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Merge pull request #32178 from microsoft/improveTupleDestructuring

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Simplify tuple destructuring logic
This commit is contained in:
Anders Hejlsberg
2019-07-02 17:25:12 -07:00
committed by GitHub
parent 440ed83f29 17153a6e5f
commit 340f81035f
37 changed files with 727 additions and 164 deletions
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src/compiler/checker.ts
+39 -32
View File
@@ -723,6 +723,7 @@ namespace ts {
NoIndexSignatures = 1 << 0,
Writing = 1 << 1,
CacheSymbol = 1 << 2,
NoTupleBoundsCheck = 1 << 3,
}
const enum CallbackCheck {
@@ -5119,21 +5120,25 @@ namespace ts {
}
else if (isArrayLikeType(parentType)) {
const indexType = getLiteralType(index);
const declaredType = getConstraintForLocation(getIndexedAccessType(parentType, indexType, declaration.name), declaration.name);
const accessFlags = hasDefaultValue(declaration) ? AccessFlags.NoTupleBoundsCheck : 0;
const declaredType = getConstraintForLocation(getIndexedAccessTypeOrUndefined(parentType, indexType, declaration.name, accessFlags) || errorType, declaration.name);
type = getFlowTypeOfDestructuring(declaration, declaredType);
}
else {
type = elementType;
}
}
// In strict null checking mode, if a default value of a non-undefined type is specified, remove
// undefined from the final type.
if (strictNullChecks && declaration.initializer && !(getFalsyFlags(checkDeclarationInitializer(declaration)) & TypeFlags.Undefined)) {
type = getTypeWithFacts(type, TypeFacts.NEUndefined);
if (!declaration.initializer) {
return type;
}
return declaration.initializer && !getEffectiveTypeAnnotationNode(walkUpBindingElementsAndPatterns(declaration)) ?
getUnionType([type, checkDeclarationInitializer(declaration)], UnionReduction.Subtype) :
type;
if (getEffectiveTypeAnnotationNode(walkUpBindingElementsAndPatterns(declaration))) {
// In strict null checking mode, if a default value of a non-undefined type is specified, remove
// undefined from the final type.
return strictNullChecks && !(getFalsyFlags(checkDeclarationInitializer(declaration)) & TypeFlags.Undefined) ?
getTypeWithFacts(type, TypeFacts.NEUndefined) :
type;
}
return getUnionType([getTypeWithFacts(type, TypeFacts.NEUndefined), checkDeclarationInitializer(declaration)], UnionReduction.Subtype);
}
function getTypeForDeclarationFromJSDocComment(declaration: Node) {
@@ -10144,7 +10149,7 @@ namespace ts {
propType;
}
if (everyType(objectType, isTupleType) && isNumericLiteralName(propName) && +propName >= 0) {
if (accessNode && everyType(objectType, t => !(<TupleTypeReference>t).target.hasRestElement)) {
if (accessNode && everyType(objectType, t => !(<TupleTypeReference>t).target.hasRestElement) && !(accessFlags & AccessFlags.NoTupleBoundsCheck)) {
const indexNode = getIndexNodeForAccessExpression(accessNode);
if (isTupleType(objectType)) {
error(indexNode, Diagnostics.Tuple_type_0_of_length_1_has_no_element_at_index_2,
@@ -19218,26 +19223,7 @@ namespace ts {
function getArrayLiteralTupleTypeIfApplicable(elementTypes: Type[], contextualType: Type | undefined, hasRestElement: boolean, elementCount = elementTypes.length, readonly = false) {
// Infer a tuple type when the contextual type is or contains a tuple-like type
if (readonly || (contextualType && forEachType(contextualType, isTupleLikeType))) {
const minLength = elementCount - (hasRestElement ? 1 : 0);
const pattern = contextualType && contextualType.pattern;
// If array literal is contextually typed by a binding pattern or an assignment pattern, pad the resulting
// tuple type with the corresponding binding or assignment element types to make the lengths equal.
if (!hasRestElement && pattern && (pattern.kind === SyntaxKind.ArrayBindingPattern || pattern.kind === SyntaxKind.ArrayLiteralExpression)) {
const patternElements = (<BindingPattern | ArrayLiteralExpression>pattern).elements;
for (let i = elementCount; i < patternElements.length; i++) {
const e = patternElements[i];
if (hasDefaultValue(e)) {
elementTypes.push((<TypeReference>contextualType).typeArguments![i]);
}
else if (i < patternElements.length - 1 || !(e.kind === SyntaxKind.BindingElement && (<BindingElement>e).dotDotDotToken || e.kind === SyntaxKind.SpreadElement)) {
if (e.kind !== SyntaxKind.OmittedExpression) {
error(e, Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
}
elementTypes.push(strictNullChecks ? implicitNeverType : undefinedWideningType);
}
}
}
return createTupleType(elementTypes, minLength, hasRestElement, readonly);
return createTupleType(elementTypes, elementCount - (hasRestElement ? 1 : 0), hasRestElement, readonly);
}
}
@@ -23766,8 +23752,10 @@ namespace ts {
if (isArrayLikeType(sourceType)) {
// We create a synthetic expression so that getIndexedAccessType doesn't get confused
// when the element is a SyntaxKind.ElementAccessExpression.
const elementType = getIndexedAccessType(sourceType, indexType, createSyntheticExpression(element, indexType));
const type = getFlowTypeOfDestructuring(element, elementType);
const accessFlags = hasDefaultValue(element) ? AccessFlags.NoTupleBoundsCheck : 0;
const elementType = getIndexedAccessTypeOrUndefined(sourceType, indexType, createSyntheticExpression(element, indexType), accessFlags) || errorType;
const assignedType = hasDefaultValue(element) ? getTypeWithFacts(elementType, TypeFacts.NEUndefined) : elementType;
const type = getFlowTypeOfDestructuring(element, assignedType);
return checkDestructuringAssignment(element, type, checkMode);
}
return checkDestructuringAssignment(element, elementType, checkMode);
@@ -24356,10 +24344,13 @@ namespace ts {
function checkDeclarationInitializer(declaration: HasExpressionInitializer) {
const initializer = getEffectiveInitializer(declaration)!;
const type = getTypeOfExpression(initializer, /*cache*/ true);
const padded = isParameter(declaration) && declaration.name.kind === SyntaxKind.ArrayBindingPattern &&
isTupleType(type) && !type.target.hasRestElement && getTypeReferenceArity(type) < declaration.name.elements.length ?
