00c9dfdfd0
Summary: This is a side-effect brought in by p0620r0, which allows other placeholder types (derived from `auto` and `decltype(auto)`) to be usable in a `new` expression with a single-clause //braced-init-list// as its initializer (8.3.4 [expr.new]/2). N3922 defined its semantics. References: http://wg21.link/p0620r0 http://wg21.link/n3922 Reviewers: rsmith, aaron.ballman Reviewed By: rsmith Subscribers: cfe-commits Differential Revision: https://reviews.llvm.org/D39451 llvm-svn: 320401
28 lines
1.0 KiB
C++
28 lines
1.0 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++11
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template<typename T>
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struct only {
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only(T);
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template<typename U> only(U) = delete;
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};
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void f() {
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only<const int*> p = new const auto (0);
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only<double*> q = new (auto) (0.0);
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only<char*> r = new auto {'a'};
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new auto; // expected-error{{new expression for type 'auto' requires a constructor argument}}
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new (const auto)(); // expected-error{{new expression for type 'const auto' requires a constructor argument}}
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new (auto) (1,2,3); // expected-error{{new expression for type 'auto' contains multiple constructor arguments}}
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new auto {}; // expected-error{{new expression for type 'auto' requires a constructor argument}}
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new auto {1,2,3}; // expected-error{{new expression for type 'auto' contains multiple constructor arguments}}
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new auto ({1,2,3}); // expected-error{{new expression for type 'auto' contains multiple constructor arguments}}
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}
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void p2example() {
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only<int*> r = new auto(1);
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auto x = new auto('a');
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only<char*> testX = x;
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}
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