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<h1>
<a href="../../index.html">All files</a> / <a href="index.html">scope/items</a> scopeAliasItem.js
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">import ScopeItem from '../scopeItem';
/**
* References an alias or such to any value. This is used for example in thigns
* like assignments.
*/
export default class ScopeAliasItem extends ScopeItem {
/**
* Creates an alias, an item representing a value. This will store a
* ScopeItem for the instance which it represents. For example an object of
* type `class A {}` would be `ScopeAliasItem(of: A.ref)`
*
* Additionally we'll keep track of variable candidates here. This will be
* verified as the code is generated which will allow us to maintain
* ambiguity for deffered resolution
*
* @param {string} rootId - The root primary identifier of this type.
* @param {ScopeItem[]} candidates - The possible type of the item.
* @param {Node} source - The source expression which the item was declared.
*/
<span class="fstat-no" title="function not covered" > co</span>nstructor(rootId: string, candidates: ScopeItem[], source: Node) {
<span class="cstat-no" title="statement not covered" > super(rootId);</span>
/**
* All the possible types the alias can have. The generator will resolve
* ambiguity between multiple but if they are 0 we can do nothing.
*
* Make sure to bind to the reference for type updating.
*
* @type {ScopeItem[]}
*/
<span class="cstat-no" title="statement not covered" > this.candidates = candidates;</span>
/**
* `true` if the type ever escapes the scope this means it is places
* within a closure, or is ever returned. This is needed for memory
* allocation as we don't want to RC every time. Instead we'll copy the
* mem ref. to a object & unwrap if applicable. We can inline too but
* avoiding branch analysis and domain masking is probably more complex
* then initally is needed.
*
* @type {boolean}
*/
<span class="cstat-no" title="statement not covered" > this.escapesScope = false;</span>
/**
* The source node in which this item was declared. Do note that this
* might now always be the same but you can assume it will have type
* info e.g. `.typeCandidates`.
*
* @type {Node}
*/
<span class="cstat-no" title="statement not covered" > this.source = source;</span>
}
/** @override */
<span class="fstat-no" title="function not covered" > eq</span>ual(ref: ScopeItem): boolean {
<span class="cstat-no" title="statement not covered" > return ref instanceof ScopeAliasItem && ref.rootId === this.rootId;</span>
}
/** @return {string} */
<span class="fstat-no" title="function not covered" > to</span>String() {
<span class="cstat-no" title="statement not covered" > return `${this.rootId}: ${this.candidates ? this.candidates.join("\n") : "n/a"}`;</span>
}
}
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