Current File : /var/www/html/node_modules/jsx-ast-utils/src/values/expressions/UpdateExpression.js
/**
* Extractor function for an UpdateExpression type value node.
* An update expression is an expression with an update operator.
* For example, foo++ will evaluate to foo + 1.
*
* @param - value - AST Value object with type `UpdateExpression`
* @returns - The extracted value converted to correct type.
*/
export default function extractValueFromUpdateExpression(value) {
// eslint-disable-next-line global-require
const getValue = require('.').default;
const { operator, argument, prefix } = value;
let val = getValue(argument);
switch (operator) {
case '++':
return prefix ? ++val : val++; // eslint-disable-line no-plusplus
case '--':
return prefix ? --val : val--; // eslint-disable-line no-plusplus
default:
return undefined;
}
}
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