fmt: optionals; none

vlib/v/fmt/fmt.v

@@ -304,6 +304,9 @@ fn (f mut Fmt) expr(node ast.Expr) {
 			}
 			f.write(')')
 		}
+		ast.None {
+			f.write('none')
+		}
 		ast.PostfixExpr {
 			f.expr(it.expr)
 			f.write(it.op.str())

vlib/v/fmt/tests/simple_expected.vv

@@ -69,3 +69,7 @@ fn (this User) fn_with_receiver() {
 	x := if true { 1 } else { 2 }
 	println('')
 }
+
+fn get_user() ?User {
+	return none
+}

vlib/v/fmt/tests/simple_input.vv

@@ -74,6 +74,6 @@ fn    (this User) fn_with_receiver() {
 println('')
 }
 
-//fn get_user() ? User {
-
-//}
+fn get_user() ? User {
+	return none
+}

vlib/v/table/atype_symbols.v

@@ -395,5 +395,9 @@ pub mut:
 
 pub fn (table &Table) type_to_str(t Type) string {
 	sym := table.get_type_symbol(t)
-	return sym.name.replace('array_', '[]')
+	mut res := sym.name.replace('array_', '[]')
+	if type_is_optional(t) {
+		res = '?' + res
+	}
+	return res
 }