Making a error recovery system

2026-05-15 12:09:30 +02:00
parent 3aba4a359b
commit 216c61228c
5 changed files with 72 additions and 3 deletions
@@ -26,3 +26,68 @@ pub fn parse<'a>(source: &'a str) -> Result<Vec<TopLevel>, ParseError<'a, Vec<To

    Ok(statements)
 }
+
+#[macro_export]
+macro_rules! ast_expr {
+    ($($item:ident)::+ { $($k:ident: $v:expr),* $(,)? }) => {{
+        let mut err = None;
+
+        let v = $($item)::+ {
+            $(
+                $k: {
+                    let r = $v.get();
+
+                    if let Err(e) = r {
+                        err = Some(e.clone().get());
+
+                        if let Some(recovered) = e.recovered {
+                            Ok(recovered)
+                        } else {
+                            Err(e)
+                        }
+                    } else {
+                        r
+                    }
+                }.get()?
+            ),*
+        };
+
+        if let Some(mut e) = err {
+            e.recovered = Some(v);
+            Err(e)
+        } else {
+            Ok(v)
+        }
+    }};
+
+    ($($item:ident)::+ ( $($v:expr),* $(,)? )) => {{
+        let mut err = None;
+
+        let v = $($item)::+ ( $({
+            let r = $v.get();
+
+            if let Err(e) = r {
+                err = Some(e.clone().get());
+
+                if let Some(recovered) = e.recovered {
+                    Ok(recovered)
+                } else {
+                    Err(e)
+                }
+            } else {
+                r
+            }
+        }.get()?),* );
+
+        if let Some(mut e) = err {
+            e.recovered = Some(v);
+            Err(e)
+        } else {
+            Ok(v)
+        }
+    }};
+
+    ($($item:ident)::+) => {
+        $($item)::+
+    };
+}