Pre-RFC: Break with value in for/while loops

[newpavlov]

I can't remember a single case in my practice where I would've used this feature, so I am very skeptical about it and I don't think it pulls its weight in the proposed form.

As for return value of for loop I strongly prefer potential integration wit generators to the proposed approach:

[Pre-RFC]: Generator integration with for loops

Motivation Although Generator was initially introduced with async story in mind, it can be also used for enhancing core for loop functionality. Integration of Generator with for loops looks quite natural: for value in generator { // .. } Here we iterate over yielded values and discard return value of the generator. Introduction of this feature will also prevent a lot of confusion for people coming from Python, as syntax of for loops and generators are quite close, thus it will be natural …