Merge pull request #3 from sc-forks/interpolation

Allow simple interpolated argument in CallExpression

Author: cgewecke

solidity.pegjs

@@ -171,6 +171,9 @@ IdentifierName "identifier"
       };
     }
 
+Interpolation
+  = "{{" __ name:IdentifierName __ "}}" { return name; }
+
 IdentifierStart
   = UnicodeLetter
   / "$"
@@ -660,6 +663,9 @@ Arguments
   / "(" __ "{" __ args:(NameValueList (__ ",")? )? __ "}" __ ")" {
       return optionalList(extractOptional(args, 0));
     }
+  / "(" __ args:Interpolation __ ")" {
+      return [args];
+    }
 
 ArgumentList
   = head:AssignmentExpression tail:(__ "," __ AssignmentExpression)* {

test/doc_examples.sol

@@ -395,3 +395,8 @@ contract Ballot {
       voted: true,
     });
 }
+
+contract GnosisInterpolations {
+    uint constant x = 2;
+    EventFactory constant eventFactory = EventFactory({{EventFactory}});
+}