Recently Ruby has added pattern matching:
require "json"
json = <<END
{
"name": "Alice",
"age": 30,
"children": [{ "name": "Bob", "age": 2 }]
}
END
case JSON.parse(json, symbolize_names: true)
in {name: "Alice", children: [{name: "Bob", age: age}]}
p age #=> 2
end
It can deconstruct the inside of a “structure”.
Will Crystal consider support for pattern matching in the future?