Implement py.None and NoneType

ncw · ncw · commit c305f3761a10 · 2013-11-21T18:40:12.000Z
diff --git a/py/none.go b/py/none.go
@@ -0,0 +1,23 @@
+// None objects
+
+package py
+
+type NoneType struct{}
+
+var (
+	NoneTypeType = NewType("NoneType", "")
+	// And the ubiquitous
+	None = NoneType(struct{}{})
+)
+
+// Type of this object
+func (s NoneType) Type() *Type {
+	return NoneTypeType
+}
+
+func (a NoneType) M__bool__() Object {
+	return False
+}
+
+// Check interface is satisfied
+var _ I__bool__ = None
diff --git a/py/py.go b/py/py.go
@@ -8,7 +8,7 @@ type Object interface {
 
 // Some well known objects
 var (
-	None, Elipsis Object
+	Ellipsis Object
 )
 
 // Called to create a new instance of class cls. __new__() is a static method (special-cased so you need not declare it as such) that takes the class of which an instance was requested as its first argument. The remaining arguments are those passed to the object constructor expression (the call to the class). The return value of __new__() should be the new object instance (usually an instance of cls).

Original file line number	Diff line number	Diff line change
`@@ -8,7 +8,7 @@ type Object interface {`
`8`	`8`
`9`	`9`	`// Some well known objects`
`10`	`10`	`var (`
`11`		`- None, Elipsis Object`
	`11`	`+ Ellipsis Object`
`12`	`12`	`)`
`13`	`13`
`14`	`14`	`// Called to create a new instance of class cls. __new__() is a static method (special-cased so you need not declare it as such) that takes the class of which an instance was requested as its first argument. The remaining arguments are those passed to the object constructor expression (the call to the class). The return value of __new__() should be the new object instance (usually an instance of cls).`