Trait UnspawnedMobEdits 

pub trait UnspawnedMobEdits {
    // Required methods
    fn set_equipment(
        &self,
        mob: UnspawnedMobRef,
        slot: EquipmentSlot,
        item: Option<ItemStack>,
    ) -> Result<(), UnspawnedMobError>;
    fn set_attribute_base(
        &self,
        mob: UnspawnedMobRef,
        attribute: &Identifier,
        base: f64,
    ) -> Result<(), UnspawnedMobError>;
    fn add_attribute_modifier(
        &self,
        mob: UnspawnedMobRef,
        attribute: &Identifier,
        modifier: AttributeModifier,
    ) -> Result<(), UnspawnedMobError>;
    fn remove_attribute_modifier(
        &self,
        mob: UnspawnedMobRef,
        attribute: &Identifier,
        id: &Identifier,
    ) -> Result<bool, UnspawnedMobError>;
    fn add_tag(
        &self,
        mob: UnspawnedMobRef,
        tag: &str,
    ) -> Result<bool, UnspawnedMobError>;
    fn remove_tag(
        &self,
        mob: UnspawnedMobRef,
        tag: &str,
    ) -> Result<bool, UnspawnedMobError>;
    fn set_custom_name(
        &self,
        mob: UnspawnedMobRef,
        name: Option<Text>,
    ) -> Result<(), UnspawnedMobError>;
}

The edits a hook may make to the mob it was lent, beside the handle’s reads.

The game hands this out with the UnspawnedMobRef for one hook call and keeps neither after it returns. Each method takes that handle and reaches only that mob: another lend’s handle, or one kept from an earlier call, is refused with UnspawnedMobError::Expired. An edit applies at once, so the handle’s reads, and the next listener, see it. The editor works where the hook’s host is the read-only one: it changes nothing in the level, only the mob that is about to join it.

Required Methods

fn set_equipment( &self, mob: UnspawnedMobRef, slot: EquipmentSlot, item: Option<ItemStack>, ) -> Result<(), UnspawnedMobError>

Puts item in slot (Mob.setItemSlot): an API-owned stack; None empties the slot. Invalid item keys, counts, damage or components are refused with Invalid, without changing the slot. The stack’s attribute modifiers apply to the mob at once.

fn set_attribute_base( &self, mob: UnspawnedMobRef, attribute: &Identifier, base: f64, ) -> Result<(), UnspawnedMobError>

Sets an attribute’s base value (AttributeInstance.setBaseValue), kept within the attribute’s range.

fn add_attribute_modifier( &self, mob: UnspawnedMobRef, attribute: &Identifier, modifier: AttributeModifier, ) -> Result<(), UnspawnedMobError>

Adds a permanent modifier (AttributeInstance.addPermanentModifier), saved with the mob.

fn remove_attribute_modifier( &self, mob: UnspawnedMobRef, attribute: &Identifier, id: &Identifier, ) -> Result<bool, UnspawnedMobError>

Removes the modifier id from the attribute; false when it had none.

fn add_tag( &self, mob: UnspawnedMobRef, tag: &str, ) -> Result<bool, UnspawnedMobError>

Adds a tag (Entity.addTag); false when the mob has it already.

fn remove_tag( &self, mob: UnspawnedMobRef, tag: &str, ) -> Result<bool, UnspawnedMobError>

Removes a tag (Entity.removeTag); false when the mob did not have it.

fn set_custom_name( &self, mob: UnspawnedMobRef, name: Option<Text>, ) -> Result<(), UnspawnedMobError>

Names the mob (Entity.setCustomName), or takes its name away with None. A component deeper than 512 nodes is refused with UnspawnedMobError::Text before changing the mob’s name.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors