inlay hint chores

README.md

@@ -326,7 +326,7 @@ more is planned.
 
 #### Example output
 
-    42    ->MyAlias->MyType
+    l   ->MyAlias->MyType   42
 
 # Server
 

src/dcd/client/client.d

@@ -86,7 +86,8 @@ int runClient(string[] args)
 		getopt(args, "cursorPos|c", &cursorPos, "I", &addedImportPaths,
 			"R", &removedImportPaths, "port|p", &port, "help|h", &help,
 			"shutdown", &shutdown, "clearCache", &clearCache,
-			"symbolLocation|l", &symbolLocation, "doc|d", &doc, "inlayHints", &inlayHints,
+			"symbolLocation|l", &symbolLocation, "doc|d", &doc,
+			"inlayHints", &inlayHints,
 			"query|status|q", &query, "search|s", &search,
 			"version", &printVersion, "listImports", &listImports,
 			"tcp", &useTCP, "socketFile", &socketFile,
@@ -182,7 +183,7 @@ int runClient(string[] args)
 		printImportList(response);
 		return 0;
 	}
-	else if (search == null && cursorPos == size_t.max)
+	else if (search == null && !inlayHints && cursorPos == size_t.max)
 	{
 		// cursor position is a required argument
 		printHelp(args[0]);
@@ -300,6 +301,10 @@ Options:
         Gets documentation comments associated with the symbol at the cursor
         location.
 
+    --inlayHints
+        For all supported variable usages, show value types. Currently shows
+        alias definitions.
+
     --search | -s symbolName
         Searches for symbolName in both stdin / the given file name as well as
         others files cached by the server.
@@ -394,7 +399,11 @@ void printInlayHintsResponse(ref const AutocompleteResponse response)
 	auto app = appender!(string[])();
 	foreach (ref completion; response.completions)
 	{
-        app.put(makeTabSeparated(completion.symbolLocation.to!string, completion.identifier));
+		app.put(makeTabSeparated(
+			completion.kind == char.init ? "" : "" ~ completion.kind,
+			completion.identifier,
+			completion.symbolLocation.to!string
+		));
 	}
 	foreach (line; app.data)
 		writeln(line);

src/dcd/server/autocomplete/inlayhints.d

@@ -78,6 +78,7 @@ public AutocompleteResponse getInlayHints(const AutocompleteRequest request,
 		{
 			AutocompleteResponse.Completion c;
 			c.symbolLocation = it.location - 1;
+			c.kind = CompletionKind.aliasName;
 
 			DSymbol* type = it.type;
 

tests/tc_inlay_hints/expected.txt

@@ -0,0 +1 @@
+l	->Point	208

tests/tc_inlay_hints/file.d

@@ -0,0 +1,17 @@
+// when extending the inlayHints capabilities, don't forget to update the --help
+// text inside client.d
+
+import point;
+import point : P = Point;
+
+void foo(int x, int y) {}
+void foo(Point point) {}
+void bar(P point, int z = 1) {}
+
+void main()
+{
+	P p;
+	foo(1, 2);
+	foo(p);
+	bar(p, 3);
+}

tests/tc_inlay_hints/run.sh

@@ -0,0 +1,5 @@
+set -e
+set -u
+
+../../bin/dcd-client $1 --inlayHints file.d > actual.txt
+diff actual.txt expected.txt --strip-trailing-cr