Allow repeated fields within option values.

Change-Id: I2ba5c813e12b2f004bfcbe07a30605d5796b1442

com.google.eclipse.protobuf.ui/src/com/google/eclipse/protobuf/ui/contentassist/ProtobufProposalProvider.java

diff --git a/com.google.eclipse.protobuf.ui/src/com/google/eclipse/protobuf/ui/contentassist/ProtobufProposalProvider.java b/com.google.eclipse.protobuf.ui/src/com/google/eclipse/protobuf/ui/contentassist/ProtobufProposalProvider.java
index b575932..9bed2d8 100644
--- a/com.google.eclipse.protobuf.ui/src/com/google/eclipse/protobuf/ui/contentassist/ProtobufProposalProvider.java
+++ b/com.google.eclipse.protobuf.ui/src/com/google/eclipse/protobuf/ui/contentassist/ProtobufProposalProvider.java
@@ -704,10 +704,11 @@
       ContentAssistContext context, ICompletionProposalAcceptor acceptor) {
   }
 
-  @Override public void completeSimpleValueField_Value(EObject model, Assignment assignment,
-      ContentAssistContext context, ICompletionProposalAcceptor acceptor) {
-    if (model instanceof SimpleValueField) {
-      SimpleValueField field = (SimpleValueField) model;
+  @Override
+  public void complete_SimpleValueLink(EObject model, RuleCall ruleCall, ContentAssistContext context,
+      ICompletionProposalAcceptor acceptor) {
+    SimpleValueField field = extractElementFromContext(context, SimpleValueField.class);
+    if (field != null) {
       FieldName name = field.getName();
       if (name != null) {
         IndexedElement target = name.getTarget();

com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/Protobuf.xtext

diff --git a/com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/Protobuf.xtext b/com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/Protobuf.xtext
index fe0b46f..7b82eb2 100644
--- a/com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/Protobuf.xtext
+++ b/com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/Protobuf.xtext
@@ -219,20 +219,24 @@
 
 // { foo: 1, bar: 2 }
 ComplexValueCurlyBracket:
-  ->'{' {ComplexValueCurlyBracket} (fields+=ValueField (',')?)* '}';
+  '{' {ComplexValueCurlyBracket} (fields+=ValueField (',')?)* '}';
 
 // < foo: 1, bar: 2 >
 ComplexValueAngleBracket:
-  ->'<' {ComplexValueAngleBracket} (fields+=ValueField (',')?)* '>';
+  '<' {ComplexValueAngleBracket} (fields+=ValueField (',')?)* '>';
 
 ValueField:
-  SimpleValueField | ComplexValueField;
+  ->SimpleValueField | ComplexValueField;
 
 SimpleValueField:
-  name=FieldName ':' value=SimpleValueLink ';'?;
+  name=FieldName ':'
+  (values+=SimpleValueLink | '[' values+=SimpleValueLink (',' values+=SimpleValueLink)* ','? ']')
+  ';'?;
 
 ComplexValueField:
-  name=FieldName ':'? values=ComplexValue ';'?;
+  name=FieldName ':'?
+  (values+=ComplexValue | '[' values+=ComplexValue (',' values+=ComplexValue)* ','? ']')
+  ';'?;
 
 FieldName:
   NormalFieldName | ExtensionFieldName;