derive macros for entity parsing

derive/tests/expand.rs

@@ -0,0 +1,27 @@
+use vbsp::RawEntity;
+use vbsp_derive::Entity;
+
+#[derive(Entity)]
+pub struct SpotLight {
+    pub angles: [f32; 3],
+    #[entity(name = "render_color")]
+    pub color: [u8; 3],
+    pub cone: u8,
+    #[entity(default)]
+    pub optional: bool,
+}
+
+#[derive(Entity)]
+pub struct Lifetime<'a> {
+    pub model: &'a str,
+}
+
+#[derive(Entity)]
+pub enum Entity<'a> {
+    // #[entity(name = "spot")]
+    // SpotLight(SpotLight),
+    #[entity(name = "bar")]
+    Foo(Lifetime<'a>),
+    #[entity(default)]
+    Unknown(RawEntity<'a>),
+}