[C++ Patch] PR 51412

[Paolo Carlini]

Hi,

today I noticed that I still have assigned this rather simple diagnostic 
issue, where LAMBDA_EXPR is unhandled by our pretty printing code. I 
suppose we can make at least some progress for 4.8.0. Is the below goo 
enough for now?

Tested x86_64-linux.

Thanks,
Paolo.

//////////////////////
/cp
2013-03-08  Paolo Carlini  <paolo.carl...@oracle.com>

        PR c++/51412
        * cxx-pretty-print.c (pp_cxx_expression): Handle LAMBDA_EXPR.
        * error.c (dump_expr): Likewise.

/testsuite
2013-03-08  Paolo Carlini  <paolo.carl...@oracle.com>

        PR c++/51412
        * g++.dg/cpp0x/lambda/lambda-err3.C: New.
Index: cp/cxx-pretty-print.c
===================================================================
--- cp/cxx-pretty-print.c       (revision 196540)
+++ cp/cxx-pretty-print.c       (working copy)
@@ -1162,6 +1162,10 @@ pp_cxx_expression (cxx_pretty_printer *pp, tree t)
          }
       }
       break;
+      
+    case LAMBDA_EXPR:
+      pp_cxx_ws_string (pp, "<lambda>");
+      break;
 
     default:
       pp_c_expression (pp_c_base (pp), t);
Index: cp/error.c
===================================================================
--- cp/error.c  (revision 196540)
+++ cp/error.c  (working copy)
@@ -2494,6 +2494,10 @@ dump_expr (tree t, int flags)
       dump_expr (resolve_virtual_fun_from_obj_type_ref (t), flags);
       break;
 
+    case LAMBDA_EXPR:
+      pp_string (cxx_pp, M_("<lambda>"));
+      break;
+
       /*  This list is incomplete, but should suffice for now.
          It is very important that `sorry' does not call
          `report_error_function'.  That could cause an infinite loop.  */
Index: testsuite/g++.dg/cpp0x/lambda/lambda-err3.C
===================================================================
--- testsuite/g++.dg/cpp0x/lambda/lambda-err3.C (revision 0)
+++ testsuite/g++.dg/cpp0x/lambda/lambda-err3.C (working copy)
@@ -0,0 +1,10 @@
+// PR c++/51412
+// { dg-do compile { target c++11 } }
+
+void foo(int);
+
+template<int> void bar()
+{
+  foo([]{}...);      // { dg-error "<lambda>" }
+  foo([]{}=0 ...);   // { dg-error "<lambda>" }
+}