acb35c0272
The reasoning is that this construct is accepted by all compilers and valid in C++11, so it doesn't seem like a useful warning to have enabled by default. Building with -pedantic, -Wbind-to-temporary-copy, or -Wc++98-compat still shows the warning. The motivation is that I built re2, and this was the only warning that was emitted during the build. Both changing re2 to fix the warning and detecting clang and suppressing the warning in re2's build seem inferior than just giving the compiler a good default for this warning. Also move the cxx98compat version of this warning to CXX98CompatPedantic, and update tests accordingly. llvm-svn: 218008
36 lines
2.0 KiB
C++
36 lines
2.0 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -std=c++11 -Wc++98-compat-pedantic -verify %s
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// RUN: %clang_cc1 -fsyntax-only -std=c++11 -Wc++98-compat-pedantic -Wno-bind-to-temporary-copy -Wno-unnamed-type-template-args -Wno-local-type-template-args -Werror %s
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template<typename T> int TemplateFn(T) { return 0; }
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void LocalTemplateArg() {
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struct S {};
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TemplateFn(S()); // expected-warning {{local type 'S' as template argument is incompatible with C++98}}
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}
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struct {} obj_of_unnamed_type; // expected-note {{here}}
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int UnnamedTemplateArg = TemplateFn(obj_of_unnamed_type); // expected-warning {{unnamed type as template argument is incompatible with C++98}}
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namespace CopyCtorIssues {
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struct Private {
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Private();
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private:
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Private(const Private&); // expected-note {{declared private here}}
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};
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struct NoViable {
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NoViable();
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NoViable(NoViable&); // expected-note {{not viable}}
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};
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struct Ambiguous {
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Ambiguous();
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Ambiguous(const Ambiguous &, int = 0); // expected-note {{candidate}}
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Ambiguous(const Ambiguous &, double = 0); // expected-note {{candidate}}
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};
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struct Deleted {
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Private p; // expected-note {{copy constructor of 'Deleted' is implicitly deleted because field 'p' has an inaccessible copy constructor}}
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};
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const Private &a = Private(); // expected-warning {{copying variable of type 'CopyCtorIssues::Private' when binding a reference to a temporary would invoke an inaccessible constructor in C++98}}
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const NoViable &b = NoViable(); // expected-warning {{copying variable of type 'CopyCtorIssues::NoViable' when binding a reference to a temporary would find no viable constructor in C++98}}
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const Ambiguous &c = Ambiguous(); // expected-warning {{copying variable of type 'CopyCtorIssues::Ambiguous' when binding a reference to a temporary would find ambiguous constructors in C++98}}
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const Deleted &d = Deleted(); // expected-warning {{copying variable of type 'CopyCtorIssues::Deleted' when binding a reference to a temporary would invoke a deleted constructor in C++98}}
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}
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