E009: method-can-be-static

Metadata

• Code: E009
• Rule: method-can-be-static
• Status: Stable since v0.0.1
• Quick fix: not available

What it does

Checks for instance methods where self is unnecessary.

Why is this bad?

If self is never used, the method can be static which makes the API clearer.

Example

struct Foo {}

fun Foo.bar(self, a: int): int {
E009: method can be static
    return a + 1;
}

Use instead:

struct Foo {}

fun Foo.bar(a: int): int {
    return a + 1;
}