unreachable_switch_default
This default clause is covered by the previous cases.
Description
#The analyzer produces this diagnostic when a default
clause in a switch
statement doesn't match anything because all of the matchable values are matched by an earlier case
clause.
Example
#The following code produces this diagnostic because the values E.e1
and E.e2
were matched in the preceding cases:
dart
enum E { e1, e2 }
void f(E x) {
switch (x) {
case E.e1:
print('one');
case E.e2:
print('two');
default:
print('other');
}
}
Common fixes
#Remove the unnecessary default
clause:
dart
enum E { e1, e2 }
void f(E x) {
switch (x) {
case E.e1:
print('one');
case E.e2:
print('two');
}
}
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.