Default values for attributes

grammar/src/attributes.grm

@@ -7,5 +7,5 @@ attributeAnnotation
   ;
 
 attribute
-  : SimpleName{"."} valueArguments?
+  : SimpleName{"."} (valueArguments | "=" expression)?
   ;

idea/src/org/jetbrains/jet/lang/parsing/JetParsing.java

@@ -373,14 +373,19 @@ public class JetParsing extends AbstractJetParsing {
 
     /*
      * attribute
-     *   // : SimpleName{"."} valueArguments?
+     *   // : SimpleName{"."} (valueArguments | "=" expression)?
      *   [for recovery: userType valueArguments?]
      *   ;
      */
     private void parseAttribute() {
         PsiBuilder.Marker attribute = mark();
         parseUserType();
-        if (at(LPAR)) myExpressionParsing.parseValueArgumentList();
+        if (at(LPAR)) {
+            myExpressionParsing.parseValueArgumentList();
+        } else if (at(EQ)) {
+            advance(); // EQ
+            myExpressionParsing.parseExpression();
+        }
         attribute.done(ATTRIBUTE);
     }
 

idea/testData/psi/Attributes.jet

@@ -20,6 +20,9 @@ out
 ref
  class Bar<abstract
 virtual
+[sdfsdf=1+1, a]
+[sdfsdf=1+1]
+[a(), sdfsdf=1+1]
 enum
 open
 attribute

idea/testData/psi/Attributes.txt

@@ -137,6 +137,61 @@ JetFile: Attributes.jet
             PsiWhiteSpace('\n')
             PsiElement(virtual)('virtual')
             PsiWhiteSpace('\n')
+            ATTRIBUTE_ANNOTATION
+              PsiElement(LBRACKET)('[')
+              ATTRIBUTE
+                USER_TYPE
+                  PsiElement(IDENTIFIER)('sdfsdf')
+                PsiElement(EQ)('=')
+                BINARY_EXPRESSION
+                  INTEGER_CONSTANT
+                    PsiElement(INTEGER_LITERAL)('1')
+                  PsiElement(PLUS)('+')
+                  INTEGER_CONSTANT
+                    PsiElement(INTEGER_LITERAL)('1')
+              PsiElement(COMMA)(',')
+              PsiWhiteSpace(' ')
+              ATTRIBUTE
+                USER_TYPE
+                  PsiElement(IDENTIFIER)('a')
+              PsiElement(RBRACKET)(']')
+            PsiWhiteSpace('\n')
+            ATTRIBUTE_ANNOTATION
+              PsiElement(LBRACKET)('[')
+              ATTRIBUTE
+                USER_TYPE
+                  PsiElement(IDENTIFIER)('sdfsdf')
+                PsiElement(EQ)('=')
+                BINARY_EXPRESSION
+                  INTEGER_CONSTANT
+                    PsiElement(INTEGER_LITERAL)('1')
+                  PsiElement(PLUS)('+')
+                  INTEGER_CONSTANT
+                    PsiElement(INTEGER_LITERAL)('1')
+              PsiElement(RBRACKET)(']')
+            PsiWhiteSpace('\n')
+            ATTRIBUTE_ANNOTATION
+              PsiElement(LBRACKET)('[')
+              ATTRIBUTE
+                USER_TYPE
+                  PsiElement(IDENTIFIER)('a')
+                VALUE_ARGUMENT_LIST
+                  PsiElement(LPAR)('(')
+                  PsiElement(RPAR)(')')
+              PsiElement(COMMA)(',')
+              PsiWhiteSpace(' ')
+              ATTRIBUTE
+                USER_TYPE
+                  PsiElement(IDENTIFIER)('sdfsdf')
+                PsiElement(EQ)('=')
+                BINARY_EXPRESSION
+                  INTEGER_CONSTANT
+                    PsiElement(INTEGER_LITERAL)('1')
+                  PsiElement(PLUS)('+')
+                  INTEGER_CONSTANT
+                    PsiElement(INTEGER_LITERAL)('1')
+              PsiElement(RBRACKET)(']')
+            PsiWhiteSpace('\n')
             PsiElement(enum)('enum')
             PsiWhiteSpace('\n')
             PsiElement(open)('open')