parser: fix syntax error for for c in [othermod.Struct{field: 255}] { (fix #24943) (#24978)

vlib/v/parser/expr.v

@@ -83,8 +83,11 @@ fn (mut p Parser) check_expr(precedence int) !ast.Expr {
 					p.tok.pos())
 			} else if p.tok.kind == .question && p.peek_tok.kind == .amp {
 				node = p.prefix_expr()
-			} else if p.inside_for_expr && p.tok.kind == .name && p.tok.lit[0].is_capital()
+			} else if p.inside_for_expr && p.tok.kind == .name && ((p.tok.lit[0].is_capital()
-				&& p.peek_tok.kind == .lcbr && p.peek_token(2).kind in [.rcbr, .name] {
+				&& p.peek_tok.kind == .lcbr && p.peek_token(2).kind in [.rcbr, .name])
+				|| (p.inside_array_lit && p.peek_tok.kind == .dot && p.peek_token(2).kind == .name
+				&& p.peek_token(2).lit[0].is_capital() && p.peek_token(3).kind == .lcbr
+				&& p.peek_token(4).kind in [.rcbr, .name])) {
 				node = p.struct_init(p.mod + '.' + p.tok.lit, .normal, false)
 			} else if p.is_generic_name() && p.peek_tok.kind == .lcbr
 				&& p.peek_token(2).kind == .rcbr && p.peek_token(2).line_nr == p.tok.line_nr {

vlib/v/tests/structs/struct_init_with_mod_prefix_in_for_in_array_init_test.v

@@ -0,0 +1,36 @@
+import v.ast
+
+fn test_main() {
+	for idx, s in [ast.Struct{
+		scoped_name: '1'
+	}, ast.Struct{
+		embeds: [ast.Type(2), 3]
+	}, ast.Struct{
+		is_typedef: true
+		is_union:   true
+		is_heap:    true
+	}, ast.Struct{
+		is_minify: ast.Struct{
+			is_anon: true
+		}.is_generic
+		is_shared: true
+	}, ast.Struct{
+		has_option: true
+	}] {
+		println('${idx} ${s}')
+		if idx == 0 {
+			assert s.scoped_name == '1'
+		} else if idx == 1 {
+			assert s.embeds == [ast.Type(2), 3]
+		} else if idx == 2 {
+			assert s.is_typedef == true
+			assert s.is_union == true
+			assert s.is_heap == true
+		} else if idx == 3 {
+			assert s.is_minify == false
+			assert s.is_shared == true
+		} else if idx == 4 {
+			assert s.has_option == true
+		}
+	}
+}