vm

package
v0.1.0 Latest Latest
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 Go to latest Published: Oct 29, 2021 License: MIT Imports: 18 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	CallArgCountMask uint32 = 0x3FFFFFFF
	CallExpandFlag   uint32 = 0x80000000
	CallPipelineFlag uint32 = 0x40000000
)

Variables

View Source 
var (
	True  = Bool{true}
	False = Bool{false}
)
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var ErrCannotCallNil = errors.New("cannot evaluate function call because target is nil")
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var ErrDivideByZero = errors.New("divide by zero")
View Source 
var ErrIsNotIterable = errors.New("is not iterable")
View Source 
var ErrIsNotReadable = errors.New("is not readable")

Functions

func CoerceToBool 

func CoerceToBool(v Value) bool

func IsIterable 

func IsIterable(v Value) bool

func IsReadable 

func IsReadable(v Value) bool

func ToString 

func ToString(v Value) string

func TypeName 

func TypeName(v Value) string

Types

type Array 

type Array struct {
	// contains filtered or unexported fields
}

func NewArray 

func NewArray() *Array

func NewArrayWithSlice 

func NewArrayWithSlice(s []Value) *Array

func (*Array) Add 

func (a *Array) Add(v Value)

func (*Array) Back 

func (a *Array) Back() Value

func (*Array) EvalOp 

func (a *Array) EvalOp(op Op, operand Value) (Value, error)

func (*Array) Get 

func (a *Array) Get(index int) Value

func (*Array) Index 

func (a *Array) Index(key Value) (Value, error)

func (*Array) IndexRef 

func (a *Array) IndexRef(key Value) (ValueRef, error)

func (*Array) Len 

func (a *Array) Len() int

func (*Array) MakeIterator 

func (a *Array) MakeIterator() Iterator

func (*Array) Put 

func (a *Array) Put(index int, v Value)

func (*Array) Slice 

func (a *Array) Slice(b, e Value) (Value, error)

func (*Array) String 

func (a *Array) String() string

func (*Array) Type 

func (a *Array) Type() string

type BaseValue 

type BaseValue struct {
	TypeName string
}

func (BaseValue) EvalOp 

func (v BaseValue) EvalOp(op Op, operand Value) (Value, error)

func (BaseValue) String 

func (v BaseValue) String() string

func (BaseValue) Type 

func (v BaseValue) Type() string

type Bool 

type Bool struct {
	// contains filtered or unexported fields
}

func NewBool 

func NewBool(v bool) Bool

func (Bool) Bool 

func (b Bool) Bool() bool

func (Bool) EvalOp 

func (b Bool) EvalOp(op Op, operand Value) (Value, error)

func (Bool) String 

func (b Bool) String() string

func (Bool) Type 

func (b Bool) Type() string

type Callable 

type Callable interface {
	Value
	Call(m *VM, args []Value, nRet int) ([]Value, error)
}

type CloseFn 

type CloseFn func(m *VM) error

type Closer 

type Closer interface {
	Value
	io.Closer
}

type Closure 

type Closure struct {
	// contains filtered or unexported fields
}

func (*Closure) Call 

func (c *Closure) Call(m *VM, args []Value, nRet int) ([]Value, error)

func (*Closure) EvalOp 

func (c *Closure) EvalOp(op Op, operand Value) (Value, error)

func (*Closure) String 

func (c *Closure) String() string

func (*Closure) Type 

func (c *Closure) Type() string

type Emitter 

type Emitter struct {
	// contains filtered or unexported fields
}

func NewEmitter 

func NewEmitter() *Emitter

func (*Emitter) AddExternalFunc 

func (e *Emitter) AddExternalFunc(fn NativeFn) int

func (*Emitter) AddGlobalParam 

func (e *Emitter) AddGlobalParam(
	name string,
	global int,
) bool

func (*Emitter) AddLiteral 

func (e *Emitter) AddLiteral(v Value) int

func (*Emitter) AddString 

func (e *Emitter) AddString(s string) int

func (*Emitter) Emit 

func (e *Emitter) Emit(pos token.Pos, op OpCode, operand1 uint32, operand2 uint16)

func (*Emitter) EmitJump 

func (e *Emitter) EmitJump(pos token.Pos, op OpCode, label *Label, operand2 uint16)

