Go language return value type inference open source project

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

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)
}

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)
}

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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