Trait DynExpr 

pub trait DynExpr:
    Debug
    + Send
    + Sync {
    // Required method
    fn render_dyn(&self, buf: &mut String);

    // Provided method
    fn render_dyn_params(
        &self,
        buf: &mut String,
        _params: &mut BTreeMap<String, Value>,
    ) { ... }
}

A type-erased expression that can render itself into a SurrealQL buffer. Implemented by every expression node; the common currency of the builder.

Required Methods

fn render_dyn(&self, buf: &mut String)

Append this expression’s SurrealQL to buf with all values inlined.

Provided Methods

fn render_dyn_params( &self, buf: &mut String, _params: &mut BTreeMap<String, Value>, )

Render with $param placeholders, collecting values into params. Default falls back to inline rendering; Literal nodes override this to emit $pN placeholders and collect their value.

Trait Implementations

impl DynExpr for Box<dyn DynExpr>

fn render_dyn(&self, buf: &mut String)

Append this expression’s SurrealQL to buf with all values inlined.

fn render_dyn_params( &self, buf: &mut String, params: &mut BTreeMap<String, Value>, )

Render with $param placeholders, collecting values into params. Default falls back to inline rendering; Literal nodes override this to emit $pN placeholders and collect their value.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl DynExpr for Box<dyn DynExpr>

fn render_dyn(&self, buf: &mut String)

fn render_dyn_params( &self, buf: &mut String, params: &mut BTreeMap<String, Value>, )

Implementors

impl DynExpr for AndExpr

impl DynExpr for Closure

impl DynExpr for ContainsExpr

impl DynExpr for EqExpr

impl DynExpr for Func

impl DynExpr for Grouped

impl DynExpr for GtExpr

impl DynExpr for GteExpr

impl DynExpr for Ident

impl DynExpr for IfExpr

impl DynExpr for InExpr

impl DynExpr for KnnExpr

impl DynExpr for LtExpr

impl DynExpr for LteExpr

impl DynExpr for MatchesExpr

impl DynExpr for NeExpr

impl DynExpr for NoneLit

impl DynExpr for NotExpr

impl DynExpr for NotInExpr

impl DynExpr for OrExpr

impl DynExpr for Path

impl DynExpr for Raw

impl DynExpr for RecordLink

impl<T: SurrealRecord, V: SurrealQL> DynExpr for Column<T, V>

impl<T: SurrealRecord> DynExpr for ColumnSet<T>

impl<T: SurrealRecord> DynExpr for Select<T>

A Select is usable as an expression — rendered parenthesized — so it can be embedded as a subquery: a scalar/IN operand in a WHERE, a projection, or a SET/FROM value. Params from the subquery merge into the parent’s map.

impl<V: SurrealQL> DynExpr for Literal<V>

impl<V: SurrealQL> DynExpr for Param<V>