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Go language return value type inference open source project

Apr 29, 2024 am 11:36 AM
git golang go language Return value type inference

The open source project of Go language return value type inference can simplify Go language development. These projects include: 1. goreflect: Use reflection to identify functions and infer return value types; 2. gotypes: Use type interfaces to check values ​​and infer return value types; 3. (*function).Returns: Use the helpers provided by the exp/slices library Function infers return value type.

Go language return value type inference open source project

Go language return value type inference open source project

Return value type inference aims to automatically infer the return value of a function Type, simplifying the Go language development process. Here are some open source projects that provide implementations of this functionality:

1. goreflect

  • https://github.com/joel/ goreflect
  • Use reflection to identify functions and infer the return value type based on the function signature.

Practical case:

package main

import (
    "fmt"

    "github.com/joel/goreflect"
)

func getSum(a, b int) {
    fmt.Println("The sum of", a, "and", b, "is", a+b)
}

func main() {
    returnType := goreflect.FuncSig(getSum).Returns()
    fmt.Println("The return type of getSum is", returnType)
}
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2. gotypes

  • https://github.com /gobuffalo/gotypes
  • Use the type interface to dynamically check the value and infer the return value type based on the value type.

Practical case:

package main

import (
    "fmt"

    "github.com/gobuffalo/gotypes"
)

type MyString string

func getStringValue(s MyString) {
    fmt.Println("The value of s is", s)
}

func main() {
    returnType, _ := gotypes.Guess(getStringValue)
    fmt.Println("The return type of getStringValue is", returnType)
}
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3. (*function).Returns

  • https: //godoc.org/golang.org/x/exp/slices#function.Returns
  • Use the helper function provided by the exp/slices library to infer the return value type based on the function signature.

Practical case:

package main

import (
    "fmt"

    "golang.org/x/exp/slices"
)

func getDifference(a, b int) int {
    return a - b
}

func main() {
    returnType := slices.FuncSig(getDifference).Returns()
    fmt.Println("The return type of getDifference is", returnType)
}
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