bf8d83098f
P1064R0 - Allowing Virtual Function Calls in Constant Expressions * call.c (build_over_call): No longer check if we're outside a template function. * class.c (build_vtbl_initializer): Build vtable's constructor with indexes. * constexpr.c (cxx_eval_constant_expression): Don't ignore _vptr's initializer. Handle OBJ_TYPE_REF. (potential_constant_expression_1): Handle OBJ_TYPE_REF. * decl.c (maybe_commonize_var): Bail out for any DECL_ARTIFICIAL. (initialize_artificial_var): Mark the variable as constexpr. (grokdeclarator): Change error to pedwarn. Only warn when pedantic and not C++2a. * gimple-fold.c (gimple_get_virt_method_for_vtable): Adjust assert. * g++.dg/cpp0x/constexpr-virtual5.C: Adjust dg-error. * g++.dg/cpp2a/constexpr-virtual1.C: New test. * g++.dg/cpp2a/constexpr-virtual2.C: New test. * g++.dg/cpp2a/constexpr-virtual3.C: New test. * g++.dg/cpp2a/constexpr-virtual4.C: New test. * g++.dg/cpp2a/constexpr-virtual5.C: New test. * g++.dg/cpp2a/constexpr-virtual6.C: New test. * g++.dg/cpp2a/constexpr-virtual7.C: New test. * g++.dg/cpp2a/constexpr-virtual8.C: New test. * g++.dg/cpp2a/constexpr-virtual9.C: New test. * g++.dg/diagnostic/virtual-constexpr.C: Skip for C++2a. Use -pedantic-errors. Adjust dg-error. From-SVN: r264408
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
// P1064R0
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// { dg-do compile }
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// { dg-options "-std=c++2a" }
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struct X1
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{
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virtual int f() const = 0;
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virtual int f(int) const = 0;
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virtual int f(int, int) const = 0;
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};
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struct X2: public X1
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{
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constexpr virtual int f() const { return 2; }
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constexpr virtual int f(int) const { return 12; }
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constexpr virtual int f(int, int) const { return 22; }
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};
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struct X3: public X2
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{
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virtual int f() const { return 3; }
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virtual int f(int) const { return 13; }
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virtual int f(int, int) const { return 23; }
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};
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struct X4: public X3
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{
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constexpr virtual int f() const { return 4; }
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constexpr virtual int f(int) const { return 14; }
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constexpr virtual int f(int, int) const { return 24; }
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};
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constexpr int (X1::*pf)() const = &X1::f;
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constexpr int (X1::*pf1)(int) const = &X1::f;
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constexpr int (X1::*pf2)(int, int) const = &X1::f;
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constexpr X2 x2;
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static_assert(x2.f() == 2);
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static_assert((x2.*pf)() == 2);
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static_assert(x2.f(1) == 12);
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static_assert((x2.*pf1)(1) == 12);
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static_assert(x2.f(1, 2) == 22);
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static_assert((x2.*pf2)(1, 2) == 22);
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constexpr X1 const& r2 = x2;
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static_assert(r2.f() == 2);
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static_assert((r2.*pf)() == 2);
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static_assert(r2.f(1) == 12);
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static_assert((r2.*pf1)(1) == 12);
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static_assert(r2.f(1, 2) == 22);
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static_assert((r2.*pf2)(1, 2) == 22);
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constexpr X1 const* p2 = &x2;
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static_assert(p2->f() == 2);
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static_assert((p2->*pf)() == 2);
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static_assert(p2->f(1) == 12);
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static_assert((p2->*pf1)(1) == 12);
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static_assert(p2->f(1, 2) == 22);
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static_assert((p2->*pf2)(1, 2) == 22);
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constexpr X4 x4;
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static_assert(x4.f() == 4);
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static_assert((x4.*pf)() == 4);
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static_assert(x4.f(1) == 14);
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static_assert((x4.*pf1)(1) == 14);
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static_assert(x4.f(1, 2) == 24);
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static_assert((x4.*pf2)(1, 2) == 24);
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constexpr X1 const& r4 = x4;
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static_assert(r4.f() == 4);
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static_assert((r4.*pf)() == 4);
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static_assert(r4.f(1) == 14);
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static_assert((r4.*pf1)(1) == 14);
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static_assert(r4.f(1, 2) == 24);
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static_assert((r4.*pf2)(1, 2) == 24);
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constexpr X1 const* p4 = &x4;
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static_assert(p4->f() == 4);
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static_assert((p4->*pf)() == 4);
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static_assert(p4->f(1) == 14);
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static_assert((p4->*pf1)(1) == 14);
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static_assert(p4->f(1, 2) == 24);
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static_assert((p4->*pf2)(1, 2) == 24);
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