On 1/22/26 6:19 AM, Marek Polacek wrote:
Bootstrapped/regtested on x86_64-pc-linux-gnu, ok for trunk?
OK.
-- >8 --
A user-provided function is a user-declared function that is
not explicitly defaulted or deleted on its first declaration
([dcl.fct.def.default]). So,
void bar (int, long) = delete;
in namespace scope should not be user-provided. But user_provided_p
was mistakenly returning true for this case, so eval_is_user_provided
had to work around that.
This patch corrects user_provided_p. It makes use of the fact that
a function deleted after its first declaration is ill-formed
rather than user-provided:
void f();
void f() = delete; // error, not first declaration
gcc/cp/ChangeLog:
* class.cc (user_provided_p): Return false for a deleted
namespace-scope function.
* reflect.cc (eval_is_user_provided): Don't check
DECL_NAMESPACE_SCOPE_P or DECL_DELETED_FN.
---
gcc/cp/class.cc | 9 +++++++--
gcc/cp/reflect.cc | 6 +-----
2 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/gcc/cp/class.cc b/gcc/cp/class.cc
index c610236f260..6f00ca671e4 100644
--- a/gcc/cp/class.cc
+++ b/gcc/cp/class.cc
@@ -5726,7 +5726,7 @@ in_class_defaulted_default_constructor (tree t)
}
/* Returns true iff FN is a user-provided function, i.e. user-declared
- and not defaulted at its first declaration. */
+ and not explicitly defaulted or deleted on its first declaration. */
bool
user_provided_p (tree fn)
@@ -5734,7 +5734,12 @@ user_provided_p (tree fn)
fn = STRIP_TEMPLATE (fn);
return (!DECL_ARTIFICIAL (fn)
&& !(DECL_INITIALIZED_IN_CLASS_P (fn)
- && (DECL_DEFAULTED_FN (fn) || DECL_DELETED_FN (fn))));
+ && (DECL_DEFAULTED_FN (fn) || DECL_DELETED_FN (fn)))
+ /* At namespace scope,
+ void f () = delete;
+ is *not* user-provided (and any function deleted after its first
+ declaration is ill-formed). */
+ && !(DECL_NAMESPACE_SCOPE_P (fn) && DECL_DELETED_FN (fn)));
}
/* Returns true iff class T has a user-provided constructor. */
diff --git a/gcc/cp/reflect.cc b/gcc/cp/reflect.cc
index 0b0fc2769d8..788c00c6f30 100644
--- a/gcc/cp/reflect.cc
+++ b/gcc/cp/reflect.cc
@@ -1780,11 +1780,7 @@ static tree
eval_is_user_provided (tree r)
{
r = maybe_get_first_fn (r);
- if (TREE_CODE (r) == FUNCTION_DECL
- && user_provided_p (r)
- // TODO: user_provided_p is false for non-members defaulted on
- // first declaration.
- && (!DECL_NAMESPACE_SCOPE_P (r) || !DECL_DELETED_FN (r)))
+ if (TREE_CODE (r) == FUNCTION_DECL && user_provided_p (r))
return boolean_true_node;
else
return boolean_false_node;
base-commit: 59b9ec2d24e60a49d84f874dfe1e947ad1f8ff22
