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The crud package implements its own optional types:
Lines 29 to 137 in 802aa24
| // OptUint is an optional uint. | |
| type OptUint struct { | |
| value uint | |
| exist bool | |
| } | |
| // MakeOptUint creates an optional uint from value. | |
| func MakeOptUint(value uint) OptUint { | |
| return OptUint{ | |
| value: value, | |
| exist: true, | |
| } | |
| } | |
| // Get returns the integer value or an error if not present. | |
| func (opt OptUint) Get() (uint, bool) { | |
| return opt.value, opt.exist | |
| } | |
| // OptInt is an optional int. | |
| type OptInt struct { | |
| value int | |
| exist bool | |
| } | |
| // MakeOptInt creates an optional int from value. | |
| func MakeOptInt(value int) OptInt { | |
| return OptInt{ | |
| value: value, | |
| exist: true, | |
| } | |
| } | |
| // Get returns the integer value or an error if not present. | |
| func (opt OptInt) Get() (int, bool) { | |
| return opt.value, opt.exist | |
| } | |
| // OptFloat64 is an optional float64. | |
| type OptFloat64 struct { | |
| value float64 | |
| exist bool | |
| } | |
| // MakeOptFloat64 creates an optional float64 from value. | |
| func MakeOptFloat64(value float64) OptFloat64 { | |
| return OptFloat64{ | |
| value: value, | |
| exist: true, | |
| } | |
| } | |
| // Get returns the float64 value or an error if not present. | |
| func (opt OptFloat64) Get() (float64, bool) { | |
| return opt.value, opt.exist | |
| } | |
| // OptString is an optional string. | |
| type OptString struct { | |
| value string | |
| exist bool | |
| } | |
| // MakeOptString creates an optional string from value. | |
| func MakeOptString(value string) OptString { | |
| return OptString{ | |
| value: value, | |
| exist: true, | |
| } | |
| } | |
| // Get returns the string value or an error if not present. | |
| func (opt OptString) Get() (string, bool) { | |
| return opt.value, opt.exist | |
| } | |
| // OptBool is an optional bool. | |
| type OptBool struct { | |
| value bool | |
| exist bool | |
| } | |
| // MakeOptBool creates an optional bool from value. | |
| func MakeOptBool(value bool) OptBool { | |
| return OptBool{ | |
| value: value, | |
| exist: true, | |
| } | |
| } | |
| // Get returns the boolean value or an error if not present. | |
| func (opt OptBool) Get() (bool, bool) { | |
| return opt.value, opt.exist | |
| } | |
| // OptTuple is an optional tuple. | |
| type OptTuple struct { | |
| tuple interface{} | |
| } | |
| // MakeOptTuple creates an optional tuple from tuple. | |
| func MakeOptTuple(tuple interface{}) OptTuple { | |
| return OptTuple{tuple} | |
| } | |
| // Get returns the tuple value or an error if not present. | |
| func (o *OptTuple) Get() (interface{}, bool) { | |
| return o.tuple, o.tuple != nil | |
| } |
But we already implement a library with optional types:
https://github.com/tarantool/go-option
The goal is to remove the use of custom optional types from the crud package, replacing them with the go-option's ones.
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