func (*Emitter) NewFn 

func (e *Emitter) NewFn(name string) int

func (*Emitter) NewLabel 

func (e *Emitter) NewLabel() *Label

func (*Emitter) PopFn 

func (e *Emitter) PopFn()

func (*Emitter) PushFn 

func (e *Emitter) PushFn(fn int)

func (*Emitter) ResolveLabel 

func (e *Emitter) ResolveLabel(label *Label)

func (*Emitter) SetFuncMinArgs 

func (e *Emitter) SetFuncMinArgs(n int)

func (*Emitter) SetGlobalCount 

func (e *Emitter) SetGlobalCount(n int)

func (*Emitter) ToProgram 

func (e *Emitter) ToProgram() *Program

type Float 

type Float struct {
	// contains filtered or unexported fields
}

func NewFloat 

func NewFloat(v float64) Float

func (Float) EvalOp 

func (f Float) EvalOp(op Op, operand Value) (Value, error)

func (Float) Float64 

func (f Float) Float64() float64

func (Float) String 

func (f Float) String() string

func (Float) Type 

func (f Float) Type() string

type Fn 

type Fn struct {
	// contains filtered or unexported fields
}

func (*Fn) Call 

func (f *Fn) Call(m *VM, args []Value, nRet int) ([]Value, error)

func (*Fn) EvalOp 

func (f *Fn) EvalOp(op Op, operand Value) (Value, error)

func (*Fn) String 

func (f *Fn) String() string

func (*Fn) Type 

func (f *Fn) Type() string

type FrameCrumb 

type FrameCrumb struct {
	// contains filtered or unexported fields
}

func (*FrameCrumb) IsZero 

func (c *FrameCrumb) IsZero() bool

type FrameInfo 

type FrameInfo struct {
	Filename string
	Line     int
	Func     string
}

func (FrameInfo) String 

func (i FrameInfo) String() string

type ILIterator 

type ILIterator struct {
	// contains filtered or unexported fields
}

func (*ILIterator) EvalOp 

func (e *ILIterator) EvalOp(op Op, operand Value) (Value, error)

func (*ILIterator) IterNRet 

func (i *ILIterator) IterNRet() int

func (*ILIterator) String 

func (e *ILIterator) String() string

func (*ILIterator) Type 

func (e *ILIterator) Type() string

type Indexable 

type Indexable interface {
	Value
	Index(key Value) (Value, error)
	IndexRef(key Value) (ValueRef, error)
}

type Instr 

type Instr struct {
	// contains filtered or unexported fields
}

type Int 

type Int struct {
	// contains filtered or unexported fields
}

func NewInt 

func NewInt(v int64) Int

func (Int) EvalOp 

func (i Int) EvalOp(op Op, operand Value) (Value, error)

func (Int) Int64 

func (i Int) Int64() int64

func (Int) String 

func (i Int) String() string

func (Int) Type 

func (i Int) Type() string

type InvalidUsageError 

type InvalidUsageError struct {
	// contains filtered or unexported fields
}

func NewInvalidUsageError 

func NewInvalidUsageError(expected string) *InvalidUsageError

func (*InvalidUsageError) Error 

func (e *InvalidUsageError) Error() string

type Iterable 

type Iterable interface {
	Value
	MakeIterator() Iterator
}

type Iterator 

type Iterator interface {
	Value
	IterNRet() int
	// contains filtered or unexported methods
}

func MakeIterator 

func MakeIterator(m *VM, v Value) (Iterator, error)

func NewIterator 

func NewIterator(extFn NativeFn, closeFn CloseFn, nret int) Iterator

type Label 

type Label struct {
	// contains filtered or unexported fields
}

type Location 

type Location struct {
	// contains filtered or unexported fields
}

type NativeFn 

type NativeFn func(m *VM, args []Value, nRet int) ([]Value, error)

func (NativeFn) Call 

func (f NativeFn) Call(m *VM, args []Value, nRet int) ([]Value, error)

func (NativeFn) EvalOp 

func (f NativeFn) EvalOp(op Op, operand Value) (Value, error)

func (NativeFn) String 

func (f NativeFn) String() string

func (NativeFn) Type 

func (f NativeFn) Type() string

type NativeIterator 

type NativeIterator struct {
	// contains filtered or unexported fields
}

func (*NativeIterator) Close 

func (i *NativeIterator) Close(m *VM) error

func (*NativeIterator) Closed 

func (i *NativeIterator) Closed() bool

func (*NativeIterator) EvalOp 

func (i *NativeIterator) EvalOp(op Op, operand Value) (Value, error)

