/* Copyright 2005 Garrett Rooney.
 *
 * 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 TMPL_LEXER_H
#define TMPL_LEXER_H

#include "etl_stream.h"

#include "parser.h"

/* A lexer for the ETL language. */
typedef struct etl_template_lexer_t etl_template_lexer_t;

#define ETL_TMPL_TOK_EOI 47 /* sufficiently big... */

/* A token within an ETL file. */
typedef struct {
  int type;   /* The actual type of token this is. */
  char *data; /* The underlying data associated with this token. */
  int line;   /* The line this token originated from. */
} etl_token_t;

/* Return a lexer that will scan the contents of BB, allocated in POOL. */
etl_template_lexer_t *
etl_template_lexer_create(etl_stream_t *stream);

void etl_template_lexer_destroy(etl_template_lexer_t *l);

/* Scan forward to find the next token in LEXER, returning it in *TOK */
etl_error_t *
etl_template_lexer_scan(etl_token_t **tok,
                        etl_template_lexer_t *lexer);

void etl_template_token_destroy(etl_token_t *tok);

#endif /* TMPL_LEXER_H */