39 lines
685 B
Go
39 lines
685 B
Go
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// Copyright 2016 The Xorm Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package builder
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// Cond defines an interface
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type Cond interface {
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WriteTo(Writer) error
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And(...Cond) Cond
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Or(...Cond) Cond
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IsValid() bool
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}
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type condEmpty struct{}
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var _ Cond = condEmpty{}
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// NewCond creates an empty condition
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func NewCond() Cond {
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return condEmpty{}
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}
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func (condEmpty) WriteTo(w Writer) error {
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return nil
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}
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func (condEmpty) And(conds ...Cond) Cond {
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return And(conds...)
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}
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func (condEmpty) Or(conds ...Cond) Cond {
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return Or(conds...)
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}
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func (condEmpty) IsValid() bool {
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return false
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}
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