mirror of
https://github.com/swc-project/swc.git
synced 2024-12-01 01:13:56 +03:00
55 lines
2.5 KiB
TypeScript
55 lines
2.5 KiB
TypeScript
// @target:es6
|
|
// ElementList: ( Modified )
|
|
// Elisionopt AssignmentExpression
|
|
// Elisionopt SpreadElement
|
|
// ElementList, Elisionopt AssignmentExpression
|
|
// ElementList, Elisionopt SpreadElement
|
|
|
|
// SpreadElement:
|
|
// ... AssignmentExpression
|
|
|
|
var a0 = [, , 2, 3, 4]
|
|
var a1 = ["hello", "world"]
|
|
var a2 = [, , , ...a0, "hello"];
|
|
var a3 = [, , ...a0]
|
|
var a4 = [() => 1, ];
|
|
var a5 = [...a0, , ]
|
|
|
|
// Each element expression in a non-empty array literal is processed as follows:
|
|
// - If the array literal contains no spread elements, and if the array literal is contextually typed (section 4.19)
|
|
// by a type T and T has a property with the numeric name N, where N is the index of the element expression in the array literal,
|
|
// the element expression is contextually typed by the type of that property.
|
|
|
|
// The resulting type an array literal expression is determined as follows:
|
|
// - If the array literal contains no spread elements and is contextually typed by a tuple-like type,
|
|
// the resulting type is a tuple type constructed from the types of the element expressions.
|
|
|
|
var b0: [any, any, any] = [undefined, null, undefined];
|
|
var b1: [number[], string[]] = [[1, 2, 3], ["hello", "string"]];
|
|
|
|
// The resulting type an array literal expression is determined as follows:
|
|
// - If the array literal contains no spread elements and is an array assignment pattern in a destructuring assignment (section 4.17.1),
|
|
// the resulting type is a tuple type constructed from the types of the element expressions.
|
|
|
|
var [c0, c1] = [1, 2]; // tuple type [number, number]
|
|
var [c2, c3] = [1, 2, true]; // tuple type [number, number, boolean]
|
|
|
|
// The resulting type an array literal expression is determined as follows:
|
|
// - the resulting type is an array type with an element type that is the union of the types of the
|
|
// non - spread element expressions and the numeric index signature types of the spread element expressions
|
|
var temp = ["s", "t", "r"];
|
|
var temp1 = [1, 2, 3];
|
|
var temp2: [number[], string[]] = [[1, 2, 3], ["hello", "string"]];
|
|
|
|
interface myArray extends Array<Number> { }
|
|
interface myArray2 extends Array<Number|String> { }
|
|
var d0 = [1, true, ...temp, ]; // has type (string|number|boolean)[]
|
|
var d1 = [...temp]; // has type string[]
|
|
var d2: number[] = [...temp1];
|
|
var d3: myArray = [...temp1];
|
|
var d4: myArray2 = [...temp, ...temp1];
|
|
var d5 = [...a2];
|
|
var d6 = [...a3];
|
|
var d7 = [...a4];
|
|
var d8: number[][] = [[...temp1]]
|
|
var d9 = [[...temp1], ...["hello"]]; |