derek.holloway
7502bf64a4
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31 lines
2.1 KiB
C++
31 lines
2.1 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++14
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// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++17 -pedantic
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// [expr.new]p2 ... the invented declaration: T x init ;
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// C++23 [dcl.type.auto.deduct]p2.2
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// For a variable declared with a type that contains a placeholder type, T is the declared type of the variable.
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void f() {
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// - If the initializer is a parenthesized expression-list, the expression-list shall be a single assignmentexpression and E is the assignment-expression.
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new auto('a');
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new decltype(auto)('a');
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// - If the initializer is a braced-init-list, it shall consist of a single brace-enclosed assignment-expression and E is the assignment-expression.
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new auto{2};
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new decltype(auto){2};
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new auto{}; // expected-error{{new expression for type 'auto' requires a constructor argument}}
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new auto({}); // expected-error{{cannot deduce actual type for 'auto' from parenthesized initializer list}}
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new auto{{}}; // expected-error{{cannot deduce actual type for 'auto' from nested initializer list}}
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new auto({2}); // expected-error{{cannot deduce actual type for 'auto' from parenthesized initializer list}}
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new auto{{2}}; // expected-error{{cannot deduce actual type for 'auto' from nested initializer list}}
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new auto{1, 2}; // expected-error{{new expression for type 'auto' contains multiple constructor arguments}}
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new decltype(auto){}; // expected-error{{new expression for type 'decltype(auto)' requires a constructor argument}}
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new decltype(auto)({}); // expected-error{{cannot deduce actual type for 'decltype(auto)' from parenthesized initializer list}}
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new decltype(auto){{}}; // expected-error{{cannot deduce actual type for 'decltype(auto)' from nested initializer list}}
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new decltype(auto)({1}); // expected-error{{cannot deduce actual type for 'decltype(auto)' from parenthesized initializer list}}
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new decltype(auto){1, 2}; // expected-error{{new expression for type 'decltype(auto)' contains multiple constructor arguments}}
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new decltype(auto)({1, 2}); // expected-error{{cannot deduce actual type for 'decltype(auto)' from parenthesized initializer list}}
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}
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