feat: added basic LSP

Author: Zffu

lsp/src/lsp.rs

@@ -0,0 +1,46 @@
+use std::{
+    collections::{HashMap, HashSet},
+    sync::{Arc, Mutex},
+};
+
+use tower_lsp::{
+    Client, LanguageServer,
+    lsp_types::{
+        CompletionOptions, HoverProviderCapability, InitializeParams, InitializeResult,
+        InitializedParams, ServerCapabilities, ServerInfo, TextDocumentSyncCapability,
+        TextDocumentSyncKind,
+    },
+};
+
+#[derive(Debug)]
+pub struct LSPBackend {
+    lsp_client: Client,
+    documents: Arc<Mutex<HashSet<String>>>,
+}
+
+#[tower_lsp::async_trait]
+impl LanguageServer for LSPBackend {
+    async fn initialize(
+        &self,
+        _: InitializeParams,
+    ) -> tower_lsp::jsonrpc::Result<InitializeResult> {
+        Ok(InitializeResult {
+            capabilities: ServerCapabilities {
+                hover_provider: Some(HoverProviderCapability::Simple(true)),
+                completion_provider: Some(CompletionOptions::default()),
+                text_document_sync: Some(TextDocumentSyncCapability::Kind(
+                    TextDocumentSyncKind::FULL,
+                )),
+                ..Default::default()
+            },
+            server_info: Some(ServerInfo {
+                name: "quickfall-lsp".to_string(),
+                version: Some("0.1".to_string()),
+            }),
+        })
+    }
+
+    async fn shutdown(&self) -> tower_lsp::jsonrpc::Result<()> {
+        Ok(())
+    }
+}

lsp/src/main.rs

@@ -0,0 +1,3 @@
+pub mod lsp;
+
+fn main() {}