refactor(naga): use String for ExpressionError::InvalidArgumentType's op. description

Author: ErichDonGubler

naga/src/valid/expression.rs

@@ -1,3 +1,5 @@
+use alloc::{format, string::String};
+
 use super::{compose::validate_compose, FunctionInfo, ModuleInfo, ShaderStages, TypeFlags};
 use crate::arena::UniqueArena;
 use crate::{
@@ -129,7 +131,7 @@ pub enum ExpressionError {
     #[error("Invalid argument count for {0:?}")]
     WrongArgumentCount(crate::MathFunction),
     #[error("Argument [{1}] to {0:?} as expression {2:?} has an invalid type.")]
-    InvalidArgumentType(crate::MathFunction, u32, Handle<crate::Expression>),
+    InvalidArgumentType(String, u32, Handle<crate::Expression>),
     #[error(
         "workgroupUniformLoad result type can't be {0:?}. It can only be a constructible type."
     )]
@@ -1055,7 +1057,11 @@ impl super::Validator {
 
                     if overloads.is_empty() {
                         log::debug!("all overloads eliminated");
-                        return Err(ExpressionError::InvalidArgumentType(fun, i as u32, expr));
+                        return Err(ExpressionError::InvalidArgumentType(
+                            format!("{fun:?}"),
+                            i as u32,
+                            expr,
+                        ));
                     }
                 }