Phase 2

examples/basic_parsing.rs

@@ -35,9 +35,9 @@ fn main() {
             println!("Found {} GameObjects:", game_objects.len());
             for go in game_objects {
                 if let Some(go_props) = go.get("GameObject") {
-                    if let Some(props) = go_props.as_mapping() {
-                        if let Some(name) = props.get(&serde_yaml::Value::String("m_Name".to_string())) {
-                            println!("  - {}", name.as_str().unwrap_or("Unknown"));
+                    if let Some(props) = go_props.as_object() {
+                        if let Some(name) = props.get("m_Name").and_then(|v| v.as_str()) {
+                            println!("  - {}", name);
                         }
                     }
                 }

src/error.rs

@@ -46,6 +46,14 @@ pub enum Error {
     /// Type conversion error
     #[error("Type conversion error: expected {expected}, found {found}")]
     TypeMismatch { expected: String, found: String },
+
+    /// Property value conversion error
+    #[error("Failed to convert property value from {from} to {to}")]
+    PropertyConversion { from: String, to: String },
+
+    /// Invalid property path
+    #[error("Invalid property path: {0}")]
+    InvalidPropertyPath(String),
 }
 
 impl Error {

src/lib.rs

@@ -19,8 +19,15 @@
 pub mod error;
 pub mod model;
 pub mod parser;
+pub mod property;
+pub mod types;
 
 // Re-exports
 pub use error::{Error, Result};
 pub use model::{UnityDocument, UnityFile};
 pub use parser::parse_unity_file;
+pub use property::PropertyValue;
+pub use types::{
+    Color, Component, ExternalRef, FileID, FileRef, GameObject, GenericComponent, LocalID,
+    Quaternion, RectTransform, Transform, Vector2, Vector3,
+};

src/model/mod.rs

@@ -1,3 +1,5 @@
+use crate::property::PropertyValue;
+use crate::types::{Color, FileID, Quaternion, Vector2, Vector3};
 use indexmap::IndexMap;
 use std::path::PathBuf;
 
@@ -27,7 +29,7 @@ impl UnityFile {
     }
 
     /// Get a document by its file ID
-    pub fn get_document(&self, file_id: i64) -> Option<&UnityDocument> {
+    pub fn get_document(&self, file_id: FileID) -> Option<&UnityDocument> {
         self.documents.iter().find(|doc| doc.file_id == file_id)
     }
 
@@ -55,7 +57,7 @@ pub struct UnityDocument {
     pub type_id: u32,
 
     /// File ID (from &ID anchor)
-    pub file_id: i64,
+    pub file_id: FileID,
 
     /// Class name (e.g., "GameObject", "Transform", "RectTransform")
     pub class_name: String,
@@ -66,7 +68,7 @@ pub struct UnityDocument {
 
 impl UnityDocument {
     /// Create a new UnityDocument
-    pub fn new(type_id: u32, file_id: i64, class_name: String) -> Self {
+    pub fn new(type_id: u32, file_id: FileID, class_name: String) -> Self {
         Self {
             type_id,
             file_id,
@@ -76,10 +78,67 @@ impl UnityDocument {
     }
 
     /// Get a property value by key
-    pub fn get(&self, key: &str) -> Option<&serde_yaml::Value> {
+    pub fn get(&self, key: &str) -> Option<&PropertyValue> {
         self.properties.get(key)
     }
 
+    /// Get a property value as a string
+    pub fn get_string(&self, key: &str) -> Option<&str> {
+        self.get(key).and_then(|v| v.as_str())
+    }
+
+    /// Get a property value as an i64
+    pub fn get_i64(&self, key: &str) -> Option<i64> {
+        self.get(key).and_then(|v| v.as_i64())
+    }
+
+    /// Get a property value as an f64
+    pub fn get_f64(&self, key: &str) -> Option<f64> {
+        self.get(key).and_then(|v| v.as_f64())
+    }
+
+    /// Get a property value as a bool
+    pub fn get_bool(&self, key: &str) -> Option<bool> {
+        self.get(key).and_then(|v| v.as_bool())
+    }
+
+    /// Get a property value as a Vector2
+    pub fn get_vector2(&self, key: &str) -> Option<&Vector2> {
+        self.get(key).and_then(|v| v.as_vector2())
+    }
+
+    /// Get a property value as a Vector3
+    pub fn get_vector3(&self, key: &str) -> Option<&Vector3> {
+        self.get(key).and_then(|v| v.as_vector3())
+    }
+
+    /// Get a property value as a Color
+    pub fn get_color(&self, key: &str) -> Option<&Color> {
+        self.get(key).and_then(|v| v.as_color())
+    }
+
+    /// Get a property value as a Quaternion
+    pub fn get_quaternion(&self, key: &str) -> Option<&Quaternion> {
+        self.get(key).and_then(|v| v.as_quaternion())
+    }
+
+    /// Get a property value as a FileID
+    pub fn get_file_ref(&self, key: &str) -> Option<FileID> {
+        self.get(key)
+            .and_then(|v| v.as_file_ref())
+            .map(|r| r.file_id)
+    }
+
+    /// Get a property value as an array
+    pub fn get_array(&self, key: &str) -> Option<&Vec<PropertyValue>> {
+        self.get(key).and_then(|v| v.as_array())
+    }
+
+    /// Get a property value as an object
+    pub fn get_object(&self, key: &str) -> Option<&IndexMap<String, PropertyValue>> {
+        self.get(key).and_then(|v| v.as_object())
+    }
+
     /// Check if this is a GameObject
     pub fn is_game_object(&self) -> bool {
         self.class_name == "GameObject" || self.type_id == 1
@@ -91,5 +150,5 @@ impl UnityDocument {
     }
 }
 
-/// Property map type (ordered map of string keys to YAML values)
-pub type PropertyMap = IndexMap<String, serde_yaml::Value>;
+/// Property map type (ordered map of string keys to typed property values)
+pub type PropertyMap = IndexMap<String, PropertyValue>;

src/parser/mod.rs

@@ -6,6 +6,7 @@ mod yaml;
 pub use unity_tag::{UnityTag, parse_unity_tag};
 pub use yaml::split_yaml_documents;
 
+use crate::property::convert_yaml_value;
 use crate::{Error, Result, UnityDocument, UnityFile};
 use std::path::Path;
 
@@ -74,10 +75,14 @@ fn parse_document(raw_doc: &str) -> Result<Option<UnityDocument>> {
     } else {
         match serde_yaml::from_str::<serde_yaml::Value>(yaml_content) {
             Ok(serde_yaml::Value::Mapping(map)) => {
-                // Convert to IndexMap
+                // Convert to IndexMap with PropertyValue
                 map.into_iter()
                     .filter_map(|(k, v)| {
-                        k.as_str().map(|s| (s.to_string(), v))
+                        k.as_str().and_then(|s| {
+                            convert_yaml_value(&v)
+                                .ok()
+                                .map(|pv| (s.to_string(), pv))
+                        })
                     })
                     .collect()
             }
@@ -95,7 +100,7 @@ fn parse_document(raw_doc: &str) -> Result<Option<UnityDocument>> {
 
