decl.c (grok_reference_init): Improve error location.

/cp
2019-01-08  Paolo Carlini  <paolo.carlini@oracle.com>

	* decl.c (grok_reference_init): Improve error location.
	(grokdeclarator): Likewise, improve two locations.

/testsuite
2019-01-08  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/diagnostic/constexpr2.C: New.
	* g++.dg/diagnostic/ref3.C: Likewise.

From-SVN: r267756

gcc/cp/ChangeLog

+2019-01-08  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	* decl.c (grok_reference_init): Improve error location.
+	(grokdeclarator): Likewise, improve two locations.
+
 2019-01-08  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/88538 - braced-init-list in template-argument-list.

gcc/cp/decl.c

@@ -5357,7 +5357,8 @@ grok_reference_init (tree decl, tree type, tree init, int flags)
       if ((DECL_LANG_SPECIFIC (decl) == 0
 	   || DECL_IN_AGGR_P (decl) == 0)
 	  && ! DECL_THIS_EXTERN (decl))
-	error ("%qD declared as reference but not initialized", decl);
+	error_at (DECL_SOURCE_LOCATION (decl),
+		  "%qD declared as reference but not initialized", decl);
       return NULL_TREE;
     }
 
@@ -12517,8 +12518,9 @@ grokdeclarator (const cp_declarator *declarator,
 			    unqualified_id);
 		else if (constexpr_p && !initialized)
 		  {
-		    error ("%<constexpr%> static data member %qD must have an "
-			   "initializer", decl);
+		    error_at (DECL_SOURCE_LOCATION (decl),
+			      "%<constexpr%> static data member %qD must "
+			      "have an initializer", decl);
 		    constexpr_p = false;
 		  }
 
@@ -12756,8 +12758,9 @@ grokdeclarator (const cp_declarator *declarator,
 	  }
 	else if (constexpr_p && DECL_EXTERNAL (decl))
 	  {
-	    error ("declaration of %<constexpr%> variable %qD "
-		   "is not a definition", decl);
+	    error_at (DECL_SOURCE_LOCATION (decl),
+		      "declaration of %<constexpr%> variable %qD "
+		      "is not a definition", decl);
 	    constexpr_p = false;
 	  }
 

gcc/testsuite/ChangeLog

+2019-01-08  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	* g++.dg/diagnostic/constexpr2.C: New.
+	* g++.dg/diagnostic/ref3.C: Likewise.
+
 2019-01-08  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/88538 - braced-init-list in template-argument-list.

gcc/testsuite/g++.dg/diagnostic/constexpr2.C

+// { dg-do compile { target c++11 } }
+
+extern constexpr int i __attribute__((unused));  // { dg-error "22:declaration of .constexpr. variable .i." }
+
+struct S
+{
+  constexpr static int i __attribute__((unused));  // { dg-error "24:.constexpr. static data member .i." }
+};

gcc/testsuite/g++.dg/diagnostic/ref3.C

+int& i __attribute__((unused));  // { dg-error "6:.i. declared as reference" }