make SignatureUtil format closer to JVM

compiler/backend/src/org/jetbrains/jet/codegen/SignatureUtil.java

@@ -68,6 +68,10 @@ public class SignatureUtil {
 
     private static void genTypeParams(JetClass type, StringBuilder sb) {
         List<JetTypeParameter> parameters = type.getTypeParameterList().getParameters();
+        if (parameters.isEmpty()) {
+            return;
+        }
+        sb.append('<');
         for(JetTypeParameter param : parameters) {
             sb.append("T");
             Variance variance = param.getVariance();
@@ -78,5 +82,6 @@ public class SignatureUtil {
             sb.append(param.getName());
             sb.append(";");
         }
+        sb.append('>');
     }
 }

stdlib/src/jet/typeinfo/TypeInfo.java

@@ -536,13 +536,20 @@ public abstract class TypeInfo<T> implements JetObject {
         }
 
         public void parseVars(Signature signature) {
-            while(cur < string.length && string[cur] == 'T') {
-                if(signature.variables == null) {
-                    signature.variables  = new LinkedList<TypeInfoProjection>();
-                    signature.varNames = new HashMap<String, Integer>();
+            if (cur < string.length && string[cur] == '<') {
+                cur++;
+                while(cur < string.length && string[cur] != '>') {
+                    if(signature.variables == null) {
+                        signature.variables  = new LinkedList<TypeInfoProjection>();
+                        signature.varNames = new HashMap<String, Integer>();
+                    }
+                    if (string[cur] != 'T') {
+                        throw new IllegalStateException(new String(string));
+                    }
+                    cur++;
+                    signature.variables.add(parseVar(signature));
                 }
                 cur++;
-                signature.variables.add(parseVar(signature));
             }
             signature.variables = signature.variables == null ? Collections.<TypeInfoProjection>emptyList() : signature.variables;
             signature.varNames  = signature.varNames == null ? Collections.<String,Integer>emptyMap() : signature.varNames;