     Ok(Some(UnityDocument {
         type_id: tag.type_id,
-        file_id: tag.file_id,
+        file_id: crate::types::FileID::from_i64(tag.file_id),
         class_name,
         properties,
     }))

src/property/mod.rs

@@ -0,0 +1,531 @@
+//! Property value types and conversion
+//!
+//! This module provides the `PropertyValue` enum which represents
+//! typed Unity property values, and conversion logic from YAML values.
+
+use crate::types::{Color, ExternalRef, FileID, FileRef, Quaternion, Vector2, Vector3};
+use crate::Error;
+use indexmap::IndexMap;
+use std::fmt;
+
+/// A typed property value in a Unity object
+///
+/// This enum represents all possible value types that can appear
+/// in Unity YAML files, including Unity-specific types like Vector3 and Color.
+#[derive(Debug, Clone, PartialEq)]
+pub enum PropertyValue {
+    /// Integer value
+    Integer(i64),
+    /// Floating-point value
+    Float(f64),
+    /// String value
+    String(String),
+    /// Boolean value
+    Boolean(bool),
+    /// Null value
+    Null,
+
+    // Unity-specific types
+    /// 2D vector (x, y)
+    Vector2(Vector2),
+    /// 3D vector (x, y, z)
+    Vector3(Vector3),
+    /// Color (r, g, b, a)
+    Color(Color),
+    /// Quaternion rotation (x, y, z, w)
+    Quaternion(Quaternion),
+    /// Reference to another object by file ID
+    FileRef(FileRef),
+    /// Reference to an external asset by GUID
+    ExternalRef(ExternalRef),
+
+    // Collections
+    /// Array of values
+    Array(Vec<PropertyValue>),
+    /// Nested object with properties
+    Object(IndexMap<String, PropertyValue>),
+}
+
+impl PropertyValue {
+    /// Try to get this value as an integer
+    pub fn as_i64(&self) -> Option<i64> {
+        match self {
+            PropertyValue::Integer(v) => Some(*v),
+            _ => None,
+        }
+    }
+
+    /// Try to get this value as a float
+    pub fn as_f64(&self) -> Option<f64> {
+        match self {
+            PropertyValue::Float(v) => Some(*v),
+            PropertyValue::Integer(v) => Some(*v as f64),
+            _ => None,
+        }
+    }
+
+    /// Try to get this value as a string reference
+    pub fn as_str(&self) -> Option<&str> {
+        match self {
+            PropertyValue::String(s) => Some(s.as_str()),
+            _ => None,
+        }
+    }
+
+    /// Try to get this value as a boolean
+    pub fn as_bool(&self) -> Option<bool> {
+        match self {
+            PropertyValue::Boolean(b) => Some(*b),
+            _ => None,
+        }
+    }
+
+    /// Try to get this value as a Vector2
+    pub fn as_vector2(&self) -> Option<&Vector2> {
+        match self {
+            PropertyValue::Vector2(v) => Some(v),
+            _ => None,
+        }
+    }
+
+    /// Try to get this value as a Vector3
+    pub fn as_vector3(&self) -> Option<&Vector3> {
+        match self {
+            PropertyValue::Vector3(v) => Some(v),
+            _ => None,
+        }
+    }
+
+    /// Try to get this value as a Color
+    pub fn as_color(&self) -> Option<&Color> {
+        match self {
+            PropertyValue::Color(c) => Some(c),
+            _ => None,
+        }
+    }
+
+    /// Try to get this value as a Quaternion
+    pub fn as_quaternion(&self) -> Option<&Quaternion> {
+        match self {
+            PropertyValue::Quaternion(q) => Some(q),
+            _ => None,
+        }
+    }
+
+    /// Try to get this value as a FileRef
+    pub fn as_file_ref(&self) -> Option<&FileRef> {
+        match self {
+            PropertyValue::FileRef(r) => Some(r),
+            _ => None,
+        }
+    }
+
+    /// Try to get this value as an ExternalRef
+    pub fn as_external_ref(&self) -> Option<&ExternalRef> {
+        match self {
+            PropertyValue::ExternalRef(r) => Some(r),
+            _ => None,
+        }
+    }
+
+    /// Try to get this value as an array
+    pub fn as_array(&self) -> Option<&Vec<PropertyValue>> {
+        match self {
+            PropertyValue::Array(arr) => Some(arr),
+            _ => None,
+        }
+    }
+
+    /// Try to get this value as an object
+    pub fn as_object(&self) -> Option<&IndexMap<String, PropertyValue>> {
+        match self {
+            PropertyValue::Object(obj) => Some(obj),
+            _ => None,
+        }
+    }
+
+    /// Check if this value is null
+    pub fn is_null(&self) -> bool {
+        matches!(self, PropertyValue::Null)
+    }
+
+    /// Check if this value is an array
+    pub fn is_array(&self) -> bool {
+        matches!(self, PropertyValue::Array(_))
+    }
+
+    /// Check if this value is an object
+    pub fn is_object(&self) -> bool {
+        matches!(self, PropertyValue::Object(_))
+    }
+
+    /// Check if this value is a Vector3
+    pub fn is_vector3(&self) -> bool {
+        matches!(self, PropertyValue::Vector3(_))
+    }
+
+    /// Check if this value is a Color
+    pub fn is_color(&self) -> bool {
+        matches!(self, PropertyValue::Color(_))
+    }
+
+    /// Check if this value is a FileRef
+    pub fn is_file_ref(&self) -> bool {
+        matches!(self, PropertyValue::FileRef(_))
+    }
+}
+
+impl fmt::Display for PropertyValue {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            PropertyValue::Integer(v) => write!(f, "{}", v),
+            PropertyValue::Float(v) => write!(f, "{}", v),
+            PropertyValue::String(s) => write!(f, "\"{}\"", s),
+            PropertyValue::Boolean(b) => write!(f, "{}", b),
+            PropertyValue::Null => write!(f, "null"),
+            PropertyValue::Vector2(v) => write!(f, "({}, {})", v.x, v.y),
+            PropertyValue::Vector3(v) => write!(f, "({}, {}, {})", v.x, v.y, v.z),
+            PropertyValue::Color(c) => write!(f, "rgba({}, {}, {}, {})", c.r, c.g, c.b, c.a),
+            PropertyValue::Quaternion(q) => write!(f, "({}, {}, {}, {})", q.x, q.y, q.z, q.w),
+            PropertyValue::FileRef(r) => write!(f, "{{fileID: {}}}", r.file_id),
+            PropertyValue::ExternalRef(r) => write!(f, "{{guid: {}, type: {}}}", r.guid, r.type_id),
+            PropertyValue::Array(arr) => {
+                write!(f, "[")?;
+                for (i, item) in arr.iter().enumerate() {
+                    if i > 0 {
+                        write!(f, ", ")?;
+                    }
+                    write!(f, "{}", item)?;
+                }
+                write!(f, "]")
+            }
+            PropertyValue::Object(obj) => {
+                write!(f, "{{")?;
+                for (i, (k, v)) in obj.iter().enumerate() {
+                    if i > 0 {
+                        write!(f, ", ")?;
+                    }
+                    write!(f, "{}: {}", k, v)?;
+                }
+                write!(f, "}}")
+            }
+        }
+    }
+}
+
+/// Convert a serde_yaml::Value to a PropertyValue
+///
+/// This function recognizes Unity-specific patterns in YAML mappings:
+/// - `{fileID: N}` → `PropertyValue::FileRef`
+/// - `{x, y, z}` → `PropertyValue::Vector3`
+/// - `{x, y}` → `PropertyValue::Vector2`
+/// - `{r, g, b, a}` → `PropertyValue::Color`
+/// - `{x, y, z, w}` → `PropertyValue::Quaternion`
+/// - `{guid, type}` → `PropertyValue::ExternalRef`
+pub fn convert_yaml_value(value: &serde_yaml::Value) -> crate::Result<PropertyValue> {
+    match value {
+        serde_yaml::Value::Null => Ok(PropertyValue::Null),
+        serde_yaml::Value::Bool(b) => Ok(PropertyValue::Boolean(*b)),
+        serde_yaml::Value::Number(n) => {
+            if let Some(i) = n.as_i64() {
+                Ok(PropertyValue::Integer(i))
+            } else if let Some(f) = n.as_f64() {
+                Ok(PropertyValue::Float(f))
+            } else {
+                Err(Error::invalid_format(format!(
+                    "Unsupported number format: {}",
+                    n
+                )))
+            }
+        }
+        serde_yaml::Value::String(s) => Ok(PropertyValue::String(s.clone())),
+        serde_yaml::Value::Sequence(seq) => {
+            let mut array = Vec::with_capacity(seq.len());
+            for item in seq {
+                array.push(convert_yaml_value(item)?);
+            }
+            Ok(PropertyValue::Array(array))
+        }
+        serde_yaml::Value::Mapping(map) => {
+            // Check for Unity-specific patterns
+            if let Some(unity_type) = try_convert_unity_type(map)? {
+                Ok(unity_type)
+            } else {
+                // Convert to generic object
+                let mut object = IndexMap::new();
+                for (k, v) in map {
+                    if let Some(key) = k.as_str() {
+                        object.insert(key.to_string(), convert_yaml_value(v)?);
+                    }
+                }
+                Ok(PropertyValue::Object(object))
+            }
+        }
+        _ => Err(Error::invalid_format(format!(
+            "Unsupported YAML value type: {:?}",
+            value
+        ))),
+    }
+}
+
+/// Try to convert a YAML mapping to a Unity-specific type
