abc8812df0
This is an implementation of P1061 Structure Bindings Introduce a Pack without the ability to use packs outside of templates. There is a couple of ways the AST could have been sliced so let me know what you think. The only part of this change that I am unsure of is the serialization/deserialization stuff. I followed the implementation of other Exprs, but I do not really know how it is tested. Thank you for your time considering this. --------- Co-authored-by: Yanzuo Liu <zwuis@outlook.com>
57 lines
1.5 KiB
C++
57 lines
1.5 KiB
C++
// RUN: %clang_cc1 -std=c++26 -triple x86_64-linux-gnu -emit-llvm -o - %s | FileCheck %s
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namespace std {
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using size_t = decltype(sizeof(0));
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template<typename> struct tuple_size;
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template<size_t, typename> struct tuple_element;
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}
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struct Y { int n; };
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struct X { X(); X(Y); X(const X&); ~X(); };
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struct A { int a : 13; bool b; };
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struct B {};
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template<> struct std::tuple_size<B> { enum { value = 2 }; };
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template<> struct std::tuple_element<0,B> { using type = X; };
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template<> struct std::tuple_element<1,B> { using type = const int&; };
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template<int N> auto get(B) {
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if constexpr (N == 0)
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return Y();
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else
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return 0.0;
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}
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using C = int[2];
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template<typename T> T &make();
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// CHECK-LABEL: define {{.*}} @_Z8big_testIiEiv()
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template <typename T>
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int big_test() {
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A& a = make<A>();
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A:
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auto &[...an] = a;
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an...[0] = 5;
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// CHECK: %[[a1:.*]].load = load i16, ptr %[[BITFIELD:.*]],
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// CHECK: %[[a1]].clear = and i16 %[[a1]].load, -8192
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// CHECK: %[[a1]].set = or i16 %[[a1]].clear, 5
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// CHECK: store i16 %[[a1]].set, ptr %[[BITFIELD]],
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B:
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auto [b1, ...bn] = make<B>();
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// CHECK: @_Z4makeI1BERT_v()
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// CHECK: call i32 @_Z3getILi0EEDa1B()
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// CHECK: call void @_ZN1XC1E1Y(ptr {{[^,]*}} %[[b1:.*]], i32
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//
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// CHECK: call noundef double @_Z3getILi1EEDa1B()
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// CHECK: %[[cvt:.*]] = fptosi double %{{.*}} to i32
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// CHECK: store i32 %[[cvt]], ptr %[[b2:.*]],
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// CHECK: store ptr %[[b2]], ptr %[[b2ref:.*]],
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int bn2 = bn...[0];
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// CHECK load ptr, ptr %[[b2ref]]
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return 0;
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}
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int g = big_test<int>();
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