Merge pull request #14 from neonailol/5

#5 - Port Func interface across platforms

kactoos-common/src/main/kotlin/nnl/rocks/kactoos/Aliases.kt

@@ -23,3 +23,9 @@ internal typealias KText = () -> String
      * @since 0.2
      */
 internal typealias KBiFunc<X, Y, Z> = (X, Y) -> Z
+
+    /**
+     * Alias for [Func]
+     * @since 0.2
+     */
+internal typealias KFunc<X, Y> = (X) -> Y

kactoos-common/src/main/kotlin/nnl/rocks/kactoos/Func.kt

@@ -0,0 +1,18 @@
+package nnl.rocks.kactoos
+
+/**
+ * Function.
+ *
+ * @since 0.2
+ */
+expect interface Func<in X : Any, out Y : Any> {
+
+    /**
+     * Apply it.
+     *
+     * @param input The argument
+     * @return The result of type [Y]
+     * @since 0.2
+     */
+    fun apply(input: X): Y
+}

kactoos-js/src/main/kotlin/nnl/rocks/kactoos/Func.kt

@@ -0,0 +1,18 @@
+package nnl.rocks.kactoos
+
+/**
+ * Function.
+ *
+ * @since 0.2
+ */
+actual interface Func<in X : Any, out Y : Any> {
+
+    /**
+     * Apply it.
+     *
+     * @param input The argument
+     * @return The result of type [Y]
+     * @since 0.2
+     */
+    actual fun apply(input: X): Y
+}

kactoos-jvm/src/main/kotlin/nnl/rocks/kactoos/Func.kt

@@ -20,19 +20,17 @@ package nnl.rocks.kactoos
  * @see nnl.rocks.kactoos.func.UncheckedFunc
  * @see nnl.rocks.kactoos.func.IoCheckedFunc
  *
- * @since 0.1
+ * @since 0.2
  */
 @FunctionalInterface
-interface Func<in X : Any, out Y : Any> {
+actual interface Func<in X : Any, out Y : Any> {
 
     /**
      * Apply it.
      * @param input The argument
-     * @return The result
+     * @return The result of type [Y]
      * @throws Exception If fails
      */
     @Throws(Exception::class)
-    fun apply(input: X): Y
+    actual fun apply(input: X): Y
 }
-
-internal typealias KFunc<X, Y> = (X) -> Y

kactoos-native/src/main/kotlin/nnl/rocks/kactoos/Func.kt

@@ -0,0 +1,18 @@
+package nnl.rocks.kactoos
+
+/**
+ * Function.
+ *
+ * @since 0.2
+ */
+actual interface Func<in X : Any, out Y : Any> {
+
+    /**
+     * Apply it.
+     *
+     * @param input The argument
+     * @return The result of type [Y]
+     * @since 0.2
+     */
+    actual fun apply(input: X): Y
+}