Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 195x 195x 195x 195x 195x 195x 1x 195x 1x 1x 1x 1x 1x 1x 1x 1x 1x 194x 195x 194x 194x 195x 192x 195x 146x 146x 146x 146x 127x 127x 146x 65x 65x 65x 65x 195x 195x 195x 195x 195x 195x 195x 195x 195x 195x 195x 195x 195x 195x 195x 195x 195x 195x 195x | /** @import { Expression, Node, Pattern, Statement, UpdateExpression } from 'estree' */
/** @import { Context } from '../types' */
import { is_ignored } from '../../../../state.js';
import { object } from '../../../../utils/ast.js';
import * as b from '../../../../utils/builders.js';
/**
* @param {UpdateExpression} node
* @param {Context} context
*/
export function UpdateExpression(node, context) {
const argument = node.argument;
if (
argument.type === 'MemberExpression' &&
argument.object.type === 'ThisExpression' &&
argument.property.type === 'PrivateIdentifier' &&
context.state.private_state.has(argument.property.name)
) {
let fn = '$.update';
if (node.prefix) fn += '_pre';
/** @type {Expression[]} */
const args = [argument];
if (node.operator === '--') {
args.push(b.literal(-1));
}
return b.call(fn, ...args);
}
if (argument.type !== 'Identifier' && argument.type !== 'MemberExpression') {
throw new Error('An impossible state was reached');
}
const left = object(argument);
if (left === null) return context.next();
if (left === argument) {
const transform = context.state.transform;
const update = transform[left.name]?.update;
if (update && Object.hasOwn(transform, left.name)) {
return update(node);
}
}
const assignment = /** @type {Expression} */ (
context.visit(
b.assignment(
node.operator === '++' ? '+=' : '-=',
/** @type {Pattern} */ (argument),
b.literal(1)
)
)
);
const parent = /** @type {Node} */ (context.path.at(-1));
const is_standalone = parent.type === 'ExpressionStatement'; // TODO and possibly others, but not e.g. the `test` of a WhileStatement
const update =
node.prefix || is_standalone
? assignment
: b.binary(node.operator === '++' ? '-' : '+', assignment, b.literal(1));
return is_ignored(node, 'ownership_invalid_mutation')
? b.call('$.skip_ownership_validation', b.thunk(update))
: update;
}
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