expressions working

Signed-off-by: Casey Lee <cplee@nektos.com>

vendor/github.com/robertkrimen/otto/stash.go

@@ -0,0 +1,296 @@
+package otto
+
+import (
+	"fmt"
+)
+
+// ======
+// _stash
+// ======
+
+type _stash interface {
+	hasBinding(string) bool            //
+	createBinding(string, bool, Value) // CreateMutableBinding
+	setBinding(string, Value, bool)    // SetMutableBinding
+	getBinding(string, bool) Value     // GetBindingValue
+	deleteBinding(string) bool         //
+	setValue(string, Value, bool)      // createBinding + setBinding
+
+	outer() _stash
+	runtime() *_runtime
+
+	newReference(string, bool, _at) _reference
+
+	clone(clone *_clone) _stash
+}
+
+// ==========
+// _objectStash
+// ==========
+
+type _objectStash struct {
+	_runtime *_runtime
+	_outer   _stash
+	object   *_object
+}
+
+func (self *_objectStash) runtime() *_runtime {
+	return self._runtime
+}
+
+func (runtime *_runtime) newObjectStash(object *_object, outer _stash) *_objectStash {
+	if object == nil {
+		object = runtime.newBaseObject()
+		object.class = "environment"
+	}
+	return &_objectStash{
+		_runtime: runtime,
+		_outer:   outer,
+		object:   object,
+	}
+}
+
+func (in *_objectStash) clone(clone *_clone) _stash {
+	out, exists := clone.objectStash(in)
+	if exists {
+		return out
+	}
+	*out = _objectStash{
+		clone.runtime,
+		clone.stash(in._outer),
+		clone.object(in.object),
+	}
+	return out
+}
+
+func (self *_objectStash) hasBinding(name string) bool {
+	return self.object.hasProperty(name)
+}
+
+func (self *_objectStash) createBinding(name string, deletable bool, value Value) {
+	if self.object.hasProperty(name) {
+		panic(hereBeDragons())
+	}
+	mode := _propertyMode(0111)
+	if !deletable {
+		mode = _propertyMode(0110)
+	}
+	// TODO False?
+	self.object.defineProperty(name, value, mode, false)
+}
+
+func (self *_objectStash) setBinding(name string, value Value, strict bool) {
+	self.object.put(name, value, strict)
+}
+
+func (self *_objectStash) setValue(name string, value Value, throw bool) {
+	if !self.hasBinding(name) {
+		self.createBinding(name, true, value) // Configurable by default
+	} else {
+		self.setBinding(name, value, throw)
+	}
+}
+
+func (self *_objectStash) getBinding(name string, throw bool) Value {
+	if self.object.hasProperty(name) {
+		return self.object.get(name)
+	}
+	if throw { // strict?
+		panic(self._runtime.panicReferenceError("Not Defined", name))
+	}
+	return Value{}
+}
+
+func (self *_objectStash) deleteBinding(name string) bool {
+	return self.object.delete(name, false)
+}
+
+func (self *_objectStash) outer() _stash {
+	return self._outer
+}
+
+func (self *_objectStash) newReference(name string, strict bool, at _at) _reference {
+	return newPropertyReference(self._runtime, self.object, name, strict, at)
+}
+
+// =========
+// _dclStash
+// =========
+
+type _dclStash struct {
+	_runtime *_runtime
+	_outer   _stash
+	property map[string]_dclProperty
+}
+
+type _dclProperty struct {
+	value     Value
+	mutable   bool
+	deletable bool
+	readable  bool
+}
+
+func (runtime *_runtime) newDeclarationStash(outer _stash) *_dclStash {
+	return &_dclStash{
+		_runtime: runtime,
+		_outer:   outer,
+		property: map[string]_dclProperty{},
+	}
+}
+
+func (in *_dclStash) clone(clone *_clone) _stash {
+	out, exists := clone.dclStash(in)
+	if exists {
+		return out
+	}
+	property := make(map[string]_dclProperty, len(in.property))
