c151225096
Implement P2128R6 in C++23 mode. Unlike GCC's implementation, this doesn't try to recover when a user meant to use a comma expression. Because the syntax changes meaning in C++23, the patch is *NOT* implemented as an extension. Instead, declaring an array with not exactly 1 parameter is an error in older languages modes. There is an off-by-default extension warning in C++23 mode. Unlike the standard, we supports default arguments; Ie, we assume, based on conversations in WG21, that the proposed resolution to CWG2507 will be accepted. We allow arrays OpenMP sections and C++23 multidimensional array to coexist: [a , b] multi dimensional array [a : b] open mp section [a, b: c] // error The rest of the patch is relatively straight forward: we take care to support an arbitrary number of arguments everywhere.
42 lines
898 B
C++
42 lines
898 B
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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// RUN: %clang_cc1 -fsyntax-only -verify -std=c++2b %s
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struct Sub0 {
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int &operator[](int);
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};
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struct Sub1 {
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long &operator[](long); // expected-note{{candidate function}}
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};
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struct ConvertibleToInt {
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operator int();
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};
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template<typename T, typename U, typename Result>
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struct Subscript0 {
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void test(T t, U u) {
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Result &result = t[u]; // expected-error{{no viable overloaded operator[] for type}}
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}
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};
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template struct Subscript0<int*, int, int&>;
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template struct Subscript0<Sub0, int, int&>;
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template struct Subscript0<Sub1, ConvertibleToInt, long&>;
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template struct Subscript0<Sub1, Sub0, long&>; // expected-note{{instantiation}}
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// PR5345
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template <typename T>
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struct S {
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bool operator[](int n) const { return true; }
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};
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template <typename T>
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void Foo(const S<int>& s, T x) {
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if (s[0]) {}
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}
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void Bar() {
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Foo(S<int>(), 0);
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}
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