NGWS SDK Documentation  

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6.4.2 Evaluation of user-defined conversions

A user-defined conversion converts a value from its type, called the source type, to another type, called the target type. Evaluation of a user-defined conversion centers on finding the most specific user-defined conversion operator for the particular source and target types. This determination is broken into several steps:

Once a most specific user-defined conversion operator has been identified, the actual execution of the user-defined conversion involves up to three steps:

Evaluation of a user-defined conversion never involves more than one user-defined conversion operator. In other words, a conversion from type S to type T will never first execute a user-defined conversion from S to X and then execute a user-defined conversion from X to T.

Exact definitions of evaluation of user-defined implicit or explicit conversions are given in the following sections. The definitions make use of the following terms: