Remove a bunch of namespace uses

src/compiler/binder.ts

@@ -1,5 +1,3 @@
-import * as ts from "./_namespaces/ts";
-import { performance } from "./_namespaces/ts";
 import { getNodeId } from "./checker";
 import {
     append, appendIfUnique, cast, concatenate, contains, every, forEach, getRangesWhere, isString, length, Pattern,
@@ -19,6 +17,7 @@ import {
 import { createBinaryExpressionTrampoline } from "./factory/utilities";
 import { forEachChild, isExternalModule } from "./parser";
 import { perfLogger } from "./perfLogger";
+import * as performance from "./performance";
 import { tokenToString } from "./scanner";
 import { tracing, TracingNode } from "./tracing";
 import {
@@ -471,7 +470,7 @@ function createBinder(): (file: SourceFile, options: CompilerOptions) => void {
             case SyntaxKind.Parameter:
                 // Parameters with names are handled at the top of this function.  Parameters
                 // without names can only come from JSDocFunctionTypes.
-                Debug.assert(node.parent.kind === SyntaxKind.JSDocFunctionType, "Impossible parameter parent kind", () => `parent is: ${(ts as any).SyntaxKind ? (ts as any).SyntaxKind[node.parent.kind] : node.parent.kind}, expected JSDocFunctionType`);
+                Debug.assert(node.parent.kind === SyntaxKind.JSDocFunctionType, "Impossible parameter parent kind", () => `parent is: ${Debug.formatSyntaxKind(node.parent.kind)}, expected JSDocFunctionType`);
                 const functionType = node.parent as JSDocFunctionType;
                 const index = functionType.parameters.indexOf(node as ParameterDeclaration);
                 return "arg" + index as __String;

src/compiler/builder.ts

@@ -1,4 +1,3 @@
-import * as ts from "./_namespaces/ts";
 import {
     AffectedFileResult, BuilderProgram, BuilderProgramHost, EmitAndSemanticDiagnosticsBuilderProgram,
     SemanticDiagnosticsBuilderProgram,
@@ -16,6 +15,7 @@ import { getTsBuildInfoEmitOutputFilePath } from "./emitter";
 import { isDeclarationFileName } from "./parser";
 import {
     ensurePathIsNonModuleName, getDirectoryPath, getNormalizedAbsolutePath, getRelativePathFromDirectory,
+    toPath as toPathInternal,
 } from "./path";
 import { createProgram, emitSkippedWithNoDiagnostics, filterSemanticDiagnostics, handleNoEmitOptions } from "./program";
 import { generateDjb2Hash } from "./sys";
@@ -328,7 +328,7 @@ function convertToDiagnostics(diagnostics: readonly ReusableDiagnostic[], newPro
     });
 
     function toPath(path: string) {
-        return ts.toPath(path, buildInfoDirectory, getCanonicalFileName);
+        return toPathInternal(path, buildInfoDirectory, getCanonicalFileName);
     }
 }
 
@@ -1456,7 +1456,7 @@ export function createBuildProgramUsingProgramBuildInfo(program: ProgramBuildInf
     };
 
     function toPath(path: string) {
-        return ts.toPath(path, buildInfoDirectory, getCanonicalFileName);
+        return toPathInternal(path, buildInfoDirectory, getCanonicalFileName);
     }
 
