New syntax for property accessors

grammar/src/class.grm

@@ -42,7 +42,8 @@ typeParameter
   ;
 
 typeConstraint
-  : userType ":" (userType | "this") // "this" for self-type 
+  : userType ":" type
+  : "class" "object" userType ":" type
   // TODO: other constraints, maybe
   ;
 

grammar/src/class_members.grm

@@ -85,7 +85,7 @@ functionBody
 
 property
   : modifiers ("val" | "var") attributes (type ".")? SimpleName (":" type)? ("=" expression)?
-      "{" getter? setter? "}"
+      (getter? setter? | setter? getter?)
   ;
 
 getter

grammar/src/expressions.grm

@@ -39,17 +39,22 @@ declaration
   ;
 
 expressionWithPrecedences // See the precedence table, everything associates to the left
+  : memberLiteral
+  : memberAccessExpression
   : infixFunctionCall
   : binOpExpression
   : assignment
   : unOpExpression
   : castExpression
   : typingExpression
-  : memberAccessExpression
+  ;
+
+memberLiteral
+  : expression? '#' SimpleName
   ;
 
 memberAccessExpression
-  : (expression accessOp)? memberAccess
+  : (expression accessOp)? (memberAccess | expression)
   ;
 
 accessOp