range literals initial

stdlib/src/jet/IntRange.java

@@ -0,0 +1,20 @@
+package jet;
+
+public class IntRange implements Range<Integer> {
+    private final int startValue;
+    private final int endValue;
+
+    public IntRange(int startValue, int endValue) {
+        this.startValue = startValue;
+        this.endValue = endValue;
+    }
+
+    @Override
+    public boolean contains(Integer item) {
+        if (item == null) return false;
+        if (startValue <= endValue) {
+            return item >= startValue && item <= endValue;
+        }
+        return item <= startValue && item >= endValue;
+    }
+}

stdlib/src/jet/Range.java

@@ -0,0 +1,5 @@
+package jet;
+
+public interface Range<T extends Comparable<T>> {
+    boolean contains(T item);
+}

stdlib/stdlib.iml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
+