func (*NativeIterator) IterNRet 

func (i *NativeIterator) IterNRet() int

func (*NativeIterator) String 

func (i *NativeIterator) String() string

func (*NativeIterator) Type 

func (i *NativeIterator) Type() string

type Object 

type Object struct {
	// contains filtered or unexported fields
}

func NewObject 

func NewObject() *Object

func NewObjectWithCapacity 

func NewObjectWithCapacity(c int) *Object

func (*Object) Delete 

func (o *Object) Delete(key Value)

func (*Object) EvalOp 

func (o *Object) EvalOp(op Op, operand Value) (Value, error)

func (*Object) ForEach 

func (o *Object) ForEach(f func(k, v Value) bool)

func (*Object) Get 

func (o *Object) Get(k Value) (Value, bool)

func (*Object) GetFirst 

func (o *Object) GetFirst() (key Value, val Value)

func (*Object) GetNext 

func (o *Object) GetNext(key Value) (nextKey Value, nextVal Value)

func (*Object) Has 

func (o *Object) Has(k Value) bool

func (*Object) Index 

func (o *Object) Index(k Value) (Value, error)

func (*Object) IndexRef 

func (o *Object) IndexRef(k Value) (ValueRef, error)

func (*Object) Len 

func (o *Object) Len() int

func (*Object) MakeIterator 

func (o *Object) MakeIterator() Iterator

func (*Object) Put 

func (o *Object) Put(k, v Value)

func (*Object) String 

func (o *Object) String() string

func (*Object) Type 

func (o *Object) Type() string

type Op 

type Op byte
const (
	OpUMinus Op = iota
	OpAdd
	OpSub
	OpMult
	OpDiv
	OpMod
	OpLT
	OpLE
	OpGT
	OpGE
	OpEq
	OpNE
)

type OpCode 

type OpCode byte
const (
	OpNop OpCode = iota
	OpJump
	OpJumpIfTrue
	OpJumpIfFalse
	OpDup
	OpPop
	OpCall
	OpNil
	OpNewClosure
	OpNewInt
	OpNewBool
	OpNewObject
	OpNewArray
	OpLoadGlobal
	OpLoadGlobalRef
	OpLoadGlobalDeref
	OpLoadLocal
	OpLoadLocalRef
	OpLoadLocalDeref
	OpCaptureLocal
	OpLoadArg
	OpLoadArgRef
	OpLoadArgDeref
	OpCaptureArg
	OpLoadCapture
	OpLoadCaptureRef
	OpLoadFn
	OpLoadNativeFn
	OpLoadLiteral
	OpEvalBinOp
	OpNot
	OpUnaryMinus
	OpObjectPutNoPop
	OpObjectGet
	OpObjectGetRef
	OpArrayAppendNoPop
	OpRet
	OpStore
	OpInitCallFrame
	OpMakeIter
	OpBeginTry
	OpEndTry
	OpSwap
	OpThrow
	OpDefer
	OpNext
	OpSlice
	OpIterYield
	OpIterRet
	OpNewIter
	OpLiftArg
	OpInitLiftedLocal
	OpInitLiftedGlobal
)

type Param 

type Param struct {
	// contains filtered or unexported fields
}

type Program 

type Program struct {
	Metadata *meta.Metadata
	// contains filtered or unexported fields
}

type Readable 

type Readable interface {
	Value
	MakeReader() Reader
}

type Reader 

type Reader interface {
	Value
	io.Reader
}

func MakeReader 

func MakeReader(vm *VM, v Value) (Reader, error)

type Regex 

type Regex struct {
	*regexp.Regexp
}

func NewRegex 

func NewRegex(r *regexp.Regexp) *Regex

func (*Regex) EvalOp 

func (r *Regex) EvalOp(op Op, operand Value) (Value, error)

func (*Regex) String 

func (r *Regex) String() string

func (*Regex) Type 

func (r *Regex) Type() string

type RuntimeError 

type RuntimeError struct {
	Err      error
	ErrValue Value
	Stack    []FrameInfo
}

