Struct VariableContext 

pub struct VariableContext {
    pub next_index: VariableId,
}

Context for creating variables in a query. The context keeps track of the next index to assign to a variable. This allows for the creation of new anonymous variables in higher-level query languages.

Fields

next_index: VariableId

The index that will be assigned to the next variable.

Implementations

impl VariableContext

pub fn new() -> Self

Create a new variable context. The context starts with an index of 0.

pub fn next_variable<T: ValueSchema>(&mut self) -> Variable<T>

Create a new variable. The variable is assigned the next available index.

Panics if the number of variables exceeds 128.

This method is usually not called directly, but rather through typed query language macros like find!.

Trait Implementations

impl Debug for VariableContext

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

Formats the value using the given formatter.

impl Default for VariableContext

fn default() -> Self

Returns the “default value” for a type.