# E0264

A method call that two or more of the receiver's traits (or a parameter's bounds) provide, when the type's own `impl` does not. Spans the method name. Call it qualified instead: `Display.to_string(x)`.

**Machine-applicable fix:** none.

## Example

This program fails with `E0264`.

```oska
trait Short {
    fn describe(self) -> String
}

trait Long {
    fn describe(self) -> String
}

struct Cat { name: String }

impl Short for Cat {
    fn describe(self) -> String {
        "cat"
    }
}

impl Long for Cat {
    fn describe(self) -> String {
        "a cat"
    }
}

fn show(c: Cat) -> String {
    c.describe()
}
```

## Fixed

The same program, fixed.

```oska
trait Short {
    fn describe(self) -> String
}

trait Long {
    fn describe(self) -> String
}

struct Cat { name: String }

impl Short for Cat {
    fn describe(self) -> String {
        "cat"
    }
}

impl Long for Cat {
    fn describe(self) -> String {
        "a cat"
    }
}

fn show(c: Cat) -> String {
    Short.describe(c)
}
```

Listed in the [checker notes](/checker.md#e0264). `oskac explain E0264` prints this entry offline.