Add new token COLONCOLON (::) for callable reference

#KT-1183 In Progress

compiler/frontend/src/org/jetbrains/jet/lang/parsing/JetExpressionParsing.java

@@ -57,7 +57,8 @@ public class JetExpressionParsing extends AbstractJetParsing {
             PLUS, MINUS, EXCL, DIV, PERC, LTEQ,
             // TODO GTEQ,   foo<bar, baz>=x
             EQEQEQ, EXCLEQEQEQ, EQEQ, EXCLEQ, ANDAND, OROR, SAFE_ACCESS, ELVIS,
-            SEMICOLON, RANGE, EQ, MULTEQ, DIVEQ, PERCEQ, PLUSEQ, MINUSEQ, NOT_IN, NOT_IS, //HASH,
+            SEMICOLON, RANGE, EQ, MULTEQ, DIVEQ, PERCEQ, PLUSEQ, MINUSEQ, NOT_IN, NOT_IS,
+            COLONCOLON,
             COLON
     );
 
@@ -68,6 +69,8 @@ public class JetExpressionParsing extends AbstractJetParsing {
             LBRACKET, LABEL_IDENTIFIER, AT, ATAT,
             // Atomic
 
+            COLONCOLON, // callable reference
+
             LPAR, // parenthesized
             HASH, // Tuple
 
@@ -128,7 +131,6 @@ public class JetExpressionParsing extends AbstractJetParsing {
     @SuppressWarnings({"UnusedDeclaration"})
     public enum Precedence {
         POSTFIX(PLUSPLUS, MINUSMINUS, EXCLEXCL,
-//                HASH,
                 DOT, SAFE_ACCESS), // typeArguments? valueArguments : typeArguments : arrayAccess
 
         PREFIX(MINUS, PLUS, MINUSMINUS, PLUSPLUS, EXCL, LABEL_IDENTIFIER, AT, ATAT) { // attributes

compiler/frontend/src/org/jetbrains/jet/lang/psi/JetCallableReferenceExpression.java

@@ -35,7 +35,7 @@ public class JetCallableReferenceExpression extends JetExpressionImpl {
 
     @NotNull
     public JetSimpleNameExpression getCallableReference() {
-        ASTNode node = getNode().findChildByType(JetTokens.OPERATIONS /* TODO: COLONCOLON */);
+        ASTNode node = getNode().findChildByType(JetTokens.COLONCOLON);
         while (node != null) {
             PsiElement psi = node.getPsi();
             if (psi instanceof JetSimpleNameExpression) {

compiler/frontend/src/org/jetbrains/jet/lexer/Jet.flex

@@ -297,6 +297,7 @@ LONG_TEMPLATE_ENTRY_END=\}
 "=>"         { return JetTokens.DOUBLE_ARROW; }
 ".."         { return JetTokens.RANGE     ; }
 "@@"         { return JetTokens.ATAT      ; }
+"::"         { return JetTokens.COLONCOLON; }
 "["          { return JetTokens.LBRACKET  ; }
 "]"          { return JetTokens.RBRACKET  ; }
 "{"          { return JetTokens.LBRACE    ; }

compiler/frontend/src/org/jetbrains/jet/lexer/JetTokens.java

@@ -113,6 +113,7 @@ public interface JetTokens {
     //    JetToken MAP         = new JetToken("MAP");
 //    JetToken FILTER      = new JetToken("FILTER");
     JetToken QUEST       = new JetToken("QUEST");
+    JetToken COLONCOLON  = new JetToken("COLONCOLON");
     JetToken COLON       = new JetToken("COLON");
     JetToken SEMICOLON   = new JetToken("SEMICOLON");
     JetToken RANGE       = new JetToken("RANGE");
@@ -191,7 +192,6 @@ public interface JetTokens {
             COLON,
             RANGE, EQ, MULTEQ, DIVEQ, PERCEQ, PLUSEQ, MINUSEQ,
             NOT_IN, NOT_IS,
-//            HASH,
             IDENTIFIER, LABEL_IDENTIFIER, ATAT, AT);
 
     TokenSet AUGMENTED_ASSIGNMENTS = TokenSet.create(PLUSEQ, MINUSEQ, MULTEQ, PERCEQ, DIVEQ);