lexer_lookahead.h

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// 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
struct rcl_lexer_lookahead2_impl_t;

typedef struct rcl_lexer_lookahead2_t
{
  struct 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_