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: / var / canvas / node_modules / graphql / type /
Filename : assertName.js
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'use strict';

Object.defineProperty(exports, '__esModule', {
  value: true,
});
exports.assertEnumValueName = assertEnumValueName;
exports.assertName = assertName;

var _devAssert = require('../jsutils/devAssert.js');

var _GraphQLError = require('../error/GraphQLError.js');

var _characterClasses = require('../language/characterClasses.js');

/**
 * Upholds the spec rules about naming.
 */
function assertName(name) {
  name != null || (0, _devAssert.devAssert)(false, 'Must provide name.');
  typeof name === 'string' ||
    (0, _devAssert.devAssert)(false, 'Expected name to be a string.');

  if (name.length === 0) {
    throw new _GraphQLError.GraphQLError(
      'Expected name to be a non-empty string.',
    );
  }

  for (let i = 1; i < name.length; ++i) {
    if (!(0, _characterClasses.isNameContinue)(name.charCodeAt(i))) {
      throw new _GraphQLError.GraphQLError(
        `Names must only contain [_a-zA-Z0-9] but "${name}" does not.`,
      );
    }
  }

  if (!(0, _characterClasses.isNameStart)(name.charCodeAt(0))) {
    throw new _GraphQLError.GraphQLError(
      `Names must start with [_a-zA-Z] but "${name}" does not.`,
    );
  }

  return name;
}
/**
 * Upholds the spec rules about naming enum values.
 *
 * @internal
 */

function assertEnumValueName(name) {
  if (name === 'true' || name === 'false' || name === 'null') {
    throw new _GraphQLError.GraphQLError(
      `Enum values cannot be named: ${name}`,
    );
  }

  return assertName(name);
}