Add @Generator annotation

AUTHORS

@@ -54,5 +54,6 @@ Till Brychcy <[email protected]>
 Victor Williams Stafusa da Silva <[email protected]>
 Yonatan Sherwin <[email protected]>
 Yun Zhi Lin <[email protected]>
+Yoon Tae Min <[email protected]>
 
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src/core/lombok/ConfigurationKeys.java

@@ -651,6 +651,14 @@ private ConfigurationKeys() {}
 	 */
 	public static final ConfigurationKey<FlagUsageType> FIELD_NAME_CONSTANTS_FLAG_USAGE = new ConfigurationKey<FlagUsageType>("lombok.fieldNameConstants.flagUsage", "Emit a warning or error if @FieldNameConstants is used.") {};
 
+	// ----- Generator -----
+	/**
+	 * lombok configuration: {@code lombok.generator.flagUsage} = {@code WARNING} | {@code ERROR}.
+	 * 
+	 * If set, <em>any</em> usage of {@code @Generator} results in a warning / error.
+	 */
+	public static final ConfigurationKey<FlagUsageType> GENERATOR_FLAG_USAGE = new ConfigurationKey<FlagUsageType>("lombok.generator.flagUsage", "Emit a warning or error if @Generator is used.") {};
+
 	/**
 	 * lombok configuration: {@code lombok.fieldNameConstants.innerTypeName} = &lt;String: AValidJavaTypeName&gt; (Default: {@code Fields}).
 	 * 

src/core/lombok/Lombok.java

@@ -21,6 +21,8 @@
  */
 package lombok;
 
+import java.util.Iterator;
+
 /**
  * Useful utility methods to manipulate lombok-generated code.
  */
@@ -82,4 +84,39 @@ public static <T> T checkNotNull(T value, String message) {
 		if (value == null) throw new NullPointerException(message);
 		return value;
 	}
+
+	/**
+	 * Stub class for {@code GeneratorPostTransformation}
+	 */
+	public static abstract class Generator<T> implements Iterable<T>, Iterator<T> {
+
+		protected abstract void advance();
+
+		protected final void yieldThis(T target) {
+			throw new UnsupportedOperationException("Unimplemented method 'yieldThis'");
+		}
+
+		protected final void yieldAll(Iterable<T> target) {
+			throw new UnsupportedOperationException("Unimplemented method 'yieldAll'");
+		}
+		protected final void yieldAll(T[] target) {
+			throw new UnsupportedOperationException("Unimplemented method 'yieldAll'");
+		}
+
+		@Override public boolean hasNext() {
+			throw new UnsupportedOperationException("Unimplemented method 'hasNext'");
+		}
+
+		@Override public T next() {
+			throw new UnsupportedOperationException("Unimplemented method 'next'");
+		}
+
+		@Override public Iterator<T> iterator() {
+			throw new UnsupportedOperationException("Unimplemented method 'iterator'");
+		}
+
+		@Override public void remove() {
+			throw new UnsupportedOperationException("Unimplemented method 'remove'");
+		}
+	}
 }