padTupleType(type, declaration.name) : type;
const widened = getCombinedNodeFlags(declaration) & NodeFlags.Const ||
isDeclarationReadonly(declaration) ||
isTypeAssertion(initializer) ||
isLiteralOfContextualType(type, getContextualType(initializer)) ? type : getWidenedLiteralType(type);
isLiteralOfContextualType(padded, getContextualType(initializer)) ? padded : getWidenedLiteralType(padded);
if (isInJSFile(declaration)) {
if (widened.flags & TypeFlags.Nullable) {
reportImplicitAny(declaration, anyType);
@@ -24373,6 +24364,22 @@ namespace ts {
return widened;
}
function padTupleType(type: TupleTypeReference, pattern: ArrayBindingPattern) {
const patternElements = pattern.elements;
const arity = getTypeReferenceArity(type);
const elementTypes = arity ? type.typeArguments!.slice() : [];
for (let i = arity; i < patternElements.length; i++) {
const e = patternElements[i];
if (i < patternElements.length - 1 || !(e.kind === SyntaxKind.BindingElement && e.dotDotDotToken)) {
elementTypes.push(!isOmittedExpression(e) && hasDefaultValue(e) ? getTypeFromBindingElement(e, /*includePatternInType*/ false, /*reportErrors*/ false) : anyType);
if (!isOmittedExpression(e) && !hasDefaultValue(e)) {
reportImplicitAny(e, anyType);
}
}
}
return createTupleType(elementTypes, type.target.minLength, /*hasRestElement*/ false, type.target.readonly);
}
function isLiteralOfContextualType(candidateType: Type, contextualType: Type | undefined): boolean {
if (contextualType) {
if (contextualType.flags & TypeFlags.UnionOrIntersection) {
tests/baselines/reference/declarationEmitDestructuringArrayPattern2.errors.txt
+6 -6
View File
@@ -1,6 +1,6 @@
tests/cases/compiler/declarationEmitDestructuringArrayPattern2.ts(4,6): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/compiler/declarationEmitDestructuringArrayPattern2.ts(4,11): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/compiler/declarationEmitDestructuringArrayPattern2.ts(4,16): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/compiler/declarationEmitDestructuringArrayPattern2.ts(4,6): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
tests/cases/compiler/declarationEmitDestructuringArrayPattern2.ts(4,11): error TS2493: Tuple type '[]' of length '0' has no element at index '1'.
tests/cases/compiler/declarationEmitDestructuringArrayPattern2.ts(4,16): error TS2493: Tuple type '[]' of length '0' has no element at index '2'.
==== tests/cases/compiler/declarationEmitDestructuringArrayPattern2.ts (3 errors) ====
@@ -9,11 +9,11 @@ tests/cases/compiler/declarationEmitDestructuringArrayPattern2.ts(4,16): error T
var [x11 = 0, y11 = ""] = [1, "hello"];
var [a11, b11, c11] = [];
~~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
~~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '1'.
~~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '2'.
var [a2, [b2, { x12, y12: c2 }]=["abc", { x12: 10, y12: false }]] = [1, ["hello", { x12: 5, y12: true }]];
tests/baselines/reference/declarationEmitDestructuringArrayPattern2.js
+1 -1
View File
@@ -22,7 +22,7 @@ var _m = [[x13, y13], { x: x13, y: y13 }], a3 = _m[0], b3 = _m[1];
//// [declarationEmitDestructuringArrayPattern2.d.ts]
declare var x10: number, y10: string, z10: boolean;
declare var x11: number, y11: string;
declare var a11: any, b11: any, c11: any;
declare var a11: undefined, b11: undefined, c11: undefined;
declare var a2: number, b2: string, x12: number, c2: boolean;
declare var x13: number, y13: string;
declare var a3: (string | number)[], b3: {
tests/baselines/reference/declarationEmitDestructuringArrayPattern2.types
+4 -4
View File
@@ -20,10 +20,10 @@ var [x11 = 0, y11 = ""] = [1, "hello"];
>"hello" : "hello"
var [a11, b11, c11] = [];
>a11 : any
>b11 : any
>c11 : any
>[] : [undefined?, undefined?, undefined?]
>a11 : undefined
>b11 : undefined
>c11 : undefined
>[] : []
var [a2, [b2, { x12, y12: c2 }]=["abc", { x12: 10, y12: false }]] = [1, ["hello", { x12: 5, y12: true }]];
>a2 : number
tests/baselines/reference/declarationsAndAssignments.errors.txt
+12 -12
View File
@@ -1,4 +1,4 @@
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(5,16): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(5,16): error TS2493: Tuple type '[number, string]' of length '2' has no element at index '2'.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(22,17): error TS2353: Object literal may only specify known properties, and 'x' does not exist in type '{}'.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(22,23): error TS2353: Object literal may only specify known properties, and 'y' does not exist in type '{}'.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(23,25): error TS2353: Object literal may only specify known properties, and 'y' does not exist in type '{ x: any; }'.
@@ -6,11 +6,11 @@ tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(24,19):
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(28,28): error TS2353: Object literal may only specify known properties, and 'y' does not exist in type '{ x: any; }'.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(29,22): error TS2353: Object literal may only specify known properties, and 'x' does not exist in type '{ y: any; }'.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(58,9): error TS2403: Subsequent variable declarations must have the same type. Variable 'y' must be of type 'string | number', but here has type 'string'.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(62,10): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(62,13): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(62,16): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(63,13): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(63,16): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(62,10): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(62,13): error TS2493: Tuple type '[]' of length '0' has no element at index '1'.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(62,16): error TS2493: Tuple type '[]' of length '0' has no element at index '2'.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(63,13): error TS2493: Tuple type '[number]' of length '1' has no element at index '1'.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(63,16): error TS2493: Tuple type '[number]' of length '1' has no element at index '2'.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(67,9): error TS2461: Type '{}' is not an array type.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(68,9): error TS2461: Type '{ 0: number; 1: number; }' is not an array type.
tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(73,11): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
@@ -29,7 +29,7 @@ tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(138,9):
var [x, y] = [1, "hello"];
var [x, y, z] = [1, "hello"];
~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[number, string]' of length '2' has no element at index '2'.
var [,, x] = [0, 1, 2];
var x: number;
var y: string;
@@ -103,16 +103,16 @@ tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(138,9):
function f8() {
var [a, b, c] = []; // Error, [] is an empty tuple
~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '1'.
~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '2'.
var [d, e, f] = [1]; // Error, [1] is a tuple
~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[number]' of length '1' has no element at index '1'.
~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[number]' of length '1' has no element at index '2'.
}
function f9() {
tests/baselines/reference/declarationsAndAssignments.types
+9 -9
View File
@@ -23,8 +23,8 @@ function f0() {
var [x, y, z] = [1, "hello"];
>x : number
>y : string
>z : any
>[1, "hello"] : [number, string, undefined?]
>z : undefined
>[1, "hello"] : [number, string]
>1 : 1
>"hello" : "hello"
@@ -255,16 +255,16 @@ function f8() {
>f8 : () => void
var [a, b, c] = []; // Error, [] is an empty tuple
>a : any
>b : any
>c : any
>[] : [undefined?, undefined?, undefined?]
>a : undefined
>b : undefined
>c : undefined
>[] : []
var [d, e, f] = [1]; // Error, [1] is a tuple
>d : number
>e : any
>f : any
>[1] : [number, undefined?, undefined?]
>e : undefined
>f : undefined
>[1] : [number]
>1 : 1
}
tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5.errors.txt
+6 -6
View File
@@ -1,6 +1,6 @@
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5.ts(43,6): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5.ts(44,8): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5.ts(44,18): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5.ts(43,6): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5.ts(44,8): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5.ts(44,18): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
==== tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5.ts (3 errors) ====
@@ -48,12 +48,12 @@ tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAss
var [c0, c1] = [...temp];
var [c2] = [];
~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
var [[[c3]], [[[[c4]]]]] = [[[]], [[[[]]]]]
~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
var [[c5], c6]: [[string|number], boolean] = [[1], true];
var [, c7] = [1, 2, 3];
var [,,, c8] = [1, 2, 3, 4];
tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5.types
+11 -11
View File
@@ -92,19 +92,19 @@ var [c0, c1] = [...temp];
>temp : number[]
var [c2] = [];
>c2 : any
>[] : [undefined?]
>c2 : undefined
>[] : []
var [[[c3]], [[[[c4]]]]] = [[[]], [[[[]]]]]
>c3 : any
>c4 : any
>[[[]], [[[[]]]]] : [[[undefined?]], [[[[undefined?]]]]]
>[[]] : [[undefined?]]
>[] : [undefined?]
>[[[[]]]] : [[[[undefined?]]]]
>[[[]]] : [[[undefined?]]]
>[[]] : [[undefined?]]
>[] : [undefined?]
>c3 : undefined
>c4 : undefined
>[[[]], [[[[]]]]] : [[[]], [[[[]]]]]
>[[]] : [[]]
>[] : []
>[[[[]]]] : [[[[]]]]
>[[[]]] : [[[]]]
>[[]] : [[]]
>[] : []
var [[c5], c6]: [[string|number], boolean] = [[1], true];
>c5 : string | number
tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5iterable.errors.txt
+6 -6
View File
@@ -1,6 +1,6 @@
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5iterable.ts(43,6): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5iterable.ts(44,8): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5iterable.ts(44,18): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5iterable.ts(43,6): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5iterable.ts(44,8): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5iterable.ts(44,18): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
==== tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5iterable.ts (3 errors) ====
@@ -48,12 +48,12 @@ tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAss
var [c0, c1] = [...temp];
var [c2] = [];
~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
var [[[c3]], [[[[c4]]]]] = [[[]], [[[[]]]]]
~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
var [[c5], c6]: [[string|number], boolean] = [[1], true];
var [, c7] = [1, 2, 3];
var [,,, c8] = [1, 2, 3, 4];
tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5iterable.types
+11 -11
View File
@@ -92,19 +92,19 @@ var [c0, c1] = [...temp];
>temp : number[]
var [c2] = [];
>c2 : any
>[] : [undefined?]
>c2 : undefined
>[] : []
var [[[c3]], [[[[c4]]]]] = [[[]], [[[[]]]]]
>c3 : any
>c4 : any
>[[[]], [[[[]]]]] : [[[undefined?]], [[[[undefined?]]]]]
>[[]] : [[undefined?]]
>[] : [undefined?]
>[[[[]]]] : [[[[undefined?]]]]
>[[[]]] : [[[undefined?]]]
>[[]] : [[undefined?]]
>[] : [undefined?]
>c3 : undefined
>c4 : undefined
>[[[]], [[[[]]]]] : [[[]], [[[[]]]]]
>[[]] : [[]]
>[] : []
>[[[[]]]] : [[[[]]]]
>[[[]]] : [[[]]]
>[[]] : [[]]
>[] : []
var [[c5], c6]: [[string|number], boolean] = [[1], true];
>c5 : string | number
tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES6.errors.txt
+6 -6
View File
@@ -1,6 +1,6 @@
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES6.ts(43,6): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES6.ts(44,8): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES6.ts(44,18): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES6.ts(43,6): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES6.ts(44,8): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES6.ts(44,18): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
==== tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES6.ts (3 errors) ====
@@ -48,12 +48,12 @@ tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAss
var [c0, c1] = [...temp];
var [c2] = [];
~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
var [[[c3]], [[[[c4]]]]] = [[[]], [[[[]]]]]
~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
var [[c5], c6]: [[string|number], boolean] = [[1], true];
var [, c7] = [1, 2, 3];
var [,,, c8] = [1, 2, 3, 4];
tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES6.types
+11 -11
View File
@@ -92,19 +92,19 @@ var [c0, c1] = [...temp];
>temp : number[]
var [c2] = [];
>c2 : any
>[] : [undefined?]
>c2 : undefined
>[] : []
var [[[c3]], [[[[c4]]]]] = [[[]], [[[[]]]]]
>c3 : any
>c4 : any
>[[[]], [[[[]]]]] : [[[undefined?]], [[[[undefined?]]]]]
>[[]] : [[undefined?]]
>[] : [undefined?]
>[[[[]]]] : [[[[undefined?]]]]
>[[[]]] : [[[undefined?]]]
>[[]] : [[undefined?]]
>[] : [undefined?]
>c3 : undefined
>c4 : undefined
>[[[]], [[[[]]]]] : [[[]], [[[[]]]]]
>[[]] : [[]]
>[] : []
>[[[[]]]] : [[[[]]]]
>[[[]]] : [[[]]]
>[[]] : [[]]
>[] : []
var [[c5], c6]: [[string|number], boolean] = [[1], true];
>c5 : string | number
tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.errors.txt
+4 -4
View File
@@ -1,7 +1,7 @@
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(3,6): error TS2461: Type 'undefined' is not an array type.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(3,6): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(3,6): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(3,12): error TS2461: Type 'undefined' is not an array type.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(3,12): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(3,12): error TS2493: Tuple type '[]' of length '0' has no element at index '1'.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(4,5): error TS2461: Type 'undefined' is not an array type.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(9,51): error TS2322: Type 'number' is not assignable to type 'boolean'.
tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(22,5): error TS2739: Type 'number[]' is missing the following properties from type '[number, number]': 0, 1
@@ -16,11 +16,11 @@ tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAss
~~~~
!!! error TS2461: Type 'undefined' is not an array type.
~~~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
~~~~~~
!!! error TS2461: Type 'undefined' is not an array type.
~~~~~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '1'.
var [[a2], [[a3]]] = undefined // Error
~~~~~~~~~~~~~~
!!! error TS2461: Type 'undefined' is not an array type.
tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.types
+1 -1
View File
@@ -4,7 +4,7 @@
var [[a0], [[a1]]] = [] // Error
>a0 : any
>a1 : any
>[] : [undefined?, undefined?]
>[] : []
var [[a2], [[a3]]] = undefined // Error
>a2 : any
tests/baselines/reference/destructuringArrayBindingPatternAndAssignment3.types
+3 -3
View File
@@ -3,7 +3,7 @@ const [a, b = a] = [1]; // ok
>a : any
>b : any
>a : any
>[1] : [number, any?]
>[1] : [number]
>1 : 1
const [c, d = c, e = e] = [1]; // error for e = e
@@ -12,7 +12,7 @@ const [c, d = c, e = e] = [1]; // error for e = e
>c : any
>e : any
>e : any
>[1] : [number, any?, any?]
>[1] : [number]
>1 : 1
const [f, g = f, h = i, i = f] = [1]; // error for h = i
@@ -23,7 +23,7 @@ const [f, g = f, h = i, i = f] = [1]; // error for h = i
>i : any
>i : any
>f : any
>[1] : [number, any?, any?, any?]
>[1] : [number]
>1 : 1
(function ([a, b = a]) { // ok
tests/baselines/reference/destructuringTuple.errors.txt
+23
View File
@@ -0,0 +1,23 @@
tests/cases/compiler/destructuringTuple.ts(11,8): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
tests/cases/compiler/destructuringTuple.ts(11,60): error TS2345: Argument of type 'number' is not assignable to parameter of type 'ConcatArray<never>'.
