eval

Documentation

Index

• Variables
• func EvaluateComp(left, right object.Object, op string, con lexer.Context) object.Object
• func EvaluateSides(left, right object.Object, op string, con lexer.Context) object.Object
• type Evaluator
  • func New() *Evaluator
  • func (e *Evaluator) Evaluate(node ast.Node, env *object.Environment) object.Object

Variables

var (
	// NULL - the single null object
	NULL = &object.Null{}
	// TRUE - An invariant
	TRUE = &object.Boolean{Value: true}
	// FALSE - An invariant
	FALSE = &object.Boolean{Value: false}
)

Functions

func EvaluateComp

func EvaluateComp(
	left, right object.Object,
	op string,
	con lexer.Context,
) object.Object

EvaluateComp compares two values to see if they are equal

func EvaluateSides

func EvaluateSides(left, right object.Object, op string, con lexer.Context) object.Object

EvaluateSides performs an arithmetic operation on two objects

Types

type Evaluator

type Evaluator struct {
	Ctxt lexer.Context
	// contains filtered or unexported fields
}

Evaluator epresents the program that walks the tree

func New

func New() *Evaluator

New - returns a new evaluator

func (*Evaluator) Evaluate

func (e *Evaluator) Evaluate(node ast.Node, env *object.Environment) object.Object

Evaluate runs the evaluator, walking the tree and executing code