eval

Documentation

Index

• Constants
• Variables
• func DefineMacros(program *ast.Program, env object.Environment)
• func Eval(node ast.Node, env object.Environment) object.Object
• func ExpandMacros(program ast.Node, env object.Environment) ast.Node

Constants

const (
	// FuncNameQuote is a name for quote function.
	FuncNameQuote = "quote"
	// FuncNameUnquote is a name for unquote function.
	FuncNameUnquote = "unquote"
)

Variables

var (
	// NilValue represents a value of nil reference.
	NilValue = &object.Nil{}
	// TrueValue represents a value of true literals.
	TrueValue = &object.Boolean{Value: true}
	// FalseValue represents a value of false literals.
	FalseValue = &object.Boolean{Value: false}
)

Functions

func DefineMacros

func DefineMacros(program *ast.Program, env object.Environment)

DefineMacros finds macro definitions in the program, saves them to a given environment and removes them from the AST.

func Eval

func Eval(node ast.Node, env object.Environment) object.Object

Eval evaluates the given node and returns an evaluated object.

func ExpandMacros

func ExpandMacros(program ast.Node, env object.Environment) ast.Node

ExpandMacros expands defined macros and replaces AST nodes with the result of macro expansion.