+fn try_convert_unity_type(
+    map: &serde_yaml::Mapping,
+) -> crate::Result<Option<PropertyValue>> {
+    // Helper to get a float from a mapping
+    let get_f32 = |key: &str| -> Option<f32> {
+        map.get(&serde_yaml::Value::String(key.to_string()))
+            .and_then(|v| v.as_f64())
+            .map(|f| f as f32)
+    };
+
+    // Helper to get an i64 from a mapping
+    let get_i64 = |key: &str| -> Option<i64> {
+        map.get(&serde_yaml::Value::String(key.to_string()))
+            .and_then(|v| v.as_i64())
+    };
+
+    // Helper to get a string from a mapping
+    let get_string = |key: &str| -> Option<String> {
+        map.get(&serde_yaml::Value::String(key.to_string()))
+            .and_then(|v| v.as_str())
+            .map(|s| s.to_string())
+    };
+
+    // Check for {fileID: N} pattern
+    if map.len() == 1 && map.contains_key(&serde_yaml::Value::String("fileID".to_string())) {
+        if let Some(file_id) = get_i64("fileID") {
+            return Ok(Some(PropertyValue::FileRef(FileRef::new(
+                FileID::from_i64(file_id),
+            ))));
+        }
+    }
+
+    // Check for {guid: ..., type: N} pattern
+    if map.len() == 2
+        && map.contains_key(&serde_yaml::Value::String("guid".to_string()))
+        && map.contains_key(&serde_yaml::Value::String("type".to_string()))
+    {
+        if let (Some(guid), Some(type_id)) = (get_string("guid"), get_i64("type")) {
+            return Ok(Some(PropertyValue::ExternalRef(ExternalRef::new(
+                guid,
+                type_id as i32,
+            ))));
+        }
+    }
+
+    // Check for {r, g, b, a} pattern (Color)
+    if map.len() == 4
+        && map.contains_key(&serde_yaml::Value::String("r".to_string()))
+        && map.contains_key(&serde_yaml::Value::String("g".to_string()))
+        && map.contains_key(&serde_yaml::Value::String("b".to_string()))
+        && map.contains_key(&serde_yaml::Value::String("a".to_string()))
+    {
+        if let (Some(r), Some(g), Some(b), Some(a)) =
+            (get_f32("r"), get_f32("g"), get_f32("b"), get_f32("a"))
+        {
+            return Ok(Some(PropertyValue::Color(Color::new(r, g, b, a))));
+        }
+    }
+
+    // Check for {x, y, z, w} pattern (Quaternion)
+    if map.len() == 4
+        && map.contains_key(&serde_yaml::Value::String("x".to_string()))
+        && map.contains_key(&serde_yaml::Value::String("y".to_string()))
+        && map.contains_key(&serde_yaml::Value::String("z".to_string()))
+        && map.contains_key(&serde_yaml::Value::String("w".to_string()))
+    {
+        if let (Some(x), Some(y), Some(z), Some(w)) =
+            (get_f32("x"), get_f32("y"), get_f32("z"), get_f32("w"))
+        {
+            return Ok(Some(PropertyValue::Quaternion(Quaternion::new(
+                x, y, z, w,
+            ))));
+        }
+    }
+
+    // Check for {x, y, z} pattern (Vector3)
+    if map.len() == 3
+        && map.contains_key(&serde_yaml::Value::String("x".to_string()))
+        && map.contains_key(&serde_yaml::Value::String("y".to_string()))
+        && map.contains_key(&serde_yaml::Value::String("z".to_string()))
+    {
+        if let (Some(x), Some(y), Some(z)) = (get_f32("x"), get_f32("y"), get_f32("z")) {
+            return Ok(Some(PropertyValue::Vector3(Vector3::new(x, y, z))));
+        }
+    }
+
+    // Check for {x, y} pattern (Vector2)
+    if map.len() == 2
+        && map.contains_key(&serde_yaml::Value::String("x".to_string()))
+        && map.contains_key(&serde_yaml::Value::String("y".to_string()))
+    {
+        if let (Some(x), Some(y)) = (get_f32("x"), get_f32("y")) {
+            return Ok(Some(PropertyValue::Vector2(Vector2::new(x, y))));
+        }
+    }
+
+    // Not a Unity-specific type
+    Ok(None)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use serde_yaml::Value;
+
+    #[test]
+    fn test_convert_primitives() {
+        assert_eq!(
+            convert_yaml_value(&Value::Null).unwrap(),
+            PropertyValue::Null
+        );
+        assert_eq!(
+            convert_yaml_value(&Value::Bool(true)).unwrap(),
+            PropertyValue::Boolean(true)
+        );
+        assert_eq!(
+            convert_yaml_value(&Value::Number(42.into())).unwrap(),
+            PropertyValue::Integer(42)
+        );
+        assert_eq!(
+            convert_yaml_value(&Value::String("test".to_string())).unwrap(),
+            PropertyValue::String("test".to_string())
+        );
+    }
+
+    #[test]
+    fn test_convert_vector3() {
+        let yaml = serde_yaml::from_str("{ x: 1.0, y: 2.0, z: 3.0 }").unwrap();
+        let result = convert_yaml_value(&yaml).unwrap();
+
+        if let PropertyValue::Vector3(v) = result {
+            assert_eq!(v.x, 1.0);
+            assert_eq!(v.y, 2.0);
+            assert_eq!(v.z, 3.0);
+        } else {
+            panic!("Expected Vector3, got {:?}", result);
+        }
+    }
+
+    #[test]
+    fn test_convert_vector2() {
+        let yaml = serde_yaml::from_str("{ x: 1.0, y: 2.0 }").unwrap();
+        let result = convert_yaml_value(&yaml).unwrap();
+
+        if let PropertyValue::Vector2(v) = result {
+            assert_eq!(v.x, 1.0);
+            assert_eq!(v.y, 2.0);
+        } else {
+            panic!("Expected Vector2, got {:?}", result);
+        }
+    }
+
+    #[test]
+    fn test_convert_color() {
+        let yaml = serde_yaml::from_str("{ r: 1.0, g: 0.5, b: 0.0, a: 1.0 }").unwrap();
+        let result = convert_yaml_value(&yaml).unwrap();
+
+        if let PropertyValue::Color(c) = result {
+            assert_eq!(c.r, 1.0);
+            assert_eq!(c.g, 0.5);
+            assert_eq!(c.b, 0.0);
+            assert_eq!(c.a, 1.0);
+        } else {
+            panic!("Expected Color, got {:?}", result);
+        }
+    }
+
+    #[test]
+    fn test_convert_quaternion() {
+        let yaml = serde_yaml::from_str("{ x: 0.0, y: 0.0, z: 0.0, w: 1.0 }").unwrap();
+        let result = convert_yaml_value(&yaml).unwrap();
+
+        if let PropertyValue::Quaternion(q) = result {
+            assert_eq!(q.x, 0.0);
+            assert_eq!(q.w, 1.0);
+        } else {
+            panic!("Expected Quaternion, got {:?}", result);
+        }
+    }
+
+    #[test]
+    fn test_convert_file_ref() {
+        let yaml = serde_yaml::from_str("{ fileID: 12345 }").unwrap();
+        let result = convert_yaml_value(&yaml).unwrap();
+
+        if let PropertyValue::FileRef(r) = result {
+            assert_eq!(r.file_id.as_i64(), 12345);
+        } else {
+            panic!("Expected FileRef, got {:?}", result);
+        }
+    }
+
+    #[test]
+    fn test_convert_external_ref() {
+        let yaml = serde_yaml::from_str("{ guid: abc123, type: 2 }").unwrap();
+        let result = convert_yaml_value(&yaml).unwrap();
+
+        if let PropertyValue::ExternalRef(r) = result {
+            assert_eq!(r.guid, "abc123");
+            assert_eq!(r.type_id, 2);
+        } else {
+            panic!("Expected ExternalRef, got {:?}", result);
+        }
+    }
+
+    #[test]
+    fn test_convert_array() {
+        let yaml = serde_yaml::from_str("[1, 2, 3]").unwrap();
+        let result = convert_yaml_value(&yaml).unwrap();
+
+        if let PropertyValue::Array(arr) = result {
+            assert_eq!(arr.len(), 3);
+            assert_eq!(arr[0].as_i64(), Some(1));
+            assert_eq!(arr[1].as_i64(), Some(2));
+            assert_eq!(arr[2].as_i64(), Some(3));
+        } else {
+            panic!("Expected Array, got {:?}", result);
+        }
+    }
+
+    #[test]
+    fn test_convert_object() {
+        let yaml = serde_yaml::from_str("{ name: Test, value: 42 }").unwrap();
+        let result = convert_yaml_value(&yaml).unwrap();
+
+        if let PropertyValue::Object(obj) = result {
+            assert_eq!(obj.get("name").and_then(|v| v.as_str()), Some("Test"));
+            assert_eq!(obj.get("value").and_then(|v| v.as_i64()), Some(42));
+        } else {
+            panic!("Expected Object, got {:?}", result);
+        }
+    }
+
+    #[test]
+    fn test_accessors() {
+        let val = PropertyValue::Integer(42);
+        assert_eq!(val.as_i64(), Some(42));
+        assert_eq!(val.as_f64(), Some(42.0));
+        assert_eq!(val.as_str(), None);
+
+        let val = PropertyValue::String("test".to_string());
+        assert_eq!(val.as_str(), Some("test"));
+        assert_eq!(val.as_i64(), None);
+    }
+
+    #[test]
+    fn test_type_checks() {
+        assert!(PropertyValue::Null.is_null());
+        assert!(PropertyValue::Array(vec![]).is_array());
+        assert!(PropertyValue::Vector3(Vector3::zero()).is_vector3());
+        assert!(PropertyValue::Color(Color::white()).is_color());
+    }
+
+    #[test]
+    fn test_display() {
+        assert_eq!(format!("{}", PropertyValue::Integer(42)), "42");
+        assert_eq!(format!("{}", PropertyValue::String("test".to_string())), "\"test\"");
+        assert_eq!(format!("{}", PropertyValue::Vector3(Vector3::new(1.0, 2.0, 3.0))), "(1, 2, 3)");
+    }
+}

