1 files changed, 103 insertions, 0 deletions
diff --git a/vendor/github.com/robertkrimen/otto/type_reference.go b/vendor/github.com/robertkrimen/otto/type_reference.go
new file mode 100644
index 000000000..fd770c6f4
--- /dev/null
+++ b/vendor/github.com/robertkrimen/otto/type_reference.go
@@ -0,0 +1,103 @@
+package otto
+
+type _reference interface {
+	invalid() bool         // IsUnresolvableReference
+	getValue() Value       // getValue
+	putValue(Value) string // PutValue
+	delete() bool
+}
+
+// PropertyReference
+
+type _propertyReference struct {
+	name    string
+	strict  bool
+	base    *_object
+	runtime *_runtime
+	at      _at
+}
+
+func newPropertyReference(rt *_runtime, base *_object, name string, strict bool, at _at) *_propertyReference {
+	return &_propertyReference{
+		runtime: rt,
+		name:    name,
+		strict:  strict,
+		base:    base,
+		at:      at,
+	}
+}
+
+func (self *_propertyReference) invalid() bool {
+	return self.base == nil
+}
+
+func (self *_propertyReference) getValue() Value {
+	if self.base == nil {
+		panic(self.runtime.panicReferenceError("'%s' is not defined", self.name, self.at))
+	}
+	return self.base.get(self.name)
+}
+
+func (self *_propertyReference) putValue(value Value) string {
+	if self.base == nil {
+		return self.name
+	}
+	self.base.put(self.name, value, self.strict)
+	return ""
+}
+
+func (self *_propertyReference) delete() bool {
+	if self.base == nil {
+		// TODO Throw an error if strict
+		return true
+	}
+	return self.base.delete(self.name, self.strict)
+}
+
+// ArgumentReference
+
+func newArgumentReference(runtime *_runtime, base *_object, name string, strict bool, at _at) *_propertyReference {
+	if base == nil {
+		panic(hereBeDragons())
+	}
+	return newPropertyReference(runtime, base, name, strict, at)
+}
+
+type _stashReference struct {
+	name   string
+	strict bool
+	base   _stash
+}
+
+func (self *_stashReference) invalid() bool {
+	return false // The base (an environment) will never be nil
+}
+
+func (self *_stashReference) getValue() Value {
+	return self.base.getBinding(self.name, self.strict)
+}
+
+func (self *_stashReference) putValue(value Value) string {
+	self.base.setValue(self.name, value, self.strict)
+	return ""
+}
+
+func (self *_stashReference) delete() bool {
+	if self.base == nil {
+		// This should never be reached, but just in case
+		return false
+	}
+	return self.base.deleteBinding(self.name)
+}
+
+// getIdentifierReference
+
+func getIdentifierReference(runtime *_runtime, stash _stash, name string, strict bool, at _at) _reference {
+	if stash == nil {
+		return newPropertyReference(runtime, nil, name, strict, at)
+	}
+	if stash.hasBinding(name) {
+		return stash.newReference(name, strict, at)
+	}
+	return getIdentifierReference(runtime, stash.outer(), name, strict, at)
+}