sdk_version_bool_operator_in_const_context

The use of the operator '{0}' for 'bool' operands in a constant context wasn't supported until version 2.3.2, but this code is required to be able to run on earlier versions.

The analyzer produces this diagnostic when any use of the &, |, or ^ operators on the class bool inside a constant context is found in code that has an SDK constraint whose lower bound is less than 2.3.2. Using these operators in a constant context wasn't supported in earlier versions, so this code won't be able to run against earlier versions of the SDK.

Here's an example of a pubspec that defines an SDK constraint with a lower bound of less than 2.3.2:

environment:
  sdk: '>=2.1.0 <2.4.0'

In the package that has that pubspec, code like the following produces this diagnostic:

const bool a = true;
const bool b = false;
const bool c = a & b;

If you don't need to support older versions of the SDK, then you can increase the SDK constraint to allow the operators to be used:

environment:
 sdk: '>=2.3.2 <2.4.0'

If you need to support older versions of the SDK, then either rewrite the code to not use these operators, or change the code so that the expression isn't in a constant context:

const bool a = true;
const bool b = false;
bool c = a & b;

Unless stated otherwise, the documentation on this site reflects Dart 3.8.0. Page last updated on 2025-05-08. View source or report an issue.