src/types/component.rs

@@ -0,0 +1,163 @@
+//! Component trait and generic component wrapper
+
+use crate::model::UnityDocument;
+use crate::types::FileRef;
+
+/// A trait for Unity components
+///
+/// Components are attached to GameObjects and provide functionality.
+pub trait Component {
+    /// Get the GameObject this component is attached to
+    fn game_object(&self) -> Option<FileRef>;
+
+    /// Check if this component is enabled
+    fn is_enabled(&self) -> bool {
+        true // Default implementation
+    }
+
+    /// Get the underlying UnityDocument
+    fn document(&self) -> &UnityDocument;
+}
+
+/// A generic component wrapper that works with any component type
+///
+/// # Examples
+///
+/// ```no_run
+/// use cursebreaker_parser::{UnityFile, types::{Component, GenericComponent}};
+///
+/// let file = UnityFile::from_path("Scene.unity")?;
+/// for doc in &file.documents {
+///     if !doc.is_game_object() {
+///         if let Some(comp) = GenericComponent::new(doc) {
+///             println!("Component: {}", doc.class_name);
+///             if let Some(go_ref) = comp.game_object() {
+///                 println!("  Attached to: {}", go_ref.file_id);
+///             }
+///         }
+///     }
+/// }
+/// # Ok::<(), cursebreaker_parser::Error>(())
+/// ```
+#[derive(Debug)]
+pub struct GenericComponent<'a> {
+    document: &'a UnityDocument,
+}
+
+impl<'a> GenericComponent<'a> {
+    /// Create a GenericComponent wrapper from a UnityDocument
+    ///
+    /// Returns None if the document is a GameObject (GameObjects are not components).
+    pub fn new(document: &'a UnityDocument) -> Option<Self> {
+        if !document.is_game_object() {
+            Some(Self { document })
+        } else {
+            None
+        }
+    }
+
+    /// Get the class name of this component
+    pub fn class_name(&self) -> &str {
+        &self.document.class_name
+    }
+}
+
+impl<'a> Component for GenericComponent<'a> {
+    fn game_object(&self) -> Option<FileRef> {
+        // Look for m_GameObject property which is common to all components
+        self.document
+            .get(&self.document.class_name)
+            .and_then(|obj| obj.as_object())
+            .and_then(|props| props.get("m_GameObject"))
+            .and_then(|v| v.as_file_ref())
+            .copied()
+    }
+
+    fn is_enabled(&self) -> bool {
+        // Look for m_Enabled property
+        self.document
+            .get(&self.document.class_name)
+            .and_then(|obj| obj.as_object())
+            .and_then(|props| props.get("m_Enabled"))
+            .and_then(|v| v.as_bool())
+            .unwrap_or(true) // Default to enabled
+    }
+
+    fn document(&self) -> &UnityDocument {
+        self.document
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::property::PropertyValue;
+    use crate::types::FileID;
+    use indexmap::IndexMap;
+
+    fn create_test_component() -> UnityDocument {
+        let mut properties = IndexMap::new();
+
+        let mut comp_props = IndexMap::new();
+        comp_props.insert(
+            "m_GameObject".to_string(),
+            PropertyValue::FileRef(crate::types::FileRef::new(FileID::from_i64(67890))),
+        );
+        comp_props.insert("m_Enabled".to_string(), PropertyValue::Boolean(true));
+
+        properties.insert("Transform".to_string(), PropertyValue::Object(comp_props));
+
+        UnityDocument {
+            type_id: 4,
+            file_id: FileID::from_i64(12345),
+            class_name: "Transform".to_string(),
+            properties,
+        }
+    }
+
+    #[test]
+    fn test_component_creation() {
+        let doc = create_test_component();
+        let comp = GenericComponent::new(&doc);
+        assert!(comp.is_some());
+    }
+
+    #[test]
+    fn test_component_game_object_ref() {
+        let doc = create_test_component();
+        let comp = GenericComponent::new(&doc).unwrap();
+        let go_ref = comp.game_object();
+        assert!(go_ref.is_some());
+        assert_eq!(go_ref.unwrap().file_id.as_i64(), 67890);
+    }
+
+    #[test]
+    fn test_component_is_enabled() {
+        let doc = create_test_component();
+        let comp = GenericComponent::new(&doc).unwrap();
+        assert!(comp.is_enabled());
+    }
+
+    #[test]
+    fn test_component_class_name() {
+        let doc = create_test_component();
+        let comp = GenericComponent::new(&doc).unwrap();
+        assert_eq!(comp.class_name(), "Transform");
+    }
+
+    #[test]
+    fn test_game_object_is_not_component() {
+        let mut properties = IndexMap::new();
+        properties.insert("GameObject".to_string(), PropertyValue::Object(IndexMap::new()));
+
+        let doc = UnityDocument {
+            type_id: 1,
+            file_id: FileID::from_i64(12345),
+            class_name: "GameObject".to_string(),
+            properties,
+        };
+
+        let comp = GenericComponent::new(&doc);
+        assert!(comp.is_none());
+    }
+}

