Enum DeriveMode 

pub enum DeriveMode {
    FeatureGated,
    Always,
    Custom(String),
}

Controls how derive macros for ASN.1 types are emitted in generated code.

The generated code uses synta_derive proc-macros (Asn1Sequence, Asn1Choice, Asn1Set) as well as helper attributes (asn1(tag(…)), asn1(optional), asn1(rawder)). By default these are wrapped in #[cfg_attr(feature = "derive", …)] so that the consuming crate can make synta-derive an optional dependency. Third-party crates that always depend on synta-derive can use DeriveMode::Always to emit the attributes unconditionally, removing the need to declare a derive Cargo feature.

Variants

FeatureGated

Emit #[cfg_attr(feature = "derive", derive(Asn1Sequence))] (default).

Derive macros and their helper attributes are gated behind a derive Cargo feature. The consuming crate must declare [features] derive = ["dep:synta-derive"] (or similar) in its Cargo.toml.

Always

Emit #[derive(Asn1Sequence)] unconditionally — no feature gate.

Use this when the consuming crate always depends on synta-derive and does not want to expose a derive Cargo feature.

Custom(String)

Emit #[cfg_attr(feature = "<name>", derive(Asn1Sequence))] with a custom feature name instead of "derive".

Useful when the consuming crate exposes its own feature name for derive support (e.g. "asn1-derive" or "full").

Trait Implementations

impl Clone for DeriveMode

fn clone(&self) -> DeriveMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DeriveMode

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

Formats the value using the given formatter.

impl Default for DeriveMode

fn default() -> DeriveMode

Returns the “default value” for a type.

impl PartialEq for DeriveMode

fn eq(&self, other: &DeriveMode) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for DeriveMode

impl StructuralPartialEq for DeriveMode