fp-go/di/injector.go

// Copyright (c) 2023 IBM Corp.
// All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package di

import (
	DIE "github.com/IBM/fp-go/di/erasure"
	F "github.com/IBM/fp-go/function"
	IG "github.com/IBM/fp-go/identity/generic"
	IOE "github.com/IBM/fp-go/ioeither"
	RIOE "github.com/IBM/fp-go/readerioeither"
)

// Resolve performs a type safe resolution of a dependency
func Resolve[T any](token InjectionToken[T]) RIOE.ReaderIOEither[DIE.InjectableFactory, error, T] {
	return F.Flow2(
		IG.Ap[DIE.InjectableFactory](asDependency(token)),
		IOE.ChainEitherK(token.Unerase),
	)
}