     function toAbsolutePath(path: string) {

src/compiler/checker.ts

@@ -1,5 +1,3 @@
-import * as ts from "./_namespaces/ts";
-import { moduleSpecifiers, performance } from "./_namespaces/ts";
 import { bindSourceFile, getModuleInstanceState, ModuleInstanceState } from "./binder";
 import {
     addRange, and, append, appendIfUnique, arrayFrom, arrayOf, arraysEqual, arrayToMultiMap, binarySearch,
@@ -49,13 +47,15 @@ import {
 } from "./factory/utilities";
 import { setTextRange } from "./factory/utilitiesPublic";
 import { getTypesPackageName, mangleScopedPackageName } from "./moduleNameResolver";
+import * as moduleSpecifiers from "./moduleSpecifiers";
 import {
     forEachChild, forEachChildRecursively, isExternalModule, parseIsolatedEntityName, parseNodeFactory,
 } from "./parser";
 import {
     comparePaths, fileExtensionIs, fileExtensionIsOneOf, getDirectoryPath, getNormalizedAbsolutePath, hasExtension,
     pathIsRelative,
 } from "./path";
+import * as performance from "./performance";
 import {
     getModeForUsageLocation, getResolutionDiagnostic, getResolutionModeOverrideForClause,
     isExclusivelyTypeOnlyImportOrExport, resolveTripleslashReference,
@@ -211,8 +211,8 @@ import {
     getEffectiveConstraintOfTypeParameter, getEffectiveTypeParameterDeclarations, getJSDocClassTag,
     getJSDocDeprecatedTag, getJSDocEnumTag, getJSDocParameterTags, getJSDocTags, getJSDocThisTag, getJSDocType,
     getJSDocTypeTag, getNameOfDeclaration, getOriginalNode, getParseTreeNode, getTextOfJSDocComment, hasInitializer,
-    hasJSDocNodes, hasJSDocParameterTags, hasOnlyExpressionInitializer, hasRestParameter, hasScopeMarker, idText,
-    isAccessor, isAssertionExpression, isAssignmentPattern, isBindingPattern, isCallChain, isCallLikeExpression,
+    hasJSDocNodes, hasJSDocParameterTags, hasOnlyExpressionInitializer, hasRestParameter, hasScopeMarker, hasType,
+    idText, isAccessor, isAssertionExpression, isAssignmentPattern, isBindingPattern, isCallChain, isCallLikeExpression,
     isCallOrNewExpression, isClassElement, isClassLike, isConstTypeReference, isDeclaration, isEntityName, isExpression,
     isExpressionOfOptionalChainRoot, isExternalModuleIndicator, isExternalModuleNameRelative, isForInOrOfStatement,
     isFunctionLike, isFunctionLikeDeclaration, isFunctionLikeOrClassStaticBlockDeclaration, isFunctionOrModuleBlock,
@@ -965,6 +965,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
         isPropertyAccessible,
         getTypeOnlyAliasDeclaration,
         getMemberOverrideModifierStatus,
+        typeHasCallOrConstructSignatures,
     };
 
     function runWithInferenceBlockedFromSourceNode<T>(node: Node | undefined, fn: () => T): T {
@@ -8816,7 +8817,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
 
     function findResolutionCycleStartIndex(target: TypeSystemEntity, propertyName: TypeSystemPropertyName): number {
         for (let i = resolutionTargets.length - 1; i >= 0; i--) {
-            if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
+            if (resolutionTargetHasType(resolutionTargets[i], resolutionPropertyNames[i])) {
                 return -1;
             }
             if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
@@ -8826,7 +8827,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
         return -1;
     }
 
-    function hasType(target: TypeSystemEntity, propertyName: TypeSystemPropertyName): boolean {
+    function resolutionTargetHasType(target: TypeSystemEntity, propertyName: TypeSystemPropertyName): boolean {
         switch (propertyName) {
             case TypeSystemPropertyName.Type:
                 return !!getSymbolLinks(target as Symbol).type;
@@ -17750,7 +17751,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
             return false;
         }
         // Or functions with annotated parameter types
-        if (some(node.parameters, ts.hasType)) {
+        if (some(node.parameters, hasType)) {
             return false;
         }
         const sourceSig = getSingleCallSignature(source);
@@ -42642,7 +42643,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
     }
 
     function typeHasCallOrConstructSignatures(type: Type): boolean {
-        return ts.typeHasCallOrConstructSignatures(type, checker);
+        return getSignaturesOfType(type, SignatureKind.Call).length !== 0 || getSignaturesOfType(type, SignatureKind.Construct).length !== 0;
     }
 
     function getRootSymbols(symbol: Symbol): readonly Symbol[] {

src/compiler/emitter.ts

@@ -1,13 +1,11 @@
-import * as ts from "./_namespaces/ts";
-import { performance } from "./_namespaces/ts";
 import { OutputFile } from "./builderStatePublic";
 import { getNodeId } from "./checker";
 import {
     arrayToMap, cast, clone, contains, createGetCanonicalFileName, createMultiMap, emptyArray, filter, findIndex,
     forEach, GetCanonicalFileName, isArray, last, lastOrUndefined, length, memoize, notImplemented, returnFalse,
     returnUndefined, singleOrUndefined, some, stableSort, stringContains,
 } from "./core";
-import { Comparison, Map, Set } from "./corePublic";
+import { Comparison, Map, Set, version } from "./corePublic";
 import { Debug } from "./debug";
 import { compareEmitHelpers } from "./factory/emitHelpers";
 import {
@@ -32,6 +30,7 @@ import {
     getRelativePathFromDirectory, getRelativePathToDirectoryOrUrl, getRootLength, normalizePath, normalizeSlashes,
     resolvePath,
 } from "./path";
+import * as performance from "./performance";
 import { computeCommonSourceDirectoryOfFilenames, createPrependNodes } from "./program";
 import {
     computeLineStarts, forEachLeadingCommentRange, forEachTrailingCommentRange, getLeadingCommentRanges,
@@ -93,12 +92,12 @@ import {
     getLinesBetweenRangeEndAndRangeStart, getLiteralText, GetLiteralTextFlags, getNewLineCharacter,
     getOwnEmitOutputFilePath, getSourceFileOfNode, getSourceFilePathInNewDir, getSourceFilesToEmit,
     getSourceTextOfNodeFromSourceFile, getTrailingSemicolonDeferringWriter, isAccessExpression, isBundleFileTextLike,
-    isIncrementalCompilation, isInJsonFile, isJsonSourceFile, isKeyword, isLet, isNodeDescendantOf, isPinnedComment,
-    isPrologueDirective, isRecognizedTripleSlashComment, isSourceFileNotJson, isVarConst, makeIdentifierFromModuleName,
-    nodeIsSynthesized, outFile, positionIsSynthesized, positionsAreOnSameLine, rangeEndIsOnSameLineAsRangeStart,
-    rangeEndPositionsAreOnSameLine, rangeIsOnSingleLine, rangeStartPositionsAreOnSameLine, removeFileExtension,
-    setEachParent, setParent, setTextRangePosEnd, setTextRangePosWidth, supportedJSExtensionsFlat, writeCommentRange,
-    writeFile,
+    isFileLevelUniqueName as isFileLevelUniqueNameInternal, isIncrementalCompilation, isInJsonFile, isJsonSourceFile,
+    isKeyword, isLet, isNodeDescendantOf, isPinnedComment, isPrologueDirective, isRecognizedTripleSlashComment,
+    isSourceFileNotJson, isVarConst, makeIdentifierFromModuleName, nodeIsSynthesized, outFile, positionIsSynthesized,
+    positionsAreOnSameLine, rangeEndIsOnSameLineAsRangeStart, rangeEndPositionsAreOnSameLine, rangeIsOnSingleLine,
+    rangeStartPositionsAreOnSameLine, removeFileExtension, setEachParent, setParent, setTextRangePosEnd,
+    setTextRangePosWidth, supportedJSExtensionsFlat, writeCommentRange, writeFile,
 } from "./utilities";
 import {
     escapeLeadingUnderscores, getOriginalNode, getParseTreeNode, getTextOfJSDocComment, guessIndentation, idText,
@@ -472,7 +471,6 @@ export function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFi
             emitSkipped = true;
             return;
         }
-        const version = ts.version; // Extracted into a const so the form is stable between namespace and module
         writeFile(host, emitterDiagnostics, buildInfoPath, getBuildInfoText({ bundle, program, version }), /*writeByteOrderMark*/ false);
     }
 
@@ -5210,7 +5208,7 @@ export function createPrinter(printerOptions: PrinterOptions = {}, handlers: Pri
      * Returns a value indicating whether a name is unique globally or within the current file.
      */
     function isFileLevelUniqueName(name: string) {
-        return currentSourceFile ? ts.isFileLevelUniqueName(currentSourceFile, name, hasGlobalName) : true;
+        return currentSourceFile ? isFileLevelUniqueNameInternal(currentSourceFile, name, hasGlobalName) : true;
     }
 
     /**

src/compiler/parser.ts

@@ -1,5 +1,3 @@
-import * as ts from "./_namespaces/ts";
-import { performance } from "./_namespaces/ts";
 import { convertToObjectWorker } from "./commandLineParser";
 import {
     addRange, append, AssertionLevel, concatenate, emptyArray, emptyMap, findIndex, forEach, getSpellingSuggestion,
@@ -12,13 +10,15 @@ import { BaseNodeFactory } from "./factory/baseNodeFactory";
 import { createNodeFactory, NodeFactoryFlags } from "./factory/nodeFactory";
 import {
     isAsyncModifier, isExportAssignment, isExportDeclaration, isExportModifier, isExternalModuleReference,
-    isFunctionTypeNode, isImportDeclaration, isImportEqualsDeclaration, isJSDocFunctionType, isJSDocNullableType,
-    isJSDocReturnTag, isJSDocTypeTag, isJsxOpeningElement, isJsxOpeningFragment, isMetaProperty, isNonNullExpression,
-    isPrivateIdentifier, isTaggedTemplateExpression, isTypeReferenceNode,
+    isFunctionTypeNode, isIdentifier as isIdentifierNode, isImportDeclaration, isImportEqualsDeclaration,
+    isJSDocFunctionType, isJSDocNullableType, isJSDocReturnTag, isJSDocTypeTag, isJsxOpeningElement,
+    isJsxOpeningFragment, isMetaProperty, isNonNullExpression, isPrivateIdentifier, isTaggedTemplateExpression,
+    isTypeReferenceNode,
 } from "./factory/nodeTests";
 import { setTextRange } from "./factory/utilitiesPublic";
 import { fileExtensionIsOneOf, normalizePath } from "./path";
 import { perfLogger } from "./perfLogger";
+import * as performance from "./performance";
 import {
     createScanner, getLeadingCommentRanges, isIdentifierText, skipTrivia, textToKeywordObj, tokenIsIdentifierOrKeyword,
     tokenIsIdentifierOrKeywordOrGreaterThan, tokenToString,
@@ -1757,7 +1757,7 @@ namespace Parser {
         }
 
