mirror of
https://github.com/swc-project/swc.git
synced 2024-12-30 00:52:29 +03:00
96 lines
3.5 KiB
JavaScript
96 lines
3.5 KiB
JavaScript
// self - local self
|
|
|
|
// ArrayBindingPattern -> [Elision? BindingRestElement -> BindingIdentifier]
|
|
|
|
/*
|
|
* ArrayBindingPattern
|
|
* Elision = ,
|
|
* BindingRestElement = ... SELF | ... identifier
|
|
* BindingElementList = ,? BindingElement | self ,? BindingElement
|
|
* BindingElement = identifier = _ | SELF = _
|
|
*
|
|
* */
|
|
let simple_array = [1, 2, 3, 4, 5, 6]
|
|
let multi_array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
|
|
let multi_array_2 = [[[1, 2, 3, 4], [5, 6, 7, 8, 9]]]
|
|
let obj = {
|
|
num: 10,
|
|
null: null,
|
|
nested: {nested: {val: "val"}, array: simple_array},
|
|
s_array: simple_array,
|
|
m_array: multi_array
|
|
}
|
|
// ------- BindingPattern = SELF
|
|
{
|
|
let [...tail] = simple_array // [ 1, 2, 3, 4, 5, 6 ]
|
|
let [, ...tail_1] = simple_array // [ 2, 3, 4, 5, 6 ]
|
|
let [, , , ...tail_2] = simple_array // [ 4, 5, 6 ]
|
|
|
|
// ArrayBindingPattern -> [Elision? BindingRestElement -> BindingPattern -> ArrayBindingPattern -> [Elision? BindingRestElement -> BindingIdentifier]]
|
|
let [...[...tail_3]] = multi_array // [[ 1, 2, 3 ],[ 4, 5, 6 ],[ 7, 8, 9 ]]
|
|
let [...[...tail_4]] = multi_array_2 // [ [ [ 1, 2, 3, 4 ], [ 5, 6, 7, 8, 9 ] ] ]
|
|
let [...[...[...tail_5]]] = multi_array_2 // [ [ [ 1, 2, 3, 4 ], [ 5, 6, 7, 8, 9 ] ] ]
|
|
let [, ...[, ...tail_6]] = multi_array // [ [ 7, 8, 9 ] ]
|
|
let [, ...[, ...tail_7]] = multi_array_2 // []
|
|
let [, ...[, , ...tail_8]] = [1, 2, 3, [4, 5, 6, 7]] // [ [ 4, 5, 6, 7 ] ]
|
|
|
|
// ArrayBindingPattern -> [Elision? BindingRestElement -> BindingPattern -> ObjectBindingPattern ... ]
|
|
|
|
// ArrayBindingPattern -> [BindingElementList -> BindingElisionElement -> BindingElement -> SingleNameBinding]
|
|
let [a = 10] = simple_array // 1
|
|
let [, ab = 10, , ,] = simple_array // 2
|
|
let [, , , ba = ab] = simple_array // 4
|
|
|
|
// ArrayBindingPattern -> [BindingElementList -> BindingElisionElement -> BindingElement -> BindingPattern]
|
|
// ArrayBindingPattern -> [BindingElementList,Elision? BindingRestElement]
|
|
let [, v1, , ...v_rest] = simple_array // 2 [ 4, 5, 6 ]
|
|
|
|
/*
|
|
* ObjectBindingPattern
|
|
* {}
|
|
* {BindingRestProperty} = ... id
|
|
* {BindingPropertyList} = BindingProperty | self,BindingProperty
|
|
* {BindingPropertyList,BindingRestProperty }
|
|
* BindingProperty = id = _ | PropertyName : id = _ | PropertyName : SELF = _
|
|
* PropertyName = ((UnicodeIDStart | $ | _ ) (UnicodeIDContinue | $ | <ZWNJ> <ZWJ> ) | "string" | 'string' | num | [ _ ]
|
|
* */
|
|
// ObjectBindingPattern -> {}
|
|
let {} = obj // {}
|
|
// ObjectBindingPattern -> {BindingRestProperty}
|
|
let {...obj2} = obj // obj
|
|
var {...obj3} = obj // obj
|
|
|
|
// ObjectBindingPattern -> {BindingPropertyList}
|
|
let {simple_prop = 10} = obj // 10
|
|
let {obj_prop = {value: prop2 = 10}, prop3 = [1]} = obj // obj_prop = {value:10},prop2 = 10
|
|
let {obj1 = {$: num = 10, '': sym = '', " ": quote = " ", _: under = [...tail],}} = obj // obj_prop = {value:10},prop2 = 10
|
|
}
|
|
// ----------------- //
|
|
|
|
// Spots
|
|
// PrimaryExpression -> (...SELF) | (Expression, ...SELF)
|
|
// LexicalDeclaration[ -> (let | const) SELF
|
|
// Iteration Statements -> for((var | let | const) SELF (in | of) ...)
|
|
// TryStatement -> try{...} catch(SELF){...}
|
|
class MyError extends Error {
|
|
constructor(name1, name2) {
|
|
super();
|
|
this.name1 = name1;
|
|
this.name2 = name2;
|
|
}
|
|
}
|
|
|
|
try {
|
|
let err = new MyError("name1", "name2")
|
|
err.code = "code"
|
|
throw err
|
|
} catch ({name1, name2, code, ...rest}) {
|
|
console.log(name1, name2, code, rest)
|
|
}
|
|
|
|
for (let [, , t] = simple_array; t < 10; t++) {
|
|
// console.log(t)
|
|
}
|
|
for (let {num} = obj; num < 11; num++) {
|
|
// console.log(num)
|
|
} |