From 362af7e292c14d7bdaa9f3a7659d16ce61dbc3b4 Mon Sep 17 00:00:00 2001
From: quephird <danielle_kefford@hotmail.com>
Date: Sat, 30 Mar 2024 17:48:46 -0700
Subject: [PATCH] Added `keys` and `values` properties to `Dictionary`.

---
 slox.xcodeproj/project.pbxproj |  2 ++
 slox/NativeFunction.swift      | 22 ++++++++++++++++++++++
 slox/StandardLibrary.swift     |  8 ++++++++
 3 files changed, 32 insertions(+)

diff --git a/slox.xcodeproj/project.pbxproj b/slox.xcodeproj/project.pbxproj
index 8908bc0..9d17009 100644
--- a/slox.xcodeproj/project.pbxproj
+++ b/slox.xcodeproj/project.pbxproj
@@ -38,6 +38,7 @@
 		873CCB342B8EE0FF00FC249A /* Environment.swift in Sources */ = {isa = PBXBuildFile; fileRef = 873CCB322B8ED8B900FC249A /* Environment.swift */; };
 		8755B8B42B91983F00530DC4 /* UserDefinedFunction.swift in Sources */ = {isa = PBXBuildFile; fileRef = 87BAFC4A2B918C520013E5FE /* UserDefinedFunction.swift */; };
 		8755B8B52B91984C00530DC4 /* LoxCallable.swift in Sources */ = {isa = PBXBuildFile; fileRef = 87BAFC482B9179CB0013E5FE /* LoxCallable.swift */; };
+		8764AB632BB8E5A7006D4B9D /* StandardLibrary.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8792A9982BB36C66009842D8 /* StandardLibrary.swift */; };
 		876560032B882259002BDE42 /* TokenType.swift in Sources */ = {isa = PBXBuildFile; fileRef = 876560022B882259002BDE42 /* TokenType.swift */; };
 		876560052B8825AC002BDE42 /* Token.swift in Sources */ = {isa = PBXBuildFile; fileRef = 876560042B8825AC002BDE42 /* Token.swift */; };
 		876560072B8827F9002BDE42 /* Scanner.swift in Sources */ = {isa = PBXBuildFile; fileRef = 876560062B8827F9002BDE42 /* Scanner.swift */; };
@@ -319,6 +320,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				8764AB632BB8E5A7006D4B9D /* StandardLibrary.swift in Sources */,
 				8702307C2B9575610056FE57 /* ResolvedStatement.swift in Sources */,
 				873CCB2D2B8E88C900FC249A /* Interpreter.swift in Sources */,
 				876A31632B8987740085A350 /* ScanError.swift in Sources */,
diff --git a/slox/NativeFunction.swift b/slox/NativeFunction.swift
index 712e72e..effb7a5 100644
--- a/slox/NativeFunction.swift
+++ b/slox/NativeFunction.swift
@@ -12,6 +12,8 @@ enum NativeFunction: LoxCallable, Equatable, CaseIterable {
     case appendNative
     case deleteAtNative
     case removeValueNative
+    case keysNative
+    case valuesNative
 
     var arity: Int {
         switch self {
@@ -23,6 +25,10 @@ enum NativeFunction: LoxCallable, Equatable, CaseIterable {
             return 2
         case .removeValueNative:
             return 2
+        case .keysNative:
+            return 1
+        case .valuesNative:
+            return 1
         }
     }
 
@@ -57,6 +63,22 @@ enum NativeFunction: LoxCallable, Equatable, CaseIterable {
             let key = args[1]
 
             return loxDictionary.kvPairs.removeValue(forKey: key) ?? .nil
+        case .keysNative:
+            guard case .instance(let loxDictionary as LoxDictionary) = args[0] else {
+                throw RuntimeError.notAListOrDictionary
+            }
+
+            let keys = Array(loxDictionary.kvPairs.keys)
+
+            return try! interpreter.makeList(elements: keys)
+        case .valuesNative:
+            guard case .instance(let loxDictionary as LoxDictionary) = args[0] else {
+                throw RuntimeError.notAListOrDictionary
+            }
+
+            let values = Array(loxDictionary.kvPairs.values)
+
+            return try! interpreter.makeList(elements: values)
         }
     }
 }
diff --git a/slox/StandardLibrary.swift b/slox/StandardLibrary.swift
index 26e15be..1ab65f8 100644
--- a/slox/StandardLibrary.swift
+++ b/slox/StandardLibrary.swift
@@ -44,6 +44,14 @@ class List {
 }
 
 class Dictionary {
+    keys {
+        return keysNative(this);
+    }
+
+    values {
+        return valuesNative(this);
+    }
+
     removeValue(key) {
         return removeValueNative(this, key);
     }