func (*RuntimeError) Error 

func (e *RuntimeError) Error() string

func (*RuntimeError) EvalOp 

func (e *RuntimeError) EvalOp(op Op, operand Value) (Value, error)

func (*RuntimeError) Index 

func (e *RuntimeError) Index(k Value) (Value, error)

func (*RuntimeError) IndexRef 

func (e *RuntimeError) IndexRef(k Value) (ValueRef, error)

func (*RuntimeError) Message 

func (e *RuntimeError) Message() string

func (*RuntimeError) String 

func (e *RuntimeError) String() string

func (*RuntimeError) Type 

func (e *RuntimeError) Type() string

func (*RuntimeError) Unwrap 

func (e *RuntimeError) Unwrap() error

type String 

type String struct {
	// contains filtered or unexported fields
}

func NewString 

func NewString(v string) String

func (String) EvalOp 

func (s String) EvalOp(op Op, operand Value) (Value, error)

func (String) EvalUnaryMinus 

func (s String) EvalUnaryMinus() (Value, error)

func (String) Index 

func (s String) Index(key Value) (Value, error)

func (String) IndexRef 

func (s String) IndexRef(key Value) (ValueRef, error)

func (String) Len 

func (s String) Len() int

func (String) MakeIterator 

func (s String) MakeIterator() Iterator

func (String) MakeReader 

func (s String) MakeReader() Reader

func (String) Slice 

func (s String) Slice(b, e Value) (Value, error)

func (String) String 

func (s String) String() string

func (String) Type 

func (s String) Type() string

type VM 

type VM struct {
	// contains filtered or unexported fields
}

func NewVM 

func NewVM(prog *Program) *VM

func (*VM) Block 

func (m *VM) Block(f func(ctx context.Context))

func (*VM) Call 

func (m *VM) Call(callable Value, args []Value, nret int) ([]Value, error)

func (*VM) Context 

func (m *VM) Context() context.Context

func (*VM) GetCallerArgs 

func (m *VM) GetCallerArgs() []Value

func (*VM) GetCallerNArg 

func (m *VM) GetCallerNArg() int

func (*VM) GetFrameCrumb 

func (m *VM) GetFrameCrumb(n int) FrameCrumb

func (*VM) GetFrameInfo 

func (m *VM) GetFrameInfo(crumb FrameCrumb) FrameInfo

func (*VM) GetStackInfo 

func (m *VM) GetStackInfo() []FrameInfo

func (*VM) GetUserData 

func (m *VM) GetUserData(key interface{}) interface{}

func (*VM) IsCallerPipeline 

func (m *VM) IsCallerPipeline() bool

func (*VM) IsPipeline 

func (m *VM) IsPipeline() bool

func (*VM) IterClose 

func (m *VM) IterClose(iter Iterator) error

func (*VM) IterNext 

func (m *VM) IterNext(iter Iterator, nret int) ([]Value, error)

func (*VM) PopContext 

func (m *VM) PopContext() context.Context

func (*VM) PushContext 

func (m *VM) PushContext(ctx context.Context)

func (*VM) RegisterCloser 

func (m *VM) RegisterCloser(c Closer)

func (*VM) Run 

func (m *VM) Run(args []Value) error

func (*VM) SetParam 

func (m *VM) SetParam(n string, v Value) error

func (*VM) SetUserData 

func (m *VM) SetUserData(key, value interface{})

func (*VM) ShuttingDown 

func (m *VM) ShuttingDown() bool

func (*VM) SignalError 

func (m *VM) SignalError(err error)

func (*VM) StartCoroutine 

func (m *VM) StartCoroutine(callable Value) error

func (*VM) UnregisterCloser 

func (m *VM) UnregisterCloser(c Closer)

type Value 

type Value interface {
	fmt.Stringer

	Type() string
	EvalOp(op Op, operand Value) (Value, error)
}

func EvalOp 

func EvalOp(op Op, operand1, operand2 Value) (Value, error)

type ValueRef 

type ValueRef struct {
	Ref *Value
}

func NewValueRef 

func NewValueRef(ref *Value) ValueRef

func (ValueRef) EvalOp 

func (r ValueRef) EvalOp(op Op, operand Value) (Value, error)

func (ValueRef) Refo 

func (r ValueRef) Refo() *Value

func (ValueRef) String 

func (r ValueRef) String() string

func (ValueRef) Type 

func (r ValueRef) Type() string

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