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Implement nullish coalescing operator (#3997)

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JerryScript-DCO-1.0-Signed-off-by: bence gabor kis kisbg@inf.u-szeged.hu
This commit is contained in:
kisbg
2020-07-17 15:42:51 +02:00
committed by GitHub
parent f60e16d9d5
commit dfd9d4497a
13 changed files with 323 additions and 72 deletions
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jerry-core/parser/js/js-lexer.c
+18 -1
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@@ -1753,7 +1753,24 @@ lexer_next_token (parser_context_t *context_p) /**< context */
LEXER_ASSIGN_BIT_XOR)
LEXER_TYPE_A_TOKEN (LIT_CHAR_TILDE, LEXER_BIT_NOT);
LEXER_TYPE_A_TOKEN (LIT_CHAR_QUESTION, LEXER_QUESTION_MARK);
case (uint8_t) (LIT_CHAR_QUESTION):
{
#if ENABLED (JERRY_ESNEXT)
if (length >= 2)
{
if (context_p->source_p[1] == (uint8_t) LIT_CHAR_QUESTION)
{
context_p->token.type = LEXER_NULLISH_COALESCING;
length = 2;
break;
}
}
#endif /* ENABLED (JERRY_ESNEXT) */
context_p->token.type = LEXER_QUESTION_MARK;
length = 1;
break;
}
LEXER_TYPE_A_TOKEN (LIT_CHAR_COLON, LEXER_COLON);
case LIT_CHAR_SINGLE_QUOTE: