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In computer programming, an enumerated type (also called enumeration, enum, or factor in the R programming language, and a categorical variable in statistics) is a data type consisting of a set of named values called elements, members, enumeral, or enumerators of the type.
In computer science, a tagged union, also called a variant, variant record, choice type, discriminated union, disjoint union, sum type, or coproduct, is a data structure used to hold a value that could take on several different, but fixed, types.
C++ has enumeration types that are directly inherited from C's and work mostly like these, except that an enumeration is a real type in C++, giving added compile-time checking. Also (as with structs), the C++ enum keyword is combined with a typedef , so that instead of naming the type enum name , simply name it name .
Although on GCC and LLVM this particular program compiles and runs as expected, more complicated examples may interact with assumptions made by strict aliasing and lead to unwanted behavior. The option -fno-strict-aliasing will ensure correct behavior of code using this form of type-punning, although using other forms of type punning is ...
3.1 Example serialization and deserialization code in Python. 4 ... long, float, double, bytes, and string) and complex types (record, enum, array, map, union, and ...
The binding is generated using Python scripts and templates, that can be easily adapted to fit custom needs. It leverages modern C++11 features like scoped enums, lambdas, and variadic templates, instead of relying on macros (all OpenGL symbols are real functions and variables). It provides type-safe parameters, per feature API header, lazy ...
For example, a fund with a 0.08% expense ratio would charge you $8 per year for every $10,000 you invest. Some money market funds may also carry other fees, such as transaction fees or load fees ...
C++ is also more strict in conversions to enums: ints cannot be implicitly converted to enums as in C. Also, enumeration constants (enum enumerators) are always of type int in C, whereas they are distinct types in C++ and may have a size different from that of int. [needs update] In C++ a const variable must be initialized; in C this is not ...