==== tests/cases/compiler/destructuringTuple.ts (2 errors) ====
declare var tuple: [boolean, number, ...string[]];
const [a, b, c, ...rest] = tuple;
declare var receiver: typeof tuple;
[...receiver] = tuple;
// Repros from #32140
const [oops1] = [1, 2, 3].reduce((accu, el) => accu.concat(el), []);
~~~~~
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
~~
!!! error TS2345: Argument of type 'number' is not assignable to parameter of type 'ConcatArray<never>'.
const [oops2] = [1, 2, 3].reduce((acc: number[], e) => acc.concat(e), []);
tests/baselines/reference/destructuringTuple.js
+9
View File
@@ -6,9 +6,18 @@ const [a, b, c, ...rest] = tuple;
declare var receiver: typeof tuple;
[...receiver] = tuple;
// Repros from #32140
const [oops1] = [1, 2, 3].reduce((accu, el) => accu.concat(el), []);
const [oops2] = [1, 2, 3].reduce((acc: number[], e) => acc.concat(e), []);
//// [destructuringTuple.js]
"use strict";
var a = tuple[0], b = tuple[1], c = tuple[2], rest = tuple.slice(3);
receiver = tuple.slice(0);
// Repros from #32140
var oops1 = [1, 2, 3].reduce(function (accu, el) { return accu.concat(el); }, [])[0];
var oops2 = [1, 2, 3].reduce(function (acc, e) { return acc.concat(e); }, [])[0];
tests/baselines/reference/destructuringTuple.symbols
+24
View File
@@ -17,3 +17,27 @@ declare var receiver: typeof tuple;
>receiver : Symbol(receiver, Decl(destructuringTuple.ts, 4, 11))
>tuple : Symbol(tuple, Decl(destructuringTuple.ts, 0, 11))
// Repros from #32140
const [oops1] = [1, 2, 3].reduce((accu, el) => accu.concat(el), []);
>oops1 : Symbol(oops1, Decl(destructuringTuple.ts, 10, 7))
>[1, 2, 3].reduce : Symbol(Array.reduce, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>reduce : Symbol(Array.reduce, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>accu : Symbol(accu, Decl(destructuringTuple.ts, 10, 34))
>el : Symbol(el, Decl(destructuringTuple.ts, 10, 39))
>accu.concat : Symbol(Array.concat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>accu : Symbol(accu, Decl(destructuringTuple.ts, 10, 34))
>concat : Symbol(Array.concat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>el : Symbol(el, Decl(destructuringTuple.ts, 10, 39))
const [oops2] = [1, 2, 3].reduce((acc: number[], e) => acc.concat(e), []);
>oops2 : Symbol(oops2, Decl(destructuringTuple.ts, 12, 7))
>[1, 2, 3].reduce : Symbol(Array.reduce, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>reduce : Symbol(Array.reduce, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>acc : Symbol(acc, Decl(destructuringTuple.ts, 12, 34))
>e : Symbol(e, Decl(destructuringTuple.ts, 12, 48))
>acc.concat : Symbol(Array.concat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>acc : Symbol(acc, Decl(destructuringTuple.ts, 12, 34))
>concat : Symbol(Array.concat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>e : Symbol(e, Decl(destructuringTuple.ts, 12, 48))
tests/baselines/reference/destructuringTuple.types
+40
View File
@@ -20,3 +20,43 @@ declare var receiver: typeof tuple;
>receiver : [boolean, number, ...string[]]
>tuple : [boolean, number, ...string[]]
// Repros from #32140
const [oops1] = [1, 2, 3].reduce((accu, el) => accu.concat(el), []);
>oops1 : undefined
>[1, 2, 3].reduce((accu, el) => accu.concat(el), []) : []
>[1, 2, 3].reduce : { (callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: number[]) => number): number; (callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: number[]) => number, initialValue: number): number; <U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: number[]) => U, initialValue: U): U; }
>[1, 2, 3] : number[]
>1 : 1
>2 : 2
>3 : 3
>reduce : { (callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: number[]) => number): number; (callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: number[]) => number, initialValue: number): number; <U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: number[]) => U, initialValue: U): U; }
>(accu, el) => accu.concat(el) : (accu: [], el: number) => any
>accu : []
>el : number
>accu.concat(el) : any
>accu.concat : { (...items: ConcatArray<never>[]): never[]; (...items: ConcatArray<never>[]): never[]; }
>accu : []
>concat : { (...items: ConcatArray<never>[]): never[]; (...items: ConcatArray<never>[]): never[]; }
>el : number
>[] : []
const [oops2] = [1, 2, 3].reduce((acc: number[], e) => acc.concat(e), []);
>oops2 : number
>[1, 2, 3].reduce((acc: number[], e) => acc.concat(e), []) : number[]
>[1, 2, 3].reduce : { (callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: number[]) => number): number; (callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: number[]) => number, initialValue: number): number; <U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: number[]) => U, initialValue: U): U; }
>[1, 2, 3] : number[]
>1 : 1
>2 : 2
>3 : 3
>reduce : { (callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: number[]) => number): number; (callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: number[]) => number, initialValue: number): number; <U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: number[]) => U, initialValue: U): U; }
>(acc: number[], e) => acc.concat(e) : (acc: number[], e: number) => number[]
>acc : number[]
>e : number
>acc.concat(e) : number[]
>acc.concat : { (...items: ConcatArray<number>[]): number[]; (...items: (number | ConcatArray<number>)[]): number[]; }
>acc : number[]
>concat : { (...items: ConcatArray<number>[]): number[]; (...items: (number | ConcatArray<number>)[]): number[]; }
>e : number
>[] : never[]
tests/baselines/reference/destructuringVariableDeclaration1ES5.types
+3 -3
View File
@@ -151,9 +151,9 @@ var {f: [f1, f2, { f3: f4, f5 }, , ]} = { f: [1, 2, { f3: 4, f5: 0 }] };
>f4 : number
>f5 : number
> : undefined
>{ f: [1, 2, { f3: 4, f5: 0 }] } : { f: [number, number, { f3: number; f5: number; }, undefined?]; }
>f : [number, number, { f3: number; f5: number; }, undefined?]
>[1, 2, { f3: 4, f5: 0 }] : [number, number, { f3: number; f5: number; }, undefined?]
>{ f: [1, 2, { f3: 4, f5: 0 }] } : { f: [number, number, { f3: number; f5: number; }]; }
>f : [number, number, { f3: number; f5: number; }]
>[1, 2, { f3: 4, f5: 0 }] : [number, number, { f3: number; f5: number; }]
>1 : 1
>2 : 2
>{ f3: 4, f5: 0 } : { f3: number; f5: number; }
tests/baselines/reference/destructuringVariableDeclaration1ES5iterable.types
+3 -3
View File
@@ -151,9 +151,9 @@ var {f: [f1, f2, { f3: f4, f5 }, , ]} = { f: [1, 2, { f3: 4, f5: 0 }] };
>f4 : number
>f5 : number
> : undefined
>{ f: [1, 2, { f3: 4, f5: 0 }] } : { f: [number, number, { f3: number; f5: number; }, undefined?]; }
>f : [number, number, { f3: number; f5: number; }, undefined?]
>[1, 2, { f3: 4, f5: 0 }] : [number, number, { f3: number; f5: number; }, undefined?]
