C++ 读取Boost:：Graph中的_graphviz（），传递给构造函数

我使用python库生成了以下GraphViz.dot文件

现在我想把它读入C++的Boost:：Graph，这样我就可以在上面使用Boost:：Graph的库算法

但是，我需要做一些预处理。特别是，我想创建一个带有字符串构造函数的绑定属性，并让read_graphviz（）将点文件标签字段中的字符串传递到字符串构造函数中

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我该怎么做呢？

首先要意识到的是，Boost文档样本几乎总是引用/生成于实际样本：

要认识到的第二件事是BGL是高度通用的。非常它在概念上实现了很大程度的通用性

最后，请注意，从“自由形式”（至少是动态/非类型化文本形式）解析到某种泛型模型是有限制的

这说明了您必须如何阅读下文档的重要部分

无论如何，由于确实有点过时，请允许我证明：

将解析器的实现包括在一个翻译单元中：

#include <libs/graph/src/read_graphviz_new.cpp>

此类提供了对由

（名称、typeid（key\u type））

标识的各种底层对象的类型擦除访问

这意味着您可以注册绑定的属性，并将它们映射到graphviz属性名称：

int main() {
    // Construct an empty graph and prepare the dynamic_property_maps.
    graph_t graph(0);

    dynamic_properties dp(ignore_other_properties);
    dp.property("node_id", get(&Vertex::name,  graph));
    dp.property("label",   get(&Vertex::label, graph));
    dp.property("shape",   get(&Vertex::shape, graph));
    dp.property("label",   get(&Edge::label,   graph));

这就是一切。（请阅读，通过找到）

虽然我们不需要它，但让我们也将graph属性放入混合中（如文档示例中所示）：

//使用ref\u property\u map将图形属性转换为属性映射
boost:：ref_property_map gname（get_property（graph，graph_name））；
dp.财产（“名称”，gname）；

现在只剩下阅读图表了

嗯。那好吧。让我们也把它写出来，但是用一个新的图形名，然后：

std::ifstream dot("input.dot");

if (read_graphviz(dot, graph, dp/*, "node_id"*/)) {
    std::cout << "Graph name: '" << get_property(graph, graph_name) << "'\n";
    get_property(graph, graph_name) = "Let's give it a name";
    write_graphviz_dp(std::cout, graph, dp/*, "node_id"*/);
}

std:：ifstream-dot（“input.dot”）；
if（读取图（点、图、dp/*，“节点id”*/）{
std:：cout无法授予构造函数。该算法特别要求属性是默认可构造的（嘿，文档没那么糟糕：）（您可以解析为临时图，并从首选图类型中的临时图构建克隆）哇！让我删除对文档的评论。我不是程序员，要让它正常工作很令人沮丧。@avak哦，我确实意识到我有一个“不公平”的优势，那就是我以前多次阅读过这些文档（尽管如此，我发现值得注意的是，我只是通过
邻接列表
的页面找到了属性包的文档，例如）。Cheers@sehe啊，我知道问题出在哪里了，我在使用：
vertex\u index
as
node\u id
dp.property（“node\u id”，get（boost:：vertex\u index，graph））
propertymap的put方法无法将顶点索引放入属性映射中，方法是将其更改为另一个属性，如字符串。phcerdan您可以通过手动建模LevaluePropertyMap概念并输入它来伪造它（您可以使其成为
put
操作抛出的对象？）@phcerdan啊。又一天，谷歌告诉我，我以前回答过一个非常类似的问题（看起来你甚至不必为缺少的
put
操作操心：如果代码不使用概念界面的那部分，这不是问题）
int main() {
    // Construct an empty graph and prepare the dynamic_property_maps.
    graph_t graph(0);

    dynamic_properties dp(ignore_other_properties);
    dp.property("node_id", get(&Vertex::name,  graph));
    dp.property("label",   get(&Vertex::label, graph));
    dp.property("shape",   get(&Vertex::shape, graph));
    dp.property("label",   get(&Edge::label,   graph));

    // Use ref_property_map to turn a graph property into a property map
    boost::ref_property_map<graph_t *, std::string> gname(get_property(graph, graph_name));
    dp.property("name",    gname);

std::ifstream dot("input.dot");

if (read_graphviz(dot, graph, dp/*, "node_id"*/)) {
    std::cout << "Graph name: '" << get_property(graph, graph_name) << "'\n";
    get_property(graph, graph_name) = "Let's give it a name";
    write_graphviz_dp(std::cout, graph, dp/*, "node_id"*/);
}

#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/graphviz.hpp>
#include <boost/property_map/dynamic_property_map.hpp>
#include <libs/graph/src/read_graphviz_new.cpp>
#include <boost/graph/graph_utility.hpp>

using namespace boost;

struct Vertex {
    std::string name, label, shape;
};

struct Edge {
    std::string label;
    double weight; // perhaps you need this later as well, just an example
};

typedef property<graph_name_t, std::string> graph_p;
typedef adjacency_list<vecS, vecS, directedS, Vertex, Edge, graph_p> graph_t;

int main() {
    // Construct an empty graph and prepare the dynamic_property_maps.
    graph_t graph(0);

    dynamic_properties dp/*(ignore_other_properties)*/;
    dp.property("node_id", get(&Vertex::name,  graph));
    dp.property("label",   get(&Vertex::label, graph));
    dp.property("shape",   get(&Vertex::shape, graph));
    dp.property("label",   get(&Edge::label,   graph));

