unnecessary_brace_in_string_interps
Unnecessary braces in a string interpolation.
Description
#The analyzer produces this diagnostic when a string interpolation with braces is used to interpolate a simple identifier and isn't followed by alphanumeric text.
Example
#The following code produces this diagnostic because the interpolation element ${s}
uses braces when they are not necessary:
dart
String f(String s) {
return '"${s}"';
}
Common fixes
#Remove the unnecessary braces:
dart
String f(String s) {
return '"$s"';
}
Unless stated otherwise, the documentation on this site reflects Dart 3.7.3. Page last updated on 2025-05-08. View source or report an issue.