Fix indentation after attributes with arguments

Author: taku0

swift-mode-lexer.el

@@ -283,7 +283,18 @@
       t)
 
      ;; Supress implicit semicolon after attributes.
-     ((string-prefix-p "@" (swift-mode:token:text previous-token)) nil)
+     ((string-prefix-p "@" (swift-mode:token:text previous-token))
+      nil)
+
+     ;; Supress implicit semicolon after attributes with arguments.
+     ((and
+       (eq (swift-mode:token:type previous-token) '\))
+       (save-excursion
+         (backward-list)
+         (string-prefix-p
+          "@"
+          (swift-mode:token:text (swift-mode:backward-token-simple)))))
+      nil)
 
      ;; Inserts implicit semicolon before keywords that behave like method
      ;; names.

test/swift-files/declarations.swift

@@ -29,7 +29,7 @@ class Foo {
       =
       xx
 
-    @ABC
+    @ABC(aaa)
     final
       unowned(safe)
       fileprivate
@@ -234,6 +234,15 @@ func
     foo()
 }
 
+func
+  foo()
+  ->
+  @A(aaa)
+  B {
+    foo()
+    foo()
+}
+
 // Enumeration declarations
 
 fileprivate