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Update return types of APIs (#15887)

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* Update types.ts

* Update types in parser.ts and scanner.ts
This commit is contained in:
Klaus Meinhardt 2017-05-16 23:13:58 +02:00 committed by Mohamed Hegazy
parent 8ceaa33943
commit 5fb77a0901
3 changed files with 26 additions and 25 deletions
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8
src/compiler/parser.ts
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@ -23,19 +23,19 @@ namespace ts {
}
}
function visitNode<T>(cbNode: (node: Node) => T, node: Node): T {
function visitNode<T>(cbNode: (node: Node) => T, node: Node): T | undefined {
if (node) {
return cbNode(node);
}
}
function visitNodeArray<T>(cbNodes: (nodes: Node[]) => T, nodes: Node[]) {
function visitNodeArray<T>(cbNodes: (nodes: Node[]) => T, nodes: Node[]): T | undefined {
if (nodes) {
return cbNodes(nodes);
}
}
function visitEachNode<T>(cbNode: (node: Node) => T, nodes: Node[]) {
function visitEachNode<T>(cbNode: (node: Node) => T, nodes: Node[]): T | undefined {
if (nodes) {
for (const node of nodes) {
const result = cbNode(node);
@ -50,7 +50,7 @@ namespace ts {
// stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
// embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
// a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
export function forEachChild<T>(node: Node, cbNode: (node: Node) => T, cbNodeArray?: (nodes: Node[]) => T): T {
export function forEachChild<T>(node: Node, cbNode: (node: Node) => T, cbNodeArray?: (nodes: Node[]) => T): T | undefined {
if (!node) {
return;
}

13
src/compiler/scanner.ts
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@ -712,11 +712,11 @@ namespace ts {
return accumulator;
}
export function forEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state?: T) {
export function forEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state?: T): U | undefined {
return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ false, cb, state);
}
export function forEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state?: T) {
export function forEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state?: T): U | undefined {
return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ true, cb, state);
}
@ -746,10 +746,11 @@ namespace ts {
}
/** Optionally, get the shebang */
export function getShebang(text: string): string {
return shebangTriviaRegex.test(text)
? shebangTriviaRegex.exec(text)[0]
: undefined;
export function getShebang(text: string): string | undefined {
const match = shebangTriviaRegex.exec(text);
if (match) {
return match[0];
}
}
export function isIdentifierStart(ch: number, languageVersion: ScriptTarget): boolean {

30
src/compiler/types.ts
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@ -2527,11 +2527,11 @@ namespace ts {
indexInfoToIndexSignatureDeclaration(indexInfo: IndexInfo, kind: IndexKind, enclosingDeclaration?: Node, flags?: NodeBuilderFlags): IndexSignatureDeclaration;
getSymbolsInScope(location: Node, meaning: SymbolFlags): Symbol[];
getSymbolAtLocation(node: Node): Symbol;
getSymbolAtLocation(node: Node): Symbol | undefined;
getSymbolsOfParameterPropertyDeclaration(parameter: ParameterDeclaration, parameterName: string): Symbol[];
getShorthandAssignmentValueSymbol(location: Node): Symbol;
getExportSpecifierLocalTargetSymbol(location: ExportSpecifier): Symbol;
getPropertySymbolOfDestructuringAssignment(location: Identifier): Symbol;
getShorthandAssignmentValueSymbol(location: Node): Symbol | undefined;
getExportSpecifierLocalTargetSymbol(location: ExportSpecifier): Symbol | undefined;
getPropertySymbolOfDestructuringAssignment(location: Identifier): Symbol | undefined;
getTypeAtLocation(node: Node): Type;
getTypeFromTypeNode(node: TypeNode): Type;
signatureToString(signature: Signature, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): string;
@ -2542,15 +2542,15 @@ namespace ts {
getAugmentedPropertiesOfType(type: Type): Symbol[];
getRootSymbols(symbol: Symbol): Symbol[];
getContextualType(node: Expression): Type | undefined;
getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature;
getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature;
isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature | undefined;
getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature | undefined;
isImplementationOfOverload(node: FunctionLikeDeclaration): boolean | undefined;
isUndefinedSymbol(symbol: Symbol): boolean;
isArgumentsSymbol(symbol: Symbol): boolean;
isUnknownSymbol(symbol: Symbol): boolean;
/* @internal */ getMergedSymbol(symbol: Symbol): Symbol;
getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number | undefined;
isValidPropertyAccess(node: PropertyAccessExpression | QualifiedName, propertyName: string): boolean;
/** Follow all aliases to get the original symbol. */
getAliasedSymbol(symbol: Symbol): Symbol;
@ -2560,7 +2560,7 @@ namespace ts {
/** Unlike `getExportsOfModule`, this includes properties of an `export =` value. */
/* @internal */ getExportsAndPropertiesOfModule(moduleSymbol: Symbol): Symbol[];
getAllAttributesTypeFromJsxOpeningLikeElement(elementNode: JsxOpeningLikeElement): Type;
getAllAttributesTypeFromJsxOpeningLikeElement(elementNode: JsxOpeningLikeElement): Type | undefined;
getJsxIntrinsicTagNames(): Symbol[];
isOptionalParameter(node: ParameterDeclaration): boolean;
getAmbientModules(): Symbol[];
@ -2568,10 +2568,10 @@ namespace ts {
tryGetMemberInModuleExports(memberName: string, moduleSymbol: Symbol): Symbol | undefined;
getApparentType(type: Type): Type;
getSuggestionForNonexistentProperty(node: Identifier, containingType: Type): string | undefined;
getSuggestionForNonexistentSymbol(location: Node, name: string, meaning: SymbolFlags): string;
/* @internal */ getBaseConstraintOfType(type: Type): Type;
getSuggestionForNonexistentSymbol(location: Node, name: string, meaning: SymbolFlags): string | undefined;
/* @internal */ getBaseConstraintOfType(type: Type): Type | undefined;
/* @internal */ tryFindAmbientModuleWithoutAugmentations(moduleName: string): Symbol;
/* @internal */ tryFindAmbientModuleWithoutAugmentations(moduleName: string): Symbol | undefined;
// Should not be called directly. Should only be accessed through the Program instance.
/* @internal */ getDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
@ -2753,7 +2753,7 @@ namespace ts {
getNodeCheckFlags(node: Node): NodeCheckFlags;
isDeclarationVisible(node: Declaration): boolean;
collectLinkedAliases(node: Identifier): Node[];
isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
isImplementationOfOverload(node: FunctionLikeDeclaration): boolean | undefined;
isRequiredInitializedParameter(node: ParameterDeclaration): boolean;
writeTypeOfDeclaration(declaration: AccessorDeclaration | VariableLikeDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
writeReturnTypeOfSignatureDeclaration(signatureDeclaration: SignatureDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
@ -3135,7 +3135,7 @@ namespace ts {
*/
export interface TypeReference extends ObjectType {
target: GenericType; // Type reference target
typeArguments: Type[]; // Type reference type arguments (undefined if none)
typeArguments?: Type[]; // Type reference type arguments (undefined if none)
}
// Generic class and interface types
@ -3265,7 +3265,7 @@ namespace ts {
export interface Signature {
declaration: SignatureDeclaration; // Originating declaration
typeParameters: TypeParameter[]; // Type parameters (undefined if non-generic)
typeParameters?: TypeParameter[]; // Type parameters (undefined if non-generic)
parameters: Symbol[]; // Parameters
/* @internal */
thisParameter?: Symbol; // symbol of this-type parameter