Enum ExtensionKind 

pub enum ExtensionKind {
    RateLimit,
    Pgvector,
}

An opt-in framework/database capability a schema announces via a top-level extension <name> { } block (cratestack#153). Declaring an extension only unlocks schema-visible syntax for that capability (e.g. @no_rate_limit, the Vector(n) scalar type) — it never gates codegen or runtime behavior by itself; that’s a separate, same-named Cargo feature per consuming crate (cratestack#161, out of scope here).

This is a closed list by design, not an arbitrary-extension mechanism — see docs/design/extensions.md §7.

Variants

RateLimit

Pgvector

Implementations

impl ExtensionKind

pub const ALL: [ExtensionKind; 2]

Every recognized extension name, in a stable order — used to build clear “expected one of: …” error messages.

pub const fn as_str(&self) -> &'static str

pub fn parse_name(name: &str) -> Option<ExtensionKind>

Parses the bare name written after extension in .cstack source (e.g. rate_limit in extension rate_limit { }). None for any name outside the closed, framework-maintained list.

Trait Implementations

impl Clone for ExtensionKind

fn clone(&self) -> ExtensionKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ExtensionKind

impl Debug for ExtensionKind

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ExtensionKind

fn deserialize<__D>( __deserializer: __D, ) -> Result<ExtensionKind, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ExtensionKind

impl Hash for ExtensionKind

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for ExtensionKind

fn cmp(&self, other: &ExtensionKind) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ExtensionKind

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for ExtensionKind

fn partial_cmp(&self, other: &ExtensionKind) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for ExtensionKind

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ExtensionKind