src/types/game_object.rs

@@ -0,0 +1,180 @@
+//! GameObject wrapper for ergonomic access to GameObject properties
+
+use crate::model::UnityDocument;
+use crate::types::{FileID, FileRef};
+
+/// A wrapper around a UnityDocument that represents a GameObject
+///
+/// Provides convenient access to common GameObject properties.
+///
+/// # Examples
+///
+/// ```no_run
+/// use cursebreaker_parser::{UnityFile, types::GameObject};
+///
+/// let file = UnityFile::from_path("Scene.unity")?;
+/// for doc in &file.documents {
+///     if let Some(go) = GameObject::new(doc) {
+///         println!("GameObject: {}", go.name().unwrap_or("Unnamed"));
+///         println!("  Active: {}", go.is_active());
+///         println!("  Components: {}", go.components().len());
+///     }
+/// }
+/// # Ok::<(), cursebreaker_parser::Error>(())
+/// ```
+#[derive(Debug)]
+pub struct GameObject<'a> {
+    document: &'a UnityDocument,
+}
+
+impl<'a> GameObject<'a> {
+    /// Create a GameObject wrapper from a UnityDocument
+    ///
+    /// Returns None if the document is not a GameObject.
+    pub fn new(document: &'a UnityDocument) -> Option<Self> {
+        if document.is_game_object() {
+            Some(Self { document })
+        } else {
+            None
+        }
+    }
+
+    /// Get the GameObject's name
+    pub fn name(&self) -> Option<&str> {
+        self.document
+            .get("GameObject")
+            .and_then(|obj| obj.as_object())
+            .and_then(|props| props.get("m_Name"))
+            .and_then(|v| v.as_str())
+    }
+
+    /// Check if the GameObject is active
+    pub fn is_active(&self) -> bool {
+        self.document
+            .get("GameObject")
+            .and_then(|obj| obj.as_object())
+            .and_then(|props| props.get("m_IsActive"))
+            .and_then(|v| v.as_bool())
+            .unwrap_or(true) // Default to true if not specified
+    }
+
+    /// Get the GameObject's layer
+    pub fn layer(&self) -> Option<i64> {
+        self.document
+            .get("GameObject")
+            .and_then(|obj| obj.as_object())
+            .and_then(|props| props.get("m_Layer"))
+            .and_then(|v| v.as_i64())
+    }
+
+    /// Get the GameObject's tag as a tag ID
+    pub fn tag(&self) -> Option<i64> {
+        self.document
+            .get("GameObject")
+            .and_then(|obj| obj.as_object())
+            .and_then(|props| props.get("m_TagString"))
+            .and_then(|v| v.as_i64())
+    }
+
+    /// Get the list of component references attached to this GameObject
+    pub fn components(&self) -> Vec<FileRef> {
+        self.document
+            .get("GameObject")
+            .and_then(|obj| obj.as_object())
+            .and_then(|props| props.get("m_Component"))
+            .and_then(|v| v.as_array())
+            .map(|arr| {
+                arr.iter()
+                    .filter_map(|item| {
+                        item.as_object().and_then(|obj| {
+                            obj.get("component")
+                                .and_then(|v| v.as_file_ref())
+                                .copied()
+                        })
+                    })
+                    .collect()
+            })
+            .unwrap_or_default()
+    }
+
+    /// Get the file ID of this GameObject
+    pub fn file_id(&self) -> FileID {
+        self.document.file_id
+    }
+
+    /// Get the underlying UnityDocument
+    pub fn document(&self) -> &'a UnityDocument {
+        self.document
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::property::PropertyValue;
+    use indexmap::IndexMap;
+
+    fn create_test_game_object() -> UnityDocument {
+        let mut properties = IndexMap::new();
+
+        let mut go_props = IndexMap::new();
+        go_props.insert("m_Name".to_string(), PropertyValue::String("TestObject".to_string()));
+        go_props.insert("m_IsActive".to_string(), PropertyValue::Boolean(true));
+        go_props.insert("m_Layer".to_string(), PropertyValue::Integer(0));
+        go_props.insert("m_Component".to_string(), PropertyValue::Array(vec![]));
+
+        properties.insert("GameObject".to_string(), PropertyValue::Object(go_props));
+
+        UnityDocument {
+            type_id: 1,
+            file_id: FileID::from_i64(12345),
+            class_name: "GameObject".to_string(),
+            properties,
+        }
+    }
+
+    #[test]
+    fn test_game_object_creation() {
+        let doc = create_test_game_object();
+        let go = GameObject::new(&doc);
+        assert!(go.is_some());
+    }
+
+    #[test]
+    fn test_game_object_name() {
+        let doc = create_test_game_object();
+        let go = GameObject::new(&doc).unwrap();
+        assert_eq!(go.name(), Some("TestObject"));
+    }
+
+    #[test]
+    fn test_game_object_is_active() {
+        let doc = create_test_game_object();
+        let go = GameObject::new(&doc).unwrap();
+        assert!(go.is_active());
+    }
+
+    #[test]
+    fn test_game_object_layer() {
+        let doc = create_test_game_object();
+        let go = GameObject::new(&doc).unwrap();
+        assert_eq!(go.layer(), Some(0));
+    }
+
+    #[test]
+    fn test_game_object_file_id() {
+        let doc = create_test_game_object();
+        let go = GameObject::new(&doc).unwrap();
+        assert_eq!(go.file_id().as_i64(), 12345);
+    }
+
+    #[test]
+    fn test_non_game_object() {
+        let mut doc = create_test_game_object();
+        doc.type_id = 4; // Transform type ID
+        doc.class_name = "Transform".to_string();
+
+        let go = GameObject::new(&doc);
+        assert!(go.is_none());
+    }
+}

src/types/ids.rs

@@ -0,0 +1,131 @@
+//! Unity ID types
+
+use std::fmt;
+
+/// A Unity file ID, used to reference Unity objects within a file
+///
+/// # Examples
+///
+/// ```
+/// use cursebreaker_parser::FileID;
+///
+/// let file_id = FileID::from_i64(1866116814460599870);
+/// assert_eq!(file_id.as_i64(), 1866116814460599870);
+/// ```
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+pub struct FileID(i64);
+
+impl FileID {
+    /// Create a FileID from an i64
+    pub fn from_i64(id: i64) -> Self {
+        Self(id)
+    }
+
+    /// Get the underlying i64 value
+    pub fn as_i64(&self) -> i64 {
+        self.0
+    }
+}
+
+impl fmt::Display for FileID {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+impl From<i64> for FileID {
+    fn from(id: i64) -> Self {
+        Self::from_i64(id)
+    }
+}
+
+impl From<FileID> for i64 {
+    fn from(file_id: FileID) -> Self {
+        file_id.as_i64()
+    }
+}
+
+/// A local ID for objects within a Unity file
+///
+/// This is currently an alias for FileID but may have different
+/// semantics in future versions.
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+pub struct LocalID(i64);
+
+impl LocalID {
+    /// Create a LocalID from an i64
+    pub fn from_i64(id: i64) -> Self {
+        Self(id)
+    }
+
+    /// Get the underlying i64 value
+    pub fn as_i64(&self) -> i64 {
+        self.0
+    }
+}
+
+impl fmt::Display for LocalID {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+impl From<i64> for LocalID {
+    fn from(id: i64) -> Self {
+        Self::from_i64(id)
+    }
+}
+
+impl From<LocalID> for i64 {
+    fn from(local_id: LocalID) -> Self {
+        local_id.as_i64()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_file_id_creation() {
+        let file_id = FileID::from_i64(12345);
+        assert_eq!(file_id.as_i64(), 12345);
+    }
+
+    #[test]
+    fn test_file_id_display() {
+        let file_id = FileID::from_i64(1866116814460599870);
+        assert_eq!(format!("{}", file_id), "1866116814460599870");
+    }
+
+    #[test]
+    fn test_file_id_equality() {
+        let id1 = FileID::from_i64(12345);
+        let id2 = FileID::from_i64(12345);
+        let id3 = FileID::from_i64(67890);
+
+        assert_eq!(id1, id2);
+        assert_ne!(id1, id3);
+    }
+
+    #[test]
+    fn test_file_id_conversion() {
+        let id: FileID = 12345.into();
+        assert_eq!(id.as_i64(), 12345);
+
+        let value: i64 = id.into();
+        assert_eq!(value, 12345);
+    }
+
+    #[test]
+    fn test_local_id_creation() {
+        let local_id = LocalID::from_i64(12345);
+        assert_eq!(local_id.as_i64(), 12345);
+    }
+
+    #[test]
+    fn test_local_id_display() {
+        let local_id = LocalID::from_i64(67890);
+        assert_eq!(format!("{}", local_id), "67890");
+    }
+}

