Implement numeric-separator (#4158)

JerryScript-DCO-1.0-Signed-off-by: bence gabor kis kisbg@inf.u-szeged.hu

jerry-core/ecma/base/ecma-helpers.h

@@ -96,6 +96,11 @@ typedef enum
   ECMA_STRING_FLAG_MUST_BE_FREED = (1 << 3), /**< The returned buffer must be freed */
 } ecma_string_flag_t;
 
+/**
+ * Underscore is ignored when this option is passed.
+ */
+ #define ECMA_CONVERSION_ALLOW_UNDERSCORE 0x1
+
 /**
  * Convert ecma-string's contents to a cesu-8 string and put it into a buffer.
  */
@@ -525,7 +530,8 @@ ecma_native_pointer_t *ecma_get_native_pointer_value (ecma_object_t *obj_p, void
 bool ecma_delete_native_pointer_property (ecma_object_t *obj_p, void *info_p);
 
 /* ecma-helpers-conversion.c */
-ecma_number_t ecma_utf8_string_to_number (const lit_utf8_byte_t *str_p, lit_utf8_size_t str_size);
+ecma_number_t ecma_utf8_string_to_number (const lit_utf8_byte_t *str_p, lit_utf8_size_t str_size,
+                                          uint32_t option);
 lit_utf8_size_t ecma_uint32_to_utf8_string (uint32_t value, lit_utf8_byte_t *out_buffer_p, lit_utf8_size_t buffer_size);
 uint32_t ecma_number_to_uint32 (ecma_number_t num);
 int32_t ecma_number_to_int32 (ecma_number_t num);