Remove unused cast interface.

sqlite/cast.go

@@ -4,52 +4,44 @@ import (
 	"github.com/go-jet/jet/v2/internal/jet"
 )
 
-type cast interface {
-	AS(castType string) Expression
-	AS_TEXT() StringExpression
-	AS_NUMERIC() FloatExpression
-	AS_INTEGER() IntegerExpression
-	AS_REAL() FloatExpression
-	AS_BLOB() StringExpression
-}
-
-type castImpl struct {
+type cast struct {
 	jet.Cast
 }
 
 // CAST function converts a expr (of any type) into latter specified datatype.
-func CAST(expr Expression) cast {
-	castImpl := &castImpl{}
-	castImpl.Cast = jet.NewCastImpl(expr)
-	return castImpl
+func CAST(expr Expression) *cast {
+	ret := &cast{}
+	ret.Cast = jet.NewCastImpl(expr)
+
+	return ret
 }
 
 // AS casts expressions to castType
-func (c *castImpl) AS(castType string) Expression {
+func (c *cast) AS(castType string) Expression {
 	return c.Cast.AS(castType)
 }
 
 // AS_TEXT cast expression to TEXT type
-func (c *castImpl) AS_TEXT() StringExpression {
+func (c *cast) AS_TEXT() StringExpression {
 	return StringExp(c.AS("TEXT"))
 }
 
 // AS_NUMERIC cast expression to NUMERIC type
-func (c *castImpl) AS_NUMERIC() FloatExpression {
+func (c *cast) AS_NUMERIC() FloatExpression {
 	return FloatExp(c.AS("NUMERIC"))
 }
 
 // AS_INTEGER cast expression to INTEGER type
-func (c *castImpl) AS_INTEGER() IntegerExpression {
+func (c *cast) AS_INTEGER() IntegerExpression {
 	return IntExp(c.AS("INTEGER"))
 }
 
 // AS_REAL cast expression to REAL type
-func (c *castImpl) AS_REAL() FloatExpression {
+func (c *cast) AS_REAL() FloatExpression {
 	return FloatExp(c.AS("REAL"))
 }
 
 // AS_BLOB cast expression to BLOB type
-func (c *castImpl) AS_BLOB() StringExpression {
+func (c *cast) AS_BLOB() StringExpression {
 	return StringExp(c.AS("BLOB"))
 }