src/types/mod.rs

@@ -0,0 +1,17 @@
+//! Unity-specific types and wrappers
+//!
+//! This module provides type-safe representations of Unity types,
+//! including IDs, value types (Vector3, Color, etc.), and high-level
+//! wrappers for GameObjects and Components.
+
+mod component;
+mod game_object;
+mod ids;
+mod transform;
+mod values;
+
+pub use component::{Component, GenericComponent};
+pub use game_object::GameObject;
+pub use ids::{FileID, LocalID};
+pub use transform::{RectTransform, Transform};
+pub use values::{Color, ExternalRef, FileRef, Quaternion, Vector2, Vector3};

src/types/transform.rs

@@ -0,0 +1,398 @@
+//! Transform and RectTransform component wrappers
+
+use crate::model::UnityDocument;
+use crate::types::{Component, FileRef, Quaternion, Vector2, Vector3};
+
+/// A wrapper around a UnityDocument that represents a Transform component
+///
+/// Provides convenient access to Transform properties like position, rotation, and scale.
+///
+/// # Examples
+///
+/// ```no_run
+/// use cursebreaker_parser::{UnityFile, types::Transform};
+///
+/// let file = UnityFile::from_path("Scene.unity")?;
+/// for doc in &file.documents {
+///     if let Some(transform) = Transform::new(doc) {
+///         if let Some(pos) = transform.local_position() {
+///             println!("Position: ({}, {}, {})", pos.x, pos.y, pos.z);
+///         }
+///     }
+/// }
+/// # Ok::<(), cursebreaker_parser::Error>(())
+/// ```
+#[derive(Debug)]
+pub struct Transform<'a> {
+    document: &'a UnityDocument,
+}
+
+impl<'a> Transform<'a> {
+    /// Create a Transform wrapper from a UnityDocument
+    ///
+    /// Returns None if the document is not a Transform or RectTransform.
+    pub fn new(document: &'a UnityDocument) -> Option<Self> {
+        if document.class_name == "Transform" || document.class_name == "RectTransform" {
+            Some(Self { document })
+        } else {
+            None
+        }
+    }
+
+    /// Get the local position of this transform
+    pub fn local_position(&self) -> Option<&Vector3> {
+        self.get_transform_props()
+            .and_then(|props| props.get("m_LocalPosition"))
+            .and_then(|v| v.as_vector3())
+    }
+
+    /// Get the local rotation of this transform
+    pub fn local_rotation(&self) -> Option<&Quaternion> {
+        self.get_transform_props()
+            .and_then(|props| props.get("m_LocalRotation"))
+            .and_then(|v| v.as_quaternion())
+    }
+
+    /// Get the local scale of this transform
+    pub fn local_scale(&self) -> Option<&Vector3> {
+        self.get_transform_props()
+            .and_then(|props| props.get("m_LocalScale"))
+            .and_then(|v| v.as_vector3())
+    }
+
+    /// Get the parent transform reference
+    pub fn parent(&self) -> Option<FileRef> {
+        self.get_transform_props()
+            .and_then(|props| props.get("m_Father"))
+            .and_then(|v| v.as_file_ref())
+            .copied()
+    }
+
+    /// Get the list of child transform references
+    pub fn children(&self) -> Vec<FileRef> {
+        self.get_transform_props()
+            .and_then(|props| props.get("m_Children"))
+            .and_then(|v| v.as_array())
+            .map(|arr| {
+                arr.iter()
+                    .filter_map(|item| item.as_file_ref())
+                    .copied()
+                    .collect()
+            })
+            .unwrap_or_default()
+    }
+
+    /// Helper to get the transform properties object
+    fn get_transform_props(&self) -> Option<&indexmap::IndexMap<String, crate::property::PropertyValue>> {
+        self.document
+            .get(&self.document.class_name)
+            .and_then(|v| v.as_object())
+    }
+}
+
+impl<'a> Component for Transform<'a> {
+    fn game_object(&self) -> Option<FileRef> {
+        self.get_transform_props()
+            .and_then(|props| props.get("m_GameObject"))
+            .and_then(|v| v.as_file_ref())
+            .copied()
+    }
+
+    fn is_enabled(&self) -> bool {
+        true // Transforms are always enabled
+    }
+
+    fn document(&self) -> &UnityDocument {
+        self.document
+    }
+}
+
+/// A wrapper around a UnityDocument that represents a RectTransform component
+///
+/// RectTransform is used for UI elements and extends Transform with additional properties.
+///
+/// # Examples
+///
+/// ```no_run
+/// use cursebreaker_parser::{UnityFile, types::RectTransform};
+///
+/// let file = UnityFile::from_path("Canvas.prefab")?;
+/// for doc in &file.documents {
+///     if let Some(rect_transform) = RectTransform::new(doc) {
+///         if let Some(anchor_min) = rect_transform.anchor_min() {
+///             println!("Anchor Min: ({}, {})", anchor_min.x, anchor_min.y);
+///         }
+///     }
+/// }
+/// # Ok::<(), cursebreaker_parser::Error>(())
+/// ```
+#[derive(Debug)]
+pub struct RectTransform<'a> {
+    transform: Transform<'a>,
+}
+
+impl<'a> RectTransform<'a> {
+    /// Create a RectTransform wrapper from a UnityDocument
+    ///
+    /// Returns None if the document is not a RectTransform.
+    pub fn new(document: &'a UnityDocument) -> Option<Self> {
+        if document.class_name == "RectTransform" {
+            Some(Self {
+                transform: Transform { document },
+            })
+        } else {
+            None
+        }
+    }
+
+    /// Get the anchor min (bottom-left anchor)
+    pub fn anchor_min(&self) -> Option<&Vector2> {
+        self.get_rect_props()
+            .and_then(|props| props.get("m_AnchorMin"))
+            .and_then(|v| v.as_vector2())
+    }
+
+    /// Get the anchor max (top-right anchor)
+    pub fn anchor_max(&self) -> Option<&Vector2> {
+        self.get_rect_props()
+            .and_then(|props| props.get("m_AnchorMax"))
+            .and_then(|v| v.as_vector2())
+    }
+
+    /// Get the anchored position
+    pub fn anchored_position(&self) -> Option<&Vector2> {
+        self.get_rect_props()
+            .and_then(|props| props.get("m_AnchoredPosition"))
+            .and_then(|v| v.as_vector2())
+    }
+
+    /// Get the size delta
+    pub fn size_delta(&self) -> Option<&Vector2> {
+        self.get_rect_props()
+            .and_then(|props| props.get("m_SizeDelta"))
+            .and_then(|v| v.as_vector2())
+    }
+
+    /// Get the pivot point
+    pub fn pivot(&self) -> Option<&Vector2> {
+        self.get_rect_props()
+            .and_then(|props| props.get("m_Pivot"))
+            .and_then(|v| v.as_vector2())
+    }
+
+    /// Get the local position (from Transform)
+    pub fn local_position(&self) -> Option<&Vector3> {
+        self.transform.local_position()
+    }
+
+    /// Get the local rotation (from Transform)
+    pub fn local_rotation(&self) -> Option<&Quaternion> {
