[gcc(refs/users/marxin/heads/opt-parse-enum-sanity)] c++: Fix pretty printing of TYPENAME_TYPEs

[Martin Liska]

https://gcc.gnu.org/g:ff0a62841e27b838f17a9d6253d131206072df6f

commit ff0a62841e27b838f17a9d6253d131206072df6f
Author: Patrick Palka <ppalka@redhat.com>
Date:   Fri Mar 6 13:19:13 2020 -0500

    c++: Fix pretty printing of TYPENAME_TYPEs
    
    I noticed that in some concepts diagnostic messages, we were printing typename
    types incorrectly, e.g. printing remove_reference_t<T> as
    
      typename remove_reference<T>::remove_reference_t
    
    instead of
    
      typename remove_reference<T>::type.
    
    Fix this by printing the TYPENAME_TYPE_FULLNAME instead of the TYPE_NAME in
    cxx_pretty_printer::simple_type_specifier, which is consistent with how
    dump_typename in error.c does it.
    
    gcc/cp/ChangeLog:
    
            * cxx-pretty-print.c (cxx_pretty_printer::simple_type_specifier)
            [TYPENAME_TYPE]: Print the TYPENAME_TYPE_FULLNAME instead of the
            TYPE_NAME.
    
    gcc/testsuite/ChangeLog:
    
            * g++.dg/concepts/diagnostic4.C: New test.

Diff:
---
 gcc/cp/ChangeLog                            |  6 ++++++
 gcc/cp/cxx-pretty-print.c                   |  2 +-
 gcc/testsuite/ChangeLog                     |  4 ++++
 gcc/testsuite/g++.dg/concepts/diagnostic4.C | 18 ++++++++++++++++++
 4 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 98640a671cc..48ef75c732e 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2020-03-08  Patrick Palka  <ppalka@redhat.com>
+
+	* cxx-pretty-print.c (cxx_pretty_printer::simple_type_specifier)
+	[TYPENAME_TYPE]: Print the TYPENAME_TYPE_FULLNAME instead of the
+	TYPE_NAME.
+
 2020-03-06  Nathan Sidwell  <nathan@acm.org>
 
 	PR c++/94027
diff --git a/gcc/cp/cxx-pretty-print.c b/gcc/cp/cxx-pretty-print.c
index 397bdbfa234..100154e400f 100644
--- a/gcc/cp/cxx-pretty-print.c
+++ b/gcc/cp/cxx-pretty-print.c
@@ -1360,7 +1360,7 @@ cxx_pretty_printer::simple_type_specifier (tree t)
     case TYPENAME_TYPE:
       pp_cxx_ws_string (this, "typename");
       pp_cxx_nested_name_specifier (this, TYPE_CONTEXT (t));
-      pp_cxx_unqualified_id (this, TYPE_NAME (t));
+      pp_cxx_unqualified_id (this, TYPENAME_TYPE_FULLNAME (t));
       break;
 
     default:
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 6fa77ce5505..99e2e426010 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2020-03-08  Patrick Palka  <ppalka@redhat.com>
+
+	* g++.dg/concepts/diagnostic4.C: New test.
+
 2020-03-08  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/89229
diff --git a/gcc/testsuite/g++.dg/concepts/diagnostic4.C b/gcc/testsuite/g++.dg/concepts/diagnostic4.C
new file mode 100644
index 00000000000..677bc867634
--- /dev/null
+++ b/gcc/testsuite/g++.dg/concepts/diagnostic4.C
@@ -0,0 +1,18 @@
+// { dg-do compile { target c++2a } }
+
+template<typename T>
+  struct remove_reference
+  { using type = T; };
+
+template<typename T>
+  using remove_reference_t = remove_reference<T>::type;
+
+template<typename T>
+  inline constexpr bool blah = false;
+
+template<typename T>
+  requires blah<remove_reference_t<T>>
+  // { dg-message "typename remove_reference<T>::type" "" { target *-*-* } .-1 }
+  void foo() { }
+
+void bar() { foo<int> (); } // { dg-error "use of" }