>{ f: [1, 2, { f3: 4, f5: 0 }] } : { f: [number, number, { f3: number; f5: number; }]; }
>f : [number, number, { f3: number; f5: number; }]
>[1, 2, { f3: 4, f5: 0 }] : [number, number, { f3: number; f5: number; }]
>1 : 1
>2 : 2
>{ f3: 4, f5: 0 } : { f3: number; f5: number; }
tests/baselines/reference/destructuringVariableDeclaration1ES6.types
+3 -3
View File
@@ -151,9 +151,9 @@ var {f: [f1, f2, { f3: f4, f5 }, , ]} = { f: [1, 2, { f3: 4, f5: 0 }] };
>f4 : number
>f5 : number
> : undefined
>{ f: [1, 2, { f3: 4, f5: 0 }] } : { f: [number, number, { f3: number; f5: number; }, undefined?]; }
>f : [number, number, { f3: number; f5: number; }, undefined?]
>[1, 2, { f3: 4, f5: 0 }] : [number, number, { f3: number; f5: number; }, undefined?]
>{ f: [1, 2, { f3: 4, f5: 0 }] } : { f: [number, number, { f3: number; f5: number; }]; }
>f : [number, number, { f3: number; f5: number; }]
>[1, 2, { f3: 4, f5: 0 }] : [number, number, { f3: number; f5: number; }]
>1 : 1
>2 : 2
>{ f3: 4, f5: 0 } : { f3: number; f5: number; }
tests/baselines/reference/destructuringVariableDeclaration2.types
+1 -1
View File
@@ -60,7 +60,7 @@ var [c1, c2, { c3: c4, c5 }, , ...c6] = [1, 2, { c3: 4, c5: 0 }]; // Error
>c5 : number
> : undefined
>c6 : []
>[1, 2, { c3: 4, c5: 0 }] : [number, number, { c3: number; c5: number; }, undefined?]
>[1, 2, { c3: 4, c5: 0 }] : [number, number, { c3: number; c5: number; }]
>1 : 1
>2 : 2
>{ c3: 4, c5: 0 } : { c3: number; c5: number; }
tests/baselines/reference/destructuringWithLiteralInitializers.types
+2 -2
View File
@@ -274,7 +274,7 @@ function g4([x, y = 0] = [0]) { }
>x : number
>y : number
>0 : 0
>[0] : [number, number?]
>[0] : [number]
>0 : 0
g4();
@@ -295,7 +295,7 @@ function g5([x = 0, y = 0] = []) { }
>0 : 0
>y : number
>0 : 0
>[] : [number?, number?]
>[] : []
g5();
>g5() : void
tests/baselines/reference/destructuringWithLiteralInitializers2.errors.txt
+55
View File
@@ -0,0 +1,55 @@
tests/cases/conformance/es6/destructuring/destructuringWithLiteralInitializers2.ts(1,15): error TS7031: Binding element 'x' implicitly has an 'any' type.
tests/cases/conformance/es6/destructuring/destructuringWithLiteralInitializers2.ts(1,18): error TS7031: Binding element 'y' implicitly has an 'any' type.
tests/cases/conformance/es6/destructuring/destructuringWithLiteralInitializers2.ts(2,15): error TS7031: Binding element 'x' implicitly has an 'any' type.
tests/cases/conformance/es6/destructuring/destructuringWithLiteralInitializers2.ts(2,18): error TS7031: Binding element 'y' implicitly has an 'any' type.
tests/cases/conformance/es6/destructuring/destructuringWithLiteralInitializers2.ts(3,18): error TS7031: Binding element 'y' implicitly has an 'any' type.
tests/cases/conformance/es6/destructuring/destructuringWithLiteralInitializers2.ts(6,22): error TS7031: Binding element 'y' implicitly has an 'any' type.
tests/cases/conformance/es6/destructuring/destructuringWithLiteralInitializers2.ts(7,22): error TS7031: Binding element 'y' implicitly has an 'any' type.
tests/cases/conformance/es6/destructuring/destructuringWithLiteralInitializers2.ts(8,22): error TS7031: Binding element 'y' implicitly has an 'any' type.
==== tests/cases/conformance/es6/destructuring/destructuringWithLiteralInitializers2.ts (8 errors) ====
function f00([x, y]) {}
~
!!! error TS7031: Binding element 'x' implicitly has an 'any' type.
~
!!! error TS7031: Binding element 'y' implicitly has an 'any' type.
function f01([x, y] = []) {}
~
!!! error TS7031: Binding element 'x' implicitly has an 'any' type.
~
!!! error TS7031: Binding element 'y' implicitly has an 'any' type.
function f02([x, y] = [1]) {}
~
!!! error TS7031: Binding element 'y' implicitly has an 'any' type.
function f03([x, y] = [1, 'foo']) {}
function f10([x = 0, y]) {}
~
!!! error TS7031: Binding element 'y' implicitly has an 'any' type.
function f11([x = 0, y] = []) {}
~
!!! error TS7031: Binding element 'y' implicitly has an 'any' type.
function f12([x = 0, y] = [1]) {}
~
!!! error TS7031: Binding element 'y' implicitly has an 'any' type.
function f13([x = 0, y] = [1, 'foo']) {}
function f20([x = 0, y = 'bar']) {}
function f21([x = 0, y = 'bar'] = []) {}
function f22([x = 0, y = 'bar'] = [1]) {}
function f23([x = 0, y = 'bar'] = [1, 'foo']) {}
declare const nx: number | undefined;
declare const sx: string | undefined;
function f30([x = 0, y = 'bar']) {}
function f31([x = 0, y = 'bar'] = []) {}
function f32([x = 0, y = 'bar'] = [nx]) {}
function f33([x = 0, y = 'bar'] = [nx, sx]) {}
function f40([x = 0, y = 'bar']) {}
function f41([x = 0, y = 'bar'] = []) {}
function f42([x = 0, y = 'bar'] = [sx]) {}
function f43([x = 0, y = 'bar'] = [sx, nx]) {}
tests/baselines/reference/destructuringWithLiteralInitializers2.js
+92
View File
@@ -0,0 +1,92 @@
//// [destructuringWithLiteralInitializers2.ts]
function f00([x, y]) {}
function f01([x, y] = []) {}
function f02([x, y] = [1]) {}
function f03([x, y] = [1, 'foo']) {}
function f10([x = 0, y]) {}
function f11([x = 0, y] = []) {}
function f12([x = 0, y] = [1]) {}
function f13([x = 0, y] = [1, 'foo']) {}
function f20([x = 0, y = 'bar']) {}
function f21([x = 0, y = 'bar'] = []) {}
function f22([x = 0, y = 'bar'] = [1]) {}
function f23([x = 0, y = 'bar'] = [1, 'foo']) {}
declare const nx: number | undefined;
declare const sx: string | undefined;
function f30([x = 0, y = 'bar']) {}
function f31([x = 0, y = 'bar'] = []) {}
function f32([x = 0, y = 'bar'] = [nx]) {}
function f33([x = 0, y = 'bar'] = [nx, sx]) {}
function f40([x = 0, y = 'bar']) {}
function f41([x = 0, y = 'bar'] = []) {}
function f42([x = 0, y = 'bar'] = [sx]) {}
function f43([x = 0, y = 'bar'] = [sx, nx]) {}
//// [destructuringWithLiteralInitializers2.js]
"use strict";
function f00(_a) {
var x = _a[0], y = _a[1];
}
function f01(_a) {
var _b = _a === void 0 ? [] : _a, x = _b[0], y = _b[1];
}
function f02(_a) {
var _b = _a === void 0 ? [1] : _a, x = _b[0], y = _b[1];
}
function f03(_a) {
var _b = _a === void 0 ? [1, 'foo'] : _a, x = _b[0], y = _b[1];
}
function f10(_a) {
var _b = _a[0], x = _b === void 0 ? 0 : _b, y = _a[1];
}
function f11(_a) {
