Coliru

• Test empty index_sequence
  • Simplified

• Variant with hierarchy and partial overloading
  • Modified
• Access enum as constant expression
• enum class casting rules
• Test constexpr with template functor
• Change variable in parameter pack expansion
• Pitfalls of bitset::operator
• non_negative
• one_of, C++14
• Optional automatic determination of template parameter
• Non-const constexpr member function
• make_switch
• constexpr: Use tag dispatching for runtime/compile-time path
• constexpr: Default generated constructors
• Atomic add float
• Unique type for each generated element of class
• Struct designated initializers

String Proxy Puzzle

• Trial 1
• Trial 2 (hash)