anon expr

vlib/v/checker/struct.v

@@ -267,8 +267,13 @@ pub fn (mut c Checker) struct_init(mut node ast.StructInit) ast.Type {
 		&& c.table.cur_concrete_types.len == 0 {
 		pos := type_sym.name.last_index('.') or { -1 }
 		first_letter := type_sym.name[pos + 1]
-		if !first_letter.is_capital() && type_sym.kind != .placeholder {
-			c.error('cannot initialize builtin type `$type_sym.name`', node.pos)
+		if !first_letter.is_capital() && type_sym.kind != .placeholder
+			&& !type_sym.name.starts_with('_VAnonStruct') {
+			s := type_sym.name
+			x := s.starts_with('_')
+
+			c.error('cannot initialize builtin type1 $x  "$s" "${s[..4]}" `$type_sym.name`',
+				node.pos)
 		}
 	}
 	if type_sym.kind == .sum_type && node.fields.len == 1 {

vlib/v/parser/expr.v

@@ -325,6 +325,11 @@ pub fn (mut p Parser) check_expr(precedence int) ?ast.Expr {
 			node = p.map_init()
 			p.check(.rcbr)
 		}
+		.key_struct {
+			// Anonymous struct
+			p.next()
+			return p.struct_init('', false)
+		}
 		.key_fn {
 			if p.expecting_type {
 				// Anonymous function type

vlib/v/tests/struct_test.v

@@ -425,9 +425,10 @@ struct Book {
 }
 
 fn test_anon() {
-	empty_book := Book{} // author:struct{'sdf', 23}}
+	empty_book := Book{}
 	assert empty_book.author.age == 0
 	assert empty_book.author.name == ''
-
 	println(empty_book.author.age)
+
+	book := Book{ author:struct{'sdf', 23}}
 }