var _b = _a === void 0 ? [] : _a, _c = _b[0], x = _c === void 0 ? 0 : _c, y = _b[1];
}
function f12(_a) {
var _b = _a === void 0 ? [1] : _a, _c = _b[0], x = _c === void 0 ? 0 : _c, y = _b[1];
}
function f13(_a) {
var _b = _a === void 0 ? [1, 'foo'] : _a, _c = _b[0], x = _c === void 0 ? 0 : _c, y = _b[1];
}
function f20(_a) {
var _b = _a[0], x = _b === void 0 ? 0 : _b, _c = _a[1], y = _c === void 0 ? 'bar' : _c;
}
function f21(_a) {
var _b = _a === void 0 ? [] : _a, _c = _b[0], x = _c === void 0 ? 0 : _c, _d = _b[1], y = _d === void 0 ? 'bar' : _d;
}
function f22(_a) {
var _b = _a === void 0 ? [1] : _a, _c = _b[0], x = _c === void 0 ? 0 : _c, _d = _b[1], y = _d === void 0 ? 'bar' : _d;
}
function f23(_a) {
var _b = _a === void 0 ? [1, 'foo'] : _a, _c = _b[0], x = _c === void 0 ? 0 : _c, _d = _b[1], y = _d === void 0 ? 'bar' : _d;
}
function f30(_a) {
var _b = _a[0], x = _b === void 0 ? 0 : _b, _c = _a[1], y = _c === void 0 ? 'bar' : _c;
}
function f31(_a) {
var _b = _a === void 0 ? [] : _a, _c = _b[0], x = _c === void 0 ? 0 : _c, _d = _b[1], y = _d === void 0 ? 'bar' : _d;
}
function f32(_a) {
var _b = _a === void 0 ? [nx] : _a, _c = _b[0], x = _c === void 0 ? 0 : _c, _d = _b[1], y = _d === void 0 ? 'bar' : _d;
}
function f33(_a) {
var _b = _a === void 0 ? [nx, sx] : _a, _c = _b[0], x = _c === void 0 ? 0 : _c, _d = _b[1], y = _d === void 0 ? 'bar' : _d;
}
function f40(_a) {
var _b = _a[0], x = _b === void 0 ? 0 : _b, _c = _a[1], y = _c === void 0 ? 'bar' : _c;
}
function f41(_a) {
var _b = _a === void 0 ? [] : _a, _c = _b[0], x = _c === void 0 ? 0 : _c, _d = _b[1], y = _d === void 0 ? 'bar' : _d;
}
function f42(_a) {
var _b = _a === void 0 ? [sx] : _a, _c = _b[0], x = _c === void 0 ? 0 : _c, _d = _b[1], y = _d === void 0 ? 'bar' : _d;
}
function f43(_a) {
var _b = _a === void 0 ? [sx, nx] : _a, _c = _b[0], x = _c === void 0 ? 0 : _c, _d = _b[1], y = _d === void 0 ? 'bar' : _d;
}
tests/baselines/reference/destructuringWithLiteralInitializers2.symbols
+113
View File
@@ -0,0 +1,113 @@
=== tests/cases/conformance/es6/destructuring/destructuringWithLiteralInitializers2.ts ===
function f00([x, y]) {}
>f00 : Symbol(f00, Decl(destructuringWithLiteralInitializers2.ts, 0, 0))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 0, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 0, 16))
function f01([x, y] = []) {}
>f01 : Symbol(f01, Decl(destructuringWithLiteralInitializers2.ts, 0, 23))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 1, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 1, 16))
function f02([x, y] = [1]) {}
>f02 : Symbol(f02, Decl(destructuringWithLiteralInitializers2.ts, 1, 28))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 2, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 2, 16))
function f03([x, y] = [1, 'foo']) {}
>f03 : Symbol(f03, Decl(destructuringWithLiteralInitializers2.ts, 2, 29))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 3, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 3, 16))
function f10([x = 0, y]) {}
>f10 : Symbol(f10, Decl(destructuringWithLiteralInitializers2.ts, 3, 36))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 5, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 5, 20))
function f11([x = 0, y] = []) {}
>f11 : Symbol(f11, Decl(destructuringWithLiteralInitializers2.ts, 5, 27))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 6, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 6, 20))
function f12([x = 0, y] = [1]) {}
>f12 : Symbol(f12, Decl(destructuringWithLiteralInitializers2.ts, 6, 32))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 7, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 7, 20))
function f13([x = 0, y] = [1, 'foo']) {}
>f13 : Symbol(f13, Decl(destructuringWithLiteralInitializers2.ts, 7, 33))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 8, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 8, 20))
function f20([x = 0, y = 'bar']) {}
>f20 : Symbol(f20, Decl(destructuringWithLiteralInitializers2.ts, 8, 40))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 10, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 10, 20))
function f21([x = 0, y = 'bar'] = []) {}
>f21 : Symbol(f21, Decl(destructuringWithLiteralInitializers2.ts, 10, 35))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 11, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 11, 20))
function f22([x = 0, y = 'bar'] = [1]) {}
>f22 : Symbol(f22, Decl(destructuringWithLiteralInitializers2.ts, 11, 40))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 12, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 12, 20))
function f23([x = 0, y = 'bar'] = [1, 'foo']) {}
>f23 : Symbol(f23, Decl(destructuringWithLiteralInitializers2.ts, 12, 41))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 13, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 13, 20))
declare const nx: number | undefined;
>nx : Symbol(nx, Decl(destructuringWithLiteralInitializers2.ts, 15, 13))
declare const sx: string | undefined;
>sx : Symbol(sx, Decl(destructuringWithLiteralInitializers2.ts, 16, 13))
function f30([x = 0, y = 'bar']) {}
>f30 : Symbol(f30, Decl(destructuringWithLiteralInitializers2.ts, 16, 37))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 18, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 18, 20))
function f31([x = 0, y = 'bar'] = []) {}
>f31 : Symbol(f31, Decl(destructuringWithLiteralInitializers2.ts, 18, 35))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 19, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 19, 20))
function f32([x = 0, y = 'bar'] = [nx]) {}
>f32 : Symbol(f32, Decl(destructuringWithLiteralInitializers2.ts, 19, 40))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 20, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 20, 20))
>nx : Symbol(nx, Decl(destructuringWithLiteralInitializers2.ts, 15, 13))
function f33([x = 0, y = 'bar'] = [nx, sx]) {}
>f33 : Symbol(f33, Decl(destructuringWithLiteralInitializers2.ts, 20, 42))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 21, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 21, 20))
