structmappers

func AppendFields ¶

func AppendFields(fields []morph.Field) morph.StructMapper

AppendFields returns a new morph.StructMapper that adds the given fields to the end of a struct's list of fields.

AppendFields is reversible with Reverse.

func Compose ¶

func Compose(mappers ...morph.StructMapper) morph.StructMapper

Compose returns a new morph.StructMapper that applies each of the given non-nil mappers, from left to right. Nil mappers are skipped.

func PrependFields ¶

func PrependFields(fields []morph.Field) func(in morph.Struct) morph.Struct

PrependFields returns a new morph.StructMapper that inserts the given fields at the start of a struct's list of fields.

PrependFields is reversible with Reverse.

func Rename ¶

func Rename(name string) morph.StructMapper

Rename returns a new morph.StructMapper that sets the struct's name to the provided string.

In the provided name, the token "$" is rewritten to the existing name. For example, Rename("$Xml") on a struct named "Foo" maps to a struct named "FooXml".

Rename is reversible with Reverse.

package main

import (
	"fmt"

	"github.com/tawesoft/morph"
	"github.com/tawesoft/morph/structmappers"
)

func must[X any](value X, err error) X {
	if err != nil {
		panic(err)
	}
	return value
}

func main() {
	source := `
package example

type Apple struct {
    Picked    time.Time
    LastEaten time.Time
    Weight    weight.Weight
    Price     price.Price
}
`

	apple := must(morph.ParseStruct("test.go", source, "Apple"))
	orange := apple.Map(structmappers.Rename("Orange"))
	fmt.Println(orange)

	appleAgain := orange.Map(structmappers.Reverse)
	fmt.Println(appleAgain)

}

Output:

type Orange struct {
	Picked    time.Time
	LastEaten time.Time
	Weight    weight.Weight
	Price     price.Price
}
type Apple struct {
	Picked    time.Time
	LastEaten time.Time
	Weight    weight.Weight
	Price     price.Price
}

func Reverse ¶

func Reverse(input morph.Struct) morph.Struct

Reverse is a morph.StructMapper that maps a mapped struct back to its original, to the extent that this is possible, by applying the reverse StructMapper.

func SetComment ¶

func SetComment(comment string) morph.StructMapper

SetComment returns a new morph.StructMapper that sets the struct's comment to the provided string.

func StripComment ¶

func StripComment(s morph.Struct) morph.Struct

StripComment is a morph.StructMapper that sets the struct's comment to the empty string.