Keep line break after function attributes

Fixes #504.

src/dfmt/formatter.d

@@ -713,13 +713,13 @@ private:
         {
             writeToken();
             if (spaceAfterParens || parenDepth > 0)
-                write(" ");
+                writeSpace();
         }
         else if ((peekIsKeyword() || peekIs(tok!"@")) && spaceAfterParens
                 && !peekIs(tok!"in") && !peekIs(tok!"is") && !peekIs(tok!"if"))
         {
             writeToken();
-            write(" ");
+            writeSpace();
         }
         else
             writeToken();
@@ -769,14 +769,7 @@ private:
                 || currentIs(tok!"identifier"))
                 && !currentIsIndentedTemplateConstraint())
         {
-            if (onNextLine)
-            {
-                newline();
-            }
-            else
-            {
-                write(" ");
-            }
+            writeSpace();
         }
     }
 
@@ -1289,14 +1282,7 @@ private:
         default:
             if (peekBackIs(tok!"identifier"))
             {
-                if (onNextLine)
-                {
-                    newline();
-                }
-                else
-                {
-                    write(" ");
-                }
+                writeSpace();
             }
             if (index + 1 < tokens.length)
             {
@@ -1310,14 +1296,7 @@ private:
                     writeToken();
                     if (!currentIsIndentedTemplateConstraint())
                     {
-                        if (onNextLine)
-                        {
-                            newline();
-                        }
-                        else
-                        {
-                            write(" ");
-                        }
+                        writeSpace();
                     }
                 }
             }
@@ -1943,6 +1922,18 @@ private:
             indents.push(type, detail);
     }
 
+    void writeSpace()
+    {
+        if (onNextLine)
+        {
+            newline();
+        }
+        else
+        {
+            write(" ");
+        }
+    }
+
 const pure @safe @nogc:
 
     size_t expressionEndIndex(size_t i, bool matchComma = false) nothrow

tests/allman/issue0504.d.ref

@@ -0,0 +1,40 @@
+deprecated("foo")
+void test()
+{
+}
+
+package(foo)
+void bar()
+{
+}
+
+@uda()
+void baz()
+{
+}
+
+deprecated
+deprecated_()
+{
+}
+
+@uda
+void uda_()
+{
+}
+
+@property
+void property()
+{
+}
+
+deprecated("Reason") @uda
+void propertyuda()
+{
+}
+
+deprecated("Reason")
+@uda
+void udaproperty()
+{
+}

tests/issue0504.args

@@ -0,0 +1 @@
+--keep_line_breaks=true

tests/issue0504.d

@@ -0,0 +1,40 @@
+deprecated("foo")
+void test()
+{
+}
+
+package(foo)
+void bar()
+{
+}
+
+@uda()
+void baz()
+{
+}
+
+deprecated
+deprecated_()
+{
+}
+
+@uda
+void uda_()
+{
+}
+
+@property
+void property()
+{
+}
+
+deprecated("Reason") @uda
+void propertyuda()
+{
+}
+
+deprecated("Reason")
+@uda
+void udaproperty()
+{
+}

tests/otbs/issue0504.d.ref

@@ -0,0 +1,32 @@
+deprecated("foo")
+void test() {
+}
+
+package(foo)
+void bar() {
+}
+
+@uda()
+void baz() {
+}
+
+deprecated
+deprecated_() {
+}
+
+@uda
+void uda_() {
+}
+
+@property
+void property() {
+}
+
+deprecated("Reason") @uda
+void propertyuda() {
+}
+
+deprecated("Reason")
+@uda
+void udaproperty() {
+}