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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
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jerry-core/parser/js/js-lexer.c
+45
View File
@@ -604,6 +604,19 @@ lexer_parse_identifier (parser_context_t *context_p, /**< context */
{
if (JERRY_UNLIKELY (keyword_p->type >= LEXER_FIRST_FUTURE_STRICT_RESERVED_WORD))
{
#if ENABLED (JERRY_ES2015)
if (keyword_p->type == LEXER_KEYW_YIELD && (context_p->status_flags & PARSER_IS_GENERATOR_FUNCTION))
{
if (context_p->status_flags & PARSER_DISALLOW_YIELD)
{
parser_raise_error (context_p, PARSER_ERR_YIELD_NOT_ALLOWED);
}
context_p->token.type = (uint8_t) LEXER_KEYW_YIELD;
break;
}
#endif /* ENABLED (JERRY_ES2015) */
if (context_p->status_flags & PARSER_IS_STRICT)
{
parser_raise_error (context_p, PARSER_ERR_STRICT_IDENT_NOT_ALLOWED);
@@ -1521,6 +1534,38 @@ lexer_check_arrow_param (parser_context_t *context_p) /**< context */
|| context_p->source_p[1] != LIT_CHAR_EQUALS);
} /* lexer_check_arrow_param */
/**
* Checks whether the yield expression has no argument.
*
* @return true if it has no argument
*/
bool
lexer_check_yield_no_arg (parser_context_t *context_p) /**< context */
{
if (context_p->token.flags & LEXER_WAS_NEWLINE)
{
return true;
}
switch (context_p->token.type)
{
case LEXER_RIGHT_BRACE:
case LEXER_RIGHT_PAREN:
case LEXER_RIGHT_SQUARE:
case LEXER_COMMA:
case LEXER_COLON:
case LEXER_SEMICOLON:
case LEXER_EOS:
{
return true;
}
default:
{
return false;
}
}
} /* lexer_check_yield_no_arg */
#endif /* ENABLED (JERRY_ES2015) */
/**