Trait RelationParsePair 

pub trait RelationParsePair: Sized {
    // Required methods
    fn rule() -> Rule;
    fn message() -> &'static str;
    fn parse_pair_with_context(
        extensions: &SimpleExtensions,
        pair: Pair<'_, Rule>,
        input_children: Vec<Box<Rel>>,
        input_field_count: usize,
    ) -> Result<(Self, usize), MessageParseError>;
    fn into_rel(self, adv_ext: Option<AdvancedExtension>) -> Rel;
}

A trait for parsing relations with full context for tree building.

Required Methods

fn rule() -> Rule

fn message() -> &'static str

fn parse_pair_with_context( extensions: &SimpleExtensions, pair: Pair<'_, Rule>, input_children: Vec<Box<Rel>>, input_field_count: usize, ) -> Result<(Self, usize), MessageParseError>

Parse the grammar pair into this relation type and its output field count.

Returns (Self, usize) where usize is the output field count — computed during parsing when input_field_count is available.

fn into_rel(self, adv_ext: Option<AdvancedExtension>) -> Rel

Consume this parsed relation, apply the advanced extension, and produce the final Rel.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl RelationParsePair for AggregateRel

fn rule() -> Rule

fn message() -> &'static str

fn into_rel(self, adv_ext: Option<AdvancedExtension>) -> Rel

fn parse_pair_with_context( extensions: &SimpleExtensions, pair: Pair<'_, Rule>, input_children: Vec<Box<Rel>>, _input_field_count: usize, ) -> Result<(Self, usize), MessageParseError>

impl RelationParsePair for FetchRel

fn rule() -> Rule

fn message() -> &'static str

fn into_rel(self, adv_ext: Option<AdvancedExtension>) -> Rel

fn parse_pair_with_context( extensions: &SimpleExtensions, pair: Pair<'_, Rule>, input_children: Vec<Box<Rel>>, input_field_count: usize, ) -> Result<(Self, usize), MessageParseError>

impl RelationParsePair for FilterRel

fn rule() -> Rule

fn message() -> &'static str

fn into_rel(self, adv_ext: Option<AdvancedExtension>) -> Rel

fn parse_pair_with_context( extensions: &SimpleExtensions, pair: Pair<'_, Rule>, input_children: Vec<Box<Rel>>, input_field_count: usize, ) -> Result<(Self, usize), MessageParseError>

impl RelationParsePair for JoinRel

fn rule() -> Rule

fn message() -> &'static str

fn into_rel(self, adv_ext: Option<AdvancedExtension>) -> Rel

fn parse_pair_with_context( extensions: &SimpleExtensions, pair: Pair<'_, Rule>, input_children: Vec<Box<Rel>>, input_field_count: usize, ) -> Result<(Self, usize), MessageParseError>

impl RelationParsePair for ProjectRel

fn rule() -> Rule

fn message() -> &'static str

fn into_rel(self, adv_ext: Option<AdvancedExtension>) -> Rel

fn parse_pair_with_context( extensions: &SimpleExtensions, pair: Pair<'_, Rule>, input_children: Vec<Box<Rel>>, input_field_count: usize, ) -> Result<(Self, usize), MessageParseError>

impl RelationParsePair for ReadRel

fn rule() -> Rule

fn message() -> &'static str

fn parse_pair_with_context( extensions: &SimpleExtensions, pair: Pair<'_, Rule>, input_children: Vec<Box<Rel>>, input_field_count: usize, ) -> Result<(Self, usize), MessageParseError>

fn into_rel(self, adv_ext: Option<AdvancedExtension>) -> Rel

impl RelationParsePair for SortRel

fn rule() -> Rule

fn message() -> &'static str

fn into_rel(self, adv_ext: Option<AdvancedExtension>) -> Rel

fn parse_pair_with_context( extensions: &SimpleExtensions, pair: Pair<'_, Rule>, input_children: Vec<Box<Rel>>, input_field_count: usize, ) -> Result<(Self, usize), MessageParseError>

Implementors

impl RelationParsePair for VirtualReadRel