1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef LIBTEXTCLASSIFIER_UTILS_STRINGS_SUBSTITUTE_H_ 18 #define LIBTEXTCLASSIFIER_UTILS_STRINGS_SUBSTITUTE_H_ 19 20 #include <string> 21 #include <vector> 22 23 #include "utils/strings/stringpiece.h" 24 25 namespace libtextclassifier3 { 26 namespace strings { 27 28 // Formats a string with argument-binding. 29 // Uses a format string that contains positional identifiers indicated by a 30 // dollar sign ($) and a signle digit positional id to indicate which 31 // substitution arguments to use at that location within the format string. 32 // A '$$' sequence in the format string means output a literal '$' character. 33 // Returns whether the substitution was successful. 34 bool Substitute(const StringPiece format, const std::vector<StringPiece>& args, 35 std::string* output); 36 37 std::string Substitute(const StringPiece format, 38 const std::vector<StringPiece>& args); 39 40 } // namespace strings 41 } // namespace libtextclassifier3 42 43 #endif // LIBTEXTCLASSIFIER_UTILS_STRINGS_SUBSTITUTE_H_ 44
