Add explicit managed traits and inherited method arity contracts

2026-10-21 21:34:46 +08:00
parent b7daabdaad
commit eb60212428
16 changed files with 454 additions and 16 deletions
@@ -13,6 +13,11 @@ pub enum VmError {
    UnsupportedOperation(&'static str),
    InvalidArgument(&'static str),
    ObjectKindMismatch(&'static str),
+    TraitViolation {
+        capability: String,
+        method: String,
+        reason: &'static str,
+    },
    EmptyCell,
    InvalidBytecode {
        offset: usize,
@@ -43,6 +48,11 @@ impl fmt::Display for VmError {
            }
            Self::InvalidArgument(message) => f.write_str(message),
            Self::ObjectKindMismatch(expected) => write!(f, "expected {expected} object"),
+            Self::TraitViolation {
+                capability,
+                method,
+                reason,
+            } => write!(f, "trait {capability} method {method}: {reason}"),
            Self::EmptyCell => f.write_str("cell is empty"),
            Self::InvalidBytecode { offset, reason } => {
                write!(f, "invalid bytecode at code unit {offset}: {reason}")