49 lines
1.6 KiB
JavaScript
49 lines
1.6 KiB
JavaScript
export default function(node, {evaluate, scope}) {
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const binary = (left, right) => {
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switch (node.operator) {
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case '+' : return left + right;
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case '-' : return left - right;
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case '/' : return left / right;
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case '%' : return left % right;
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case '*' : return left * right;
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case '>' : return left > right;
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case '<' : return left < right;
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case 'in' : return left in right;
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case '>=' : return left >= right;
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case '<=' : return left <= right;
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case '**' : return left ** right;
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case '===': return left === right;
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case '!==': return left !== right;
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case '^' : return left ^ right;
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case '&' : return left & right;
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case '|' : return left | right;
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case '>>' : return left >> right;
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case '<<' : return left << right;
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case '>>>': return left >>> right;
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case '==' : return left == right;
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case '!=' : return left != right;
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case '||' : return left || right;
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case '&&' : return left && right;
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case '??' : return (left === null || left === undefined) ? right : left;
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case 'instanceof': return left instanceof right;
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/* v8 ignore next 2 */
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default:
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throw new Error(`operator not implemented: ${node.operator}`);
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}
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};
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const left = evaluate(node.left, {scope});
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const right = evaluate(node.right, {scope});
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if (left.async || right.async) {
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return {
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async: true,
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value: Promise
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.all([left.value, right.value])
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.then(([left, right]) => binary(left, right)),
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};
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}
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return {
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async: false,
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value: binary(left.value, right.value),
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};
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}
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