         // Otherwise, if this isn't a well-known keyword-like identifier, give the generic fallback message.
-        const expressionText = ts.isIdentifier(node) ? idText(node) : undefined;
+        const expressionText = isIdentifierNode(node) ? idText(node) : undefined;
         if (!expressionText || !isIdentifierText(expressionText, languageVersion)) {
             parseErrorAtCurrentToken(Diagnostics._0_expected, tokenToString(SyntaxKind.SemicolonToken));
             return;
@@ -6335,7 +6335,7 @@ namespace Parser {
         let node: ExpressionStatement | LabeledStatement;
         const hasParen = token() === SyntaxKind.OpenParenToken;
         const expression = allowInAnd(parseExpression);
-        if (ts.isIdentifier(expression) && parseOptional(SyntaxKind.ColonToken)) {
+        if (isIdentifierNode(expression) && parseOptional(SyntaxKind.ColonToken)) {
             node = factory.createLabeledStatement(expression, parseStatement());
         }
         else {
@@ -8393,7 +8393,7 @@ namespace Parser {
                     case SyntaxKind.ArrayType:
                         return isObjectOrObjectArrayTypeReference((node as ArrayTypeNode).elementType);
                     default:
-                        return isTypeReferenceNode(node) && ts.isIdentifier(node.typeName) && node.typeName.escapedText === "Object" && !node.typeArguments;
+                        return isTypeReferenceNode(node) && isIdentifierNode(node.typeName) && node.typeName.escapedText === "Object" && !node.typeArguments;
                 }
             }
 
@@ -8664,8 +8664,8 @@ namespace Parser {
             }
 
             function escapedTextsEqual(a: EntityName, b: EntityName): boolean {
-                while (!ts.isIdentifier(a) || !ts.isIdentifier(b)) {
-                    if (!ts.isIdentifier(a) && !ts.isIdentifier(b) && a.right.escapedText === b.right.escapedText) {
+                while (!isIdentifierNode(a) || !isIdentifierNode(b)) {
+                    if (!isIdentifierNode(a) && !isIdentifierNode(b) && a.right.escapedText === b.right.escapedText) {
                         a = a.left;
                         b = b.left;
                     }
@@ -8690,7 +8690,7 @@ namespace Parser {
                                 const child = tryParseChildTag(target, indent);
                                 if (child && (child.kind === SyntaxKind.JSDocParameterTag || child.kind === SyntaxKind.JSDocPropertyTag) &&
                                     target !== PropertyLikeParse.CallbackParameter &&
-                                    name && (ts.isIdentifier(child.name) || !escapedTextsEqual(name, child.name.left))) {
+                                    name && (isIdentifierNode(child.name) || !escapedTextsEqual(name, child.name.left))) {
                                     return false;
                                 }
                                 return child;

src/compiler/program.ts

@@ -1,5 +1,4 @@
 import * as ts from "./_namespaces/ts";
-import { performance } from "./_namespaces/ts";
 import { BuilderProgram } from "./builderPublic";
 import { createTypeChecker } from "./checker";
 import {
@@ -42,8 +41,9 @@ import {
     ensureTrailingDirectorySeparator, fileExtensionIs, fileExtensionIsOneOf, forEachAncestorDirectory, getBaseFileName,
     getDirectoryPath, getNormalizedAbsolutePath, getNormalizedAbsolutePathWithoutRoot, getNormalizedPathComponents,
     getPathFromPathComponents, getRootLength, hasExtension, isRootedDiskPath, normalizePath, pathIsAbsolute,
-    pathIsRelative,
+    pathIsRelative, toPath as toPathInternal,
 } from "./path";
+import * as performance from "./performance";
 import {
     computeLineAndCharacterOfPosition, getLineAndCharacterOfPosition, getLineStarts, getPositionOfLineAndCharacter,
     isIdentifierText, skipTrivia, tokenToString,
@@ -1570,7 +1570,7 @@ export function createProgram(rootNamesOrOptions: readonly string[] | CreateProg
     }
 
     function toPath(fileName: string): Path {
-        return ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+        return toPathInternal(fileName, currentDirectory, getCanonicalFileName);
     }
 
     function getCommonSourceDirectory() {