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