avoid_returning_null

Group: style

Maturity: stable

Linter v0.1.31

Since info is static, may be stale

View all Lint Rules

Using the Linter

AVOID returning null from members whose return type is bool, double, int, or num.

Functions that return primitive types such as bool, double, int, and num are generally expected to return non-nullable values. Thus, returning null where a primitive type was expected can lead to runtime exceptions.

BAD:

bool getBool() => null;
num getNum() => null;
int getInt() => null;
double getDouble() => null;

GOOD:

bool getBool() => false;
num getNum() => -1;
int getInt() => -1;
double getDouble() => -1.0;