+	for index, value := range in.property {
+		property[index] = clone.dclProperty(value)
+	}
+	*out = _dclStash{
+		clone.runtime,
+		clone.stash(in._outer),
+		property,
+	}
+	return out
+}
+
+func (self *_dclStash) hasBinding(name string) bool {
+	_, exists := self.property[name]
+	return exists
+}
+
+func (self *_dclStash) runtime() *_runtime {
+	return self._runtime
+}
+
+func (self *_dclStash) createBinding(name string, deletable bool, value Value) {
+	_, exists := self.property[name]
+	if exists {
+		panic(fmt.Errorf("createBinding: %s: already exists", name))
+	}
+	self.property[name] = _dclProperty{
+		value:     value,
+		mutable:   true,
+		deletable: deletable,
+		readable:  false,
+	}
+}
+
+func (self *_dclStash) setBinding(name string, value Value, strict bool) {
+	property, exists := self.property[name]
+	if !exists {
+		panic(fmt.Errorf("setBinding: %s: missing", name))
+	}
+	if property.mutable {
+		property.value = value
+		self.property[name] = property
+	} else {
+		self._runtime.typeErrorResult(strict)
+	}
+}
+
+func (self *_dclStash) setValue(name string, value Value, throw bool) {
+	if !self.hasBinding(name) {
+		self.createBinding(name, false, value) // NOT deletable by default
+	} else {
+		self.setBinding(name, value, throw)
+	}
+}
+
+// FIXME This is called a __lot__
+func (self *_dclStash) getBinding(name string, throw bool) Value {
+	property, exists := self.property[name]
+	if !exists {
+		panic(fmt.Errorf("getBinding: %s: missing", name))
+	}
+	if !property.mutable && !property.readable {
+		if throw { // strict?
+			panic(self._runtime.panicTypeError())
+		}
+		return Value{}
+	}
+	return property.value
+}
+
+func (self *_dclStash) deleteBinding(name string) bool {
+	property, exists := self.property[name]
+	if !exists {
+		return true
+	}
+	if !property.deletable {
+		return false
+	}
+	delete(self.property, name)
+	return true
+}
+
+func (self *_dclStash) outer() _stash {
+	return self._outer
+}
+
+func (self *_dclStash) newReference(name string, strict bool, _ _at) _reference {
+	return &_stashReference{
+		name: name,
+		base: self,
+	}
+}
+
+// ========
+// _fnStash
+// ========
+
+type _fnStash struct {
+	_dclStash
+	arguments           *_object
+	indexOfArgumentName map[string]string
+}
+
+func (runtime *_runtime) newFunctionStash(outer _stash) *_fnStash {
+	return &_fnStash{
+		_dclStash: _dclStash{
+			_runtime: runtime,
+			_outer:   outer,
+			property: map[string]_dclProperty{},
+		},
+	}
+}
+
+func (in *_fnStash) clone(clone *_clone) _stash {
+	out, exists := clone.fnStash(in)
+	if exists {
+		return out
+	}
+	dclStash := in._dclStash.clone(clone).(*_dclStash)
+	index := make(map[string]string, len(in.indexOfArgumentName))
+	for name, value := range in.indexOfArgumentName {
+		index[name] = value
+	}
+	*out = _fnStash{
+		_dclStash:           *dclStash,
+		arguments:           clone.object(in.arguments),
+		indexOfArgumentName: index,
+	}
+	return out
+}
+
+func getStashProperties(stash _stash) (keys []string) {
+	switch vars := stash.(type) {
+	case *_dclStash:
+		for k := range vars.property {
+			keys = append(keys, k)
+		}
+	case *_fnStash:
+		for k := range vars.property {
+			keys = append(keys, k)
+		}
+	case *_objectStash:
+		for k := range vars.object.property {
+			keys = append(keys, k)
+		}
+	default:
+		panic("unknown stash type")
+	}
+
+	return
+}