+        self.transform.local_rotation()
+    }
+
+    /// Get the local scale (from Transform)
+    pub fn local_scale(&self) -> Option<&Vector3> {
+        self.transform.local_scale()
+    }
+
+    /// Get the parent transform reference (from Transform)
+    pub fn parent(&self) -> Option<FileRef> {
+        self.transform.parent()
+    }
+
+    /// Get the list of child transform references (from Transform)
+    pub fn children(&self) -> Vec<FileRef> {
+        self.transform.children()
+    }
+
+    /// Helper to get the RectTransform properties object
+    fn get_rect_props(&self) -> Option<&indexmap::IndexMap<String, crate::property::PropertyValue>> {
+        self.transform.get_transform_props()
+    }
+}
+
+impl<'a> Component for RectTransform<'a> {
+    fn game_object(&self) -> Option<FileRef> {
+        self.transform.game_object()
+    }
+
+    fn is_enabled(&self) -> bool {
+        self.transform.is_enabled()
+    }
+
+    fn document(&self) -> &UnityDocument {
+        self.transform.document()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::property::PropertyValue;
+    use crate::types::FileID;
+    use indexmap::IndexMap;
+
+    fn create_test_transform() -> UnityDocument {
+        let mut properties = IndexMap::new();
+
+        let mut transform_props = IndexMap::new();
+        transform_props.insert(
+            "m_LocalPosition".to_string(),
+            PropertyValue::Vector3(Vector3::new(1.0, 2.0, 3.0)),
+        );
+        transform_props.insert(
+            "m_LocalRotation".to_string(),
+            PropertyValue::Quaternion(Quaternion::identity()),
+        );
+        transform_props.insert(
+            "m_LocalScale".to_string(),
+            PropertyValue::Vector3(Vector3::one()),
+        );
+        transform_props.insert(
+            "m_GameObject".to_string(),
+            PropertyValue::FileRef(crate::types::FileRef::new(FileID::from_i64(67890))),
+        );
+        transform_props.insert("m_Children".to_string(), PropertyValue::Array(vec![]));
+
+        properties.insert("Transform".to_string(), PropertyValue::Object(transform_props));
+
+        UnityDocument {
+            type_id: 4,
+            file_id: FileID::from_i64(12345),
+            class_name: "Transform".to_string(),
+            properties,
+        }
+    }
+
+    fn create_test_rect_transform() -> UnityDocument {
+        let mut properties = IndexMap::new();
+
+        let mut rect_props = IndexMap::new();
+        rect_props.insert(
+            "m_LocalPosition".to_string(),
+            PropertyValue::Vector3(Vector3::zero()),
+        );
+        rect_props.insert(
+            "m_LocalRotation".to_string(),
+            PropertyValue::Quaternion(Quaternion::identity()),
+        );
+        rect_props.insert(
+            "m_LocalScale".to_string(),
+            PropertyValue::Vector3(Vector3::one()),
+        );
+        rect_props.insert(
+            "m_AnchorMin".to_string(),
+            PropertyValue::Vector2(Vector2::zero()),
+        );
+        rect_props.insert(
+            "m_AnchorMax".to_string(),
+            PropertyValue::Vector2(Vector2::one()),
+        );
+        rect_props.insert(
+            "m_AnchoredPosition".to_string(),
+            PropertyValue::Vector2(Vector2::zero()),
+        );
+        rect_props.insert(
+            "m_SizeDelta".to_string(),
+            PropertyValue::Vector2(Vector2::new(100.0, 50.0)),
+        );
+        rect_props.insert(
+            "m_Pivot".to_string(),
+            PropertyValue::Vector2(Vector2::new(0.5, 0.5)),
+        );
+
+        properties.insert("RectTransform".to_string(), PropertyValue::Object(rect_props));
+
+        UnityDocument {
+            type_id: 224,
+            file_id: FileID::from_i64(12345),
+            class_name: "RectTransform".to_string(),
+            properties,
+        }
+    }
+
+    #[test]
+    fn test_transform_creation() {
+        let doc = create_test_transform();
+        let transform = Transform::new(&doc);
+        assert!(transform.is_some());
+    }
+
+    #[test]
+    fn test_transform_local_position() {
+        let doc = create_test_transform();
+        let transform = Transform::new(&doc).unwrap();
+        let pos = transform.local_position().unwrap();
+        assert_eq!(pos.x, 1.0);
+        assert_eq!(pos.y, 2.0);
+        assert_eq!(pos.z, 3.0);
+    }
+
+    #[test]
+    fn test_transform_local_rotation() {
+        let doc = create_test_transform();
+        let transform = Transform::new(&doc).unwrap();
+        let rot = transform.local_rotation().unwrap();
+        assert_eq!(rot.w, 1.0);
+    }
+
+    #[test]
+    fn test_transform_local_scale() {
+        let doc = create_test_transform();
+        let transform = Transform::new(&doc).unwrap();
+        let scale = transform.local_scale().unwrap();
+        assert_eq!(scale, &Vector3::one());
+    }
+
+    #[test]
+    fn test_rect_transform_creation() {
+        let doc = create_test_rect_transform();
+        let rect_transform = RectTransform::new(&doc);
+        assert!(rect_transform.is_some());
+    }
+
+    #[test]
+    fn test_rect_transform_anchor_min() {
+        let doc = create_test_rect_transform();
+        let rect_transform = RectTransform::new(&doc).unwrap();
+        let anchor_min = rect_transform.anchor_min().unwrap();
+        assert_eq!(anchor_min, &Vector2::zero());
+    }
+
+    #[test]
+    fn test_rect_transform_anchor_max() {
+        let doc = create_test_rect_transform();
+        let rect_transform = RectTransform::new(&doc).unwrap();
+        let anchor_max = rect_transform.anchor_max().unwrap();
+        assert_eq!(anchor_max, &Vector2::one());
+    }
+
+    #[test]
+    fn test_rect_transform_size_delta() {
+        let doc = create_test_rect_transform();
+        let rect_transform = RectTransform::new(&doc).unwrap();
+        let size_delta = rect_transform.size_delta().unwrap();
+        assert_eq!(size_delta.x, 100.0);
+        assert_eq!(size_delta.y, 50.0);
+    }
+
+    #[test]
+    fn test_rect_transform_pivot() {
+        let doc = create_test_rect_transform();
+        let rect_transform = RectTransform::new(&doc).unwrap();
+        let pivot = rect_transform.pivot().unwrap();
+        assert_eq!(pivot.x, 0.5);
+        assert_eq!(pivot.y, 0.5);
+    }
+
+    #[test]
+    fn test_rect_transform_inherits_from_transform() {
+        let doc = create_test_rect_transform();
+        let rect_transform = RectTransform::new(&doc).unwrap();
+
+        // Test inherited methods
+        assert!(rect_transform.local_position().is_some());
+        assert!(rect_transform.local_rotation().is_some());
+        assert!(rect_transform.local_scale().is_some());
+    }
+}

