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prefer_early_return

A rule which highlights if statements that span the entire body of a function or loop, and suggests replacing them with a reversed boolean check with an early return or continue.

Example config:​

solid_lints:
  diagnostics:
    prefer_early_return:
      maximum_statements: 1
      ignore_if_case: true

Example​

BAD:​

void func() {
  if (a) { //LINT
    c;
    d;
  }
}

void loop() {
  for (final item in items) {
    if (item.isValid) { //LINT
      process(item);
      save(item);
    }
  }
}

GOOD:​

void func() {
  if (!a) return;
  c;
  d;
}

void loop() {
  for (final item in items) {
    if (!item.isValid) continue;
    process(item);
    save(item);
  }
}

Parameters​

maximum_statements (int)​

The maximum number of statements allowed inside an if block before triggering the lint. If the number of statements does not exceed this threshold, the analysis is skipped.

ignore_if_case (bool)​

Whether to ignore if-case pattern matching statements.