YourWishes/jerryscript
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Implement the core of let/const statement. (#3239)

Browse Source 
This patch implements the core part of let/const statements. Redeclarations are correctly
detected and separate contexts are correctly created for these statements. Register
optimizations are also emplyed whenever possible.

Lots of features are still missing:
 - checking the var statements in eval
 - const are treated as lets
 - single statement checks are missing
 - export declarations are exported as vars, let/const export is not supported

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2019-10-25 18:08:10 +02:00
committed by Dániel Bátyai
parent 4b352758c1
commit 3d797b8836
33 changed files with 1997 additions and 217 deletions
Download Patch File Download Diff File Expand all files Collapse all files
jerry-core/parser/js/js-scanner-internal.h
+36
View File
@@ -45,8 +45,28 @@ typedef enum
SCANNER_LITERAL_IS_VAR = (1 << 2), /**< literal is var */
SCANNER_LITERAL_IS_FUNC = (1 << 3), /**< literal is function */
SCANNER_LITERAL_NO_REG = (1 << 4), /**< literal cannot be stored in register */
#if ENABLED (JERRY_ES2015)
SCANNER_LITERAL_IS_LET = (1 << 5), /**< literal is let */
SCANNER_LITERAL_IS_CONST = (1 << 6), /**< literal is const */
#endif /* ENABLED (JERRY_ES2015) */
} scanner_literal_type_flags_t;
#if ENABLED (JERRY_ES2015)
/**
* Tells whether the literal is let or const declaration.
*/
#define SCANNER_LITERAL_IS_LET_OR_CONST (SCANNER_LITERAL_IS_LET | SCANNER_LITERAL_IS_CONST)
#else /* !ENABLED (JERRY_ES2015) */
/**
* No literal is let or const declaration in ECMAScript 5.1.
*/
#define SCANNER_LITERAL_IS_LET_OR_CONST 0
#endif /* ENABLED (JERRY_ES2015) */
/**
* For statement descriptor.
*/
@@ -112,6 +132,14 @@ struct scanner_context_t
scanner_info_t *end_arguments_p; /**< position of end arguments */
};
void scanner_raise_error (parser_context_t *context_p);
#if ENABLED (JERRY_ES2015)
void scanner_raise_redeclaration_error (parser_context_t *context_p);
#endif /* ENABLED (JERRY_ES2015) */
void *scanner_malloc (parser_context_t *context_p, size_t size);
void scanner_free (void *ptr, size_t size);
size_t scanner_get_stream_size (scanner_info_t *info_p, size_t size);
scanner_info_t *scanner_insert_info (parser_context_t *context_p, const uint8_t *source_p, size_t size);
scanner_info_t *scanner_insert_info_before (parser_context_t *context_p, const uint8_t *source_p,
@@ -119,14 +147,22 @@ scanner_info_t *scanner_insert_info_before (parser_context_t *context_p, const u
scanner_literal_pool_t *scanner_push_literal_pool (parser_context_t *context_p, scanner_context_t *scanner_context_p,
uint16_t status_flags);
void scanner_pop_literal_pool (parser_context_t *context_p, scanner_context_t *scanner_context_p);
#if ENABLED (JERRY_ES2015)
void scanner_construct_global_block (parser_context_t *context_p, scanner_context_t *scanner_context_p);
#endif /* ENABLED (JERRY_ES2015) */
void scanner_filter_arguments (parser_context_t *context_p, scanner_context_t *scanner_context_p);
lexer_lit_location_t *scanner_add_custom_literal (parser_context_t *context_p, scanner_literal_pool_t *literal_pool_p,
const lexer_lit_location_t *literal_location_p);
lexer_lit_location_t *scanner_add_literal (parser_context_t *context_p, scanner_context_t *scanner_context_p);
void scanner_add_reference (parser_context_t *context_p, scanner_context_t *scanner_context_p);
void scanner_append_argument (parser_context_t *context_p, scanner_context_t *scanner_context_p);
#if ENABLED (JERRY_ES2015)
void scanner_detect_invalid_var (parser_context_t *context_p, scanner_context_t *scanner_context_p,
lexer_lit_location_t *var_literal_p);
#endif /* ENABLED (JERRY_ES2015) */
void scanner_detect_eval_call (parser_context_t *context_p, scanner_context_t *scanner_context_p);
/**
* @}
* @}