Weird function names in Quartz Core: what gives?

Out of curiosity, what may the rationale behind these function names (found in Apple's Quartz Core framework) be?

• ZN2CA11Transaction17observer开发者_JAVA技巧_callbackEP19__CFRunLoopObservermPv()
• ZNK2CA6Render9Animation9next_timeEdRd()
• ZN2CA11GenericRectIiE5insetEii()

Do you think the developers somehow encoded argument types in function names? How do you find yourself putting "EP19" in there in the course of day-to-day coding? In what circumstances do such barely readable function names actually help you read code and otherwise be more productive?

Thanks in advance for any hints, and Merry Christmas!

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These 'mangled' names are automatically generated by the C++ compiler and indeed encode type information.