re PR c++/49924 ([C++0X] [constexpr] can't initialize a non-static member array of a literal type as a constexpr)
PR c++/49924 * semantics.c (cxx_eval_vec_init_1): Fix logic. From-SVN: r177073
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2011-08-01 Jason Merrill <jason@redhat.com>
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PR c++/49924
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* semantics.c (cxx_eval_vec_init_1): Fix logic.
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PR c++/49813
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* semantics.c (potential_constant_expression_1): Allow any builtin.
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(morally_constexpr_builtin_function_p): Remove.
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@ -6651,6 +6651,7 @@ cxx_eval_vec_init_1 (const constexpr_call *call, tree atype, tree init,
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tree elttype = TREE_TYPE (atype);
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int max = tree_low_cst (array_type_nelts (atype), 0);
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VEC(constructor_elt,gc) *n = VEC_alloc (constructor_elt, gc, max + 1);
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bool pre_init = false;
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int i;
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/* For the default constructor, build up a call to the default
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@ -6658,8 +6659,15 @@ cxx_eval_vec_init_1 (const constexpr_call *call, tree atype, tree init,
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here, as for a constructor to be constexpr, all members must be
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initialized, which for a defaulted default constructor means they must
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be of a class type with a constexpr default constructor. */
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if (value_init)
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gcc_assert (!init);
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if (TREE_CODE (elttype) == ARRAY_TYPE)
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/* We only do this at the lowest level. */;
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else if (value_init)
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{
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init = build_value_init (elttype, tf_warning_or_error);
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init = cxx_eval_constant_expression
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(call, init, allow_non_constant, addr, non_constant_p);
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pre_init = true;
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}
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else if (!init)
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{
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VEC(tree,gc) *argvec = make_tree_vector ();
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@ -6669,6 +6677,7 @@ cxx_eval_vec_init_1 (const constexpr_call *call, tree atype, tree init,
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release_tree_vector (argvec);
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init = cxx_eval_constant_expression (call, init, allow_non_constant,
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addr, non_constant_p);
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pre_init = true;
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}
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if (*non_constant_p && !allow_non_constant)
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@ -6690,17 +6699,14 @@ cxx_eval_vec_init_1 (const constexpr_call *call, tree atype, tree init,
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allow_non_constant, addr,
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non_constant_p);
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}
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else if (value_init)
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else if (pre_init)
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{
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eltinit = build_value_init (elttype, tf_warning_or_error);
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eltinit = cxx_eval_constant_expression
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(call, eltinit, allow_non_constant, addr, non_constant_p);
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}
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else if (TREE_CODE (init) == CONSTRUCTOR)
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{
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/* Initializing an element using the call to the default
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constructor we just built above. */
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eltinit = unshare_expr (init);
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/* Initializing an element using value or default initialization
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we just pre-built above. */
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if (i == 0)
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eltinit = init;
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else
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eltinit = unshare_expr (init);
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}
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else
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{
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@ -1,5 +1,8 @@
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2011-08-01 Jason Merrill <jason@redhat.com>
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PR c++/49924
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* g++.dg/cpp0x/constexpr-array4.C: New.
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PR c++/49813
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* g++.dg/cpp0x/constexpr-builtin1.C: New.
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@ -0,0 +1,14 @@
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// PR c++/49924
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// { dg-options -std=c++0x }
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struct A { constexpr A() { } };
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struct B {
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A array[1]; //non-static member array of a literal type w constexpr ctor
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constexpr B() : array{} { } // here is the problem
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};
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int main()
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{
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constexpr B b{}; // won't compile
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}
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