    // Use ref_property_map to turn a graph property into a property map
    boost::ref_property_map<graph_t *, std::string> gname(get_property(graph, graph_name));
    dp.property("name",    gname);

    std::ifstream dot("input.dot");

    if (read_graphviz(dot, graph, dp/*, "node_id"*/)) {
        std::cout << "Graph name: '" << get_property(graph, graph_name) << "'\n";
        get_property(graph, graph_name) = "Let's give it a name";
        write_graphviz_dp(std::cout, graph, dp/*, "node_id"*/);
    }
}

Graph name: ''
digraph G {
name="Let's give it a name";
n0 [label="A9\n", shape=box];
n1 [label="- [0.48%,19.42%]", shape=ellipse];
n11 [label="+ [0%,0%]", shape=ellipse];
n12 [label="- [0%,0.75%]", shape=ellipse];
n13 [label="+ [0.03%,1.33%]", shape=ellipse];
n14 [label="- [0%,0.75%]", shape=ellipse];
n15 [label="+ [0%,0%]", shape=ellipse];
n16 [label="+ [0%,0%]", shape=ellipse];
n17 [label="A14\n", shape=box];
n18 [label="+ [0.03%,2.51%]", shape=ellipse];
n19 [label="A15\n", shape=box];
n2 [label="A15\n", shape=box];
n20 [label="A6\n", shape=box];
n21 [label="A2\n", shape=box];
n22 [label="- [0%,1.11%]", shape=ellipse];
n23 [label="+ [0%,1%]", shape=ellipse];
n25 [label="- [0%,2.18%]", shape=ellipse];
n26 [label="+ [0%,1.79%]", shape=ellipse];
n27 [label="- [0%,1%]", shape=ellipse];
n28 [label="- [0%,0%]", shape=ellipse];
n29 [label="- [0%,0%]", shape=ellipse];
n3 [label="A11\n", shape=box];
n30 [label="- [0%,0%]", shape=ellipse];
n31 [label="- [0%,0%]", shape=ellipse];
n32 [label="- [0%,1%]", shape=ellipse];
n33 [label="A13\n", shape=box];
n34 [label="+ [0%,1%]", shape=ellipse];
n35 [label="- [0%,0%]", shape=ellipse];
n36 [label="- [0.01%,1.21%]", shape=ellipse];
n38 [label="A12\n", shape=box];
n39 [label="- [0%,1%]", shape=ellipse];
n4 [label="A4\n", shape=box];
n40 [label="+ [0%,1.17%]", shape=ellipse];
n42 [label="- [0%,0%]", shape=ellipse];
n43 [label="A12\n", shape=box];
n44 [label="+ [0%,1.11%]", shape=ellipse];
n45 [label="- [0%,1%]", shape=ellipse];
n47 [label="- [0%,0%]", shape=ellipse];
n49 [label="+ [0%,1.17%]", shape=ellipse];
n5 [label="+ [0%,0%]", shape=ellipse];
n52 [label="+ [0%,0.75%]", shape=ellipse];
n54 [label="A13\n", shape=box];
n55 [label="A14\n", shape=box];
n56 [label="- [0.03%,2.5%]", shape=ellipse];
n57 [label="+ [0.01%,2.27%]", shape=ellipse];
n59 [label="- [0%,0%]", shape=ellipse];
n6 [label="A7\n", shape=box];
n60 [label="+ [0%,1%]", shape=ellipse];
n63 [label="A15\n", shape=box];
n64 [label="+ [0.05%,1.34%]", shape=ellipse];
n65 [label="A15\n", shape=box];
n66 [label="- [0%,1%]", shape=ellipse];
n67 [label="+ [0.02%,2.44%]", shape=ellipse];
n7 [label="A14\n", shape=box];
n71 [label="+ [0.21%,3.83%]", shape=ellipse];
n8 [label="+ [0%,1.57%]", shape=ellipse];
n9 [label="- [0.01%,1.22%]", shape=ellipse];
n0->n1  [label=f];
n0->n2  [label=t];
n17->n18  [label="<=110"];
n17->n19  [label=">110"];
n19->n20  [label="<=8"];
n19->n49  [label=">8"];
n2->n3  [label="<=228"];
n2->n71  [label=">228"];
n20->n21  [label=aa];
n20->n25  [label=c];
n20->n26  [label=cc];
n20->n27  [label=d];
n20->n28  [label=e];
n20->n29  [label=ff];
n20->n30  [label=i];
n20->n31  [label=j];
n20->n32  [label=k];
n20->n33  [label=m];
n20->n38  [label=q];
n20->n42  [label=r];
n20->n43  [label=w];
n20->n47  [label=x];
n21->n22  [label="<=41"];
n21->n23  [label=">41"];
n3->n4  [label="<=3"];
n3->n63  [label=">3"];
n33->n34  [label=g];
n33->n35  [label=p];
n33->n36  [label=s];
n38->n39  [label=f];
n38->n40  [label=t];
n4->n5  [label=l];
n4->n6  [label=u];
n4->n54  [label=y];
n43->n44  [label=f];
n43->n45  [label=t];
n54->n55  [label=g];
n54->n59  [label=p];
n54->n60  [label=s];
n55->n56  [label="<=204"];
n55->n57  [label=">204"];
n6->n7  [label=bb];
n6->n11  [label=dd];
n6->n12  [label=ff];
n6->n13  [label=h];
n6->n14  [label=j];
n6->n15  [label=n];
n6->n16  [label=o];
n6->n17  [label=v];
n6->n52  [label=z];
n63->n64  [label="<=4"];
n63->n65  [label=">4"];
n65->n66  [label="<=5"];
n65->n67  [label=">5"];
n7->n8  [label="<=164"];
n7->n9  [label=">164"];
}