swc/tests/tsc-references/es6/destructuring/destructuringArrayBindingPatternAndAssignment1ES5iterable/input.ts/es2015.1.normal/output.js

107 lines
2.3 KiB
JavaScript

// @downlevelIteration: true
/* AssignmentPattern:
* ObjectAssignmentPattern
* ArrayAssignmentPattern
* ArrayAssignmentPattern:
* [Elision<opt> AssignmentRestElementopt ]
* [AssignmentElementList]
* [AssignmentElementList, Elision<opt> AssignmentRestElementopt ]
* AssignmentElementList:
* Elision<opt> AssignmentElement
* AssignmentElementList, Elisionopt AssignmentElement
* AssignmentElement:
* LeftHandSideExpression Initialiseropt
* AssignmentPattern Initialiseropt
* AssignmentRestElement:
* ... LeftHandSideExpression
*/ // In a destructuring assignment expression, the type of the expression on the right must be assignable to the assignment target on the left.
// An expression of type S is considered assignable to an assignment target V if one of the following is true
// V is an array assignment pattern, S is the type Any or an array-like type (section 3.3.2), and, for each assignment element E in V,
// S is the type Any, or
var [a0, a1] = undefined;
var [a2 = false, a3 = 1] = undefined;
// V is an array assignment pattern, S is the type Any or an array-like type (section 3.3.2), and, for each assignment element E in V,
// S is a tuple- like type (section 3.3.3) with a property named N of a type that is assignable to the target given in E,
// where N is the numeric index of E in the array assignment pattern, or
var [b0, b1, b2] = [
2,
3,
4
];
var [b3, b4, b5] = [
1,
2,
"string"
];
function foo() {
return [
1,
2,
3
];
}
var [b6, b7] = foo();
var [...b8] = foo();
// S is not a tuple- like type and the numeric index signature type of S is assignable to the target given in E.
var temp = [
1,
2,
3
];
var [c0, c1] = [
...temp
];
var [c2] = [];
var [[[c3]], [[[[c4]]]]] = [
[
[]
],
[
[
[
[]
]
]
]
];
var [[c5], c6] = [
[
1
],
true
];
var [, c7] = [
1,
2,
3
];
var [, , , c8] = [
1,
2,
3,
4
];
var [, , , c9] = [
1,
2,
3,
4
];
var [, , , ...c10] = [
1,
2,
3,
4,
"hello"
];
var [c11, c12, ...c13] = [
1,
2,
"string"
];
var [c14, c15, c16] = [
1,
2,
"string"
];