Sunday, June 7, 2009

primitive^class type, pbclone, pbref...

java has primitive vs reference types; c++ has builtin/primitive vs class data types. For a beginner, it's best NOT to think of these c++ features in java terms. To a beginner sometimes I'd say C++ builtin/primitive and class types are very very different from java primitive and reference types.

Like C language, both builtin and class types are, by default, pass-by-clone (pbclone) -- See post on "function border". Both builtin and class types can become pbref..

Note this blog is mostly about memory. Pretend to be an snooper on the memory space in the runtime. What differences do we notice when builtin or class type variables are created, destroyed, passed, cloned...

obviously a class type can contain pointers. If a struct contains nonref (non-reference types) fields only, then it's quite similar to a double or char primitive.

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