[PATCH v12 04/40] c++: Implement __is_volatile built-in trait
Ken Matsui
kmatsui@gcc.gnu.org
Fri Sep 15 02:21:10 GMT 2023
This patch implements built-in trait for std::is_volatile.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_volatile.
* constraint.cc (diagnose_trait_expr): Handle CPTK_IS_VOLATILE.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of __is_volatile.
* g++.dg/ext/is_volatile.C: New test.
Signed-off-by: Ken Matsui <kmatsui@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_volatile.C | 19 +++++++++++++++++++
5 files changed, 30 insertions(+)
create mode 100644 gcc/testsuite/g++.dg/ext/is_volatile.C
diff --git a/gcc/cp/constraint.cc b/gcc/cp/constraint.cc
index 567dd35fe0a..f031e022541 100644
--- a/gcc/cp/constraint.cc
+++ b/gcc/cp/constraint.cc
@@ -3796,6 +3796,9 @@ diagnose_trait_expr (tree expr, tree args)
case CPTK_IS_UNION:
inform (loc, " %qT is not a union", t1);
break;
+ case CPTK_IS_VOLATILE:
+ inform (loc, " %qT is not a volatile type", t1);
+ break;
case CPTK_REF_CONSTRUCTS_FROM_TEMPORARY:
inform (loc, " %qT is not a reference that binds to a temporary "
"object of type %qT (direct-initialization)", t1, t2);
diff --git a/gcc/cp/cp-trait.def b/gcc/cp/cp-trait.def
index a4ebfd9f319..60462cd9874 100644
--- a/gcc/cp/cp-trait.def
+++ b/gcc/cp/cp-trait.def
@@ -83,6 +83,7 @@ DEFTRAIT_EXPR (IS_TRIVIALLY_ASSIGNABLE, "__is_trivially_assignable", 2)
DEFTRAIT_EXPR (IS_TRIVIALLY_CONSTRUCTIBLE, "__is_trivially_constructible", -1)
DEFTRAIT_EXPR (IS_TRIVIALLY_COPYABLE, "__is_trivially_copyable", 1)
DEFTRAIT_EXPR (IS_UNION, "__is_union", 1)
+DEFTRAIT_EXPR (IS_VOLATILE, "__is_volatile", 1)
DEFTRAIT_EXPR (REF_CONSTRUCTS_FROM_TEMPORARY, "__reference_constructs_from_temporary", 2)
DEFTRAIT_EXPR (REF_CONVERTS_FROM_TEMPORARY, "__reference_converts_from_temporary", 2)
DEFTRAIT_TYPE (REMOVE_CV, "__remove_cv", 1)
diff --git a/gcc/cp/semantics.cc b/gcc/cp/semantics.cc
index 17d6e6728f9..647124265a6 100644
--- a/gcc/cp/semantics.cc
+++ b/gcc/cp/semantics.cc
@@ -12202,6 +12202,9 @@ trait_expr_value (cp_trait_kind kind, tree type1, tree type2)
case CPTK_IS_UNION:
return type_code1 == UNION_TYPE;
+ case CPTK_IS_VOLATILE:
+ return CP_TYPE_VOLATILE_P (type1);
+
case CPTK_REF_CONSTRUCTS_FROM_TEMPORARY:
return ref_xes_from_temporary (type1, type2, /*direct_init=*/true);
@@ -12363,6 +12366,7 @@ finish_trait_expr (location_t loc, cp_trait_kind kind, tree type1, tree type2)
case CPTK_IS_ENUM:
case CPTK_IS_SAME:
case CPTK_IS_UNION:
+ case CPTK_IS_VOLATILE:
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 e6e481b13c5..fb03dd20e84 100644
--- a/gcc/testsuite/g++.dg/ext/has-builtin-1.C
+++ b/gcc/testsuite/g++.dg/ext/has-builtin-1.C
@@ -131,6 +131,9 @@
#if !__has_builtin (__is_union)
# error "__has_builtin (__is_union) failed"
#endif
+#if !__has_builtin (__is_volatile)
+# error "__has_builtin (__is_volatile) failed"
+#endif
#if !__has_builtin (__reference_constructs_from_temporary)
# error "__has_builtin (__reference_constructs_from_temporary) failed"
#endif
diff --git a/gcc/testsuite/g++.dg/ext/is_volatile.C b/gcc/testsuite/g++.dg/ext/is_volatile.C
new file mode 100644
index 00000000000..004e397e5e7
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/is_volatile.C
@@ -0,0 +1,19 @@
+// { dg-do compile { target c++11 } }
+
+#include <testsuite_tr1.h>
+
+using namespace __gnu_test;
+
+#define SA(X) static_assert((X),#X)
+
+// Positive tests.
+SA(__is_volatile(volatile int));
+SA(__is_volatile(const volatile int));
+SA(__is_volatile(vClassType));
+SA(__is_volatile(cvClassType));
+
+// Negative tests.
+SA(!__is_volatile(int));
+SA(!__is_volatile(const int));
+SA(!__is_volatile(ClassType));
+SA(!__is_volatile(cClassType));
--
2.42.0
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