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10 Cards in this Set
- Front
- Back
opaque data type |
in c you typedef a type and hide its implementation to the users you should be able to pass thiz objecf around but wont ne able to refer to a subobject inside this allows one to change the implementation if needed typedef struct zhash *zhasht typedef zhasht myhash myhasht foo (); caller can myhasht a = foo() i don't reallg like hiding the pointer into a typedef... ompd is a prime example |
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errno handling |
need to read upon this |
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c standard runtime library call |
typically return -1 or NULL to indicate and error cindtion and set errno so that caller can do perror or strerror(errno) |
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c++ type casting |
static_cast dynamic_cast reinterprete_cast upcast is always safe downcast is inlu safe with dynamic_cast reinterprete_cast hammer this can be used in void* C cast is similar to combining static and dynamic thkugb not encourages |
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how a c++ object constructex |
from base constructor to derive constructor
desruction from derive to base
multiple bases left most members in sequence |
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templates |
fancy m4 compilers have hard time to instantiate for which types a class needs to be parameterized typically the body is defined in the header so when the template is instantiated you know which body is needed this can lead to large numbers of duplicates...! |
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comdat support |
turns out to be not helpful doesnt work for templated methods.. |
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template concept |
a concept is a set of requirements a template parameter must comply with |
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generic programming |
polyporphism based in templates |
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value_type and traits class |
a typedef defined within a class a traits class is a adapter class that allows one to use value_type on a wider range of classes and native types through template specialization |