Struct Context 

pub struct Context<'a> {
    pub expression: &'a str,
    pub runtime: &'a Runtime,
    pub offset: usize,
    /* private fields */
}

Context object used during expression evaluation.

The Context struct carries state needed by the interpreter and functions, including the expression string (for error messages), runtime (for function lookup), current AST offset, and expref side-channel table.

Fields

expression: &'a str

Expression string being interpreted.

runtime: &'a Runtime

JMESPath runtime used for function lookup.

offset: usize

Current AST offset (for error reporting).

Implementations

impl<'a> Context<'a>

pub fn new(expression: &'a str, runtime: &'a Runtime) -> Context<'a>

Creates a new context.

pub fn get_expref(&self, id: usize) -> Option<&Ast>

Retrieves an expref AST by index.

pub fn push_scope(&mut self, bindings: HashMap<String, Value>)

Push a new scope onto the scope stack.

pub fn pop_scope(&mut self)

Pop the innermost scope from the scope stack.

pub fn get_variable(&self, name: &str) -> Option<Value>

Look up a variable in the scope stack.