From: Ken Matsui <kmatsui@cs.washington.edu>
To: gcc-patches@gcc.gnu.org
Cc: Patrick Palka <ppalka@redhat.com>
Subject: [PATCH] c++: implement __add_pointer built-in trait
Date: Mon, 20 Mar 2023 00:44:59 -0700 [thread overview]
Message-ID: <CAML+3pUMO-RG5TjMDKVVxWQn194gPDs4ub7FoTYn6LO_rsFymQ@mail.gmail.com> (raw)
This patch implements built-in trait for std::add_pointer.
gcc/cp/ChangeLog:
* cp-trait.def: Define __add_pointer.
* semantics.cc (finish_trait_type): Handle CPTK_ADD_POINTER.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of __add_pointer.
* g++.dg/ext/add_pointer.C: New test.
---
diff --git a/gcc/cp/cp-trait.def b/gcc/cp/cp-trait.def
index bac593c0094..07fab8db26b 100644
--- a/gcc/cp/cp-trait.def
+++ b/gcc/cp/cp-trait.def
@@ -91,6 +91,7 @@ DEFTRAIT_TYPE (REMOVE_CV, "__remove_cv", 1)
DEFTRAIT_TYPE (REMOVE_REFERENCE, "__remove_reference", 1)
DEFTRAIT_TYPE (REMOVE_CVREF, "__remove_cvref", 1)
DEFTRAIT_TYPE (UNDERLYING_TYPE, "__underlying_type", 1)
+DEFTRAIT_TYPE (ADD_POINTER, "__add_pointer", 1)
/* These traits yield a type pack, not a type, and are represented by
cp_parser_trait as a special BASES tree instead of a TRAIT_TYPE tree. */
diff --git a/gcc/cp/semantics.cc b/gcc/cp/semantics.cc
index 87c2e8a7111..3527f596983 100644
--- a/gcc/cp/semantics.cc
+++ b/gcc/cp/semantics.cc
@@ -12273,6 +12273,10 @@ finish_trait_type (cp_trait_kind kind, tree
type1, tree type2)
if (TYPE_REF_P (type1))
type1 = TREE_TYPE (type1);
return cv_unqualified (type1);
+ case CPTK_ADD_POINTER:
+ if (TYPE_REF_P (type1))
+ type1 = TREE_TYPE (type1);
+ return build_pointer_type (type1);
#define DEFTRAIT_EXPR(CODE, NAME, ARITY) \
case CPTK_##CODE:
diff --git a/gcc/testsuite/g++.dg/ext/add_pointer.C
b/gcc/testsuite/g++.dg/ext/add_pointer.C
new file mode 100644
index 00000000000..e35873553c8
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/add_pointer.C
@@ -0,0 +1,46 @@
+// { dg-do compile { target c++11 } }
+
+#define SA(X) static_assert((X),#X)
+
+SA(__is_same(__add_pointer(int), int*));
+SA(__is_same(__add_pointer(const int), const int*));
+SA(__is_same(__add_pointer(volatile int), volatile int*));
+SA(__is_same(__add_pointer(const volatile int), const volatile int*));
+
+SA(__is_same(__add_pointer(int*), int**));
+SA(__is_same(__add_pointer(const int*), const int**));
+SA(__is_same(__add_pointer(volatile int*), volatile int**));
+SA(__is_same(__add_pointer(const volatile int*), const volatile int**));
+
+SA(__is_same(__add_pointer(int* const), int* const*));
+SA(__is_same(__add_pointer(int* volatile), int* volatile*));
+SA(__is_same(__add_pointer(int* const volatile), int* const volatile*));
+
+SA(__is_same(__add_pointer(int&), int*));
+SA(__is_same(__add_pointer(const int&), const int*));
+SA(__is_same(__add_pointer(volatile int&), volatile int*));
+SA(__is_same(__add_pointer(const volatile int&), const volatile int*));
+
+SA(__is_same(__add_pointer(int&&), int*));
+SA(__is_same(__add_pointer(const int&&), const int*));
+SA(__is_same(__add_pointer(volatile int&&), volatile int*));
+SA(__is_same(__add_pointer(const volatile int&&), const volatile int*));
+
+SA(__is_same(__add_pointer(int[3]), int(*)[3]));
+SA(__is_same(__add_pointer(const int[3]), const int(*)[3]));
+SA(__is_same(__add_pointer(volatile int[3]), volatile int(*)[3]));
+SA(__is_same(__add_pointer(const volatile int[3]), const volatile int(*)[3]));
+
+SA(__is_same(__add_pointer(int(*)[3]), int(**)[3]));
+SA(__is_same(__add_pointer(const int(*)[3]), const int(**)[3]));
+SA(__is_same(__add_pointer(volatile int(*)[3]), volatile int(**)[3]));
+SA(__is_same(__add_pointer(const volatile int(*)[3]), const volatile
int(**)[3]));
+
+SA(__is_same(__add_pointer(int(* const)[3]), int(* const*)[3]));
+SA(__is_same(__add_pointer(int(* volatile)[3]), int(* volatile*)[3]));
+SA(__is_same(__add_pointer(int(* const volatile)[3]), int(* const
volatile*)[3]));
+
+SA(__is_same(__add_pointer(int(int)), int(*)(int)));
+SA(__is_same(__add_pointer(int(* const)(int)), int(* const*)(int)));
+SA(__is_same(__add_pointer(int(* volatile)(int)), int(* volatile*)(int)));
+SA(__is_same(__add_pointer(int(* const volatile)(int)), int(* const
volatile*)(int)));
diff --git a/gcc/testsuite/g++.dg/ext/has-builtin-1.C
b/gcc/testsuite/g++.dg/ext/has-builtin-1.C
index f343e153e56..bed4f932bfa 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 (__add_pointer)
+# error "__has_builtin (__add_pointer) failed"
+#endif
next reply other threads:[~2023-03-20 7:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-20 7:44 Ken Matsui [this message]
2023-03-21 9:49 ` Ken Matsui
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