Add .findLast(), .findLastIndex(), and es2023 target

Author: m-basov

src/compiler/commandLineParser.ts

@@ -34,6 +34,7 @@ namespace ts {
         ["es2020", "lib.es2020.d.ts"],
         ["es2021", "lib.es2021.d.ts"],
         ["es2022", "lib.es2022.d.ts"],
+        ["es2023", "lib.es2023.d.ts"],
         ["esnext", "lib.esnext.d.ts"],
         // Host only
         ["dom", "lib.dom.d.ts"],
@@ -85,7 +86,8 @@ namespace ts {
         ["es2022.object", "lib.es2022.object.d.ts"],
         ["es2022.sharedmemory", "lib.es2022.sharedmemory.d.ts"],
         ["es2022.string", "lib.es2022.string.d.ts"],
-        ["esnext.array", "lib.es2022.array.d.ts"],
+        ["es2023.array", "lib.es2023.array.d.ts"],
+        ["esnext.array", "lib.es2023.array.d.ts"],
         ["esnext.symbol", "lib.es2019.symbol.d.ts"],
         ["esnext.asynciterable", "lib.es2018.asynciterable.d.ts"],
         ["esnext.intl", "lib.esnext.intl.d.ts"],
@@ -332,6 +334,7 @@ namespace ts {
             es2020: ScriptTarget.ES2020,
             es2021: ScriptTarget.ES2021,
             es2022: ScriptTarget.ES2022,
+            es2023: ScriptTarget.ES2023,
             esnext: ScriptTarget.ESNext,
         })),
         affectsSourceFile: true,

src/compiler/types.ts

@@ -6523,6 +6523,7 @@ namespace ts {
         ES2020 = 7,
         ES2021 = 8,
         ES2022 = 9,
+        ES2023 = 10,
         ESNext = 99,
         JSON = 100,
         Latest = ESNext,
@@ -7003,16 +7004,17 @@ namespace ts {
         ContainsTypeScript = 1 << 0,
         ContainsJsx = 1 << 1,
         ContainsESNext = 1 << 2,
-        ContainsES2022 = 1 << 3,
-        ContainsES2021 = 1 << 4,
-        ContainsES2020 = 1 << 5,
-        ContainsES2019 = 1 << 6,
-        ContainsES2018 = 1 << 7,
-        ContainsES2017 = 1 << 8,
-        ContainsES2016 = 1 << 9,
-        ContainsES2015 = 1 << 10,
-        ContainsGenerator = 1 << 11,
-        ContainsDestructuringAssignment = 1 << 12,
+        ContainsES2023 = 1 << 3,
+        ContainsES2022 = 1 << 4,
+        ContainsES2021 = 1 << 5,
+        ContainsES2020 = 1 << 6,
+        ContainsES2019 = 1 << 7,
+        ContainsES2018 = 1 << 8,
+        ContainsES2017 = 1 << 9,
+        ContainsES2016 = 1 << 10,
+        ContainsES2015 = 1 << 11,
+        ContainsGenerator = 1 << 12,
+        ContainsDestructuringAssignment = 1 << 13,
 
         // Markers
         // - Flags used to indicate that a subtree contains a specific transformation.
@@ -7042,6 +7044,7 @@ namespace ts {
         AssertTypeScript = ContainsTypeScript,
         AssertJsx = ContainsJsx,
         AssertESNext = ContainsESNext,
+        AssertES2023 = ContainsES2023,
         AssertES2022 = ContainsES2022,
         AssertES2021 = ContainsES2021,
         AssertES2020 = ContainsES2020,

src/compiler/utilities.ts

@@ -645,6 +645,20 @@ namespace ts {
                 BigUint64Array: ["at"],
                 ObjectConstructor: ["hasOwn"],
                 Error: ["cause"]
+            },
+            es2023: {
+                Array: ["findLast", "findLastIndex"],
+                Int8Array: ["findLast", "findLastIndex"],
+                Uint8Array: ["findLast", "findLastIndex"],
+                Uint8ClampedArray: ["findLast", "findLastIndex"],
+                Int16Array: ["findLast", "findLastIndex"],
+                Uint16Array: ["findLast", "findLastIndex"],
+                Int32Array: ["findLast", "findLastIndex"],
+                Uint32Array: ["findLast", "findLastIndex"],
+                Float32Array: ["findLast", "findLastIndex"],
+                Float64Array: ["findLast", "findLastIndex"],
+                BigInt64Array: ["findLast", "findLastIndex"],
+                BigUint64Array: ["findLast", "findLastIndex"]
             }
         };
     }

