Question

我是YAML的新手并试图让一个例子运行起来。我有来自http://www.gamedev.net/page/resources/_/technical/apis-and-tools/yaml-basics-and-parsing-with-yaml-cpp-r3508的Sprites_list YAML文件，并且root / base节点始终为Null，但是大小为Always 0，类型为Scalar，并且尝试访问节点会抛出YAML :: BadSubscript异常。 Yaml 0.5.3的impl.h中的第118行。为什么根节点的大小为0，为什么不能访问节点？

YAML::Node root_node_ = YAML::Load( file );

if( root_node_.IsNull() )
    {
    // Never entered
    }

int sz = root_node_.size(); // Always 0
YAML::Node a_node = root_node_[ "Sprites_List" ]; // Exception

编辑 - ＆GT; 完整的文件内容（粘贴到名为sprites.yml的文件中）

Sprites_List: [Player, Monster, Gem]
Player:
    SpriteSheet: /Resources/Textures/duotone.png
    Anim_Names: [run, idle, jump, die]
    run:
        Offset: {x: 0, y: 0}
        Size: {w: 32, h: 32}
        Frame_Durations: [80, 80, 80, 80, 80, 80]
    idle:
        Offset: {x: 0, y: 32}
        Size: {w: 32, h: 32}
        Frame_Durations: [80, 120, 80, 30, 30, 130] #Notice the different durations!
    jump:
        Offset: {x: 0, y: 64}
        Size: {w: 32, h: 32}
        Frame_Durations: [80, 80, 120, 80, 80, 0] #Can I say 0 mean no skipping?
    die:
        Offset: {x: 0, y: 192} #192? Yup, it is the last row in that sheet.
        Size: {w: 32, h: 32}
        Frame_Durations: [80, 80, 80, 80, 80] #this one has only 5 frames.
Monster: #lol that lam nam
    SpriteSheet: /Resources/Textures/duotone.png
    Anim_Names: [hover, die]
    hover:
        Offset: {x: 0, y: 128}
        Size: {w: 32, h: 32}
        Frame_Durations: [120, 80, 120, 80]
    die:
        Offset: {x: 0, y: 160}
        Size: {w: 32, h: 32}
        Frame_Durations: [80, 80, 80, 80, 80]
Gem:
    SpriteSheet: /Resources/Textures/duotone.png
    Anim_Names: [shine]
    shine:
        Offset: {x: 0, y: 96}
        Size: {w: 32, h: 32}
        Frame_Durations: [80, 80, 80, 80, 80, 80]

在课堂宣言中 -

YAML::Node root_node_;

在课堂定义中 -

CConfigFile( std::string const & file ) :
    root_node_      ( YAML::Load( file ) )

文件路径是完整的绝对路径，并且每个\都以\\转义。

Answer 1

YAML::LoadFile加载YAML字符串，而不是文件。要加载文件，您需要使用{{1}}。

YAML根节点！空但大小为0

1 个答案: