如何修复警告：初始化器周围缺少括号？

Question

警告由vala生成的c代码生成。

  

警告：初始化程序周围缺少大括号

代码有效，但警告很烦人。警告引用的vala代码是

struct Position {uint x; uint y;}
private static Position positions[8];

生成的C代码是

static Position det_positions[8] = {0};

我已尝试初始化六种不同方式的位置，但似乎无法获得满足警告的语法。这是GCC bug 53119还是有办法解决它？

Answer 1

是的，这似乎与GCC bug 53119有关。如果您将C声明更改为{{0}}，它就会消失。您的选择是：

1. 忽略警告。
2. 使用{{0}}等操作后，在生成后操纵C代码，使{0}代替sed。
3. 在Vala中声明数组extern，并在其他地方写入C定义。 （＃2的永久版本。）
4. 执行struct foo { int bar; Position positions[8]; } static foo position_holder和{0}之类的操作会初始化position_holder.bar，这很好，警告就会消失。

Answer 2

当多维数组被设置为-Wall编译器标志时，多线阵列被视为线性数组（尽管它仍然正确且代码运行完美），也会出现此警告。

例如

char array[5][10][2] = {\
"0","0","0","0","0","0","0","0","0","0",\
"1","1","1","1","1","1","1","1","1","1",\
"2","2","2","2","2","2","2","2","2","2",\
"3","3","3","3","3","3","3","3","3","3",\
"4","4","4","4","4","4","4","4","4","4" };

这将生成警告。

执行以下更改以删除警告，如下所示

char array[5][10][2] = {\
{"0","0","0","0","0","0","0","0","0","0" },\
{"1","1","1","1","1","1","1","1","1","1"},\
{"2","2","2","2","2","2","2","2","2","2"},\
{"3","3","3","3","3","3","3","3","3","3"},\
{"4","4","4","4","4","4","4","4","4","4"} };

如果我错了，请纠正我。