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std::type_index::operator==,!=,<,<=,>,>=,<=>

bool operator==( const type_index& rhs ) const noexcept;
 (1) (since C++11) 
bool operator!=( const type_index& rhs ) const noexcept;
 (2) (since C++11)
(until C++20)		 
bool operator<( const type_index& rhs ) const noexcept;
 (3) (since C++11) 
bool operator<=( const type_index& rhs ) const noexcept;
 (4) (since C++11) 
bool operator>( const type_index& rhs ) const noexcept;
 (5) (since C++11) 
bool operator>=( const type_index& rhs ) const noexcept;
 (6) (since C++11) 
std::strong_ordering operator<=>( const type_index& rhs ) const noexcept;
 (7) (since C++20)

Compares the underlying std::type_info objects.

1,2) Checks whether the underlying std::type_info objects refer to the same type.
3-7) Compares the underlying std::type_info objects as defined by an implementation-defined ordering. The comparison is done by type_info::before.

The != operator is synthesized from operator==.

 (since C++20)

Parameters

rhs - another type_index object to compare to

Return value

1) true if the underlying std::type_info objects refer to the same type, false otherwise.
2) true if the underlying std::type_info objects refer not to the same type, false otherwise.
3-6) true if the types referred by the underlying std::type_info objects are ordered by corresponding order, false otherwise.
7) std::strong_ordering::equal if the underlying std::type_info objects refer to the same type, otherwise std::strong_ordering::less if *this's underlying std::type_info object precedes rhs's in the implementation-defined ordering, otherwise std::strong_ordering::greater.

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