Struct gapi_grpc::google::api::expr::v1alpha1::Expr

pub struct Expr {
    pub id: i64,
    pub expr_kind: Option<ExprKind>,
}

An abstract representation of a common expression.

Expressions are abstractly represented as a collection of identifiers, select statements, function calls, literals, and comprehensions. All operators with the exception of the ‘.’ operator are modelled as function calls. This makes it easy to represent new operators into the existing AST.

All references within expressions must resolve to a [Decl][google.api.expr.v1alpha1.Decl] provided at type-check for an expression to be valid. A reference may either be a bare identifier name or a qualified identifier google.api.name. References may either refer to a value or a function declaration.

For example, the expression google.api.name.startsWith('expr') references the declaration google.api.name within a [Expr.Select][google.api.expr.v1alpha1.Expr.Select] expression, and the function declaration startsWith.

Fields

id: i64

Required. An id assigned to this node by the parser which is unique in a given expression tree. This is used to associate type information and other attributes to a node in the parse tree.

expr_kind: Option<ExprKind>

Required. Variants of expressions.

Trait Implementations

impl Clone for Expr

fn clone(&self) -> Expr

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Expr

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

Formats the value using the given formatter.

impl Default for Expr

fn default() -> Expr

Returns the “default value” for a type.

impl Message for Expr

fn encode_raw<B>(&self, buf: &mut B) where
    B: BufMut, 

fn merge_field<B>(
    &mut self,
    tag: u32,
    wire_type: WireType,
    buf: &mut B,
    ctx: DecodeContext
) -> Result<(), DecodeError> where
    B: Buf, 

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.

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

Encodes the message to a buffer.

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

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

pub fn decode<B>(buf: B) -> Result<Self, DecodeError> where
    Self: Default,
    B: Buf, 

Decodes an instance of the message from a buffer.

pub fn decode_length_delimited<B>(buf: B) -> Result<Self, DecodeError> where
    Self: Default,
    B: Buf, 

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

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

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

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

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

impl PartialEq<Expr> for Expr

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl StructuralPartialEq for Expr