53 lines
1.2 KiB
Swift
53 lines
1.2 KiB
Swift
import Foundation
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/// A container for template variables.
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public class Context : Equatable {
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var dictionaries:[Dictionary<String, AnyObject>]
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public init(dictionary:Dictionary<String, AnyObject>) {
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dictionaries = [dictionary]
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}
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public init() {
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dictionaries = []
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}
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public subscript(key: String) -> AnyObject? {
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/// Retrieves a variable's value, starting at the current context and going upwards
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get {
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for dictionary in reverse(dictionaries) {
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if let value:AnyObject = dictionary[key] {
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return value
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}
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}
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return nil
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}
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/// Set a variable in the current context, deleting the variable if it's nil
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set(value) {
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if dictionaries.count > 0 {
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var dictionary = dictionaries.removeLast()
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dictionary[key] = value
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dictionaries.append(dictionary)
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}
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}
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}
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public func push() {
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push(Dictionary<String, AnyObject>())
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}
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public func push(dictionary:Dictionary<String, AnyObject>) {
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dictionaries.append(dictionary)
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}
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public func pop() {
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dictionaries.removeLast()
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}
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}
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public func ==(lhs:Context, rhs:Context) -> Bool {
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return lhs.dictionaries == rhs.dictionaries
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}
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