David-Sarah Hopwood wrote: [...] > What is proposed to be hoisted in the case of 'const' and 'let' is just > the point at which the variable's *scope* begins. But, unlike the case > of function definitions, this in general extends the scope to a point > where the variable has not been initialized. If 'const' and 'let' (with > an initializer) were not hoisted, then there could be a static guarantee > that the variable will have been initialized at every point at which it > is in scope. By hoisting the scope, we're effectively throwing away the > possibility of such a guarantee -- at least if we want to avoid a much > more complicated static analysis.
This would also mean that we cannot have any types that do not include the value 'undefined' (either primitive types, or "non-nullable" reference types). -- David-Sarah Hopwood _______________________________________________ Es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
