Declare const String from const String

Question

const String IP_ADDRESS = "http://192.168.1.103:8088/";
const String HOME_EXPECTED = IP_ADDRESS + "index.html";

This code returns unexpected error message from Dart Editor. An expression of type 'num' was expected Why? and how can I fix it?

I tried using 'final', 'final const', and static. but failed :(

Answer 1

Update

http://dartbug.com/15853 says

So String+ String is a constant (and has been for a while). String* int isn't and is not expected to be.

I created http://dartbug.com/22408

Original

In Dart it is very limited how you can construct consts. The + operator on String isn't whitelisted for const creation.

Try this instead:

const String HOME_EXPECTED = "${IP_ADDRESS}index.html";

or

final String HOME_EXPECTED = IP_ADDRESS + "index.html";

if const is not required.