BinaryExpression.js
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/**
* Extractor function for a BinaryExpression type value node.
* A binary expression has a left and right side separated by an operator
* such as `a + b`.
*
* @param - value - AST Value object with type `BinaryExpression`
* @returns - The extracted value converted to correct type.
*/
export default function extractValueFromBinaryExpression(value) {
// eslint-disable-next-line global-require
const getValue = require('./index.js').default;
const { operator, left, right } = value;
const leftVal = getValue(left);
const rightVal = getValue(right);
switch (operator) {
case '==':
return leftVal == rightVal; // eslint-disable-line
case '!=':
return leftVal != rightVal; // eslint-disable-line
case '===':
return leftVal === rightVal;
case '!==':
return leftVal !== rightVal;
case '<':
return leftVal < rightVal;
case '<=':
return leftVal <= rightVal;
case '>':
return leftVal > rightVal;
case '>=':
return leftVal >= rightVal;
case '<<':
return leftVal << rightVal; // eslint-disable-line no-bitwise
case '>>':
return leftVal >> rightVal; // eslint-disable-line no-bitwise
case '>>>':
return leftVal >>> rightVal; // eslint-disable-line no-bitwise
case '+':
return leftVal + rightVal;
case '-':
return leftVal - rightVal;
case '*':
return leftVal * rightVal;
case '/':
return leftVal / rightVal;
case '%':
return leftVal % rightVal;
case '|':
return leftVal | rightVal; // eslint-disable-line no-bitwise
case '^':
return leftVal ^ rightVal; // eslint-disable-line no-bitwise
case '&':
return leftVal & rightVal; // eslint-disable-line no-bitwise
case 'in':
try {
return leftVal in rightVal;
} catch (err) {
return false;
}
case 'instanceof':
if (typeof rightVal !== 'function') {
return false;
}
return leftVal instanceof rightVal;
default:
return undefined;
}
}