Create rust project and implement the DOM

.gitignore

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+/target

Cargo.toml

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+[package]
+name = "browser-engine"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

src/dom.rs

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+struct Node {
+    // data common to all nodes:
+    children: Vec<Node>,
+
+    // data specific to each node type:
+    node_type: NodeType,
+}
+
+enum NodeType {
+    Text(String),
+    Element(ElementData),
+}
+
+struct ElementData {
+    tag_name: String,
+    attributes: AttrMap,
+}
+
+type AttrMap = HashMap<String, String>;
+
+
+fn text(data: String) -> Node {
+    Node { children: Vec::new(), node_type: NodeType::Text(data) }
+}
+
+fn elem(name: String, attrs: AttrMap, children: Vec<Node>) -> Node {
+    Node {
+        children: children,
+        node_type: NodeType::Element(ElementData {
+            tag_name: name,
+            attributes: attrs,
+        })
+    }
+}

src/main.rs

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+fn main() {
+    println!("Hello, world!");
+}