Will Hawkins
71 lines
1.8 KiB
Swift
71 lines
1.8 KiB
Swift
// p4rse, Copyright 2026, Will Hawkins
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//
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// This file is part of p4rse.
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//
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// This file is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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public enum Result<OKT>: Equatable {
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case Ok(OKT)
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case Error(any Errorable)
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public static func == (lhs: Result, rhs: Result) -> Bool {
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switch (lhs, rhs) {
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case (Ok, Ok):
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return true
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case (Error(let le), Error(let re)):
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return le.eq(re)
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default:
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return false
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}
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}
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public func ok() -> Bool {
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switch self {
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case .Ok(_): true
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case .Error(_): false
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}
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}
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public func error() -> (any Errorable)? {
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if case Result.Error(let e) = self {
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return e
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}
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return nil
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}
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public func map<T>(block: (OKT) -> Result<T>) -> Result<T> {
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switch self {
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case .Ok(let ok): return block(ok)
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case .Error(let e): return .Error(e)
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}
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}
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public func map_err(block: (any Errorable) -> Result) -> Result {
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switch self {
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case .Ok(let ok): return .Ok(ok)
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case .Error(let e): return block(e)
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}
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}
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}
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extension Result: CustomStringConvertible where OKT: CustomStringConvertible {
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public var description: String {
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switch self {
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case Result.Error(let e):
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return e.format()
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case Result.Ok(let o):
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return "Ok: \(o)"
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}
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}
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}
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