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diff --git a/docs/UsersManual.html b/docs/UsersManual.html index a53a1af5ff..c19c96b4bc 100644 --- a/docs/UsersManual.html +++ b/docs/UsersManual.html @@ -410,6 +410,42 @@ because it's hard to work around, Clang downgrades it to a warning as an extension.</p> </dd> +<!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - --> +<dt id="opt_Wbind-to-temporary-copy"><b>-Wbind-to-temporary-copy</b>: Warn about +an unusable copy constructor when binding a reference to a temporary.</dt> +<dd>This option, which defaults to on, enables warnings about binding a +reference to a temporary when the temporary doesn't have a usable copy +constructor. For example:</p> + +<pre> + struct NonCopyable { + NonCopyable(); + private: + NonCopyable(const NonCopyable&); + }; + void foo(const NonCopyable&); + void bar() { + foo(NonCopyable()); // Disallowed in C++98; allowed in C++0x. + } +</pre> +<pre> + struct NonCopyable2 { + NonCopyable2(); + NonCopyable2(NonCopyable2&); + }; + void foo(const NonCopyable2&); + void bar() { + foo(NonCopyable2()); // Disallowed in C++98; allowed in C++0x. + } +</pre> + +<p>Note that if <tt>NonCopyable2::NonCopyable2()</tt> has a default +argument whose instantiation produces a compile error, that error will +still be a hard error in C++98 mode even if this warning is turned +off.</p> + +</dd> + </dl> <!-- ======================================================================= --> |