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28 lines
784 B
JavaScript
28 lines
784 B
JavaScript
/**
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* Copyright (c) 2013-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @flow
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*/
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'use strict';
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function evalToString(ast/* : Object */)/* : string */ {
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switch (ast.type) {
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case 'StringLiteral':
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return ast.value;
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case 'BinaryExpression': // `+`
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if (ast.operator !== '+') {
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throw new Error('Unsupported binary operator ' + ast.operator);
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}
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return evalToString(ast.left) + evalToString(ast.right);
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default:
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throw new Error('Unsupported type ' + ast.type);
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}
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}
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module.exports = evalToString;
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