src/types/values.rs

@@ -0,0 +1,303 @@
+//! Unity-specific value types
+
+use super::FileID;
+
+/// A 2D vector used in Unity
+///
+/// # Examples
+///
+/// ```
+/// use cursebreaker_parser::Vector2;
+///
+/// let v = Vector2::new(1.0, 2.0);
+/// assert_eq!(v.x, 1.0);
+/// assert_eq!(v.y, 2.0);
+/// ```
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub struct Vector2 {
+    pub x: f32,
+    pub y: f32,
+}
+
+impl Vector2 {
+    /// Create a new Vector2
+    pub fn new(x: f32, y: f32) -> Self {
+        Self { x, y }
+    }
+
+    /// Create a zero vector (0, 0)
+    pub fn zero() -> Self {
+        Self::new(0.0, 0.0)
+    }
+
+    /// Create a one vector (1, 1)
+    pub fn one() -> Self {
+        Self::new(1.0, 1.0)
+    }
+}
+
+/// A 3D vector used in Unity for positions, scales, etc.
+///
+/// # Examples
+///
+/// ```
+/// use cursebreaker_parser::Vector3;
+///
+/// let v = Vector3::new(1.0, 2.0, 3.0);
+/// assert_eq!(v.x, 1.0);
+/// assert_eq!(v.y, 2.0);
+/// assert_eq!(v.z, 3.0);
+/// ```
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub struct Vector3 {
+    pub x: f32,
+    pub y: f32,
+    pub z: f32,
+}
+
+impl Vector3 {
+    /// Create a new Vector3
+    pub fn new(x: f32, y: f32, z: f32) -> Self {
+        Self { x, y, z }
+    }
+
+    /// Create a zero vector (0, 0, 0)
+    pub fn zero() -> Self {
+        Self::new(0.0, 0.0, 0.0)
+    }
+
+    /// Create a one vector (1, 1, 1)
+    pub fn one() -> Self {
+        Self::new(1.0, 1.0, 1.0)
+    }
+
+    /// Create an up vector (0, 1, 0)
+    pub fn up() -> Self {
+        Self::new(0.0, 1.0, 0.0)
+    }
+
+    /// Create a forward vector (0, 0, 1)
+    pub fn forward() -> Self {
+        Self::new(0.0, 0.0, 1.0)
+    }
+
+    /// Create a right vector (1, 0, 0)
+    pub fn right() -> Self {
+        Self::new(1.0, 0.0, 0.0)
+    }
+}
+
+/// A color with RGBA components
+///
+/// # Examples
+///
+/// ```
+/// use cursebreaker_parser::Color;
+///
+/// let c = Color::new(1.0, 0.5, 0.0, 1.0);
+/// assert_eq!(c.r, 1.0);
+/// assert_eq!(c.a, 1.0);
+/// ```
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub struct Color {
+    pub r: f32,
+    pub g: f32,
+    pub b: f32,
+    pub a: f32,
+}
+
+impl Color {
+    /// Create a new Color
+    pub fn new(r: f32, g: f32, b: f32, a: f32) -> Self {
+        Self { r, g, b, a }
+    }
+
+    /// Create a white color (1, 1, 1, 1)
+    pub fn white() -> Self {
+        Self::new(1.0, 1.0, 1.0, 1.0)
+    }
+
+    /// Create a black color (0, 0, 0, 1)
+    pub fn black() -> Self {
+        Self::new(0.0, 0.0, 0.0, 1.0)
+    }
+
+    /// Create a transparent color (0, 0, 0, 0)
+    pub fn clear() -> Self {
+        Self::new(0.0, 0.0, 0.0, 0.0)
+    }
+
+    /// Create a red color (1, 0, 0, 1)
+    pub fn red() -> Self {
+        Self::new(1.0, 0.0, 0.0, 1.0)
+    }
+
+    /// Create a green color (0, 1, 0, 1)
+    pub fn green() -> Self {
+        Self::new(0.0, 1.0, 0.0, 1.0)
+    }
+
+    /// Create a blue color (0, 0, 1, 1)
+    pub fn blue() -> Self {
+        Self::new(0.0, 0.0, 1.0, 1.0)
+    }
+}
+
+/// A quaternion used for rotations in Unity
+///
+/// # Examples
+///
+/// ```
+/// use cursebreaker_parser::Quaternion;
+///
+/// let q = Quaternion::identity();
+/// assert_eq!(q.w, 1.0);
+/// ```
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub struct Quaternion {
+    pub x: f32,
+    pub y: f32,
+    pub z: f32,
+    pub w: f32,
+}
+
+impl Quaternion {
+    /// Create a new Quaternion
+    pub fn new(x: f32, y: f32, z: f32, w: f32) -> Self {
+        Self { x, y, z, w }
+    }
+
+    /// Create an identity quaternion (0, 0, 0, 1)
+    pub fn identity() -> Self {
+        Self::new(0.0, 0.0, 0.0, 1.0)
+    }
+}
+
+/// A reference to another Unity object by file ID
+///
+/// # Examples
+///
+/// ```
+/// use cursebreaker_parser::{FileRef, FileID};
+///
+/// let file_ref = FileRef::new(FileID::from_i64(12345));
+/// assert_eq!(file_ref.file_id.as_i64(), 12345);
+/// ```
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct FileRef {
+    pub file_id: FileID,
+}
+
+impl FileRef {
+    /// Create a new FileRef
+    pub fn new(file_id: FileID) -> Self {
+        Self { file_id }
+    }
+}
+
+/// A reference to an external Unity asset by GUID
+///
+/// # Examples
+///
+/// ```
+/// use cursebreaker_parser::ExternalRef;
+///
+/// let ext_ref = ExternalRef::new("abc123".to_string(), 2);
+/// assert_eq!(ext_ref.guid, "abc123");
+/// assert_eq!(ext_ref.type_id, 2);
+/// ```
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ExternalRef {
+    pub guid: String,
+    pub type_id: i32,
+}
+
+impl ExternalRef {
+    /// Create a new ExternalRef
+    pub fn new(guid: String, type_id: i32) -> Self {
+        Self { guid, type_id }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_vector2_creation() {
+        let v = Vector2::new(1.0, 2.0);
+        assert_eq!(v.x, 1.0);
+        assert_eq!(v.y, 2.0);
+    }
+
+    #[test]
+    fn test_vector2_zero() {
+        let v = Vector2::zero();
+        assert_eq!(v, Vector2::new(0.0, 0.0));
+    }
+
+    #[test]
+    fn test_vector3_creation() {
+        let v = Vector3::new(1.0, 2.0, 3.0);
+        assert_eq!(v.x, 1.0);
+        assert_eq!(v.y, 2.0);
+        assert_eq!(v.z, 3.0);
+    }
+
+    #[test]
+    fn test_vector3_zero() {
+        let v = Vector3::zero();
+        assert_eq!(v, Vector3::new(0.0, 0.0, 0.0));
+    }
+
+    #[test]
+    fn test_vector3_directions() {
+        assert_eq!(Vector3::up(), Vector3::new(0.0, 1.0, 0.0));
+        assert_eq!(Vector3::forward(), Vector3::new(0.0, 0.0, 1.0));
+        assert_eq!(Vector3::right(), Vector3::new(1.0, 0.0, 0.0));
+    }
+
+    #[test]
+    fn test_color_creation() {
+        let c = Color::new(1.0, 0.5, 0.0, 1.0);
+        assert_eq!(c.r, 1.0);
+        assert_eq!(c.g, 0.5);
+        assert_eq!(c.b, 0.0);
+        assert_eq!(c.a, 1.0);
+    }
+
+    #[test]
+    fn test_color_presets() {
+        assert_eq!(Color::white(), Color::new(1.0, 1.0, 1.0, 1.0));
+        assert_eq!(Color::black(), Color::new(0.0, 0.0, 0.0, 1.0));
+        assert_eq!(Color::red(), Color::new(1.0, 0.0, 0.0, 1.0));
+        assert_eq!(Color::green(), Color::new(0.0, 1.0, 0.0, 1.0));
+        assert_eq!(Color::blue(), Color::new(0.0, 0.0, 1.0, 1.0));
+    }
+
+    #[test]
+    fn test_quaternion_creation() {
+        let q = Quaternion::new(0.0, 0.0, 0.0, 1.0);
+        assert_eq!(q.x, 0.0);
+        assert_eq!(q.w, 1.0);
+    }
+
+    #[test]
+    fn test_quaternion_identity() {
+        let q = Quaternion::identity();
+        assert_eq!(q, Quaternion::new(0.0, 0.0, 0.0, 1.0));
+    }
+
+    #[test]
+    fn test_file_ref_creation() {
+        let file_ref = FileRef::new(FileID::from_i64(12345));
+        assert_eq!(file_ref.file_id.as_i64(), 12345);
+    }
+
+    #[test]
+    fn test_external_ref_creation() {
+        let ext_ref = ExternalRef::new("abc123".to_string(), 2);
+        assert_eq!(ext_ref.guid, "abc123");
+        assert_eq!(ext_ref.type_id, 2);
+    }
+}

tests/integration_tests.rs

@@ -25,8 +25,8 @@ fn test_parse_cardgrabber_prefab() {
 
     // Verify the name property exists
     if let Some(go_props) = game_object.get("GameObject") {
-        if let Some(props) = go_props.as_mapping() {
-            let has_name = props.keys().any(|k| k.as_str() == Some("m_Name"));
+        if let Some(props) = go_props.as_object() {
+            let has_name = props.contains_key("m_Name");
             assert!(has_name, "GameObject should have m_Name property");
         }
     }