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// The MIT License (MIT) // // Copyright (c) 2016 Luke Zhao <me@lkzhao.com> // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE.
import UIKit
public protocol HeroStringConvertible { static func from(node: ExprNode) -> Self? }
extension String { func parse<T: HeroStringConvertible>() -> [T]? { let lexer = Lexer(input: self) let parser = Parser(tokens: lexer.tokenize()) do { let nodes = try parser.parse() var results = [T]() for node in nodes { if let modifier = T.from(node: node) { results.append(modifier) } else { print("\(node.name) doesn't exist in \(T.self)") } } return results } catch let error { print("failed to parse \"\(self)\", error: \(error)") } return nil }
func parseOne<T: HeroStringConvertible>() -> T? { return parse()?.last } }
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