9d2b80ea51
When fixing c++/91889 (r276251) I was assuming that we couldn't have a ck_qual
under a ck_ref_bind, and I was introducing it in the patch and so this
+ if (next_conversion (convs)->kind == ck_qual)
+ {
+ gcc_assert (same_type_p (TREE_TYPE (expr),
+ next_conversion (convs)->type));
+ /* Strip the cast created by the ck_qual; cp_build_addr_expr
+ below expects an lvalue. */
+ STRIP_NOPS (expr);
+ }
in convert_like_real was supposed to handle it. But that assumption was wrong
as this test shows; here we have "(int *)f" where f is of type long int, and
we're converting it to "const int *const &", so we have both ck_ref_bind and
ck_qual. That means that the new STRIP_NOPS strips an expression it shouldn't
have, and that then breaks when creating a TARGET_EXPR. So we want to limit
the stripping to the new case only. This I do by checking need_temporary_p,
which will be 0 in the new case. Yes, we can set need_temporary_p when
binding a reference directly, but then we won't have a qualification
conversion. It is possible to have a bit-field, convert it to a pointer,
and then convert that pointer to a more-qualified pointer, but in that case
we're not dealing with an lvalue, so gl_kind is 0, so we won't enter this
block in reference_binding:
1747 if ((related_p || compatible_p) && gl_kind)
* call.c (convert_like_real) <case ck_ref_bind>: Check need_temporary_p.
* g++.dg/cpp0x/ref-bind7.C: New test.
From-SVN: r278416
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