This patch implements built-in trait for std::is_scoped_enum. gcc/cp/ChangeLog:
* cp-trait.def (IS_SCOPED_ENUM): Define __is_scoped_enum. * constraint.cc (diagnose_trait_expr): Handle CPTK_IS_SCOPED_ENUM. * semantics.cc (trait_expr_value): Likewise. (finish_trait_expr): Likewise. gcc/testsuite/ChangeLog: * g++.dg/ext/has-builtin-1.C: Test existence of is_scoped_enum. * g++.dg/ext/is_scoped_enum.C: New test. Signed-off-by: Ken Matsui <kmat...@gcc.gnu.org> --- gcc/cp/constraint.cc | 3 + gcc/cp/cp-trait.def | 1 + gcc/cp/semantics.cc | 4 ++ gcc/testsuite/g++.dg/ext/has-builtin-1.C | 3 + gcc/testsuite/g++.dg/ext/is_scoped_enum.C | 67 +++++++++++++++++++++++ 5 files changed, 78 insertions(+) create mode 100644 gcc/testsuite/g++.dg/ext/is_scoped_enum.C diff --git a/gcc/cp/constraint.cc b/gcc/cp/constraint.cc index c9e4e7043cd..ba387cb5eb5 100644 --- a/gcc/cp/constraint.cc +++ b/gcc/cp/constraint.cc @@ -3760,6 +3760,9 @@ diagnose_trait_expr (tree expr, tree args) case CPTK_IS_ASSIGNABLE: inform (loc, " %qT is not assignable from %qT", t1, t2); break; + case CPTK_IS_SCOPED_ENUM: + inform (loc, " %qT is not a scoped enum", t1); + break; case CPTK_IS_TRIVIALLY_ASSIGNABLE: inform (loc, " %qT is not trivially assignable from %qT", t1, t2); break; diff --git a/gcc/cp/cp-trait.def b/gcc/cp/cp-trait.def index 8b7fece0cc8..8caabe4c289 100644 --- a/gcc/cp/cp-trait.def +++ b/gcc/cp/cp-trait.def @@ -76,6 +76,7 @@ DEFTRAIT_EXPR (IS_POINTER_INTERCONVERTIBLE_BASE_OF, "__is_pointer_interconvertib DEFTRAIT_EXPR (IS_POD, "__is_pod", 1) DEFTRAIT_EXPR (IS_POLYMORPHIC, "__is_polymorphic", 1) DEFTRAIT_EXPR (IS_SAME, "__is_same", 2) +DEFTRAIT_EXPR (IS_SCOPED_ENUM, "__is_scoped_enum", 1) DEFTRAIT_EXPR (IS_STD_LAYOUT, "__is_standard_layout", 1) DEFTRAIT_EXPR (IS_TRIVIAL, "__is_trivial", 1) DEFTRAIT_EXPR (IS_TRIVIALLY_ASSIGNABLE, "__is_trivially_assignable", 2) diff --git a/gcc/cp/semantics.cc b/gcc/cp/semantics.cc index 0f7f4e87ae4..7e10d81fa34 100644 --- a/gcc/cp/semantics.cc +++ b/gcc/cp/semantics.cc @@ -12163,6 +12163,9 @@ trait_expr_value (cp_trait_kind kind, tree type1, tree type2) case CPTK_IS_SAME: return same_type_p (type1, type2); + case CPTK_IS_SCOPED_ENUM: + return SCOPED_ENUM_P (type1); + case CPTK_IS_STD_LAYOUT: return std_layout_type_p (type1); @@ -12359,6 +12362,7 @@ finish_trait_expr (location_t loc, cp_trait_kind kind, tree type1, tree type2) case CPTK_IS_ENUM: case CPTK_IS_UNION: case CPTK_IS_SAME: + case CPTK_IS_SCOPED_ENUM: break; case CPTK_IS_LAYOUT_COMPATIBLE: diff --git a/gcc/testsuite/g++.dg/ext/has-builtin-1.C b/gcc/testsuite/g++.dg/ext/has-builtin-1.C index f343e153e56..bc79e50054a 100644 --- a/gcc/testsuite/g++.dg/ext/has-builtin-1.C +++ b/gcc/testsuite/g++.dg/ext/has-builtin-1.C @@ -146,3 +146,6 @@ #if !__has_builtin (__remove_cvref) # error "__has_builtin (__remove_cvref) failed" #endif +#if !__has_builtin (__is_scoped_enum) +# error "__has_builtin (__is_scoped_enum) failed" +#endif diff --git a/gcc/testsuite/g++.dg/ext/is_scoped_enum.C b/gcc/testsuite/g++.dg/ext/is_scoped_enum.C new file mode 100644 index 00000000000..a563b6ee67d --- /dev/null +++ b/gcc/testsuite/g++.dg/ext/is_scoped_enum.C @@ -0,0 +1,67 @@ +// { 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) + +enum class E { e1, e2 }; +SA_TEST_CATEGORY(__is_scoped_enum, E, true); +enum class Ec : char { e1, e2 }; +SA_TEST_CATEGORY(__is_scoped_enum, Ec, true); + +// negative tests +enum U { u1, u2 }; +SA_TEST_CATEGORY(__is_scoped_enum, U, false); +enum F : int { f1, f2 }; +SA_TEST_CATEGORY(__is_scoped_enum, F, false); +struct S; +SA_TEST_CATEGORY(__is_scoped_enum, S, false); +struct S { }; +SA_TEST_CATEGORY(__is_scoped_enum, S, false); + +SA_TEST_CATEGORY(__is_scoped_enum, int, false); +SA_TEST_CATEGORY(__is_scoped_enum, int[], false); +SA_TEST_CATEGORY(__is_scoped_enum, int[2], false); +SA_TEST_CATEGORY(__is_scoped_enum, int[][2], false); +SA_TEST_CATEGORY(__is_scoped_enum, int[2][3], false); +SA_TEST_CATEGORY(__is_scoped_enum, int*, false); +SA_TEST_CATEGORY(__is_scoped_enum, int&, false); +SA_TEST_CATEGORY(__is_scoped_enum, int*&, false); +SA_TEST_FN(__is_scoped_enum, int(), false); +SA_TEST_FN(__is_scoped_enum, int(*)(), false); +SA_TEST_FN(__is_scoped_enum, int(&)(), false); + +enum opaque_unscoped : short; +enum class opaque_scoped; +enum class opaque_scoped_with_base : long; + +SA_TEST_CATEGORY(__is_scoped_enum, opaque_unscoped, false); +SA_TEST_CATEGORY(__is_scoped_enum, opaque_scoped, true); +SA_TEST_CATEGORY(__is_scoped_enum, opaque_scoped_with_base, true); + +enum unscoped { + u_is_scoped = __is_scoped_enum(unscoped), +}; +SA( ! unscoped::u_is_scoped ); + +enum unscoped_fixed : char { + uf_is_scoped = __is_scoped_enum(unscoped_fixed), +}; +SA( ! unscoped_fixed::uf_is_scoped ); + +enum class scoped { + is_scoped = __is_scoped_enum(scoped), +}; +SA( (bool) scoped::is_scoped ); -- 2.42.0