>nx : Symbol(nx, Decl(destructuringWithLiteralInitializers2.ts, 15, 13))
>sx : Symbol(sx, Decl(destructuringWithLiteralInitializers2.ts, 16, 13))
function f40([x = 0, y = 'bar']) {}
>f40 : Symbol(f40, Decl(destructuringWithLiteralInitializers2.ts, 21, 46))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 23, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 23, 20))
function f41([x = 0, y = 'bar'] = []) {}
>f41 : Symbol(f41, Decl(destructuringWithLiteralInitializers2.ts, 23, 35))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 24, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 24, 20))
function f42([x = 0, y = 'bar'] = [sx]) {}
>f42 : Symbol(f42, Decl(destructuringWithLiteralInitializers2.ts, 24, 40))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 25, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 25, 20))
>sx : Symbol(sx, Decl(destructuringWithLiteralInitializers2.ts, 16, 13))
function f43([x = 0, y = 'bar'] = [sx, nx]) {}
>f43 : Symbol(f43, Decl(destructuringWithLiteralInitializers2.ts, 25, 42))
>x : Symbol(x, Decl(destructuringWithLiteralInitializers2.ts, 26, 14))
>y : Symbol(y, Decl(destructuringWithLiteralInitializers2.ts, 26, 20))
>sx : Symbol(sx, Decl(destructuringWithLiteralInitializers2.ts, 16, 13))
>nx : Symbol(nx, Decl(destructuringWithLiteralInitializers2.ts, 15, 13))
tests/baselines/reference/destructuringWithLiteralInitializers2.types
+165
View File
@@ -0,0 +1,165 @@
=== tests/cases/conformance/es6/destructuring/destructuringWithLiteralInitializers2.ts ===
function f00([x, y]) {}
>f00 : ([x, y]: [any, any]) => void
>x : any
>y : any
function f01([x, y] = []) {}
>f01 : ([x, y]?: [any?, any?]) => void
>x : any
>y : any
>[] : []
function f02([x, y] = [1]) {}
>f02 : ([x, y]?: [number, any?]) => void
>x : number
>y : any
>[1] : [number]
>1 : 1
function f03([x, y] = [1, 'foo']) {}
>f03 : ([x, y]?: [number, string]) => void
>x : number
>y : string
>[1, 'foo'] : [number, string]
>1 : 1
>'foo' : "foo"
function f10([x = 0, y]) {}
>f10 : ([x, y]: [number | undefined, any]) => void
>x : number
>0 : 0
>y : any
function f11([x = 0, y] = []) {}
>f11 : ([x, y]?: [(number | undefined)?, any?]) => void
>x : number
>0 : 0
>y : any
>[] : []
function f12([x = 0, y] = [1]) {}
>f12 : ([x, y]?: [number, any?]) => void
>x : number
>0 : 0
>y : any
>[1] : [number]
>1 : 1
function f13([x = 0, y] = [1, 'foo']) {}
>f13 : ([x, y]?: [number, string]) => void
>x : number
>0 : 0
>y : string
>[1, 'foo'] : [number, string]
>1 : 1
>'foo' : "foo"
function f20([x = 0, y = 'bar']) {}
>f20 : ([x, y]: [(number | undefined)?, (string | undefined)?]) => void
>x : number
>0 : 0
>y : string
>'bar' : "bar"
function f21([x = 0, y = 'bar'] = []) {}
>f21 : ([x, y]?: [(number | undefined)?, (string | undefined)?]) => void
>x : number
>0 : 0
>y : string
>'bar' : "bar"
>[] : []
function f22([x = 0, y = 'bar'] = [1]) {}
>f22 : ([x, y]?: [number, (string | undefined)?]) => void
>x : number
>0 : 0
>y : string
>'bar' : "bar"
>[1] : [number]
>1 : 1
function f23([x = 0, y = 'bar'] = [1, 'foo']) {}
>f23 : ([x, y]?: [number, string]) => void
>x : number
>0 : 0
>y : string
>'bar' : "bar"
>[1, 'foo'] : [number, string]
>1 : 1
>'foo' : "foo"
declare const nx: number | undefined;
>nx : number | undefined
declare const sx: string | undefined;
>sx : string | undefined
function f30([x = 0, y = 'bar']) {}
>f30 : ([x, y]: [(number | undefined)?, (string | undefined)?]) => void
>x : number
>0 : 0
>y : string
>'bar' : "bar"
function f31([x = 0, y = 'bar'] = []) {}
>f31 : ([x, y]?: [(number | undefined)?, (string | undefined)?]) => void
>x : number
>0 : 0
>y : string
>'bar' : "bar"
>[] : []
function f32([x = 0, y = 'bar'] = [nx]) {}
>f32 : ([x, y]?: [number | undefined, (string | undefined)?]) => void
>x : number
>0 : 0
>y : string
>'bar' : "bar"
>[nx] : [number | undefined]
>nx : number | undefined
function f33([x = 0, y = 'bar'] = [nx, sx]) {}
>f33 : ([x, y]?: [number | undefined, string | undefined]) => void
>x : number
>0 : 0
>y : string
>'bar' : "bar"
>[nx, sx] : [number | undefined, string | undefined]
>nx : number | undefined
>sx : string | undefined
function f40([x = 0, y = 'bar']) {}
>f40 : ([x, y]: [(number | undefined)?, (string | undefined)?]) => void
>x : number
>0 : 0
>y : string
>'bar' : "bar"
function f41([x = 0, y = 'bar'] = []) {}
>f41 : ([x, y]?: [(number | undefined)?, (string | undefined)?]) => void
>x : number
>0 : 0
>y : string
>'bar' : "bar"
>[] : []
function f42([x = 0, y = 'bar'] = [sx]) {}
>f42 : ([x, y]?: [string | undefined, (string | undefined)?]) => void
>x : string | number
>0 : 0
>y : string
>'bar' : "bar"
>[sx] : [string | undefined]
>sx : string | undefined
function f43([x = 0, y = 'bar'] = [sx, nx]) {}
>f43 : ([x, y]?: [string | undefined, number | undefined]) => void
>x : string | number
>0 : 0
>y : string | number
>'bar' : "bar"
>[sx, nx] : [string | undefined, number | undefined]
>sx : string | undefined
>nx : number | undefined
tests/baselines/reference/downlevelLetConst12.errors.txt
+4 -4
View File
@@ -1,5 +1,5 @@
tests/cases/compiler/downlevelLetConst12.ts(6,6): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/compiler/downlevelLetConst12.ts(9,8): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/compiler/downlevelLetConst12.ts(6,6): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
tests/cases/compiler/downlevelLetConst12.ts(9,8): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
==== tests/cases/compiler/downlevelLetConst12.ts (2 errors) ====
@@ -10,10 +10,10 @@ tests/cases/compiler/downlevelLetConst12.ts(9,8): error TS2525: Initializer prov
let [baz] = [];
~~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
let {a: baz2} = { a: 1 };
const [baz3] = []
~~~~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
const {a: baz4} = { a: 1 };
tests/baselines/reference/downlevelLetConst12.types
+4 -4
View File
@@ -11,8 +11,8 @@ const bar = 1;
>1 : 1
let [baz] = [];
>baz : any
>[] : [undefined?]
>baz : undefined
>[] : []
let {a: baz2} = { a: 1 };
>a : any
@@ -22,8 +22,8 @@ let {a: baz2} = { a: 1 };
>1 : 1
const [baz3] = []
>baz3 : any
>[] : [undefined?]
