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/**

* Copyright (c) Facebook, Inc. and its affiliates.

*

* This source code is licensed under the MIT license found in the

* LICENSE file in the root directory of this source tree.

*

* @flow

*/

'use strict';

function evalToString(ast /* : Object */) /* : string */ {

switch (ast.type) {

case 'StringLiteral':

return ast.value;

case 'BinaryExpression': // `+`

if (ast.operator !== '+') {

throw new Error('Unsupported binary operator ' + ast.operator);

}

return evalToString(ast.left) + evalToString(ast.right);

default:

throw new Error('Unsupported type ' + ast.type);

}

}

module.exports = evalToString;