Struct EnumParam 

pub struct EnumParam<E: ParamEnum> {
    pub info: ParamInfo,
    /* private fields */
}

An enum parameter.

Fields

info: ParamInfo

Implementations

impl<E: ParamEnum> EnumParam<E>

pub fn new(info: ParamInfo) -> Self

Panics

Panics if info.default_plain is non-finite, negative, or >= E::variant_count(). The cast f64 as u32 saturates silently - a user-supplied #[param(default = -1)] would land on variant 0 without any signal that the default was invalid. Validate up front so the bug surfaces at plugin construction time.

pub fn value(&self) -> E

pub fn set_value(&self, v: E)

pub fn set_index(&self, idx: u32)

pub fn index(&self) -> u32

pub fn id(&self) -> u32

pub fn format_by_index(value: f64) -> String

Format a plain value (index as f64) to the variant name string.

Associated function - the dispatch is purely on E, no instance state is read. The #[derive(Params)] macro calls it as <EnumParam<E>>::format_by_index(value) so the field type supplies E.