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what if..

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dcode 2019-03-21 22:46:10 +01:00
parent e57fa14ff9
commit c2ac1a0375
1 changed files with 12 additions and 12 deletions
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24
std/assembly/array.ts
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@ -32,22 +32,22 @@ export class Array<T> extends ArrayBufferView {
return builtin_isArray(value) && value !== null; return builtin_isArray(value) && value !== null;
} }
static create<T>(capacity: i32): Array<T> {
if (<u32>capacity > <u32>MAX_BYTELENGTH >>> alignof<T>()) throw new RangeError("Invalid length");
var buffer = new ArrayBuffer(capacity = capacity << alignof<T>());
var out = REGISTER<Array<T>>(ALLOCATE(offsetof<Array<T>>()));
out.data = buffer; // links
out.dataStart = changetype<usize>(buffer);
out.dataLength = capacity;
out.length_ = 0;
return out;
}
constructor(length: i32 = 0) { constructor(length: i32 = 0) {
super(length, alignof<T>()); super(length, alignof<T>());
if (isReference<T>()) { if (isReference<T>()) {
if (!isNullable<T>()) { if (!isNullable<T>()) {
let cur = this.dataStart; if (length) throw new Error("T must be nullable if length > 0");
let end = cur + (<usize>length << alignof<T>());
while (cur < end) {
// TODO: probably a common reason for complaints of T not having a default ctor. what if
// the array ctor would also take default arguments, like `new Array<Ref>(10, ...args)`?
store<T>(cur,
isString<T>()
? "" // no need to instantiate
: RETAIN<T,this>(instantiate<T>(), this)
);
cur += sizeof<T>();
}
} }
} }
this.length_ = length; this.length_ = length;