1 files changed, 27 insertions, 0 deletions
diff --git a/javaparser-core/src/main/java/com/github/javaparser/ast/validator/chunks/UnderscoreKeywordValidator.java b/javaparser-core/src/main/java/com/github/javaparser/ast/validator/chunks/UnderscoreKeywordValidator.java
new file mode 100644
index 000000000..e812597bb
--- /dev/null
+++ b/javaparser-core/src/main/java/com/github/javaparser/ast/validator/chunks/UnderscoreKeywordValidator.java
@@ -0,0 +1,27 @@
+package com.github.javaparser.ast.validator.chunks;
+
+import com.github.javaparser.ast.Node;
+import com.github.javaparser.ast.expr.Name;
+import com.github.javaparser.ast.expr.SimpleName;
+import com.github.javaparser.ast.validator.ProblemReporter;
+import com.github.javaparser.ast.validator.VisitorValidator;
+
+public class UnderscoreKeywordValidator extends VisitorValidator {
+    @Override
+    public void visit(Name n, ProblemReporter arg) {
+        validateIdentifier(n, n.getIdentifier(), arg);
+        super.visit(n, arg);
+    }
+
+    @Override
+    public void visit(SimpleName n, ProblemReporter arg) {
+        validateIdentifier(n, n.getIdentifier(), arg);
+        super.visit(n, arg);
+    }
+
+    private static void validateIdentifier(Node n, String id, ProblemReporter arg) {
+        if (id.equals("_")) {
+            arg.report(n, "'_' is a reserved keyword.");
+        }
+    }
+}