EN_raw_non_bool_negation_expression
-
Toolschevron_right -
Diagnosticschevron_right -
non_bool_negation_expression non_bool_negation_expression
Details about the 'non_bool_negation_expression' diagnostic produced by the Dart analyzer.
more_vert
-
copyCopy link -
bug_reportReport issue
A negation operand must have a static type of 'bool'.
Description
#
The analyzer produces this diagnostic when the operand of the unary
negation operator (`!`) doesn't have the type `bool`.
Example
#
The following code produces this diagnostic because `x` is an `int` when it
must be a `bool`:
dart
int x = 0;
bool y = !x;
content_copy
Common fixes
#
Replace the operand with an expression that has the type bool:
dart
int x = 0;
bool y = !(x > 0);
content_copy
Was this page's content helpful?
thumb_up
thumb_down
Unless stated otherwise, the documentation on this site reflects Dart 3.13.3. Report an issue.