Merge branch 'master' into fix11295

Author: rbuckton

.gitignore

@@ -41,6 +41,7 @@ tests/cases/**/*.js.map
 scripts/debug.bat
 scripts/run.bat
 scripts/word2md.js
+scripts/buildProtocol.js
 scripts/ior.js
 scripts/buildProtocol.js
 scripts/*.js.map

Jakefile.js

@@ -70,13 +70,14 @@ var compilerSources = [
     "visitor.ts",
     "transformers/destructuring.ts",
     "transformers/ts.ts",
-    "transformers/module/es6.ts",
+    "transformers/module/es2015.ts",
     "transformers/module/system.ts",
     "transformers/module/module.ts",
     "transformers/jsx.ts",
-    "transformers/es7.ts",
+    "transformers/es2017.ts",
+    "transformers/es2016.ts",
+    "transformers/es2015.ts",
     "transformers/generators.ts",
-    "transformers/es6.ts",
     "transformer.ts",
     "sourcemap.ts",
     "comments.ts",
@@ -104,13 +105,14 @@ var servicesSources = [
     "visitor.ts",
     "transformers/destructuring.ts",
     "transformers/ts.ts",
-    "transformers/module/es6.ts",
+    "transformers/module/es2015.ts",
     "transformers/module/system.ts",
     "transformers/module/module.ts",
     "transformers/jsx.ts",
-    "transformers/es7.ts",
+    "transformers/es2017.ts",
+    "transformers/es2016.ts",
+    "transformers/es2015.ts",
     "transformers/generators.ts",
-    "transformers/es6.ts",
     "transformer.ts",
     "sourcemap.ts",
     "comments.ts",

scripts/buildProtocol.ts

@@ -42,7 +42,14 @@ class DeclarationsWalker {
                     return;
                 }
                 // splice declaration in final d.ts file
-                const text = decl.getFullText();
+                let text = decl.getFullText();
+                if (decl.kind === ts.SyntaxKind.EnumDeclaration && !(decl.flags & ts.NodeFlags.Const)) {
+                    // patch enum declaration to make them constan
+                    const declStart = decl.getStart() - decl.getFullStart();
+                    const prefix = text.substring(0, declStart);
+                    const suffix = text.substring(declStart + "enum".length, decl.getEnd() - decl.getFullStart());
+                    text = prefix + "const enum" + suffix;
+                }
                 this.text += `${text}\n`;
 
                 // recursively pull all dependencies into result dts file

src/compiler/binder.ts

@@ -101,7 +101,7 @@ namespace ts {
                 "amd": ModuleKind.AMD,
                 "system": ModuleKind.System,
                 "umd": ModuleKind.UMD,
-                "es6": ModuleKind.ES6,
+                "es6": ModuleKind.ES2015,
                 "es2015": ModuleKind.ES2015,
             }),
             description: Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
@@ -261,8 +261,10 @@ namespace ts {
             type: createMap({
                 "es3": ScriptTarget.ES3,
                 "es5": ScriptTarget.ES5,
-                "es6": ScriptTarget.ES6,
+                "es6": ScriptTarget.ES2015,
                 "es2015": ScriptTarget.ES2015,
+                "es2016": ScriptTarget.ES2016,
+                "es2017": ScriptTarget.ES2017,
             }),
             description: Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015,
             paramType: Diagnostics.VERSION,

src/compiler/binder.ts.orig

@@ -268,13 +268,33 @@ namespace ts {
         if (array) {
             result = [];
             for (let i = 0; i < array.length; i++) {
-                const v = array[i];
-                result.push(f(v, i));
+                result.push(f(array[i], i));
             }
         }
         return result;
     }
 
+    // Maps from T to T and avoids allocation if all elements map to themselves
+    export function sameMap<T>(array: T[], f: (x: T, i: number) => T): T[] {
+        let result: T[];
+        if (array) {
+            for (let i = 0; i < array.length; i++) {
+                if (result) {
+                    result.push(f(array[i], i));
+                }
+                else {
+                    const item = array[i];
+                    const mapped = f(item, i);
+                    if (item !== mapped) {
+                        result = array.slice(0, i);
+                        result.push(mapped);
+                    }
+                }
+            }
+        }
+        return result || array;
+    }
+
     /**
      * Flattens an array containing a mix of array or non-array elements.
      *
@@ -402,6 +422,17 @@ namespace ts {
         return result;
     }
 
+    export function some<T>(array: T[], predicate?: (value: T) => boolean): boolean {
+        if (array) {
+            for (const v of array) {
+                if (!predicate || predicate(v)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
     export function concatenate<T>(array1: T[], array2: T[]): T[] {
         if (!array2 || !array2.length) return array1;
         if (!array1 || !array1.length) return array2;
@@ -1181,7 +1212,7 @@ namespace ts {
 
     /**
      * Returns the path except for its basename. Eg:
-     * 
+     *
      * /path/to/file.ext -> /path/to
      */
     export function getDirectoryPath(path: Path): Path;
@@ -1207,7 +1238,7 @@ namespace ts {
     export function getEmitModuleKind(compilerOptions: CompilerOptions) {
         return typeof compilerOptions.module === "number" ?
             compilerOptions.module :
-            getEmitScriptTarget(compilerOptions) === ScriptTarget.ES6 ? ModuleKind.ES6 : ModuleKind.CommonJS;
+            getEmitScriptTarget(compilerOptions) >= ScriptTarget.ES2015 ? ModuleKind.ES2015 : ModuleKind.CommonJS;
     }
 
     /* @internal */

src/compiler/checker.ts

@@ -2961,7 +2961,7 @@
         "category": "Error",
         "code": 7033
     },
-    "Variable '{0}' implicitly has type 'any' in some locations where its type cannot be determined.": {
+    "Variable '{0}' implicitly has type '{1}' in some locations where its type cannot be determined.": {
         "category": "Error",
         "code": 7034
     },

src/compiler/commandLineParser.ts

@@ -2182,7 +2182,7 @@ const _super = (function (geti, seti) {
 
             // Only Emit __extends function when target ES5.
             // For target ES6 and above, we can emit classDeclaration as is.
-            if ((languageVersion < ScriptTarget.ES6) && (!extendsEmitted && node.flags & NodeFlags.HasClassExtends)) {
+            if ((languageVersion < ScriptTarget.ES2015) && (!extendsEmitted && node.flags & NodeFlags.HasClassExtends)) {
                 writeLines(extendsHelper);
                 extendsEmitted = true;
                 helpersEmitted = true;
@@ -2209,9 +2209,12 @@ const _super = (function (geti, seti) {
                 helpersEmitted = true;
             }
 
-            if (!awaiterEmitted && node.flags & NodeFlags.HasAsyncFunctions) {
+            // Only emit __awaiter function when target ES5/ES6.
+            // Only emit __generator function when target ES5.
+            // For target ES2017 and above, we can emit async/await as is.
+            if ((languageVersion < ScriptTarget.ES2017) && (!awaiterEmitted && node.flags & NodeFlags.HasAsyncFunctions)) {
                 writeLines(awaiterHelper);
-                if (languageVersion < ScriptTarget.ES6) {
+                if (languageVersion < ScriptTarget.ES2015) {
                     writeLines(generatorHelper);
                 }