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Implement the core of the generator functions. (#3368)

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Some things are missing:
 - yield* support
 - generator definition in object literal
 - the hidden GeneratorFunction

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2019-11-28 11:54:27 +01:00
committed by Dániel Bátyai
parent 14e95a4775
commit 110f75c99d
35 changed files with 1535 additions and 85 deletions
Download Patch File Download Diff File Expand all files Collapse all files
jerry-core/parser/js/js-parser-expr.c
+43
View File
@@ -983,6 +983,22 @@ parser_parse_function_expression (parser_context_t *context_p, /**< context */
parser_line_counter_t debugger_column = context_p->token.column;
#endif /* ENABLED (JERRY_DEBUGGER) */
#if ENABLED (JERRY_ES2015)
uint32_t parent_status_flags = context_p->status_flags;
if (lexer_check_next_character (context_p, LIT_CHAR_ASTERISK))
{
/* The name of the function cannot be yield. */
context_p->status_flags |= PARSER_IS_GENERATOR_FUNCTION | PARSER_DISALLOW_YIELD;
status_flags |= PARSER_IS_GENERATOR_FUNCTION | PARSER_DISALLOW_YIELD;
lexer_consume_next_character (context_p);
}
else
{
context_p->status_flags &= (uint32_t) ~(PARSER_IS_GENERATOR_FUNCTION | PARSER_DISALLOW_YIELD);
}
#endif /* ENABLED (JERRY_ES2015) */
if (!lexer_check_next_character (context_p, LIT_CHAR_LEFT_PAREN))
{
lexer_next_token (context_p);
@@ -1019,6 +1035,10 @@ parser_parse_function_expression (parser_context_t *context_p, /**< context */
function_name_index = context_p->lit_object.index;
}
#if ENABLED (JERRY_ES2015)
context_p->status_flags = parent_status_flags;
#endif /* ENABLED (JERRY_ES2015) */
}
if (context_p->last_cbc_opcode == CBC_PUSH_LITERAL)
@@ -1513,6 +1533,29 @@ parser_parse_unary_expression (parser_context_t *context_p, /**< context */
PARSER_IS_FUNCTION | PARSER_IS_ARROW_FUNCTION | PARSER_ARROW_PARSE_ARGS);
return parser_abort_parsing_after_arrow (context_p);
}
case LEXER_KEYW_YIELD:
{
JERRY_ASSERT ((context_p->status_flags & PARSER_IS_GENERATOR_FUNCTION)
&& !(context_p->status_flags & PARSER_DISALLOW_YIELD));
parser_check_assignment_expr (context_p);
lexer_next_token (context_p);
if (!lexer_check_yield_no_arg (context_p))
{
parser_parse_expression (context_p, PARSE_EXPR_NO_COMMA);
}
else
{
parser_emit_cbc (context_p, CBC_PUSH_UNDEFINED);
}
parser_emit_cbc_ext (context_p, CBC_EXT_YIELD);
parser_emit_cbc_ext (context_p, CBC_EXT_CONTINUE_EXEC);
return (context_p->token.type != LEXER_RIGHT_PAREN
&& context_p->token.type != LEXER_COMMA);
}
#endif /* ENABLED (JERRY_ES2015) */
default:
{