initial commit

vendor/github.com/go-xorm/builder/cond_not.go

@@ -0,0 +1,53 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import "fmt"
+
+// Not defines NOT condition
+type Not [1]Cond
+
+var _ Cond = Not{}
+
+// WriteTo writes SQL to Writer
+func (not Not) WriteTo(w Writer) error {
+	if _, err := fmt.Fprint(w, "NOT "); err != nil {
+		return err
+	}
+	switch not[0].(type) {
+	case condAnd, condOr:
+		if _, err := fmt.Fprint(w, "("); err != nil {
+			return err
+		}
+	}
+
+	if err := not[0].WriteTo(w); err != nil {
+		return err
+	}
+
+	switch not[0].(type) {
+	case condAnd, condOr:
+		if _, err := fmt.Fprint(w, ")"); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// And implements And with other conditions
+func (not Not) And(conds ...Cond) Cond {
+	return And(not, And(conds...))
+}
+
+// Or implements Or with other conditions
+func (not Not) Or(conds ...Cond) Cond {
+	return Or(not, Or(conds...))
+}
+
+// IsValid tests if this condition is valid
+func (not Not) IsValid() bool {
+	return not[0] != nil && not[0].IsValid()
+}