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| author | Ken Matsui <kmatsui@gcc.gnu.org> | 2024-02-14 23:21:35 -0800 |
|---|---|---|
| committer | Ken Matsui <kmatsui@gcc.gnu.org> | 2024-05-10 18:17:09 -0700 |
| commit | c08d1afbf539a672f28100640d964565ac575ff5 (patch) | |
| tree | 3330da5efbd56bb86ae49251361d68cbebf9ba7c | |
| parent | 86812be98a129ac9923df5dfb6b457bfe28e9e8c (diff) | |
| download | gcc-c08d1afbf539a672f28100640d964565ac575ff5.zip gcc-c08d1afbf539a672f28100640d964565ac575ff5.tar.gz gcc-c08d1afbf539a672f28100640d964565ac575ff5.tar.bz2 | |
c++: Implement __add_lvalue_reference built-in trait
This patch implements built-in trait for std::add_lvalue_reference.
gcc/cp/ChangeLog:
* cp-trait.def: Define __add_lvalue_reference.
* semantics.cc (finish_trait_type): Handle
CPTK_ADD_LVALUE_REFERENCE.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of
__add_lvalue_reference.
* g++.dg/ext/add_lvalue_reference.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
Reviewed-by: Jason Merrill <jason@redhat.com>
| -rw-r--r-- | gcc/cp/cp-trait.def | 1 | ||||
| -rw-r--r-- | gcc/cp/semantics.cc | 6 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/ext/add_lvalue_reference.C | 21 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/ext/has-builtin-1.C | 3 |
4 files changed, 31 insertions, 0 deletions
diff --git a/gcc/cp/cp-trait.def b/gcc/cp/cp-trait.def index 933c8bc..9a27dca 100644 --- a/gcc/cp/cp-trait.def +++ b/gcc/cp/cp-trait.def @@ -48,6 +48,7 @@ #define DEFTRAIT_TYPE_DEFAULTED #endif +DEFTRAIT_TYPE (ADD_LVALUE_REFERENCE, "__add_lvalue_reference", 1) DEFTRAIT_TYPE (ADD_POINTER, "__add_pointer", 1) DEFTRAIT_EXPR (HAS_NOTHROW_ASSIGN, "__has_nothrow_assign", 1) DEFTRAIT_EXPR (HAS_NOTHROW_CONSTRUCTOR, "__has_nothrow_constructor", 1) diff --git a/gcc/cp/semantics.cc b/gcc/cp/semantics.cc index c2ab08c..a6f795d 100644 --- a/gcc/cp/semantics.cc +++ b/gcc/cp/semantics.cc @@ -12924,6 +12924,12 @@ finish_trait_type (cp_trait_kind kind, tree type1, tree type2, switch (kind) { + case CPTK_ADD_LVALUE_REFERENCE: + /* [meta.trans.ref]. */ + if (referenceable_type_p (type1)) + return cp_build_reference_type (type1, /*rval=*/false); + return type1; + case CPTK_ADD_POINTER: /* [meta.trans.ptr]. */ if (VOID_TYPE_P (type1) || referenceable_type_p (type1)) diff --git a/gcc/testsuite/g++.dg/ext/add_lvalue_reference.C b/gcc/testsuite/g++.dg/ext/add_lvalue_reference.C new file mode 100644 index 0000000..8fe1e03 --- /dev/null +++ b/gcc/testsuite/g++.dg/ext/add_lvalue_reference.C @@ -0,0 +1,21 @@ +// { dg-do compile { target c++11 } } + +#define SA(X) static_assert((X),#X) + +class ClassType { }; + +SA(__is_same(__add_lvalue_reference(int), int&)); +SA(__is_same(__add_lvalue_reference(int&), int&)); +SA(__is_same(__add_lvalue_reference(const int), const int&)); +SA(__is_same(__add_lvalue_reference(int*), int*&)); +SA(__is_same(__add_lvalue_reference(ClassType&), ClassType&)); +SA(__is_same(__add_lvalue_reference(ClassType), ClassType&)); +SA(__is_same(__add_lvalue_reference(int(int)), int(&)(int))); +SA(__is_same(__add_lvalue_reference(int&&), int&)); +SA(__is_same(__add_lvalue_reference(ClassType&&), ClassType&)); +SA(__is_same(__add_lvalue_reference(void), void)); +SA(__is_same(__add_lvalue_reference(const void), const void)); +SA(__is_same(__add_lvalue_reference(bool(int) const), bool(int) const)); +SA(__is_same(__add_lvalue_reference(bool(int) &), bool(int) &)); +SA(__is_same(__add_lvalue_reference(bool(int) const &&), bool(int) const &&)); +SA(__is_same(__add_lvalue_reference(bool(int)), bool(&)(int))); diff --git a/gcc/testsuite/g++.dg/ext/has-builtin-1.C b/gcc/testsuite/g++.dg/ext/has-builtin-1.C index f0b165e..a8b2f0f 100644 --- a/gcc/testsuite/g++.dg/ext/has-builtin-1.C +++ b/gcc/testsuite/g++.dg/ext/has-builtin-1.C @@ -2,6 +2,9 @@ // { dg-do compile } // Verify that __has_builtin gives the correct answer for C++ built-ins. +#if !__has_builtin (__add_lvalue_reference) +# error "__has_builtin (__add_lvalue_reference) failed" +#endif #if !__has_builtin (__add_pointer) # error "__has_builtin (__add_pointer) failed" #endif |