Merge pull request #18 from hashicorp/paddy_deep_is

Add the ability to do a deep comparison in Is.

Author: Paddy

tfprotov5/tftypes/list.go

@@ -7,7 +7,13 @@ type List struct {
 }
 
 func (l List) Is(t Type) bool {
-	_, ok := t.(List)
+	v, ok := t.(List)
+	if !ok {
+		return false
+	}
+	if v.ElementType != nil {
+		return l.ElementType.Is(v.ElementType)
+	}
 	return ok
 }
 

tfprotov5/tftypes/map.go

@@ -7,7 +7,13 @@ type Map struct {
 }
 
 func (m Map) Is(t Type) bool {
-	_, ok := t.(Map)
+	v, ok := t.(Map)
+	if !ok {
+		return false
+	}
+	if v.AttributeType != nil {
+		return m.AttributeType.Is(v.AttributeType)
+	}
 	return ok
 }
 

tfprotov5/tftypes/object.go

@@ -7,7 +7,23 @@ type Object struct {
 }
 
 func (o Object) Is(t Type) bool {
-	_, ok := t.(Object)
+	v, ok := t.(Object)
+	if !ok {
+		return false
+	}
+	if v.AttributeTypes != nil {
+		if len(o.AttributeTypes) != len(v.AttributeTypes) {
+			return false
+		}
+		for k, typ := range o.AttributeTypes {
+			if _, ok := v.AttributeTypes[k]; !ok {
+				return false
+			}
+			if !typ.Is(v.AttributeTypes[k]) {
+				return false
+			}
+		}
+	}
 	return ok
 }
 

tfprotov5/tftypes/set.go

@@ -7,7 +7,13 @@ type Set struct {
 }
 
 func (s Set) Is(t Type) bool {
-	_, ok := t.(Set)
+	v, ok := t.(Set)
+	if !ok {
+		return false
+	}
+	if v.ElementType != nil {
+		return s.ElementType.Is(v.ElementType)
+	}
 	return ok
 }
 

tfprotov5/tftypes/tuple.go

@@ -7,7 +7,20 @@ type Tuple struct {
 }
 
 func (tu Tuple) Is(t Type) bool {
-	_, ok := t.(Tuple)
+	v, ok := t.(Tuple)
+	if !ok {
+		return false
+	}
+	if v.ElementTypes != nil {
+		if len(v.ElementTypes) != len(tu.ElementTypes) {
+			return false
+		}
+		for pos, typ := range tu.ElementTypes {
+			if !typ.Is(v.ElementTypes[pos]) {
+				return false
+			}
+		}
+	}
 	return ok
 }