Implement tagged template literals (#3456)

Missing features: snapshot support JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
2019-12-19 19:10:45 +01:00
parent 7bfbc701d8
commit 9596a7e1d6
28 changed files with 1229 additions and 314 deletions
@@ -112,6 +112,159 @@ ecma_builtin_string_object_from_char_code (ecma_value_t this_arg, /**< 'this' ar

 #if ENABLED (JERRY_ES2015)

+/**
+ * The String object's 'raw' routine
+ *
+ * See also:
+ *          ECMA-262 v6, 21.1.2.4
+ *
+ * @return ecma value
+ *         Returned value must be freed with ecma_free_value.
+ */
+static ecma_value_t
+ecma_builtin_string_object_raw (ecma_value_t this_arg, /**< 'this' argument */
+                                const ecma_value_t args[], /**< arguments list */
+                                ecma_length_t args_number) /**< number of arguments */
+{
+  JERRY_UNUSED (this_arg);
+
+  /* 1 - 2. */
+  const ecma_value_t *substitutions;
+  ecma_length_t number_of_substitutions;
+
+  if (args_number > 1)
+  {
+    substitutions = args + 1;
+    number_of_substitutions = args_number - 1;
+  }
+  else
+  {
+    substitutions = NULL;
+    number_of_substitutions = 0;
+  }
+
+  /* 3. */
+  ecma_value_t template = args_number > 0 ? args[0] : ECMA_VALUE_UNDEFINED;
+
+  ecma_value_t cooked = ecma_op_to_object (template);
+
+  /* 4. */
+  if (ECMA_IS_VALUE_ERROR (cooked))
+  {
+    return cooked;
+  }
+
+  ecma_object_t *cooked_obj_p = ecma_get_object_from_value (cooked);
+
+  /* 5. */
+  ecma_value_t raw = ecma_op_object_get_by_magic_id (cooked_obj_p, LIT_MAGIC_STRING_RAW);
+
+  ecma_deref_object (cooked_obj_p);
+
+  if (ECMA_IS_VALUE_ERROR (raw))
+  {
+    return raw;
+  }
+
+  ecma_value_t raw_obj = ecma_op_to_object (raw);
+
+  /* 6. */
+  if (ECMA_IS_VALUE_ERROR (raw_obj))
+  {
+    ecma_free_value (raw);
+    return raw_obj;
+  }
+
+  ecma_object_t *raw_obj_p = ecma_get_object_from_value (raw_obj);
+
+  ecma_value_t ret_value = ECMA_VALUE_ERROR;
+
+  /* 7 - 8. */
+  uint32_t literal_segments;
+  if (ECMA_IS_VALUE_ERROR (ecma_op_object_get_length (raw_obj_p, &literal_segments)))
+  {
+    goto cleanup;
+  }
+
+  /* 9. */
+  if (literal_segments == 0)
+  {
+    ret_value = ecma_make_magic_string_value (LIT_MAGIC_STRING__EMPTY);
+    goto cleanup;
+  }
+
+  /* 10. */
+  ecma_stringbuilder_t builder = ecma_stringbuilder_create ();
+
+  /* 11. */
+  uint32_t next_index = 0;
+
+  /* 12. */
+  while (true)
+  {
+    /* 12.a,b */
+    ecma_value_t next_seg = ecma_op_object_get_by_uint32_index (raw_obj_p, next_index);
+
+    if (ECMA_IS_VALUE_ERROR (next_seg))
+    {
+      goto builder_cleanup;
+    }
+
+    ecma_string_t *next_seg_srt_p = ecma_op_to_string (next_seg);
+
+    /* 12.c */
+    if (JERRY_UNLIKELY (next_seg_srt_p == NULL))
+    {
+      ecma_free_value (next_seg);
+      goto builder_cleanup;
+    }
+
+    /* 12.d */
+    ecma_stringbuilder_append (&builder, next_seg_srt_p);
+
+    ecma_deref_ecma_string (next_seg_srt_p);
+    ecma_free_value (next_seg);
+
+    /* 12.e */
+    if (next_index + 1 == literal_segments)
+    {
+      ret_value = ecma_make_string_value (ecma_stringbuilder_finalize (&builder));
+      goto cleanup;
+    }
+
+    /* 12.f-g */
+    if (next_index >= number_of_substitutions)
+    {
+      continue;
+    }
+
+    /* 12.h */
+    ecma_string_t *next_sub_p = ecma_op_to_string (substitutions[next_index]);
+
+    /* 12.i */
+    if (JERRY_UNLIKELY (next_sub_p == NULL))
+    {
+      goto builder_cleanup;
+    }
+
+    /* 12.j */
+    ecma_stringbuilder_append (&builder, next_sub_p);
+    ecma_deref_ecma_string (next_sub_p);
+
+    /* 12.k */
+    next_index++;
+  }
+
+builder_cleanup:
+  ecma_stringbuilder_destroy (&builder);
+
+cleanup:
+  ecma_deref_object (raw_obj_p);
+  ecma_free_value (raw);
+
+  return ret_value;
+} /* ecma_builtin_string_object_raw */
+
 /**
 * The String object's 'fromCodePoint' routine
 *
@@ -43,6 +43,7 @@ ROUTINE (LIT_MAGIC_STRING_FROM_CHAR_CODE_UL, ecma_builtin_string_object_from_cha

 #if ENABLED (JERRY_ES2015)
 ROUTINE (LIT_MAGIC_STRING_FROM_CODE_POINT_UL, ecma_builtin_string_object_from_code_point, NON_FIXED, 1)
+ROUTINE (LIT_MAGIC_STRING_RAW, ecma_builtin_string_object_raw, NON_FIXED, 1)
 #endif /* ENABLED (JERRY_ES2015) */

 #endif /* ENABLED (JERRY_BUILTIN_STRING) */