refactor(naga): use String for ExpressionError::WrongArgumentCount

Author: ErichDonGubler

naga/src/valid/expression.rs

@@ -128,8 +128,8 @@ pub enum ExpressionError {
     InvalidSampleLevelGradientType(crate::ImageDimension, Handle<crate::Expression>),
     #[error("Unable to cast")]
     InvalidCastArgument,
-    #[error("Invalid argument count for {0:?}")]
-    WrongArgumentCount(crate::MathFunction),
+    #[error("Invalid argument count for {0}")]
+    WrongArgumentCount(String),
     #[error("Argument [{1}] to {0:?} as expression {2:?} has an invalid type.")]
     InvalidArgumentType(String, u32, Handle<crate::Expression>),
     #[error(
@@ -1017,7 +1017,7 @@ impl super::Validator {
                     (Some(arg1), None, None) => &[arg, arg1],
                     (Some(arg1), Some(arg2), None) => &[arg, arg1, arg2],
                     (Some(arg1), Some(arg2), Some(arg3)) => &[arg, arg1, arg2, arg3],
-                    _ => return Err(ExpressionError::WrongArgumentCount(fun)),
+                    _ => return Err(ExpressionError::WrongArgumentCount(format!("{fun:?}"))),
                 };
 
                 let resolve = |arg| &resolver[arg];
@@ -1066,7 +1066,7 @@ impl super::Validator {
                 }
 
                 if actuals.len() < overloads.min_arguments() {
-                    return Err(ExpressionError::WrongArgumentCount(fun));
+                    return Err(ExpressionError::WrongArgumentCount(format!("{fun:?}")));
                 }
 
                 ShaderStages::all()