Struct Function 

pub struct Function {
    pub identifier: Option<Identifier>,
    pub metadata: Option<Metadata>,
    pub arguments: Option<Pack>,
    pub return_type: Option<Metapattern>,
    pub session_dependent: bool,
    pub non_deterministic: bool,
    pub kind: Option<Kind>,
}

Definition information for an extension.

Fields

identifier: Option<Identifier>

Identifier for the extension.

metadata: Option<Metadata>

Common metadata for the extension.

arguments: Option<Pack>

List of arguments expected by the function.

The structure is shared with user-defined compound type classes because it is very similar. Note however that not all pattern and binding types are currently applicable:

• required enumeration arguments must be represented using a metaenum pattern representing a defined set of values, are not skippable, and use “generic” binding type;
• optional enumeration arguments are represented the same way, but with skippable set to true;
• type arguments are represented using a typename pattern, are not skippable, and use “generic” binding type;
• constant value arguments are represented using a typename pattern, are not skippable, and use “literal” binding type;
• non-constant value arguments are represented using a typename pattern, are not skippable, and use “value” binding type.

This may be further generalized in the future.

return_type: Option<Metapattern>

The return type of the function, evaluated after the pack is matched.

session_dependent: bool

If set, the behavior of the function is session-dependent.

non_deterministic: bool

If set, the behavior of the function is non-deterministic, i.e. evaluating it twice may yield different values. Note that it is possible for a function to be session-dependent without being non-deterministic, if the function does always return the same value within a session.

kind: Option<Kind>

The function type, along with type-specific properties.

Trait Implementations

impl Clone for Function

fn clone(&self) -> Function

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Function

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

Formats the value using the given formatter.

impl Default for Function

fn default() -> Self

Returns the “default value” for a type.

impl InputNode for Function

fn type_to_node() -> Node

Creates an empty output node for a protobuf datum of this type.

fn data_to_node(&self) -> Node

Creates an empty output node for a protobuf datum with this value.

fn oneof_variant(&self) -> Option<&'static str>

Returns the name of the selected variant of a oneof field, if this is a rust enum used to represent a oneof field.

fn parse_unknown(&self, y: &mut Context<'_>) -> bool

Complete the subtrees of this datum in output that have not already been parsed using UnknownField nodes. Returns whether any such nodes were added.

impl Message for Function

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for Function

fn eq(&self, other: &Function) -> 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 ProtoMessage for Function

fn proto_message_type() -> &'static str

Returns the protobuf type name for messages of this type.

impl StructuralPartialEq for Function