The first formal parameter in an Ada procedure -


from ada2012 reference manual:

arm2012.html/rm-4-1-3.html

a selected_component not expanded name shall resolve denote 1 of following:

  • a view of subprogram first formal parameter of tagged type or access parameter designated type tagged:

why significant have first formal parameter?

please explain examples.

the definition in 4.1.3 selected components, 9.1/2 provides prefixed notation, allows 1 invoke primitive operations of tagged type without mentioning enclosing package explicitly. related example seen here.


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