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avoid-non-ascii-symbols

added in: 1.6.0
warning
⚙️
Pro+

Warns when a string literal contains non ascii characters.

Ascii characters in string literals might indicate that the string was not localized.

⚙️ Config​

Set ignored-invocations (default is [print, debugPrint]) to ignore strings in specific invocations (example).

analysis_options.yaml
dart_code_metrics:
  rules:
    - avoid-non-ascii-symbols:
        ignored-invocations:
          - print
          - debugPrint

Example​

❌ Bad:

final chinese = 'hello 汉字'; // LINT: Avoid using non ascii symbols in string literals.
final russian = 'hello привет'; // LINT: Avoid using non ascii symbols in string literals.
final withSomeNonAsciiSymbols = '#!$_&-  éè  ;∞¥₤€'; // LINT: Avoid using non ascii symbols in string literals.
final misspelling = 'inform@tiv€'; // LINT: Avoid using non ascii symbols in string literals.

✅ Good:

final english = 'hello';
final someGenericSymbols ='!@#$%^';

Example with "ignored-invocations"​

Config
analysis_options.yaml
dart_code_metrics:
  rules:
    - avoid-non-ascii-symbols:
        ignored-invocations:
          - print

✅ Good:

print('hello 汉字'); // Correct, 'print' is ignored