Pass all literal assignment tests

analyzer/assignment_test.go

@@ -113,7 +113,7 @@ testStringErr (test,
 
 func TestAssignmentLiteralErrInterfaceInt (test *testing.T) {
 testStringErr (test,
-"cannot use float literal as Bird", 6, 2,
+"cannot use integer literal as Bird", 4, 11,
 `
 Bird: ([fly distance:F64] [land])
 [main] = {
@@ -124,7 +124,7 @@ Bird: ([fly distance:F64] [land])
 
 func TestAssignmentLiteralErrInterfaceFloat (test *testing.T) {
 testStringErr (test,
-"cannot use integer literal as Bird", 6, 2,
+"cannot use float literal as Bird", 4, 11,
 `
 Bird: ([fly distance:F64] [land])
 [main] = {
@@ -135,7 +135,7 @@ Bird: ([fly distance:F64] [land])
 
 func TestAssignmentLiteralErrInterfaceArray (test *testing.T) {
 testStringErr (test,
-"cannot use array literal as Bird", 6, 2,
+"cannot use array literal as Bird", 4, 11,
 `
 Bird: ([fly distance:F64] [land])
 [main] = {
@@ -146,11 +146,9 @@ Bird: ([fly distance:F64] [land])
 
 func TestAssignmentLiteralErrInterfaceStruct (test *testing.T) {
 testStringErr (test,
-"cannot assign literal to interface", 6, 2,
+"cannot use struct literal as Bird", 4, 11,
 `
 Bird: ([fly distance:F64] [land])
-BlueJay: Int
-BlueJay::[land] = { }
 [main] = {
 	b:Bird = (x: 5 y: 6)
 }

analyzer/literal.go

@@ -54,21 +54,21 @@ func (this *Tree) analyzeLiteralArray (
 	entity.Expression,
 	error,
 ) {
-	into = this.reduceToBase(into)
+	base := this.reduceToBase(into)
 	var elementType entity.Type
-	switch into.(type) {
+	switch base.(type) {
 	case *entity.TypeArray:
-		into := into.(*entity.TypeArray)
+		base := base.(*entity.TypeArray)
-		if into.Length != len(literal.Elements) {
+		if base.Length != len(literal.Elements) {
 			return nil, participle.Errorf (
 				literal.Pos, "expected %v elements",
-				into.Length)
+				base.Length)
 		}
-		elementType = into.Element
+		elementType = base.Element
 		
 	case *entity.TypeSlice:
-		into := into.(*entity.TypeSlice)
+		base := base.(*entity.TypeSlice)
-		elementType = into.Element
+		elementType = base.Element
 	default:
 		return nil, participle.Errorf (
 			literal.Pos, "cannot use array literal as %v",