Types
• plus
• minus
• multiplies
(formerly called times )
• divides
• modulus
• negate
• equal_to
• not_equal_to
• greater
• less
• greater_equal
• less_equal
• logical_and
• logical_or
• logical_not
• subtractive_rng
• identity
• project1st
• project2nd
• select1st
• select2nd
• unary_function
• binary_function
• unary_compose
• binary_compose
• unary_negate
• binary_negate
• binder1st
• binder2nd
• pointer_to_unary_function
• pointer_to_binary_function