add test files

2012-02-27 21:55:57 +04:00
parent 645a3a9f2f
commit c21ea8aa86
240 changed files with 16998 additions and 0 deletions
@@ -0,0 +1,60 @@
+package std
+
+import java.util.*
+import java.lang.Iterable
+
+/*
+Filters given iterator
+*/
+inline fun <T> java.util.Iterator<T>.filter(f: (T)-> Boolean) : java.util.Iterator<T> = FilterIterator<T>(this, f)
+
+/*
+Adds filtered elements in to given container
+*/
+inline fun <T,U : Collection<in T>> java.lang.Iterable<T>.filterTo(var container: U, filter: (T)->Boolean) : U {
+   for(element in this) {
+      if(filter(element))
+        container.add(element)
+   }
+   return container
+}
+
+/*
+Create iterator filtering given java.lang.Iterable
+*/
+/*
+inline fun <T> java.lang.Iterable<T>.filter(f: (T)->Boolean) : java.util.Iterator<T> = (iterator() as java.util.Iterator<T>).filter(f)
+*/
+
+private class FilterIterator<T>(val original: java.util.Iterator<T>, val filter: (T)-> Boolean) : java.util.Iterator<T> {
+    var state = 0
+    var nextElement: T? = null
+
+    override fun hasNext(): Boolean =
+        when(state) {
+                1 -> true  // checked and next present
+                2 -> false // checked and next not present
+                else -> {
+                    while(original.hasNext()) {
+                        val candidate = original.next()
+                        if((filter)(candidate)) {
+                            nextElement = candidate
+                            state = 1
+                            true
+                        }
+                    }
+                    state = 2
+                    false
+                }
+        }
+
+    override fun next(): T =
+        if(state != 1)
+            throw java.util.NoSuchElementException()
+        else {
+            val res = nextElement as T
+            nextElement = null
+            state = 0
+            res
+        }
+}