Method ok_if_can_javelin

battlecode-engine/src/world.rs:1472–1479

(&self, knight_id: UnitID, target_id: UnitID)

    // ************************************************************************

    fn ok_if_can_javelin(&self, knight_id: UnitID, target_id: UnitID) -> Result<(), GameError> {
        let knight = self.my_unit(knight_id)?;
        let target = self.unit(target_id)?;
        knight.ok_if_on_map()?;
        knight.ok_if_javelin_unlocked()?;
        knight.ok_if_within_ability_range(target.location())?;
        Ok(())
    }

    /// Whether the knight can javelin the given robot, without taking into
    /// account the knight's ability heat. Takes into account only the knight's