Pedwarn on a non-standard position of a C++ attribute.

From-SVN: r260682

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 10e57ee..fdf73d1 100644 (file)
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2018-05-24  Ville Voutilainen  <ville.voutilainen@gmail.com>
+
+       Pedwarn on a non-standard position of a C++ attribute.
+       * parser.c (cp_parser_namespace_definition): Pedwarn about attributes
+       after the namespace name.
+
 2018-05-24  Paolo Carlini  <paolo.carlini@oracle.com>
 
        * cp-tree.h (INDIRECT_TYPE_P): New.

diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index c0220bf..f5a6d94 100644 (file)
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -18656,6 +18656,11 @@ cp_parser_namespace_definition (cp_parser* parser)
        {
          identifier = cp_parser_identifier (parser);
 
+         if (cp_next_tokens_can_be_std_attribute_p (parser))
+           pedwarn (input_location, OPT_Wpedantic,
+                    "standard attributes on namespaces must precede "
+                    "the namespace name");
+
          /* Parse any attributes specified after the identifier.  */
          attribs = attr_chainon (attribs, cp_parser_attributes_opt (parser));
        }

diff --git a/gcc/testsuite/g++.dg/cpp0x/gen-attrs-56.C b/gcc/testsuite/g++.dg/cpp0x/gen-attrs-56.C
index f331ed3..f63fff4 100644 (file)
--- a/gcc/testsuite/g++.dg/cpp0x/gen-attrs-56.C
+++ b/gcc/testsuite/g++.dg/cpp0x/gen-attrs-56.C
@@ -2,4 +2,4 @@
 // { dg-do compile { target c++11 } }
 
 namespace foo __attribute__((visibility("default"))) {}
-namespace bar [[gnu::visibility("default")]] {}
+namespace [[gnu::visibility("default")]] bar {}

diff --git a/gcc/testsuite/g++.dg/cpp0x/gen-attrs-64.C b/gcc/testsuite/g++.dg/cpp0x/gen-attrs-64.C
index c0d48fc..4b335eb 100644 (file)
--- a/gcc/testsuite/g++.dg/cpp0x/gen-attrs-64.C
+++ b/gcc/testsuite/g++.dg/cpp0x/gen-attrs-64.C
@@ -1,4 +1,4 @@
 // PR c++/85140
 // { dg-do compile { target c++11 } }
 
-namespace N alignas() {}       // { dg-error "expected" }
+namespace alignas() N  {}      // { dg-error "expected" }

diff --git a/gcc/testsuite/g++.dg/cpp1z/namespace-attribs2.C b/gcc/testsuite/g++.dg/cpp1z/namespace-attribs2.C
new file mode 100644 (file)
index 0000000..2049da3
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp1z/namespace-attribs2.C
@@ -0,0 +1,7 @@
+// { dg-options "-std=c++17" }
+// { dg-additional-options "-pedantic" }
+
+namespace B [[deprecated]] {} // { dg-warning "ignored|must precede" }
+
+namespace [[deprecated]] D {} // { dg-warning "ignored" }
+