1 files changed, 17 insertions, 0 deletions
diff --git a/java/src/main/java/io/trygvis/ld/CollectingErrorListener.java b/java/src/main/java/io/trygvis/ld/CollectingErrorListener.java
new file mode 100644
index 0000000..968a02b
--- /dev/null
+++ b/java/src/main/java/io/trygvis/ld/CollectingErrorListener.java
@@ -0,0 +1,17 @@
+package io.trygvis.ld;
+
+import org.antlr.v4.runtime.BaseErrorListener;
+import org.antlr.v4.runtime.RecognitionException;
+import org.antlr.v4.runtime.Recognizer;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class CollectingErrorListener extends BaseErrorListener {
+    public final List<String> errors = new ArrayList<>();
+
+    public void syntaxError(Recognizer<?, ?> recognizer, Object offendingSymbol, int line, int charPositionInLine, String msg, RecognitionException e) {
+        String s = line + ":" + charPositionInLine + " " + msg;
+        errors.add(s);
+    }
+}