Type trait to check if istream operator>> exists for given type...

How does `decltype(true ? std::declval<T1>() : std::declval<T2>())` works?...

Is there a reason declval returns add_rvalue_reference instead of add_lvalue_reference...

How does std::declval<T>() work?...

Understanding declval function a little further...

error: use of 'decltype(auto) X before deduction of 'auto' (for generated lambda)...

Is it legal to use std::declval in lambda in unevaluated contexts?...

Why does std::declval add a reference?...

Use invoke_result with void argument type?...

std::reference_wrapper, constructor implementation explaination...

What is meant by the statement that std::declval cannot be called?...

Why does the implementation of declval in libstdc++-v3 look so complicated?...

Compiler infering the template argument...

Does T have to be a complete type to be used in `std::declval<T>`?...

For what T does `std::declval<T>()` not have a matching function?...

std::declval vs crtp, cannot deduce method return type from incomplete type...

Understanding declval optimized implementation...

Can I use declval to Construct an Unused Return?...

Is There a declval for Function Pointers?...

How to use decltype as the LHS of a larger type expression when compiling under VS2010-VS2015...

How should this c++ typedef using decltype and declval be written to make it portable?...

Concepts/SFINAE error with typename...

detection idiom and default parameter type match...

Zero Initialize a Type...

How do we test if an expression of a certain type can be invoked with a prvalue?...