Decouple log targets to a separate crate (#152)

crates/air-lib/air-parser/src/parser/lexer/utils.rs

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2020 Fluence Labs Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+pub(super) fn is_air_alphanumeric(ch: char) -> bool {
+    ch.is_alphanumeric() || ch == '_' || ch == '-'
+}
+
+pub(super) fn is_json_path_allowed_char(ch: char) -> bool {
+    // we don't have spec for json path now, but some possible example could be found here
+    // https://packagist.org/packages/softcreatr/jsonpath
+
+    // good old switch faster here than hash set
+    match ch {
+        '$' => true,
+        '@' => true,
+        '[' => true,
+        ']' => true,
+        '(' => true,
+        ')' => true,
+        ':' => true,
+        '?' => true,
+        '.' => true,
+        '*' => true,
+        ',' => true,
+        '"' => true,
+        '\'' => true,
+        ch => is_air_alphanumeric(ch),
+    }
+}