[Bug 25050] Should Constructors behave like operations or (attribute) setters?

https://www.w3.org/Bugs/Public/show_bug.cgi?id=25050

--- Comment #2 from Boris Zbarsky <bzbarsky@mit.edu> ---
Put another way, in pseudocode a WebIDL constructor looks like this:

  function myConstructor() {
    [f, args] = selectOverloadAndCoerceArgs(arguments);
    return f.call(args);
  }

where the behavior of "f" is defined by whatever specification is defining the
constructor (and might set attributes on the object, or do something else; who
knows) and the coercions performed to produce "args" are defined by WebIDL. 
The latter are what throws when an out-of-the-set value is passed for an
enumeration.

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