feat(engine): add basic Wavefront obj file parsing

1 files changed, 24 insertions, 0 deletions

diff --git a/engine/src/util.rs b/engine/src/util.rs
new file mode 100644
index 0000000..021b2fe
--- /dev/null
+++ b/engine/src/util.rs
@@ -0,0 +1,24 @@
+macro_rules! try_option {
+    ($expr: expr) => {
+        match $expr {
+            Ok(value) => value,
+            Err(err) => {
+                return Some(Err(err));
+            }
+        }
+    };
+}
+
+pub(crate) use try_option;
+
+macro_rules! or {
+    (($($tt: tt)+) else ($($else_tt: tt)*)) => {
+        $($tt)+
+    };
+
+    (() else ($($else_tt: tt)*)) => {
+        $($else_tt)*
+    };
+}
+
+pub(crate) use or;