33 lines
950 B
JavaScript
Executable File
33 lines
950 B
JavaScript
Executable File
'use strict';
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.default = extractValueFromUpdateExpression;
|
|
/**
|
|
* 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.
|
|
*/
|
|
function extractValueFromUpdateExpression(value) {
|
|
// eslint-disable-next-line global-require
|
|
var getValue = require('.').default;
|
|
var operator = value.operator,
|
|
argument = value.argument,
|
|
prefix = value.prefix;
|
|
|
|
|
|
var 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;
|
|
}
|
|
} |