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digitalmars.D - template FieldTypeTuple(S) in std.traits

1. Are the types guaranteed to be in the same order as the definition?

struct S1 {int a; float f} can be intialized with S1(10, 10.5), implying a
constructor that is based on the lexical order in the definition? 

Will FieldTypeTuple!(S1), always give me Tuple!(int, float)? 

Would the answer be the same if S1 were a class?

2. The description of "Template RepresentationTypeTuple(T...)" states:

    Get the primitive types of the fields of a struct or class, in topological

Is this the lexical order in the code or how they are laid out when compiled or

Aug 31 2009