Implement binary literal parsing (#3439)

This patch will allow the user to use binary literals starting with 0b or 0B,
these literals will be evaluated in parsing time resulting an integer

Co-authored-by: Robert Fancsik frobert@inf.u-szeged.hu
JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu

jerry-core/lit/lit-char-helpers.c

@@ -293,6 +293,19 @@ lit_char_is_hex_digit (ecma_char_t c) /**< code unit */
               && LEXER_TO_ASCII_LOWERCASE (c) <= LIT_CHAR_ASCII_LOWERCASE_LETTERS_HEX_END));
 } /* lit_char_is_hex_digit */
 
+#if ENABLED (JERRY_ES2015)
+/**
+ * Check if specified character is one of BinaryDigits characters (ECMA-262 v6, 11.8.3)
+ *
+ * @return true / false
+ */
+bool
+lit_char_is_binary_digit (ecma_char_t c) /** code unit */
+{
+  return (c == LIT_CHAR_0 || c == LIT_CHAR_1);
+} /* lit_char_is_binary_digit */
+#endif /* ENABLED (JERRY_ES2015) */
+
 /**
  * Convert a HexDigit character to its numeric value, as defined in ECMA-262 v5, 7.8.3
  *

jerry-core/lit/lit-char-helpers.h

@@ -212,6 +212,9 @@ bool lit_code_point_is_identifier_part (lit_code_point_t code_point);
 bool lit_char_is_octal_digit (ecma_char_t c);
 bool lit_char_is_decimal_digit (ecma_char_t c);
 bool lit_char_is_hex_digit (ecma_char_t c);
+#if ENABLED (JERRY_ES2015)
+bool lit_char_is_binary_digit (ecma_char_t c);
+#endif /* ENABLED (JERRY_ES2015) */
 uint32_t lit_char_hex_to_int (ecma_char_t c);
 size_t lit_code_point_to_cesu8_bytes (uint8_t *dst_p, lit_code_point_t code_point);
 size_t lit_code_point_get_cesu8_length (lit_code_point_t code_point);