code

Documentation

Index

• func MakeInstruction(op Opcode, operands ...int) []byte
• func ReadOperands(operation *Operation, instructionBytes []byte) ([]int, int)
• type Instructions
  • func (instructions Instructions) String() string
• type Opcode
• type Operation
  • func LookupOperation(opcode byte) (*Operation, error)

Functions

func MakeInstruction

func MakeInstruction(op Opcode, operands ...int) []byte

func ReadOperands

func ReadOperands(operation *Operation, instructionBytes []byte) ([]int, int)

Types

type Instructions

type Instructions []byte

func (Instructions) String

func (instructions Instructions) String() string

type Opcode

type Opcode byte

const (
	OpConstant Opcode = iota

	OpAdd
	OpSub
	OpMul
	OpDiv

	OpTrue
	OpFalse

	OpEqual
	OpNotEqual
	OpGreaterThan
	OpAnd
	OpOr

	OpMinus
	OpBang

	OpPop

	OpGotoNotTruthy // goto only if value on top of the stack is not truthy
	OpGoto

	OpNull

	OpGetGlobal
	OpSetGlobal

	OpGetLocal
	OpSetLocal

	OpGetStdlib

	OpArray
	OpHashMap

	OpIndex

	OpCall

	OpReturnValue
	OpReturn
)

type Operation

type Operation struct {
	Name          string
	OperandWidths []int
}

func LookupOperation

func LookupOperation(opcode byte) (*Operation, error)