c++: Implement __is_member_function_pointer built-in trait

This patch implements built-in trait for std::is_member_function_pointer.

gcc/cp/ChangeLog:

	* cp-trait.def: Define __is_member_function_pointer.
	* constraint.cc (diagnose_trait_expr): Handle
	CPTK_IS_MEMBER_FUNCTION_POINTER.
	* semantics.cc (trait_expr_value): Likewise.
	(finish_trait_expr): Likewise.

gcc/testsuite/ChangeLog:

	* g++.dg/ext/has-builtin-1.C: Test existence of
	__is_member_function_pointer.
	* g++.dg/ext/is_member_function_pointer.C: New test.

Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>

diff --git a/gcc/cp/constraint.cc b/gcc/cp/constraint.cc
index fb150e02ea920df53c4504af8bbbb5538ec7d83c..1efc7983039a946f23855379cd9a37e4ccd8e6f9 100644 (file)
--- a/gcc/cp/constraint.cc
+++ b/gcc/cp/constraint.cc
@@ -3758,6 +3758,9 @@ diagnose_trait_expr (tree expr, tree args)
     case CPTK_IS_LITERAL_TYPE:
       inform (loc, "  %qT is not a literal type", t1);
       break;
+    case CPTK_IS_MEMBER_FUNCTION_POINTER:
+      inform (loc, "  %qT is not a member function pointer", t1);
+      break;
     case CPTK_IS_MEMBER_POINTER:
       inform (loc, "  %qT is not a member pointer", t1);
       break;

diff --git a/gcc/cp/cp-trait.def b/gcc/cp/cp-trait.def
index e17f5eaeac41dffd626942828e48be441acf8f97..03a5cc280205a4fed4b939ea459c0fb4f1d35a40 100644 (file)
--- a/gcc/cp/cp-trait.def
+++ b/gcc/cp/cp-trait.def
@@ -71,6 +71,7 @@ DEFTRAIT_EXPR (IS_ENUM, "__is_enum", 1)
 DEFTRAIT_EXPR (IS_FINAL, "__is_final", 1)
 DEFTRAIT_EXPR (IS_LAYOUT_COMPATIBLE, "__is_layout_compatible", 2)
 DEFTRAIT_EXPR (IS_LITERAL_TYPE, "__is_literal_type", 1)
+DEFTRAIT_EXPR (IS_MEMBER_FUNCTION_POINTER, "__is_member_function_pointer", 1)
 DEFTRAIT_EXPR (IS_MEMBER_POINTER, "__is_member_pointer", 1)
 DEFTRAIT_EXPR (IS_NOTHROW_ASSIGNABLE, "__is_nothrow_assignable", 2)
 DEFTRAIT_EXPR (IS_NOTHROW_CONSTRUCTIBLE, "__is_nothrow_constructible", -1)

diff --git a/gcc/cp/semantics.cc b/gcc/cp/semantics.cc
index a462ed35d897715e985ddbc416337f8a0c054d8f..e8224e81933800ad553012bedf3deb93e7c7a9a8 100644 (file)
--- a/gcc/cp/semantics.cc
+++ b/gcc/cp/semantics.cc
@@ -12425,6 +12425,9 @@ trait_expr_value (cp_trait_kind kind, tree type1, tree type2)
     case CPTK_IS_LITERAL_TYPE:
       return literal_type_p (type1);
 
+    case CPTK_IS_MEMBER_FUNCTION_POINTER:
+      return TYPE_PTRMEMFUNC_P (type1);
+
     case CPTK_IS_MEMBER_POINTER:
       return TYPE_PTRMEM_P (type1);
 
@@ -12630,6 +12633,7 @@ finish_trait_expr (location_t loc, cp_trait_kind kind, tree type1, tree type2)
     case CPTK_IS_BOUNDED_ARRAY:
     case CPTK_IS_CLASS:
     case CPTK_IS_ENUM:
+    case CPTK_IS_MEMBER_FUNCTION_POINTER:
     case CPTK_IS_MEMBER_POINTER:
     case CPTK_IS_SAME:
     case CPTK_IS_SCOPED_ENUM:

diff --git a/gcc/testsuite/g++.dg/ext/has-builtin-1.C b/gcc/testsuite/g++.dg/ext/has-builtin-1.C
index 349fae7104e77ddebdbeaaf0df4384e436197b1a..fb17680d3b065248b90aaed062dd1cd175f527f4 100644 (file)
--- a/gcc/testsuite/g++.dg/ext/has-builtin-1.C
+++ b/gcc/testsuite/g++.dg/ext/has-builtin-1.C
@@ -92,6 +92,9 @@
 #if !__has_builtin (__is_literal_type)
 # error "__has_builtin (__is_literal_type) failed"
 #endif
+#if !__has_builtin (__is_member_function_pointer)
+# error "__has_builtin (__is_member_function_pointer) failed"
+#endif
 #if !__has_builtin (__is_member_pointer)
 # error "__has_builtin (__is_member_pointer) failed"
 #endif

diff --git a/gcc/testsuite/g++.dg/ext/is_member_function_pointer.C b/gcc/testsuite/g++.dg/ext/is_member_function_pointer.C
new file mode 100644 (file)
index 0000000..555123e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/is_member_function_pointer.C
@@ -0,0 +1,31 @@
+// { dg-do compile { target c++11 } }
+
+#include <testsuite_tr1.h>
+
+using namespace __gnu_test;
+
+#define SA(X) static_assert((X),#X)
+
+#define SA_TEST_FN(TRAIT, TYPE, EXPECT)        \
+  SA(TRAIT(TYPE) == EXPECT);                   \
+  SA(TRAIT(const TYPE) == EXPECT);
+
+#define SA_TEST_CATEGORY(TRAIT, TYPE, EXPECT)  \
+  SA(TRAIT(TYPE) == EXPECT);                                   \
+  SA(TRAIT(const TYPE) == EXPECT);                             \
+  SA(TRAIT(volatile TYPE) == EXPECT);                  \
+  SA(TRAIT(const volatile TYPE) == EXPECT)
+
+// Positive tests.
+SA_TEST_FN(__is_member_function_pointer, int (ClassType::*) (int), true);
+SA_TEST_FN(__is_member_function_pointer, int (ClassType::*) (int) const, true);
+SA_TEST_FN(__is_member_function_pointer, int (ClassType::*) (float, ...), true);
+SA_TEST_FN(__is_member_function_pointer, ClassType (ClassType::*) (ClassType), true);
+SA_TEST_FN(__is_member_function_pointer, float (ClassType::*) (int, float, int[], int&), true);
+
+// Negative tests.
+SA_TEST_CATEGORY(__is_member_function_pointer, int (ClassType::*), false);
+SA_TEST_CATEGORY(__is_member_function_pointer, ClassType (ClassType::*), false);
+
+// Sanity check.
+SA_TEST_CATEGORY(__is_member_function_pointer, ClassType, false);