
 
 /**
  * Delegates to [Files.getLastModifiedTime] without [LinkOption]s.
  */
-inline val <T: Path> T.owner get(): UserPrincipal = Files.getOwner(this)
+inline val Path.owner get(): UserPrincipal = Files.getOwner(this)
 
 /**
  * Delegates to [Files.getLastModifiedTime].
  */
-inline fun <T: Path> T.owner(linkOption: LinkOption, vararg furtherLinkOptions: LinkOption): UserPrincipal =
+inline fun Path.owner(linkOption: LinkOption, vararg furtherLinkOptions: LinkOption): UserPrincipal =
     Files.getOwner(this, linkOption, *furtherLinkOptions)
 
 
@@ -207,39 +207,39 @@ inline fun <reified A : BasicFileAttributes> Path.readAttributes(vararg linkOpti
 /**
  * Delegates to [Files.readAttributes].
  */
-inline fun <T: Path> T.readAttributes(attributes: String, vararg linkOptions: LinkOption): Map<String, Any> =
+inline fun Path.readAttributes(attributes: String, vararg linkOptions: LinkOption): Map<String, Any> =
     Files.readAttributes(this, attributes, *linkOptions)
 
 /**
  * Delegates to [Files.readSymbolicLink].
  */
-inline fun <T: Path> T.readSymbolicLink() = Files.readSymbolicLink(this)
+inline fun Path.readSymbolicLink() = Files.readSymbolicLink(this)
 
 /**
  * Delegates to [Files.setAttribute].
  */
-inline fun <T: Path> T.setAttribute(attribute: String, value: Any, vararg linkOptions: LinkOption) =
+inline fun Path.setAttribute(attribute: String, value: Any, vararg linkOptions: LinkOption) =
     Files.setAttribute(this, attribute, value, *linkOptions)
 
 /**
  * Delegates to [Files.setLastModifiedTime].
  */
-inline fun <T: Path> T.setLastModifiedTime(fileTime: FileTime) = Files.setLastModifiedTime(this, fileTime)
+inline fun Path.setLastModifiedTime(fileTime: FileTime) = Files.setLastModifiedTime(this, fileTime)
 
 /**
  * Delegates to [Files.setPosixFilePermissions].
  */
-inline fun <T: Path> T.setPosixFilePermissions(perms: Set<PosixFilePermission>) = Files.setPosixFilePermissions(this, perms)
+inline fun Path.setPosixFilePermissions(perms: Set<PosixFilePermission>) = Files.setPosixFilePermissions(this, perms)
 
 /**
  * Delegates to [Files.size].
  */
-inline val <T: Path> T.size get(): Long = Files.size(this)
+inline val Path.size get(): Long = Files.size(this)
 
 /**
  * Delegates to [Files.write].
  */
-inline fun <T: Path> T.writeLines(
+inline fun Path.writeLines(
     lines: Iterable<CharSequence>,
     charset: Charset = Charsets.UTF_8,
     vararg openOptions: OpenOption

src/main/kotlin/ch/tutteli/niok/PathDelegateToFilesInsteadOfKotlinFile.kt

@@ -15,51 +15,51 @@ import java.nio.file.Path
 /**
  * Delegates to [Files.newBufferedReader].
  */
-inline fun <T: Path> T.newBufferedReader(charset: Charset = Charsets.UTF_8): BufferedReader =
+inline fun Path.newBufferedReader(charset: Charset = Charsets.UTF_8): BufferedReader =
     Files.newBufferedReader(this, charset)
 
 /**
  * Delegates to [Files.newBufferedWriter].
  */
-inline fun <T: Path> T.newBufferedWriter(charset: Charset = Charsets.UTF_8, vararg openOptions: OpenOption): BufferedWriter =
+inline fun Path.newBufferedWriter(charset: Charset = Charsets.UTF_8, vararg openOptions: OpenOption): BufferedWriter =
     Files.newBufferedWriter(this, charset, *openOptions)
 
 /**
  * Delegates to [Files.copy].
  */
-inline fun <T: Path> T.copyTo(target: Path, vararg copyOptions: CopyOption): Path =
+inline fun Path.copyTo(target: Path, vararg copyOptions: CopyOption): Path =
     Files.copy(this, target, *copyOptions)
 
 /**
  * Delegates to [Files.newInputStream].
  */
-inline fun <T: Path> T.newInputStream(vararg openOptions: OpenOption): InputStream =
+inline fun Path.newInputStream(vararg openOptions: OpenOption): InputStream =
     Files.newInputStream(this, *openOptions)
 
 /**
  * Delegates to [Files.newOutputStream].
  */
-inline fun <T: Path> T.newOutputStream(vararg openOptions: OpenOption): OutputStream =
+inline fun Path.newOutputStream(vararg openOptions: OpenOption): OutputStream =
     Files.newOutputStream(this, *openOptions)
 
 /**
  * Delegates to [Files.readAllBytes].
  */
-inline fun <T: Path> T.readAllBytes(): ByteArray = Files.readAllBytes(this)
+inline fun Path.readAllBytes(): ByteArray = Files.readAllBytes(this)
 
 /**
  * Delegates to [Files.readAllLines].
  */
-inline fun <T: Path> T.readAllLines(charset: Charset = Charsets.UTF_8): List<String> = Files.readAllLines(this, charset)
+inline fun Path.readAllLines(charset: Charset = Charsets.UTF_8): List<String> = Files.readAllLines(this, charset)
 
 /**
  * Converts [Path.readAllBytes] to a string using the given [charset].
  */
-inline fun <T: Path> T.readText(charset: Charset = Charsets.UTF_8): String =
+inline fun Path.readText(charset: Charset = Charsets.UTF_8): String =
     readAllBytes().toString(charset)
 
 /**
  * Delegates to [Files.write].
  */
-inline fun <T: Path> T.writeBytes(array: ByteArray, vararg openOptions: OpenOption): Path =
+inline fun Path.writeBytes(array: ByteArray, vararg openOptions: OpenOption): Path =
     Files.write(this, array, *openOptions)