gen

package main

import (
	"fmt"

	"github.com/0x51-dev/upeg/abnf/gen"
)

func main() {
	g := gen.Generator{
		PackageName: "custom",
		CustomOperators: map[string]struct{}{
			"custom":   {},
			"alpha":    {},
			"alphaNum": {},
			"HEXDIG":   {},
		},
	}
	raw, _ := g.GenerateOperators([]rune("grammar = alpha alphaNum HEXDIG\ncustom = alpha\n"))
	fmt.Println(raw)
}

Output:

// Package custom is autogenerated by https://github.com/0x51-dev/upeg. DO NOT EDIT.
package custom

import (
    "github.com/0x51-dev/upeg/parser/op"
)

var (
    Grammar = op.Capture{Name: "Grammar", Value: op.And{AlphaOperator{}, AlphaNumOperator{}, HEXDIGOperator{}}}
    Custom = CustomOperator{} // op.Capture{Name: "Custom", Value: AlphaOperator{}}
)

package main

import (
	"fmt"

	"github.com/0x51-dev/upeg/abnf/gen"
)

func main() {
	g := gen.Generator{
		PackageName: "external",
		ExternalDependencies: map[string]gen.ExternalDependency{
			"alpha": {
				Name: "a",
				Path: "example.com/a",
			},
			"alphaNum": {
				Name: "an",
				Path: "example.com/an",
			},
			"HEXDIG": {
				Name: "hd",
				Path: "example.com/hd",
			},
		},
	}
	raw, _ := g.GenerateOperators([]rune("grammar = alpha alphaNum HEXDIG\n"))
	fmt.Println(raw)
}

Output:

// Package external is autogenerated by https://github.com/0x51-dev/upeg. DO NOT EDIT.
package external

import (
    "example.com/a"
    "example.com/an"
    "example.com/hd"
    "github.com/0x51-dev/upeg/parser/op"
)

var (
    Grammar = op.Capture{Name: "Grammar", Value: op.And{a.Alpha, an.AlphaNum, hd.HEXDIG}}
)