.. _program_listing_file_include_rcl_lexer_lookahead.h:

Program Listing for File lexer_lookahead.h
==========================================

|exhale_lsh| :ref:`Return to documentation for file <file_include_rcl_lexer_lookahead.h>` (``include/rcl/lexer_lookahead.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // Copyright 2018 Open Source Robotics Foundation, Inc.
   //
   // 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.
   
   
   #ifndef RCL__LEXER_LOOKAHEAD_H_
   #define RCL__LEXER_LOOKAHEAD_H_
   
   #include <stddef.h>
   
   #include "rcl/allocator.h"
   #include "rcl/lexer.h"
   #include "rcl/macros.h"
   #include "rcl/types.h"
   #include "rcl/visibility_control.h"
   
   #if __cplusplus
   extern "C"
   {
   #endif
   
   // Forward declaration
   typedef struct rcl_lexer_lookahead2_impl_s rcl_lexer_lookahead2_impl_t;
   
   typedef struct rcl_lexer_lookahead2_s
   {
     rcl_lexer_lookahead2_impl_t * impl;
   } rcl_lexer_lookahead2_t;
   
   
   RCL_PUBLIC
   RCL_WARN_UNUSED
   rcl_lexer_lookahead2_t
   rcl_get_zero_initialized_lexer_lookahead2();
   
   
   RCL_PUBLIC
   RCL_WARN_UNUSED
   rcl_ret_t
   rcl_lexer_lookahead2_init(
     rcl_lexer_lookahead2_t * buffer,
     const char * text,
     rcl_allocator_t allocator);
   
   
   RCL_PUBLIC
   RCL_WARN_UNUSED
   rcl_ret_t
   rcl_lexer_lookahead2_fini(
     rcl_lexer_lookahead2_t * buffer);
   
   
   RCL_PUBLIC
   RCL_WARN_UNUSED
   rcl_ret_t
   rcl_lexer_lookahead2_peek(
     rcl_lexer_lookahead2_t * buffer,
     rcl_lexeme_t * next_type);
   
   
   RCL_PUBLIC
   RCL_WARN_UNUSED
   rcl_ret_t
   rcl_lexer_lookahead2_peek2(
     rcl_lexer_lookahead2_t * buffer,
     rcl_lexeme_t * next_type1,
     rcl_lexeme_t * next_type2);
   
   
   RCL_PUBLIC
   RCL_WARN_UNUSED
   rcl_ret_t
   rcl_lexer_lookahead2_accept(
     rcl_lexer_lookahead2_t * buffer,
     const char ** lexeme_text,
     size_t * lexeme_text_length);
   
   
   RCL_PUBLIC
   RCL_WARN_UNUSED
   rcl_ret_t
   rcl_lexer_lookahead2_expect(
     rcl_lexer_lookahead2_t * buffer,
     rcl_lexeme_t type,
     const char ** lexeme_text,
     size_t * lexeme_text_length);
   
   
   RCL_PUBLIC
   RCL_WARN_UNUSED
   const char *
   rcl_lexer_lookahead2_get_text(
     const rcl_lexer_lookahead2_t * buffer);
   
   #if __cplusplus
   }
   #endif
   
   #endif  // RCL__LEXER_LOOKAHEAD_H_