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https://github.com/jerryscript-project/jerryscript.git
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The scanner was an on-demand tool of the parser, which was triggered by certain statements. After the rework, the scanner runs only once, and collects all information. This information is passed to the parser. JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef JS_SCANNER_H
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#define JS_SCANNER_H
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/** \addtogroup parser Parser
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* @{
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*
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* \addtogroup jsparser JavaScript
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* @{
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*
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* \addtogroup jsparser_scanner Scanner
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* @{
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*/
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/**
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* Allowed types for scanner_info_t structures.
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*/
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typedef enum
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{
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SCANNER_TYPE_END, /**< mark the last info block */
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SCANNER_TYPE_WHILE, /**< while statement */
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SCANNER_TYPE_FOR, /**< for statement */
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SCANNER_TYPE_FOR_IN, /**< for-in statement */
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#if ENABLED (JERRY_ES2015_FOR_OF)
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SCANNER_TYPE_FOR_OF, /**< for-of statement */
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#endif /* ENABLED (JERRY_ES2015_FOR_OF) */
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SCANNER_TYPE_SWITCH, /**< switch statement */
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SCANNER_TYPE_CASE, /**< case statement */
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#if ENABLED (JERRY_ES2015_ARROW_FUNCTION)
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SCANNER_TYPE_ARROW, /**< arrow function */
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#endif /* ENABLED (JERRY_ES2015_ARROW_FUNCTION) */
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} scanner_info_type_t;
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/**
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* Source code location which can be used to change the position of parsing.
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*/
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typedef struct
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{
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const uint8_t *source_p; /**< next source byte */
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parser_line_counter_t line; /**< token start line */
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parser_line_counter_t column; /**< token start column */
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} scanner_location_t;
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/**
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* Scanner info blocks which provides information for the parser.
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*/
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typedef struct scanner_info_t
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{
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struct scanner_info_t *next_p; /**< next info structure */
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const uint8_t *source_p; /**< triggering position of this scanner info */
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uint8_t type; /**< type of the scanner info */
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} scanner_info_t;
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/**
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* Scanner info extended with a location.
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*/
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typedef struct
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{
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scanner_info_t info; /**< header */
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scanner_location_t location; /**< location */
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} scanner_location_info_t;
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/**
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* Scanner info for "for" statements.
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*/
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typedef struct
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{
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scanner_info_t info; /**< header */
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scanner_location_t expression_location; /**< location of expression start */
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scanner_location_t end_location; /**< location of expression end */
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} scanner_for_info_t;
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/**
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* Case statement list for scanner_switch_info_t structure.
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*/
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typedef struct scanner_case_info_t
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{
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struct scanner_case_info_t *next_p; /**< next case statement info */
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scanner_location_t location; /**< location of case statement */
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} scanner_case_info_t;
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/**
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* Scanner info for "switch" statements.
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*/
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typedef struct
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{
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scanner_info_t info; /**< header */
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scanner_case_info_t *case_p; /**< list of switch cases */
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} scanner_switch_info_t;
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/**
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* @}
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* @}
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* @}
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*/
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#endif /* !JS_SCANNER_H */
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