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Explain objects and tuples more extensively

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twetzel59 2017-12-27 20:59:45 -05:00
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Nim-for-C-programmers.md
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@ -108,7 +108,7 @@ It is possible to implement object-orientation features from other languages (li
### Structs - Tuples and Objects
Tuples and Objects in Nim are kind of like structs in C, but not really.
Tuples and Objects in Nim are kind of like structs in C, but not really. Objects, like C structs, use nominal typing. This means that given objects A and B (where B is not a subclass of A), A can not be substituted for B, and B can not be substituted for A, even if they have the same fields. Tuples, on the other hand, use structural typing. If a tuple C contains the same fields as tuple D, they are interchangeable. This is a feature not present in C.
### Interfacing C and Nim