mirror of
https://github.com/wneessen/niljson.git
synced 2024-11-24 14:40:48 +01:00
Winni Neessen
63c28cbb9e
Introduced new types: NilUInt, NilUInt8, NilUInt16, NilUInt32, and NilUInt64 to support nullable unsigned integers. This enhancement aligns with existing nullable types for better consistency and flexibility.
88 lines
2 KiB
Go
88 lines
2 KiB
Go
// SPDX-FileCopyrightText: 2024 Winni Neessen <wn@neessen.dev>
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//
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// SPDX-License-Identifier: MIT
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package niljson
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import (
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"encoding/json"
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)
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// Variable is a generic variable type that can be null.
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type Variable[T any] struct {
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value T
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notNil bool
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}
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// Value returns the value of the Variable
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func (v *Variable[T]) Value() T {
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return v.value
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}
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// Get is an alias method for Value()
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func (v *Variable[T]) Get() T {
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return v.Value()
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}
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// NotNil returns true when a Variable is not nil
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func (v *Variable[T]) NotNil() bool {
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return v.notNil
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}
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// IsNil returns true when a Variable is nil
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func (v *Variable[T]) IsNil() bool {
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return !v.notNil
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}
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// Reset resets the value to the Variable to a zero value and sets it to be nil
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func (v *Variable[T]) Reset() {
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var newVal T
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v.value = newVal
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v.notNil = false
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}
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// NilBoolean is an boolean type that can be nil
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type NilBoolean = Variable[bool]
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// NilByteSlice is a []byte type that can be nil
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type NilByteSlice = Variable[[]byte]
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// NilInt is an int type that can be nil
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type NilInt = Variable[int]
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// NilInt64 is an int64 type that can be nil
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type NilInt64 = Variable[int64]
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// NilUInt is an uint type that can be nil
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type NilUInt = Variable[uint]
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// NilUInt8 is an uint8 type that can be nil
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type NilUInt8 = Variable[uint8]
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// NilUInt16 is an uint16 type that can be nil
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type NilUInt16 = Variable[uint16]
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// NilUInt32 is an uint32 type that can be nil
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type NilUInt32 = Variable[uint32]
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// NilUInt64 is an uint64 type that can be nil
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type NilUInt64 = Variable[uint64]
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// NilFloat32 is an float32 type that can be nil
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type NilFloat32 = Variable[float32]
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// NilFloat64 is an float64 type that can be nil
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type NilFloat64 = Variable[float64]
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// NilString is a string type that can be nil
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type NilString = Variable[string]
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// UnmarshalJSON interprets the generic Nil types and sets the value and notnil of the type
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func (v *Variable[T]) UnmarshalJSON(data []byte) error {
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if string(data) != "null" {
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v.value = *new(T)
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v.notNil = true
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return json.Unmarshal(data, &v.value)
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}
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return nil
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}
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