/**
 * Copyright 2018, OpenCensus Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */ /**
 * Internal utility methods for working with tag keys, tag values, and metric
 * names.
 */ export class StringUtils { param str returns static isPrintableString ( str ) { for ( let i = 0 ; i < str . length ; i ++ ) { const ch = str . charAt ( i ) ; if ( ! StringUtils . isPrintableChar ( ch ) ) { return false ; } } return true ; } param ch returns static isPrintableChar ( ch ) { return ch >= ' ' && ch <= '~' ; } }