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/**
* Copyright 2013-2015, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
'use strict';
/**
* Use invariant() to assert state which your program assumes to be true.
*
* Provide sprintf-style format (only %s is supported) and arguments
* to provide information about what broke and what you were
* expecting.
*
* The invariant message will be stripped in production, but the invariant
* will remain to ensure logic does not differ in production.
*/
var NODE_ENV = process.env.NODE_ENV;
var invariant = function(condition, format, a, b, c, d, e, f) {
if (NODE_ENV !== 'production') {
if (format === undefined) {
throw new Error('invariant requires an error message argument');
}
}
if (!condition) {
var error;
if (format === undefined) {
error = new Error(
'Minified exception occurred; use the non-minified dev environment ' +
'for the full error message and additional helpful warnings.'
);
} else {
var args = [a, b, c, d, e, f];
var argIndex = 0;
error = new Error(
format.replace(/%s/g, function() { return args[argIndex++]; })
);
error.name = 'Invariant Violation';
}
error.framesToPop = 1; // we don't care about invariant's own frame
throw error;
}
};
module.exports = invariant;
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