src/compiler/utilitiesPublic.ts

@@ -14,6 +14,8 @@ namespace ts {
         switch (getEmitScriptTarget(options)) {
             case ScriptTarget.ESNext:
                 return "lib.esnext.full.d.ts";
+            case ScriptTarget.ES2023:
+                return "lib.es2023.full.d.ts";
             case ScriptTarget.ES2022:
                 return "lib.es2022.full.d.ts";
             case ScriptTarget.ES2021:

src/lib/es2023.array.d.ts

@@ -0,0 +1,2 @@
+/// <reference lib="es2022" />
+/// <reference lib="es2023.array" />

src/lib/es2023.d.ts

@@ -0,0 +1,5 @@
+/// <reference lib="es2023" />
+/// <reference lib="dom" />
+/// <reference lib="webworker.importscripts" />
+/// <reference lib="scripthost" />
+/// <reference lib="dom.iterable" />

src/lib/es2023.full.d.ts

@@ -1,2 +1,2 @@
-/// <reference lib="es2022" />
+/// <reference lib="es2023" />
 /// <reference lib="esnext.intl" />

src/lib/esnext.d.ts

@@ -10,6 +10,7 @@
         "es2020",
         "es2021",
         "es2022",
+        "es2023",
         "esnext",
         // Host only
         "dom.generated",
@@ -61,6 +62,7 @@
         "es2022.object",
         "es2022.sharedmemory",
         "es2022.string",
+        "es2023.array",
         "esnext.intl",
         // Default libraries
         "es5.full",
@@ -72,6 +74,7 @@
         "es2020.full",
         "es2021.full",
         "es2022.full",
+        "es2023.full",
         "esnext.full"
     ],
     "paths": {

src/lib/libs.json

@@ -3584,6 +3584,7 @@ namespace ts.server.protocol {
         ES2020 = "ES2020",
         ES2021 = "ES2021",
         ES2022 = "ES2022",
+        ES2023 = "ES2023",
         ESNext = "ESNext"
     }
 

src/server/protocol.ts

@@ -159,7 +159,7 @@ namespace ts {
                         start: undefined,
                         length: undefined,
                     }, {
-                        messageText: "Argument for '--module' option must be: 'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015', 'es2020', 'es2022', 'esnext', 'node16', 'nodenext'.",
+                        messageText: "Argument for '--module' option must be: 'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015', 'es2020', 'es2022', 'es2023', 'esnext', 'node16', 'nodenext'.",
                         category: Diagnostics.Argument_for_0_option_must_be_Colon_1.category,
                         code: Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
 

src/testRunner/unittests/config/commandLineParsing.ts

@@ -0,0 +1,27 @@
+// @target: es2023, esnext
+
+[0].findLast(0);
+new Int8Array().findLast(0);
+new Uint8Array().findLast(0);
+new Uint8ClampedArray().findLast(0);
+new Int16Array().findLast(0);
+new Uint16Array().findLast(0);
+new Int32Array().findLast(0);
+new Uint32Array().findLast(0);
+new Float32Array().findLast(0);
+new Float64Array().findLast(0);
+new BigInt64Array().findLast(0);
+new BigUint64Array().findLast(0);
+
+[0].findLastIndex(0);
+new Int8Array().findLastIndex(0);
+new Uint8Array().findLastIndex(0);
+new Uint8ClampedArray().findLastIndex(0);
+new Int16Array().findLastIndex(0);
+new Uint16Array().findLastIndex(0);
+new Int32Array().findLastIndex(0);
+new Uint32Array().findLastIndex(0);
+new Float32Array().findLastIndex(0);
+new Float64Array().findLastIndex(0);
+new BigInt64Array().findLastIndex(0);
+new BigUint64Array().findLastIndex(0);