>baz3 : undefined
>[] : []
const {a: baz4} = { a: 1 };
>a : any
tests/baselines/reference/downlevelLetConst16.errors.txt
+4 -4
View File
@@ -1,5 +1,5 @@
tests/cases/compiler/downlevelLetConst16.ts(151,15): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/compiler/downlevelLetConst16.ts(164,17): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
tests/cases/compiler/downlevelLetConst16.ts(151,15): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
tests/cases/compiler/downlevelLetConst16.ts(164,17): error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
tests/cases/compiler/downlevelLetConst16.ts(195,14): error TS2461: Type 'undefined' is not an array type.
tests/cases/compiler/downlevelLetConst16.ts(202,15): error TS2339: Property 'a' does not exist on type 'undefined'.
tests/cases/compiler/downlevelLetConst16.ts(216,16): error TS2461: Type 'undefined' is not an array type.
@@ -159,7 +159,7 @@ tests/cases/compiler/downlevelLetConst16.ts(223,17): error TS2339: Property 'a'
}
for (let [y] = []; ;) {
~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
use(y);
}
for (let {a: z} = {a: 1}; ;) {
@@ -174,7 +174,7 @@ tests/cases/compiler/downlevelLetConst16.ts(223,17): error TS2339: Property 'a'
}
for (const [y] = []; ;) {
~
!!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
!!! error TS2493: Tuple type '[]' of length '0' has no element at index '0'.
use(y);
}
for (const {a: z} = { a: 1 }; ;) {
tests/baselines/reference/downlevelLetConst16.types
+6 -6
View File
@@ -515,13 +515,13 @@ function foo3() {
>x : any
}
for (let [y] = []; ;) {
>y : any
>[] : [undefined?]
>y : undefined
>[] : []
use(y);
>use(y) : any
>use : (a: any) => any
>y : any
>y : undefined
}
for (let {a: z} = {a: 1}; ;) {
>a : any
@@ -554,13 +554,13 @@ function foo4() {
>x : 1
}
for (const [y] = []; ;) {
>y : any
>[] : [undefined?]
>y : undefined
>[] : []
use(y);
>use(y) : any
>use : (a: any) => any
>y : any
>y : undefined
}
for (const {a: z} = { a: 1 }; ;) {
>a : any
tests/baselines/reference/noImplicitAnyDestructuringVarDeclaration.types
+1 -1
View File
@@ -44,5 +44,5 @@ var [a4] = [undefined], {b4} = { b4: null }, c4 = undefined, d4 = null; // error
var [a5 = undefined] = []; // error
>a5 : any
>undefined : undefined
>[] : [undefined?]
>[] : []
tests/baselines/reference/recursiveLetConst.types
+1 -1
View File
@@ -49,7 +49,7 @@ for (let [v] of v) { }
let [x2 = x2] = []
>x2 : any
>x2 : any
>[] : [any?]
>[] : []
let z0 = () => z0;
>z0 : () => any
tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues3.types
+9 -9
View File
@@ -234,11 +234,11 @@ let multiRobotAInfo: (string | string[])[];
[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] = multiRobotB;
>[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] = multiRobotB : [string, string[]]
>[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] : [string, [string?, string?]]
>[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] : [string, []]
>nameMB = "helloNoName" : "helloNoName"
>nameMB : string
>"helloNoName" : "helloNoName"
>[primarySkillB = "noSkill", secondarySkillB = "noSkill"] = [] : [string?, string?]
>[primarySkillB = "noSkill", secondarySkillB = "noSkill"] = [] : []
>[primarySkillB = "noSkill", secondarySkillB = "noSkill"] : [string, string]
>primarySkillB = "noSkill" : "noSkill"
>primarySkillB : string
@@ -246,16 +246,16 @@ let multiRobotAInfo: (string | string[])[];
>secondarySkillB = "noSkill" : "noSkill"
>secondarySkillB : string
>"noSkill" : "noSkill"
>[] : [string?, string?]
>[] : []
>multiRobotB : [string, string[]]
[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] = getMultiRobotB();
>[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] = getMultiRobotB() : [string, string[]]
>[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] : [string, [string?, string?]]
>[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] : [string, []]
>nameMB = "helloNoName" : "helloNoName"
>nameMB : string
>"helloNoName" : "helloNoName"
>[primarySkillB = "noSkill", secondarySkillB = "noSkill"] = [] : [string?, string?]
>[primarySkillB = "noSkill", secondarySkillB = "noSkill"] = [] : []
>[primarySkillB = "noSkill", secondarySkillB = "noSkill"] : [string, string]
>primarySkillB = "noSkill" : "noSkill"
>primarySkillB : string
@@ -263,17 +263,17 @@ let multiRobotAInfo: (string | string[])[];
>secondarySkillB = "noSkill" : "noSkill"
>secondarySkillB : string
>"noSkill" : "noSkill"
>[] : [string?, string?]
>[] : []
>getMultiRobotB() : [string, string[]]
>getMultiRobotB : () => [string, string[]]
[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] =
>[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] = ["trimmer", ["trimming", "edging"]] : [string, [string, string]]
>[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] : [string, [string?, string?]]
>[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] : [string, []]
>nameMB = "helloNoName" : "helloNoName"
>nameMB : string
>"helloNoName" : "helloNoName"
>[primarySkillB = "noSkill", secondarySkillB = "noSkill"] = [] : [string?, string?]
>[primarySkillB = "noSkill", secondarySkillB = "noSkill"] = [] : []
>[primarySkillB = "noSkill", secondarySkillB = "noSkill"] : [string, string]
>primarySkillB = "noSkill" : "noSkill"
>primarySkillB : string
@@ -281,7 +281,7 @@ let multiRobotAInfo: (string | string[])[];
>secondarySkillB = "noSkill" : "noSkill"
>secondarySkillB : string
>"noSkill" : "noSkill"
>[] : [string?, string?]
>[] : []
["trimmer", ["trimming", "edging"]];
>["trimmer", ["trimming", "edging"]] : [string, [string, string]]
tests/cases/compiler/destructuringTuple.ts
+6
View File
@@ -7,3 +7,9 @@ const [a, b, c, ...rest] = tuple;
declare var receiver: typeof tuple;
[...receiver] = tuple;
// Repros from #32140
const [oops1] = [1, 2, 3].reduce((accu, el) => accu.concat(el), []);
const [oops2] = [1, 2, 3].reduce((acc: number[], e) => acc.concat(e), []);
tests/cases/conformance/es6/destructuring/destructuringWithLiteralInitializers2.ts
+29
View File
@@ -0,0 +1,29 @@
// @strict: true
function f00([x, y]) {}
function f01([x, y] = []) {}
function f02([x, y] = [1]) {}
function f03([x, y] = [1, 'foo']) {}
function f10([x = 0, y]) {}
function f11([x = 0, y] = []) {}
function f12([x = 0, y] = [1]) {}
function f13([x = 0, y] = [1, 'foo']) {}
function f20([x = 0, y = 'bar']) {}
function f21([x = 0, y = 'bar'] = []) {}
function f22([x = 0, y = 'bar'] = [1]) {}
function f23([x = 0, y = 'bar'] = [1, 'foo']) {}
declare const nx: number | undefined;
declare const sx: string | undefined;
function f30([x = 0, y = 'bar']) {}
function f31([x = 0, y = 'bar'] = []) {}
function f32([x = 0, y = 'bar'] = [nx]) {}
function f33([x = 0, y = 'bar'] = [nx, sx]) {}
function f40([x = 0, y = 'bar']) {}
function f41([x = 0, y = 'bar'] = []) {}
function f42([x = 0, y = 'bar'] = [sx]) {}
function f43([x = 0, y = 'bar'] = [sx, nx]) {}