all.go

// Copyright 2024 Liam White
//
// 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 core

// All matches all of the given parsers in order or rolls back the input.
func All[T any](parsers ...Parser[T]) Parser[[]T] {
	return func(in Input) ([]T, bool, error) {
		start := in.Checkpoint()
		match := make([]T, 0, len(parsers))
		for _, parser := range parsers {
			m, ok, err := parser(in)
			if err != nil || !ok {
				in.Restore(start)
				return nil, false, err
			}
			match = append(match, m)
		}
		return match, true, nil
	}
}