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6085716f8c
Removed the `Tag` template parameter from `ScaffoldingConverter`. It was totally unused. Updated UniFFITypeError to update it's message as `addItemDescriptionPart` is called. 1897266 made the messages more correct in some cases, but we lost the field name that generated the type error in the process. This new code should work in all casse. Updating the message has some runtime cost, but we shouldn't be generating lots of UniFFITypeErrors in the first place. Differential Revision: https://phabricator.services.mozilla.com/D211928
42 lines
1.5 KiB
JavaScript
42 lines
1.5 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// This JS module contains shared functionality for the generated UniFFI JS
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// code.
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// TypeError for UniFFI calls
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//
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// This extends TypeError to add support for recording a nice description of
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// the item that fails the type check. This is especially useful for invalid
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// values nested in objects/arrays/maps, etc.
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//
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// To accomplish this, the FfiConverter.checkType methods of records, arrays,
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// maps, etc. catch UniFFITypeError, call `addItemDescriptionPart()` with a
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// string representing the child item, then re-raise the exception. We then
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// join all the parts together, in reverse order, to create item description
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// strings like `foo.bar[123]["key"]`
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export class UniFFITypeError extends TypeError {
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constructor(reason) {
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// our `message` getter isn't invoked in all cases, so we supply a default
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// to the `TypeError` constructor.
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super(reason);
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this.reason = reason;
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this.itemDescriptionParts = [];
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}
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addItemDescriptionPart(part) {
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this.itemDescriptionParts.push(part);
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this.updateMessage();
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}
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itemDescription() {
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const itemDescriptionParts = [...this.itemDescriptionParts];
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itemDescriptionParts.reverse();
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return itemDescriptionParts.join("");
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}
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updateMessage() {
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this.message = `${this.itemDescription()}: ${this.reason}`;
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}
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}
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