Method ok_if_can_build

battlecode-engine/src/world.rs:1329–1344

(&self, worker_id: UnitID, blueprint_id: UnitID)

    }

    fn ok_if_can_build(&self, worker_id: UnitID, blueprint_id: UnitID)
                       -> Result<(), GameError> {
        let worker = self.my_unit(worker_id)?;
        let blueprint = self.my_unit(blueprint_id)?;
        // The worker must be on the map.
        worker.ok_if_on_map()?;
        // The worker must be able to act.
        worker.ok_if_can_worker_act()?;
        // The worker must be adjacent to the blueprint.
        worker.ok_if_within_ability_range(blueprint.location())?;
        // The blueprint must be incomplete.
        if blueprint.structure_is_built()? {
            Err(GameError::StructureAlreadyBuilt)?;
        }
        Ok(())
    }

    /// Whether the worker can build a blueprint with the given ID. The worker
    /// and the blueprint must be adjacent to each other. The worker cannot