I am going through the language tour and, coming from a mostly Javascript background, I’m having trouble understanding how to destructure this record.

(int, String, {String b, String c}) rec = (7, c:"testc", "positionaltest", b:"testb");
String (:b) = rec; 
print(b); // Expecting "testb"

Apparently dart is trying to assign the entire record rather than destructuring, because if I try to grab a positional value instead, it doesn’t throw an error, but it instead assigns the entire record to the variable.

(int, String, {String b, String c}) rec = (7, c:"testc", "positionaltest", b:"testb");
String (a) = rec; 
print(a); // Expecting 7

So far I’ve only gotten to the Records page, and this is my first encounter with destructuring in Dart.

Why are my examples not working as I expect, and what is the correct way to do them?

Using Dart 3.4.4