Comments on: Newspeak Constructors http://digital-sushi.org/entry/newspeak-constructors/ Thoughts on language design, API design, compilers, Smalltalk, and Java technology Sat, 13 Mar 2010 07:45:33 +0000 http://wordpress.org/?v=2.6.5 By: Christian Plesner Hansen http://digital-sushi.org/entry/newspeak-constructors/#comment-995 Christian Plesner Hansen Wed, 02 Jan 2008 15:51:03 +0000 http://digital-sushi.org/entry/newspeak-constructors/#comment-995 What happens if an initializer does a non-local return or throws an exception? Can they access the instance being initialized through 'self'? In Gilad's post he writes about subclasses that they must call the primary constructor of the superclass because "It helps ensure that an object is always completely initialized". That's why I assumed that you were not allowed to execute general expression in slot initializers, because otherwise you undermine the guarantees that objects are properly initialized. And then you might as well allow subclasses to call secondary constructors. What happens if an initializer does a non-local return or throws an exception? Can they access the instance being initialized through ’self’?

In Gilad’s post he writes about subclasses that they must call the primary constructor of the superclass because “It helps ensure that an object is always completely initialized”. That’s why I assumed that you were not allowed to execute general expression in slot initializers, because otherwise you undermine the guarantees that objects are properly initialized. And then you might as well allow subclasses to call secondary constructors.

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