Fix corner case for Opcode

Author: blindpirate

plugin/core/src/main/java/com/perl5/lang/perl/psi/mixins/PerlNamespaceDefinitionMixin.java

@@ -251,9 +251,23 @@ public class ExporterInfo implements Processor<PsiElement> {
     private final @NotNull List<String> EXPORT_OK = new ArrayList<>();
     private final @NotNull Map<String, List<String>> EXPORT_TAGS = Collections.emptyMap();
 
+    // Deals with the following cases:
+    // use subs our @EXPORT_OK = qw( a b c );
+    public PsiElement findAssignExpr(PsiElement element) {
+      PsiElement target = element.getFirstChild();
+      while (target != null && !(target instanceof PsiPerlAssignExpr)) {
+        target = target.getNextSibling();
+      }
+      return target;
+    }
+
     public void extractExport(PsiElement element, String exportName, List<String> target) {
-      PsiElement rightSide = element.getFirstChild().getLastChild();
-      String variableName = element.getFirstChild().getFirstChild().getText();
+      PsiElement assignExpr = findAssignExpr(element);
+      PsiElement leftSide = assignExpr.getFirstChild();
+      PsiElement rightSide = assignExpr.getLastChild();
+      String variableName = leftSide instanceof PerlVariableDeclarationExpr ?
+        leftSide.getLastChild().getText() :
+        leftSide.getText();
 
       // @EXPORT or @{namespace}::EXPORT
       // @EXPORT_OK or @{namespace}::EXPORT_OK

plugin/src/test/java/unit/perl/ExporterTest.java

@@ -34,6 +34,7 @@ protected String getBaseDataPath() {
   public void testExport() {
     doTest("export.pl", "Foo", new String[]{"this", "is", "the", "end"}, new String[]{});
     doTest("boolean.pl", "boolean", new String[]{"true", "false", "boolean"}, new String[]{"isTrue", "isFalse", "isBoolean"});
+    doTest("Opcode.pm", "Opcode", new String[]{}, new String[]{"opset", "opset_to_hex", "opdump"});
   }
 
   @Test

plugin/src/test/resources/unit/perl/exporter/Opcode.pm

@@ -0,0 +1,14 @@
+package Opcode 1.64;
+
+use strict;
+
+use Carp;
+use Exporter 'import';
+use XSLoader;
+
+sub opset (;@);
+sub opset_to_hex ($);
+sub opdump (;$);
+use subs our @EXPORT_OK = qw(
+        opset opset_to_hex opdump
+);