![]() How- ever, generic types built on other types and relying on concepts|to both ensure type conformance and drive code specialization|restrain the in- terface and the implementation of the newly created type: specic meth- ods and associated types not mentioned in the concept will not be part of the new type. ![]() Most modern languages support this notion of signature on generic types. The upcoming C++0x standard will promote concepts from abstract en- tities (not directly enforced by the tools) to language constructs, enabling compilers and tools to perform additional checks on generic constructs as well as enabling new features (e.g., concept-based overloading). Concepts dene the requirements over a type (or a parameter) by ex- pressing constraints on its methods and dependent types (typedefs). ![]() Classical (unbounded) genericity in C++03 denes the inter- actions between generic data types and algorithms in terms of concepts.
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