Struct rustdb::exec::EvalEnv

pub struct EvalEnv<'r> {
    pub stack: Vec<Value>,
    pub bp: usize,
    pub db: DB,
    pub qy: &'r mut dyn Query,
    pub call_depth: usize,
}

Evaluation environment - stack of Values, references to DB and Query.

Fields

stack: Vec<Value>

bp: usize

db: DB

qy: &'r mut dyn Query

call_depth: usize

Implementations

impl<'r> EvalEnv<'r>

pub fn new(db: DB, qy: &'r mut dyn Query) -> Self

Construct a new EvalEnv.

pub fn alloc_locals(&mut self, dt: &[DataType], param_count: usize)

Allocate and initialise local variables.

pub fn go(&mut self, ilist: &[Instruction])

Execute list of instructions.

pub fn call(&mut self, r: &Function)

Call a function.