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A comment on The Crystal Programming Language. Parent comment

Re:The Crystal Programming Language by IshKebab on Monday April 16, 2018 @06:13PM (#16853333)
That sounds like how you have to access JSON data dynamically in any statically typed language.
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Re:The Crystal Programming Language by actsasbuffoon on Tuesday April 17, 2018 @05:28PM (#16862465)
But these other languages wouldn't necessarily remain type-safe.

The functor approach doesn't involve any type casting, and null pointer exceptions are impossible.

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Re:The Crystal Programming Language by IshKebab on Wednesday April 18, 2018 @06:07AM (#16866070)
So, like this sort of thing:

int JsonValue::getAsInt(int defaultIfError);

Or, in Go:

func (JsonValue*) AsInt() (int64, error)

Or are you just talking about it returning the value as a Rust-style Result sum type?

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