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Support parsing async modifiers for functions. (#3460)

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Only parsing is implemented, so the async functions currently behave
like normal function except they return with a resolved Promise object
when the function is terminated correctly.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2019-12-20 09:55:41 +01:00
committed by GitHub
parent 2a29b72a83
commit 8cb2be6001
22 changed files with 873 additions and 234 deletions
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jerry-core/parser/js/js-parser-internal.h
+17 -13
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@@ -61,22 +61,23 @@ typedef enum
PARSER_INSIDE_BLOCK = (1u << 12), /**< script has a lexical environment for let and const */
PARSER_IS_ARROW_FUNCTION = (1u << 13), /**< an arrow function is parsed */
PARSER_IS_GENERATOR_FUNCTION = (1u << 14), /**< a generator function is parsed */
PARSER_DISALLOW_YIELD = (1u << 15), /**< throw SyntaxError for yield expression */
PARSER_FUNCTION_HAS_NON_SIMPLE_PARAM = (1u << 16), /**< function has a non simple parameter */
PARSER_FUNCTION_HAS_REST_PARAM = (1u << 17), /**< function has rest parameter */
PARSER_IS_ASYNC_FUNCTION = (1u << 15), /**< an async function is parsed */
PARSER_DISALLOW_YIELD = (1u << 16), /**< throw SyntaxError for yield expression */
PARSER_FUNCTION_HAS_NON_SIMPLE_PARAM = (1u << 17), /**< function has a non simple parameter */
PARSER_FUNCTION_HAS_REST_PARAM = (1u << 18), /**< function has rest parameter */
/* These four status flags must be in this order. See PARSER_CLASS_PARSE_OPTS_OFFSET. */
PARSER_CLASS_CONSTRUCTOR = (1u << 18), /**< a class constructor is parsed (this value must be kept in
PARSER_CLASS_CONSTRUCTOR = (1u << 19), /**< a class constructor is parsed (this value must be kept in
* in sync with ECMA_PARSE_CLASS_CONSTRUCTOR) */
PARSER_CLASS_HAS_SUPER = (1u << 19), /**< class has super reference */
PARSER_CLASS_IMPLICIT_SUPER = (1u << 20), /**< class has implicit parent class */
PARSER_CLASS_STATIC_FUNCTION = (1u << 21), /**< this function is a static class method */
PARSER_CLASS_SUPER_PROP_REFERENCE = (1u << 22), /**< super property call or assignment */
PARSER_IS_EVAL = (1u << 23), /**< eval code */
PARSER_CLASS_HAS_SUPER = (1u << 20), /**< class has super reference */
PARSER_CLASS_IMPLICIT_SUPER = (1u << 21), /**< class has implicit parent class */
PARSER_CLASS_STATIC_FUNCTION = (1u << 22), /**< this function is a static class method */
PARSER_CLASS_SUPER_PROP_REFERENCE = (1u << 23), /**< super property call or assignment */
PARSER_IS_EVAL = (1u << 24), /**< eval code */
#endif /* ENABLED (JERRY_ES2015) */
#if ENABLED (JERRY_ES2015_MODULE_SYSTEM)
PARSER_IS_MODULE = (1u << 24), /**< an export / import keyword is encountered */
PARSER_MODULE_DEFAULT_CLASS_OR_FUNC = (1u << 25), /**< parsing a function or class default export */
PARSER_MODULE_STORE_IDENT = (1u << 26), /**< store identifier of the current export statement */
PARSER_IS_MODULE = (1u << 25), /**< an export / import keyword is encountered */
PARSER_MODULE_DEFAULT_CLASS_OR_FUNC = (1u << 26), /**< parsing a function or class default export */
PARSER_MODULE_STORE_IDENT = (1u << 27), /**< store identifier of the current export statement */
#endif /* ENABLED (JERRY_ES2015_MODULE_SYSTEM) */
PARSER_HAS_LATE_LIT_INIT = (1u << 30), /**< there are identifier or string literals which construction
* is postponed after the local parser data is freed */
@@ -635,10 +636,12 @@ void lexer_skip_empty_statements (parser_context_t *context_p);
bool lexer_check_arrow (parser_context_t *context_p);
bool lexer_check_arrow_param (parser_context_t *context_p);
bool lexer_check_yield_no_arg (parser_context_t *context_p);
bool lexer_consume_generator (parser_context_t *context_p);
#endif /* ENABLED (JERRY_ES2015) */
void lexer_parse_string (parser_context_t *context_p, lexer_string_options_t opts);
void lexer_expect_identifier (parser_context_t *context_p, uint8_t literal_type);
void lexer_scan_identifier (parser_context_t *context_p, uint32_t ident_opts);
bool lexer_scan_identifier (parser_context_t *context_p);
void lexer_check_property_modifier (parser_context_t *context_p);
void lexer_convert_ident_to_cesu8 (uint8_t *destination_p, const uint8_t *source_p, prop_length_t length);
const uint8_t *lexer_convert_literal_to_chars (parser_context_t *context_p, const lexer_lit_location_t *literal_p,
@@ -660,6 +663,7 @@ bool lexer_string_is_directive (parser_context_t *context_p);
bool lexer_token_is_identifier (parser_context_t *context_p, const char *identifier_p,
size_t identifier_length);
bool lexer_token_is_let (parser_context_t *context_p);
bool lexer_token_is_async (parser_context_t *context_p);
#endif /* ENABLED (JERRY_ES2015) */
bool lexer_compare_literal_to_string (parser_context_t *context_p, const char *string_p, size_t string_length);
uint8_t lexer_convert_binary_lvalue_token_to_binary (uint8_t token);