introduce fce_interfaces

crates/fce_wit_interfaces/src/wit_parser/custom.rs

@@ -0,0 +1,33 @@
+/*
+ * 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.
+ */
+
+use std::borrow::Cow;
+use walrus::{CustomSection, IdsToIndices};
+
+pub const WIT_SECTION_NAME: &str = "interface-types";
+
+#[derive(Debug, Clone)]
+pub(crate) struct WITCustom(pub Vec<u8>);
+
+impl CustomSection for WITCustom {
+    fn name(&self) -> &str {
+        WIT_SECTION_NAME
+    }
+
+    fn data(&self, _ids_to_indices: &IdsToIndices) -> Cow<[u8]> {
+        Cow::Borrowed(&self.0)
+    }
+}