Enum Arg 

pub enum Arg {
    Boolean,
    Double,
    Integer,
    String,
    Entity,
    GameProfile,
    BlockPos,
    ColumnPos,
    Vec3,
    Vec2,
    BlockState,
    ItemStack,
    Message,
    Component,
    ResourceLocation,
    Uuid,
    Rotation,
    Options(Vec<String>),
    Player,
}

Argument type for a command parameter.

Determines how the argument is parsed, validated, and presented in client-side tab-completion (Brigadier tree).

Variants

Boolean

Boolean (true/false). Parser ID 0.

Double

64-bit floating point number. Parser ID 2.

Integer

64-bit integer. Parser ID 3.

String

Free-form single-word string. Parser ID 5, mode SINGLE_WORD.

Entity

Entity selector (@a, @p, @r, @e, @s) or player name. Parser ID 6.

GameProfile

Game profile (player name with tab-completion). Parser ID 7.

BlockPos

Block position (integer coordinates, supports ~). Parser ID 42.

ColumnPos

Column position (x z integers). Parser ID 43.

Vec3

3D coordinates (supports ~ and ^). Parser ID 40.

Vec2

2D coordinates (x z, supports ~ and ^). Parser ID 41.

BlockState

Block state (e.g., stone, oak_planks[axis=x]). Parser ID 44.

ItemStack

Item stack (e.g., diamond_sword{Damage:10}). Parser ID 46.

Message

Chat message (like GreedyString but with @mention support). Parser ID 48.

Component

JSON text component. Parser ID 10.

ResourceLocation

Resource location (namespace:path). Parser ID 35.

Uuid

UUID. Parser ID 11.

Rotation

Yaw and pitch rotation. Parser ID 39.

Options(Vec<String>)

Fixed set of choices with tab-completion. Uses string parser with minecraft:ask_server suggestions.

Player

Player name — tab-completes with connected player names. Uses minecraft:game_profile parser (ID 7).

Implementations

impl Arg

pub fn token_count(&self) -> usize

Returns how many tokens this argument type consumes.

Vec3 and BlockPos consume 3 tokens, Vec2/ColumnPos/Rotation consume 2, Message is greedy (0 means “consume all remaining”), everything else is 1.

Trait Implementations

impl Clone for Arg

fn clone(&self) -> Arg

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Arg

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.